Nokia lcd include , small footprint to suit pic16's

**richard** · - 16th May 2018, 12:06

Entire demo is 872 words ,its less than 1/3 size of other attempts and has same features and a full alpha-numeric font

**Ioannis** · - 16th May 2018, 16:37

Amazing work Richard.

5*

Ioannis

**wjsmarine** · - 17th May 2018, 11:10

Well done Richard, Ioannis almost got it right - put a star up against your name and let's call it 6*.

Regards,
Bill

**Mike, K8LH** · - 18th May 2018, 10:24

I agree... nicely done, Richard. I can't tell you how much I enjoy studying and learning from your code.

I was inspired by how you compressed a 96 character 5x7 font table down to something like 288 words and I spent most of the day implementing something similar on an old 5110 demo program written in C for a 16F1823. With just basic INIT, CMD, DAT, and STR functions, the program now uses less than 500 words of program memory. I'm pretty geeked about it! Thank you...

Take care. Have fun. Cheerful regards, Mike

**richard** · - 18th May 2018, 10:50

if you really want to geek it up

changing the output routine to use the mssp module shaves another 10% off the code size
and speeds the thing up by a factor of 10x

din and clk need to be on sdo and sck

this

PAUSEUS 150
SHiftOUT LCD_DIN,LCD_CLK,1,[LcdData]

becomes

PIR1.3=0
SSP1BUF = LcdData
WHILE !PIR1.3 : wend

and this is added to init routine

SSP1CON1=$21 ;$22,21,20 all work @32mhz 20 is fastest
SSP1STAT=$40

**Mike, K8LH** · - 18th May 2018, 16:40

Yes, I already thought about using the SPI module. The current bit-bang driver uses 14 words of memory and runs at ~190-kb/s (with 8-MHz clock). An SPI driver and its init code shouldn't be any bigger. I hope to work on an SPI driver later today. I just need to refresh my memory on the SPI modes. Looks like you're using CKE = 1 and CKP = 0, yes?

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Name: spi modes.png
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Size: 156.5 KB

Implementing the 'packed' font table and extracting data was surprisingly simple, though I'm coding pretty close to the metal and the results are nothing as agile or elegant as your use of the 'readcode' function. Here's an excerpt, if you're interested;

Code:

  /********************************************************************
   *                                                                  *
   ********************************************************************/
   void RdFlash()               // bank 3 (inserted by compiler)
   { asm bcf     _eecon1,CFGS   // not 'config' memory            |03
     asm bsf     _eecon1,EEPGD  // select 'program' memory        |03
     asm bsf     _eecon1,RD     // initiate read operation        |03
     asm nop                    // required nop                   |03
     asm nop                    //  "                             |03
     asm incf    _eeadrl,F      // bump EEADR                     |03
     asm btfsc   _status,Z      //  "                             |03
     asm incf    _eeadrh,F      //  "                             |03
     asm rlf     _eedatl,W      // move b7 into Carry             |03
     asm rlf     _eedath,W      // wreg = the 7 bit hi byte       |03
     asm bcf     _eedatl,7      // eedatl = the 7 bit lo byte     |03
   }                            //

  /********************************************************************
   *                                                                  *
   ********************************************************************/
   void WrChar(char ascii)      // WrChar() for packed 5x7 font
   { asm movf    _ascii,W       // ascii char value, 32..127      |00
     asm addlw   -32            // minus table offset             |00
     asm movwf   _ascii         // font array index, 0..95        |00
 /*                                                                   *
  *  multiply index by 3 (0..95 -> 0..285), add table base address,   *
  *  and stuff the result in the EEADR register pair.                 *
  *                                                                   */
     asm lslf    _wreg,W        // wreg = (ascii-32)*2            |00
     asm addwf   _ascii,W       // wreg = (ascii-32)*3            |00
  // asm movlb   3              // bank 3 (inserted by compiler)  |03
     asm movwf   _eeadrl        // flash address lo               |03
     asm movlw   1024/256       // table address hi               |03
     asm btfsc   _status,C      // overflow? no, skip, else       |03
     asm addlw   1              // bump value                     |03
     asm movwf   _eeadrh        // flash address hi               |03
 /*                                                                   *
  *  read 3 words (6 bytes) of font pattern data from the 5x7 font    *
  *  array and write them to the Nokia 5110 LCD.                      *
  *                                                                   */
     for(char i=0; i<3; i++)    // 
     { RdFlash();               // read one word (2 bytes)
       putlcd(wreg);            // send hi byte
       putlcd(eedatl);          // send lo byte
     }                          //
   }                            //

  /********************************************************************
   *                                                                  *
   ********************************************************************/
   void WrChar(rom char *data)  // overload function for strings
   { char ndx = 0;              //
     while(data[ndx++])         // while not end-of-string
       WrChar(wreg);            //
   }                            //

Code:

 /*                                                                   *
  *  initialize Nokia 5110 LCD display                                *
  *                                                                   */
     delay_ms(30);              //
     rst = 0;                   // 5110 'reset' pulse
     rst = 1;                   //
     dc = 0;                    // command mode
     putlcd(0x20+0x01);         // function set: extended instructions
     putlcd(0x80+0x30);         // set Vop (contrast), 0..127
     putlcd(0x04+0x02);         // set temperature coefficient, 0..3
     putlcd(0x10+0x03);         // Set bias system, 0..7
     putlcd(0x20+0x00);         // function set: standard instructions
     putlcd(0x08+0x04);         // display control: normal mode

     putlcd(0x80+0x20);         // set DDRAM X address, 0..83
     putlcd(0x40+0x02);         // set DDRAM Y address, 0..5
     dc = 1;                    // data mode
     WrChar("Hello");           // test string overload function

Thank you again for sharing your work. Mike

**wjsmarine** · - 19th May 2018, 03:30

Hi Richard,

Just taking a quick look at your Include demo and I can only write 13 characters per line successfully... if 14 then the result is a wrap around and overwriting of the first char. Example below:

Code:

looper:
    LCDCLR
;    LCDSTR  6,0,"-Nokia-Demo-"      ; Line 0, position 6. 
    LCDSTR  0,0,"I wonder what happens if the string is large?"  ; = Rubbish on first line and "missing quote" error message. 
;    LCDSTR  0,0,"I wonder what?"    ; = "? wonder what" [14 chars]
    LCDSTR  0,0,"I wonder what"     ; = "I wonder what" [13 chars only]
    LCDC   0,4,"'"                  ; Line 4, position 0.
    LCDC   25,5,"8"                ; Line 5, position 25.
    PAUSE 1000
    GOTO looper

I'll test more later today and let you know if I find anything else needing a tweak. Again, great job.

Regards,
Bill

**richard** · - 19th May 2018, 04:17

yes probably, but here is a new version with double size chr capability and mssp and font unpacking in asm [like in my ks0108 code]

its not been texted on a pic18 , but its blisteringly fast on the 16f1847, and will fill screen fully

thanks go to blll [wjsmarine] for donation of hardware for this project, enjoy

**wjsmarine** · - 19th May 2018, 10:56

That's impressive, Richard.

Can you explain how your font table works and how you derived those values in each column please? What limits the size of the table one can create?

I'd like to learn from it and maybe if I can get my head around the process find a way to smooth out the double size characters (particularly 0-9, the degree symbol and C) - I'm guessing you are working your magic to achieve double size by math so it probably means making a larger table to accommodate these.

An indication of smooth characters is shown in the pic attached, made with the previous lookup table style, which consumed 4 normal sized chars' area per big one and 2 lines (as does yours) and also noting the degree C was formed as one big character. Apologies for the blurry image, not helped with the scratchy plastic over the LCD to protect the glass...

Thanks for your patience and help.

Regards,
Bill

**richard** · - 19th May 2018, 11:36

I replace the _ chr with @ dw 642 , 9266 ,72 in my fonts to get a deg C chr

achieve double size by math so it probably means making a larger table to accommodate these

correct , I know of no realistic way to smooth the result , it has been tried.
table size is only limited by the memory available.
if you create a large font say 14x10 for digits it would not be an unreasonable size, but would need its own routines to unpack and display
if you plot my font on graph paper its pretty obvious how it works, the pic 18 version is easier to disassemble

**richard** · - 19th May 2018, 12:16

some 8x8 graphpaper
AND an old spread sheet that did the number crunching

**Mike, K8LH** · - 19th May 2018, 22:15

I used a spreadsheet to convert my old 5 byte per character tables, too. Works a treat...

Cheerful regards, Mike

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Name: 5x7 Font Packer-Editor-Viewer.png
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**richard** · - 20th May 2018, 02:42

I came up with the same solution , the freely available font creators [like the mikronta one] don't really
convert the font to the most efficient format for pic's when codespace is an issue.
although they can be a good starting point

**Mike, K8LH** · - 20th May 2018, 10:58

Nice job on the spreadsheet, Richard. I just finished modifying mine to format the packed font table output for either C or asm. Here's a sample;

Code:

	0x0000,	0x0000,	0x0000,	//  32	 ' '
	0x0000,	0x2F80,	0x0000,	//  33	 '!'
	0x0007,	0x0007,	0x0000,	//  34	 '"'
	0x0A7F,	0x0A7F,	0x0A00,	//  35	 '#'
	0x122A,	0x3FAA,	0x0900,	//  36	 '$'
	0x1193,	0x0464,	0x3100,	//  37	 '%'
	0x1B49,	0x2AA2,	0x2800,	//  38	 '&'
	0x0005,	0x0180,	0x0000,	//  39	 '''
	0x001C,	0x1141,	0x0000,	//  40	 '('
	0x0041,	0x111C,	0x0000,	//  41	 ')'
	0x0A08,	0x1F08,	0x0A00,	//  42	 '*'
	0x0408,	0x1F08,	0x0400,	//  43	 '+'

Code:

     dw	0x0000,	0x0000,	0x0000	;  32	 ' '
     dw	0x0000,	0x2F80,	0x0000	;  33	 '!'
     dw	0x0007,	0x0007,	0x0000	;  34	 '"'
     dw	0x0A7F,	0x0A7F,	0x0A00	;  35	 '#'
     dw	0x122A,	0x3FAA,	0x0900	;  36	 '$'
     dw	0x1193,	0x0464,	0x3100	;  37	 '%'
     dw	0x1B49,	0x2AA2,	0x2800	;  38	 '&'
     dw	0x0005,	0x0180,	0x0000	;  39	 '''
     dw	0x001C,	0x1141,	0x0000	;  40	 '('
     dw	0x0041,	0x111C,	0x0000	;  41	 ')'
     dw	0x0A08,	0x1F08,	0x0A00	;  42	 '*'
     dw	0x0408,	0x1F08,	0x0400	;  43	 '+'

I also decided to render all 96 characters directly from the input table so that I can see at-a-glance which characters might need tweaking...

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Name: 5x7 Font Packer #2.png
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**Mike, K8LH** · - 20th May 2018, 20:48

Just finished the font render part of my spreadsheet. It renders directly from the unpacked 5-byte 'input' table. Change a byte in there and you'll see the changes immediately. Mind if I show it off, guys (see below)?

Cheerful regards, Mike, K8LH
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Name: Font 5x7 #1 50%.png
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**Mike, K8LH** · - 24th May 2018, 10:20

Richard... Would you be interested in seeing my driver code for font tables with 2.5 word-per-character packing instead of 3 word-per-character packing? The new '2.5' font tables use 240 words of memory (down from 288 words) and my little single file ~225 line (non-PBP) demo program now weighs in at ~406 words total memory...

Cheerful regards, Mike

**richard** · - 25th May 2018, 00:14

Richard... Would you be interested in seeing my driver code for font tables

yes please, I had considered doing that but could not find a method that preserved the gain
my attempts used half the saved space up doing the unpacking

**Mike, K8LH** · - 25th May 2018, 03:20

First, here's how I'm packing font pattern data into 2-1/2 words within groups of 5 words;

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In the first part of my WrChar() routine I calculate the table address by first subtracting the font table offset (32) from the ASCII character value (32..127). Then I multiply the resulting font table index (0..95) by 2.5 and add the integer result (0..237) to the font table base address. In my case, I'm using a fixed 0x0400 address for the font table so I don't need to perform the addition. I simply stuff the 0..237 value directly into EEADRL and the hi byte of the font table address into EEADRH.

In the other half of my WrChar() routine, if the font table index is even I print the 1st word hi & lo bytes, the 2nd word hi & lo bytes, and the 3rd word hi byte. If the font table index is odd I print the 1st word lo byte, the 2nd word hi & lo bytes, and the 3rd word hi & lo bytes. You'll notice the logic is relatively simple and unrolling the print loop to accommodate the logic doesn't seem to have incurred additional program overhead.

The new demo program (attached below) is 50 words smaller than the old (3-word-per-character) program (406 words total) so it seems I've realized the full 48 word savings from the new packed font table format.

I hope this example provides some useful ideas and I'm sorry I can't help with PBP...

Have fun... Cheerful regards, Mike

Code:

  /********************************************************************
   *                                                                  *
   *  Project: Nokia 5110 16F1823 Demo                                *
   *   Source: Nokia_5110_Packed_v2.c                                 *
   *   Author: Mike McLaren, K8LH                                     *
   *  (C)2013: Micro Application Consultants                          *
   *     Date: 23-May-2018                                            *
   *                                                                  *
   *   Experimental Nokia 5110 LCD display driver demo using a 96     *
   *   character packed 2.5-word-per-character 5x7 font table.        *
   *                                                                  *
   *      IDE: MPLAB 8.92 (tabs = 4)                                  *
   *     Lang: SourceBoost BoostC v7.30, Lite/Free version            *
   *                                                                  *
   ********************************************************************/

   #include <system.h>

   #pragma DATA _CONFIG1, _FOSC_INTOSC & _WDTE_OFF & _MCLRE_ON   
   #pragma DATA _CONFIG2, _PLLEN_OFF & _LVP_OFF

   #pragma CLOCK_FREQ 8000000       // 8 MHz INTOSC

  /********************************************************************
   *  function prototypes                                             *
   ********************************************************************/

  /********************************************************************
   *  typedef, defines, and macros                                    *
   ********************************************************************/

   #define rst porta.0          // RA0 = 5110 'reset'
   #define dat porta.1          // RA1 = 5110 'din'
   #define clk porta.2          // RA2 = 5110 'clk'
   #define ce  portc.0          // RC0 = 5110 'ce'
   #define dc  portc.1          // RC1 = 5110 'dc'
   
   #define putlcd(x)  asm movlw x      \
                      asm call putwreg()

   #define putcmd(x)  dc = 0;          \
                      asm movlw x      \
                      asm call putwreg()

  /********************************************************************
   *  variables & packed 2.5-word-per-character 5x7 font table/array  *
   ********************************************************************/

   #pragma DATA 1024,
     0x0000, 0x0000, 0x0000, 0x005F, 0x0000,    //  32 ' '  '!'
     0x0007, 0x0007, 0x0014, 0x3F94, 0x3F94,    //  34 '"'  '#'
     0x122A, 0x3FAA, 0x0923, 0x0988, 0x3262,    //  36 '$'  '%'
     0x1B49, 0x2AA2, 0x2800, 0x0283, 0x0000,    //  38 '&'  '''
     0x001C, 0x1141, 0x0000, 0x20A2, 0x0E00,    //  40 '('  ')'
     0x0A08, 0x1F08, 0x0A08, 0x043E, 0x0408,    //  42 '*'  '+'
     0x0050, 0x1800, 0x0008, 0x0408, 0x0408,    //  44 ','  '-'
     0x0060, 0x3000, 0x0020, 0x0808, 0x0202,    //  46 '.'  '/'
     0x1F51, 0x24C5, 0x1F00, 0x217F, 0x2000,    //  48 '0'  '1'
     0x2161, 0x28C9, 0x2321, 0x20C5, 0x25B1,    //  50 '2'  '3'
     0x0C14, 0x097F, 0x0827, 0x22C5, 0x22B9,    //  52 '4'  '5'
     0x1E4A, 0x24C9, 0x1801, 0x3889, 0x0283,    //  54 '6'  '7'
     0x1B49, 0x24C9, 0x1B06, 0x24C9, 0x149E,    //  56 '8'  '9'
     0x0036, 0x1B00, 0x0000, 0x2B36, 0x0000,    //  58 ':'  ';'
     0x0414, 0x1141, 0x0014, 0x0A14, 0x0A14,    //  60 '<'  '='
     0x0041, 0x1114, 0x0402, 0x00D1, 0x0486,    //  62 '>'  '?'
     0x1949, 0x3CC1, 0x1F7E, 0x0891, 0x08FE,    //  64 '@'  'A'
     0x3FC9, 0x24C9, 0x1B3E, 0x20C1, 0x20A2,    //  66 'B'  'C'
     0x3FC1, 0x20A2, 0x0E7F, 0x24C9, 0x24C1,    //  68 'D'  'E'
     0x3F89, 0x0489, 0x00BE, 0x20C9, 0x24FA,    //  70 'F'  'G'
     0x3F88, 0x0408, 0x3F80, 0x20FF, 0x2080,    //  72 'H'  'I'
     0x1040, 0x20BF, 0x00FF, 0x0414, 0x1141,    //  74 'J'  'K'
     0x3FC0, 0x2040, 0x207F, 0x010C, 0x017F,    //  76 'L'  'M'
     0x3F84, 0x0410, 0x3FBE, 0x20C1, 0x20BE,    //  78 'N'  'O'
     0x3F89, 0x0489, 0x033E, 0x20D1, 0x10DE,    //  80 'P'  'Q'
     0x3F89, 0x0CA9, 0x2346, 0x24C9, 0x24B1,    //  82 'R'  'S'
     0x0081, 0x3F81, 0x00BF, 0x2040, 0x203F,    //  84 'T'  'U'
     0x0FA0, 0x2020, 0x0FBF, 0x2038, 0x203F,    //  86 'V'  'W'
     0x3194, 0x0414, 0x3187, 0x0470, 0x0407,    //  88 'X'  'Y'
     0x30D1, 0x24C5, 0x2180, 0x3FC1, 0x2080,    //  90 'Z'  '['
     0x0104, 0x0410, 0x1000, 0x20C1, 0x3F80,    //  92 '\'  ']'
     0x0202, 0x0082, 0x0240, 0x2040, 0x2040,    //  94 '^'  '_'
     0x0001, 0x0104, 0x0020, 0x2A54, 0x2A78,    //  96 '`'  'a'
     0x3FC8, 0x2244, 0x1C38, 0x2244, 0x2220,    //  98 'b'  'c'
     0x1C44, 0x2248, 0x3FB8, 0x2A54, 0x2A18,    // 100 'd'  'e'
     0x047E, 0x0481, 0x010C, 0x2952, 0x293E,    // 102 'f'  'g'
     0x3F88, 0x0204, 0x3C00, 0x227D, 0x2000,    // 104 'h'  'i'
     0x1040, 0x223D, 0x007F, 0x0828, 0x2200,    // 106 'j'  'k'
     0x0041, 0x3FC0, 0x007C, 0x0218, 0x0278,    // 108 'l'  'm'
     0x3E08, 0x0204, 0x3C38, 0x2244, 0x2238,    // 110 'n'  'o'
     0x3E14, 0x0A14, 0x0408, 0x0A14, 0x0C7C,    // 112 'p'  'q'
     0x3E08, 0x0204, 0x0448, 0x2A54, 0x2A20,    // 114 'r'  's'
     0x023F, 0x2240, 0x103C, 0x2040, 0x107C,    // 116 't'  'u'
     0x0E20, 0x2020, 0x0E3C, 0x2030, 0x203C,    // 118 'v'  'w'
     0x2228, 0x0828, 0x220C, 0x2850, 0x283C,    // 120 'x'  'y'
     0x2264, 0x2A4C, 0x2200, 0x0436, 0x2080,    // 122 'z'  '{'
     0x0000, 0x3F80, 0x0000, 0x20B6, 0x0400,    // 124 '|'  '}'
     0x0808, 0x0410, 0x0478, 0x2341, 0x2378     // 126 '~'  ''

  /********************************************************************
   *                                                                  *
   ********************************************************************/
   void putwreg()               // send byte, msb first (15 words)
   { char work;                 //
     asm movwf   _work          //
     char n = 0; ce = 0;        // spi enable on
     do                         // send 8 bits
     { clk = 0; dat = 0;        //  "
       if(work.7) dat = 1;      //  "
       clk = 1; work <<= 1;     //  "
       n++;                     //  "
     } while(n.3 == 0);         //  "
     ce = 1;                    // spi enable off
   }                            //

  /********************************************************************
   *                                                                  *
   ********************************************************************/
   void RdFlash()               // bank 3 (inserted by compiler)
   { asm bcf     _eecon1,CFGS   // not 'config' memory            |03
     asm bsf     _eecon1,EEPGD  // select 'program' memory        |03
     asm bsf     _eecon1,RD     // initiate read operation        |03
     asm nop                    // required nop                   |03
     asm nop                    //  "                             |03
     asm incf    _eeadrl,F      // bump EEADR                     |03
     asm rlf     _eedatl,W      // move b7 into Carry             |03
     asm rlf     _eedath,W      // wreg = the 7 bit hi byte       |03
     asm bcf     _eedatl,7      // eedatl = the 7 bit lo byte     |03
   }                            //

  /********************************************************************
   *                                                                  *
   ********************************************************************/
   void WrChar(char ascii)      // for packed 2.5 word 5x7 font
   { dc = 1;                    // set lcd 'data' mode
     asm movlw   -32            // ascii 32..127 minus offset     |00
     asm addwf   _ascii,F       // font array index, 0..95        |00
     asm lsrf    _ascii,W       // int(ascii *= 2.5) -> 0..237    |00
     asm addwf   _ascii,W       //  "                             |00
     asm addwf   _ascii,W       //  "                             |00
  // asm movlb   3              // bank 3 (inserted by compiler)  |03
     asm movwf   _eeadrl        // flash address lo, 0..237       |03
     asm movlw   1024/256       // table address hi               |03
     asm movwf   _eeadrh        // flash address hi               |03
 /*                                                                   *
  *  Extract five bytes of pattern data from three memory words.      *
  *  Odd characters use word 0 lo, 1 hi + lo, and 2 hi + lo while     *
  *  even characters use word 0 hi + lo, 1 hi + lo, and 2 hi.  A      *
  *  sixth blank (zero) byte is sent for inter-character spacing.     *
  *                                                                   */
     asm call    RdFlash()      // read 1st word                  |03
  // asm movlb   0              // bank 0 (inserted by compiler)  |00
     asm btfss   _ascii,0       // odd char? yes, skip, else      |00
     asm call    putwreg()      // send hi byte (even character)  |00
  // asm movlb   3              // bank 3                         |03
     asm movf    _eedatl,W      //                                |03
     asm call    putwreg()      // send lo byte                   |00
     asm call    RdFlash()      // read 2nd word                  |03
     asm call    putwreg()      // send hi byte                   |00
  // asm movlb   3              // bank 3                         |03
     asm movf    _eedatl,W      //                                |03
     asm call    putwreg()      // send lo byte                   |00
     asm call    RdFlash()      // read 3rd word                  |03
     asm call    putwreg()      // send hi byte                   |00
  // asm movlb   3              // bank 3                         |03
     asm movf    _eedatl,W      //                                |03
  // asm movlb   0              // bank 0                         |00
     asm btfsc   _ascii,0       // even char? yes, skip, else     |00
     asm call    putwreg()      // send lo byte (odd characters)  |00
     asm movlw   0              //                                |00
     asm call    putwreg()      // send blank 6th column          |00
   }                            //

  /********************************************************************
   *                                                                  *
   ********************************************************************/
   void WrChar(rom char *data)  // overload function for strings
   { char ndx = 0;              //
     while(data[ndx++])         // while not end-of-string
       WrChar(wreg);            //
   }                            //

  /********************************************************************
   *  main setup                                                      *
   ********************************************************************/

   void main()
   { ansela = 0;                // adc off for digital I/O
     anselc = 0;                //  "
     trisa = 0;                 // porta all outputs except RA3/MCLR
     trisc = 0;                 // portc all outputs
     ce = 1;                    // 5110 'ce' off
     rst = 1;                   // 5110 'rst' off
     osccon = 0b01110000;       // set INTOSC to 8 MHz
 /*                                                                   *
  *  initialize Nokia 5110 LCD display                                *
  *                                                                   */
     delay_ms(30);              //
     rst = 0; rst = 1;          // 5110 'reset' pulse
     putcmd(0x20+0x01);         // function set: extended instructions
     putcmd(0x80+0x30);         // set Vop (contrast), 0..127
     putcmd(0x04+0x02);         // set temperature coefficient, 0..3
     putcmd(0x10+0x03);         // Set bias system, 0..7
     putcmd(0x20+0x00);         // function set: standard instructions
     putcmd(0x08+0x04);         // display control: normal mode
 /*                                                                   *
  *  test the LCD and the print string overload function.             *
  *                                                                   */
     putcmd(0x80+0x20);         // set DDRAM X address, 0..83
     putcmd(0x40+0x02);         // set DDRAM Y address, 0..5
     WrChar('H');               // write ascii character
     WrChar("ello");            // write ascii string

  /********************************************************************
   *  main loop                                                       *
   ********************************************************************/

     while(1)                   //
     {                          //
     }                          //
   }                            //

**richard** · - 25th May 2018, 11:33

thanks mike , the concept works nicely

xc8 version (393)+240 words , uses mssp1

Code:

#include "mcc_generated_files/mcc.h"
#include "FONT.c"
void putwreg(char work);
void putcmd(char x);
void WrChar(char ascii);
void WrStr(char *);
void main(void) {
    // initialize the device
    SYSTEM_Initialize();
    /*                                                                   *
     *  initialize Nokia 5110 LCD display                                *
     *                                                                   */
    __delay_ms(30); //
    LCD_RST_SetLow(); // 5110 'reset' pulse
    __delay_ms(1);
    LCD_RST_SetHigh(); // 5110 'reset' pulse
    __delay_ms(1);
    putcmd(0x20 + 0x01); // function set: extended instructions
    putcmd(0xc8);        // set Vop (contrast), 0..127
    putcmd(0x04 + 0x02); // set temperature coefficient, 0..3
    putcmd(0x10 + 0x03); // Set bias system, 0..7
    putcmd(0x20 + 0x00); // function set: standard instructions
    putcmd(0x08 + 0x04); // display control: normal mode
    putcmd(0x80 + 0x20); // set DDRAM X address, 0..83
    putcmd(0x40 + 0x02); // set DDRAM Y address, 0..5
    WrChar('R'); // write ascii character
    WrStr("eady");
    while (1) {
    }
}
/**
 End of File
 */
 
void putwreg(char work) // send byte, msb first (15 words)
{
    LCD_CE_LAT = 0; // spi enable on
    SPI1_Exchange8bit(work);
    while (!PIR1bits.SSP1IF);
    LCD_CE_LAT = 1; // spi enable off
} //
void WrChar(char ascii) // for packed 2.5 word 5x7 font
{
    unsigned int dat, inx = 0x1f00;
    char i = 5;
    // char fd[6],i=5,*pt;
    //pt=fd;
    inx += ((ascii - 32)*5) >> 1;
    dat = FLASH_ReadWord(inx++);
    if (!(ascii & 1))putwreg(dat >> 7); //  *pt++=dat>>7;
    putwreg(dat & 0x7f);
    //*pt++ =(char)dat&0x7f;     
    dat = FLASH_ReadWord(inx++);
    putwreg(dat >> 7);
    putwreg(dat & 0x7f);
    //*pt++=dat>>7;   
    //*pt++=(char)dat&0x7f;   
    dat = FLASH_ReadWord(inx);
    //*pt++=dat>>7;
    putwreg(dat >> 7);
    if (ascii & 1) putwreg(dat & 0x7f); //*pt++=(char)dat&0x7f;
    //pt=fd;
    // while(i--){
    //    putwreg(*pt++); 
    // }
    putwreg(0);
}
void putcmd(char x) {
    LCD_DC_SetLow();
    putwreg(x);
    LCD_DC_SetHigh();
}
void WrStr(char *buff) {
    { //
        while (*buff) // while not end-of-string
            WrChar(*buff++); //
    }
}

font

Code:

#include <xc.h>
#asm
PSECT strings,class=CODE,abs,delta=2
ORG 0x1f00 
DW    0x0000, 0x0000, 0x0000, 0x005F, 0x0000    //  32 ' '  '!'
DW    0x0007, 0x0007, 0x0014, 0x3F94, 0x3F94    //  34 '"'  '#'
DW    0x122A, 0x3FAA, 0x0923, 0x0988, 0x3262    //  36 '$'  '%'
DW    0x1B49, 0x2AA2, 0x2800, 0x0283, 0x0000    //  38 '&'  '''
DW    0x001C, 0x1141, 0x0000, 0x20A2, 0x0E00    //  40 '('  ')'
DW    0x0A08, 0x1F08, 0x0A08, 0x043E, 0x0408    //  42 '*'  '+'
DW    0x0050, 0x1800, 0x0008, 0x0408, 0x0408    //  44 ','  '-'
DW    0x0060, 0x3000, 0x0020, 0x0808, 0x0202    //  46 '.'  '/'
DW    0x1F51, 0x24C5, 0x1F00, 0x217F, 0x2000    //  48 '0'  '1'
DW    0x2161, 0x28C9, 0x2321, 0x20C5, 0x25B1    //  50 '2'  '3'
DW    0x0C14, 0x097F, 0x0827, 0x22C5, 0x22B9    //  52 '4'  '5'
DW    0x1E4A, 0x24C9, 0x1801, 0x3889, 0x0283    //  54 '6'  '7'
DW    0x1B49, 0x24C9, 0x1B06, 0x24C9, 0x149E    //  56 '8'  '9'
DW    0x0036, 0x1B00, 0x0000, 0x2B36, 0x0000    //  58 ':'  ';'
DW    0x0414, 0x1141, 0x0014, 0x0A14, 0x0A14    //  60 '<'  '='
DW    0x0041, 0x1114, 0x0402, 0x00D1, 0x0486    //  62 '>'  '?'  
DW    0x1949, 0x3CC1, 0x1F7E, 0x0891, 0x08FE    //  64 '@'  'A'
DW    0x3FC9, 0x24C9, 0x1B3E, 0x20C1, 0x20A2    //  66 'B'  'C'
DW    0x3FC1, 0x20A2, 0x0E7F, 0x24C9, 0x24C1    //  68 'D'  'E'
DW    0x3F89, 0x0489, 0x00BE, 0x20C9, 0x24FA    //  70 'F'  'G'
DW    0x3F88, 0x0408, 0x3F80, 0x20FF, 0x2080    //  72 'H'  'I'
DW    0x1040, 0x20BF, 0x00FF, 0x0414, 0x1141    //  74 'J'  'K'
DW    0x3FC0, 0x2040, 0x207F, 0x010C, 0x017F    //  76 'L'  'M'
DW    0x3F84, 0x0410, 0x3FBE, 0x20C1, 0x20BE    //  78 'N'  'O'
DW    0x3F89, 0x0489, 0x033E, 0x20D1, 0x10DE    //  80 'P'  'Q'
DW    0x3F89, 0x0CA9, 0x2346, 0x24C9, 0x24B1    //  82 'R'  'S'
DW    0x0081, 0x3F81, 0x00BF, 0x2040, 0x203F    //  84 'T'  'U'
DW    0x0FA0, 0x2020, 0x0FBF, 0x2038, 0x203F    //  86 'V'  'W'
DW    0x3194, 0x0414, 0x3187, 0x0470, 0x0407    //  88 'X'  'Y'
DW    0x30D1, 0x24C5, 0x2180, 0x3FC1, 0x2080    //  90 'Z'  '['
DW    0x0104, 0x0410, 0x1000, 0x20C1, 0x3F80    //  92 '\'  ']'
DW    0x0202, 0x0082, 0x0240, 0x2040, 0x2040    //  94 '^'  '_'
DW    0x0001, 0x0104, 0x0020, 0x2A54, 0x2A78    //  96 '`'  'a'
DW    0x3FC8, 0x2244, 0x1C38, 0x2244, 0x2220    //  98 'b'  'c'
DW    0x1C44, 0x2248, 0x3FB8, 0x2A54, 0x2A18    // 100 'd'  'e'
DW    0x047E, 0x0481, 0x010C, 0x2952, 0x293E    // 102 'f'  'g'
DW    0x3F88, 0x0204, 0x3C00, 0x227D, 0x2000    // 104 'h'  'i'
DW    0x1040, 0x223D, 0x007F, 0x0828, 0x2200    // 106 'j'  'k'
DW    0x0041, 0x3FC0, 0x007C, 0x0218, 0x0278    // 108 'l'  'm'
DW    0x3E08, 0x0204, 0x3C38, 0x2244, 0x2238    // 110 'n'  'o'
DW    0x3E14, 0x0A14, 0x0408, 0x0A14, 0x0C7C    // 112 'p'  'q'
DW    0x3E08, 0x0204, 0x0448, 0x2A54, 0x2A20    // 114 'r'  's'
DW    0x023F, 0x2240, 0x103C, 0x2040, 0x107C    // 116 't'  'u'
DW    0x0E20, 0x2020, 0x0E3C, 0x2030, 0x203C    // 118 'v'  'w'
DW    0x2228, 0x0828, 0x220C, 0x2850, 0x283C    // 120 'x'  'y'
DW    0x2264, 0x2A4C, 0x2200, 0x0436, 0x2080    // 122 'z'  '{'
DW    0x0000, 0x3F80, 0x0000, 0x20B6, 0x0400    // 124 '|'  '}'
DW    0x0808, 0x0410, 0x0478, 0x2341, 0x2378    // 126 '~'  ''
#endasm

**Mike, K8LH** · - 25th May 2018, 17:38

Nice to see an XC8 example excerpt...

May I ask where I can find information for placing DW data in XC8 at an absolute address, please? I haven't found it so far, nor can I get your example working in a 16F1823 XC8 project...

I'm also struggling with MCC (Microsoft Code Configurator)...

**richard** · - 26th May 2018, 00:30

May I ask where I can find information for placing DW data in XC8 at an absolute address

all my knowledge came from google" xc8 psect" , i have not found a good reference yet
the xc8 use rguide/manual is severely lacking in that respect

key elements
PSECT strings,class=CODE,abs,delta=2
ORG 0x1f00

my example uses an asm segment in a c include file, it may be better to place the data in an asm file and include that instead
because i have terrible trouble getting "labels" to work properly my way. [ still learning]

mcc is a splendid thing once you get the hang of it, for the chips it supports.
once i have created the standalone project i use mcc to set the osc and create the main.c and mcc files
then you can add the pins/hw modules

**richard** · - 26th May 2018, 03:32

a saner way is, and let the linker locate the font for you

font .c file

Code:

#include <xc.h>
#asm
psect FONT_table,class=CODE,local,delta=2
  GLOBAL _FNT
_FNT
        DW 0x0000, 0x0000, 0x0000, 0x005F, 0x0000 //  32 ' '  '!'
        DW 0x0007, 0x0007, 0x0014, 0x3F94, 0x3F94 //  34 '"'  '#'
        DW 0x122A, 0x3FAA, 0x0923, 0x0988, 0x3262 //  36 '$'  '%'
        DW 0x1B49, 0x2AA2, 0x2800, 0x0283, 0x0000 //  38 '&'  '''
   ................

in main.c

extern const char FNT;
int addr=&FNT;

in wrChar()
unsigned int dat, inx = addr;
char i = 5;

**wjsmarine** · - 26th May 2018, 07:32

Hi Richard,

Well done to you and Mike for continuing the thread, even though what you are documenting is so far above my head I'm dizzy...

If I can jump in here I'd like to bring your attention to an undocumented feature of your Inc file I've just discovered when converting my previous code to run it. For various reasons, but mainly leading zero suppression, I insert a space but with your Inc file I get error messages e.g.

Code:

looper:
    LCDCLR
    bigtxt = 1     ; double size chrs
    LCDSTR 0,0,"Noki+12"
    LCDSTR 0,2,"345678@" 
    bigtxt = 0     ; normal size chrs
'    LCDSTR 52,3,"Demo"
    LCDSTR 0,4,"With@MSSP xfer" 
'    LCDSTR 0,5,"Dble Size Chrs"     
    LCDSTR 0,5," "  ; this doesn't compile - causes errors and warnings wherever used.     
'    LCDSTR 0,5,32   ; same result as above (worth a try).     
    PAUSE 1000       
    GOTO looper

resulting in
[ASM ERROR] NOKIA_DEMO PPS.ASM (1701) : Illegal character (0)
[ASM WARNING] NOKIA_DEMO PPS.ASM (1701) : Found label after column 1. (LCDSTR?CCC)

When you have the time may I ask for this to be corrected?

Kind regards,
Bill

**richard** · - 26th May 2018, 07:53

LCDSTR 0,5," "

its a pbp problem

" " is not a String pbp interprets a single chr as a byte , regardless of the quotes . and its not possible to fix it

you can simply use

LCDC " "
or
LCDC 0,5," "

to print a single character

have a look at this
http://support.melabs.com/forum/picb...strtok-usercmd
it has a rightjustify user command in it,

eg to display a 3 digit field

Code:

 arraywrite buff,[dec h,0]
    RJUSTBUFF  buff,3
    LCDSTR  36,0,BUFF

**Mike, K8LH** · - 26th May 2018, 08:12

Ah... Thank you for the PSECT search term. Got it. I also discovered that I could use a label in the font table and access that address in my code... Very exciting stuff (grin)...

I still need to double-check and simulate my XC8 version but so far it uses 381 words (141 code + 240 font). I didn't use MCC (Microchip Code Configurator) so it's a single file, about 235 lines, including the font table (see below).

MCC doesn't seem to support the MSSP module on my 16F1823 so I still need to consult the datasheet before I can implement the SPI driver.

Cheerful regards, Mike, K8LH

Code:

/************************************************************************
 *                                                                      *
 *  Project: Nokia_Fonts                                                *
 *   Source: Nokia_Main.c                                               *
 *   Author: Mike McLaren, K8LH                                         *
 *  (C)2013: Micro Application Consultants                              *
 *     Date: 25-May-2018                                                *
 *                                                                      *
 *   Experimental Nokia 5110 LCD display driver demo using a 96         *
 *   character packed 2.5-word-per-character 5x7 font table on a        *
 *   PIC16F1823.                                                        *
 *                                                                      *
 *      IDE: MPLABX v4.05                                               *
 *     Lang: XC8 v1.45, Lite/Free version                               *
 *                                                                      *
 ************************************************************************/

/* CONFIG1 */
  #pragma config FOSC = INTOSC  // INTOSC oscillator: I/O on CLKIN pin
  #pragma config WDTE = OFF     // Watchdog Timer Enable (WDT disabled)
  #pragma config PWRTE = OFF    // Power-up Timer Enable (PWRT disabled)
  #pragma config MCLRE = ON     // MCLR/VPP pin function is MCLR
  #pragma config CP = OFF       // Code protection is disabled
  #pragma config CPD = OFF      // Data memory code protection disabled
  #pragma config BOREN = ON     // Brown-out Reset Enable
  #pragma config CLKOUTEN = OFF // Clock Out Enable (off)
  #pragma config IESO = OFF     // Internal/External Switchover (off)
  #pragma config FCMEN = OFF    // Fail-Safe Clock Monitor Enable (off)

/* CONFIG2 */
  #pragma config WRT = OFF      // Write protection off
  #pragma config PLLEN = OFF    // PLL Enable (4x PLL disabled)
  #pragma config STVREN = ON    // Stack Overflow/Underflow Reset Enable
  #pragma config BORV = LO      // Brown-out Reset Low Trip Point
  #pragma config LVP = ON       // Low-Voltage Programming Enable


  #include <xc.h>

  #define _XTAL_FREQ 8000000

/************************************************************************
 *                                                                      *
 ************************************************************************/

   #define rst       RA0            // 5110 'reset'
   #define dat       RA1            // 5110 'din'
   #define clk       RA2            // 5110 'clk'
   #define ce        RC0            // 5110 'ce'
   #define dc        RC1            // 5110 'dc'

/************************************************************************
 *                                                                      *
 ************************************************************************/
   void putwreg()                   // send byte, msb first
   { char work;                     //
     asm("movwf putwreg@work ");    //
     ce = 0;                        // spi enable on
     for(char n=0; n<8; n++)        // 
     { clk = 0; dat = 0;            //  "
       if(work & 128) dat = 1;      //  "
       clk = 1; work <<= 1;         //  "
     }                              // 
     ce = 1;                        // spi enable off
   }                                //

/************************************************************************
 *                                                                      *
 ************************************************************************/
   void putcmd(char cmd)            // bank 0 (inserted by compiler)  |00
   { dc = 0;                        // command mode                   |00
     asm("call  _putwreg       ");  //                                |00
   }

/************************************************************************
 *                                                                      *
 ************************************************************************/
   void rdflash()                   //
   { asm("banksel EECON1       ");  // bank 3                         |03
     asm("bcf   EECON1,6       ");  // CFGS = 0 (not config)          |03
     asm("bsf   EECON1,7       ");  // EEPGD = 1 (program memory)     |03
     asm("bsf   EECON1,0       ");  // RD = 1 (initiate read)         |03
     asm("nop                  ");  // required nop                   |03
     asm("nop                  ");  //  "                             |03
     asm("incf  EEADRL,F       ");  // bump EEADR                     |03
     asm("rlf   EEDATL,W       ");  // move b7 into Carry             |03
     asm("rlf   EEDATH,W       ");  // wreg = the 7 bit hi byte       |03
     asm("bcf   EEDATL,7       ");  // eedatl = the 7 bit lo byte     |03
   }                                //

/************************************************************************
 *                                                                      *
 ************************************************************************/
   void wrchar(char ascii)          //
   { dc = 1;                        // set lcd 'data' mode            |00
     asm("movlw -32            ");  // ascii 32..127 minus offset     |00
     asm("addwf wrchar@ascii,F ");  // font array index, 0..95        |00
     asm("lsrf  wrchar@ascii,W ");  // int(ascii *= 2.5) -> 0..237    |00
     asm("addwf wrchar@ascii,W ");  //  "                             |00
     asm("addwf wrchar@ascii,W ");  //  "                             |00
     asm("movlb 3              ");  // bank 3                         |00
     asm("movwf EEADRL         ");  // flash address lo               |00
     asm("movlw Font5x7/256    ");  //                                |00
     asm("movwf EEADRH         ");  // flash address hi               |00
/*                                                                      *
 *   Extract five bytes of pattern data from three memory words. An     *
 *   even character uses word 0 hi + lo, 1 hi + lo, and 2 hi while      *
 *   odd characters use word 0 lo, 1 hi + lo, and 2 hi + lo.  A 6th     *
 *   blank (zero) byte is sent for inter-character spacing.             *
 *                                                                      */
     asm("call  _rdflash       ");  // read 1st word (2 bytes)        |03
     asm("banksel wrchar@ascii ");  // bank 0                         |00
     asm("btfss wrchar@ascii,0 ");  // odd char? yes, skip, else      |00
     asm("call  _putwreg       ");  // send hi byte (even character)  |00
     asm("banksel EEDATL       ");  // bank 3                         |03
     asm("movf  EEDATL,W       ");  //                                |03
     asm("call  _putwreg       ");  // send lo byte                   |00
     asm("call  _rdflash       ");  // read 2nd word (2 bytes)        |03
     asm("call  _putwreg       ");  // send hi byte                   |00
     asm("banksel EEDATL       ");  // bank 3                         |03
     asm("movf  EEDATL,W       ");  //                                |03
     asm("call  _putwreg       ");  // send lo byte                   |00
     asm("call  _rdflash       ");  // read 3rd word (2 bytes)        |03
     asm("call  _putwreg       ");  // send hi byte                   |00
     asm("banksel EEDATL       ");  // bank 3                         |03
     asm("movf  EEDATL,W       ");  //                                |03
     asm("banksel wrchar@ascii ");  // bank 0                         |00
     asm("btfsc wrchar@ascii,0 ");  // even char? yes, skip, else     |00
     asm("call  _putwreg       ");  // send lo byte (odd characters)  |00
     asm("movlw 0              ");  //                                |00
     asm("call  _putwreg       ");  // send blank 6th column          |00
   }

/************************************************************************
 *                                                                      *
 ************************************************************************/
   void putstr(const char *str)     // put 'ROM' strings
   { char n = 0;                    //
     while(str[n++])                //
     { asm("call _putwreg  ");      //
     }
   }

/************************************************************************
 *   main setup                                                         *
 ************************************************************************/
   void main(void)
   { ANSELA = 0;                    // Analog off (digital I/O)
     ANSELC = 0;                    //  "
     TRISA = 0;                     //
     TRISC = 0;                     //
     OSCCON = 0b01110000;           // set INTOSC to 8-MHz
/*                                                                      *
 *   initialize Nokia 5110 LCD display                                  *
 *                                                                      */
     __delay_ms(30);                //
     rst = 0; rst = 1;              // 5110 'reset' pulse
     putcmd(0x20+0x01);             // function set: ext instructions
     putcmd(0x80+0x30);             // set Vop (contrast), 0..127
     putcmd(0x04+0x02);             // set temperature coefficient, 0..3
     putcmd(0x10+0x03);             // Set bias system, 0..7
     putcmd(0x20+0x00);             // function set: std instructions
     putcmd(0x08+0x04);             // display control: normal mode
/*                                                                      *
 *   test the lcd print functions                                       *
 *                                                                      */
     putcmd(0x80+0x20);             // set DDRAM X address, 0..83
     putcmd(0x40+0x02);             // set DDRAM Y address, 0..5
     wrchar('R');                   //
     putstr("eady");                //

/************************************************************************
 *   main loop                                                          *
 ************************************************************************/
     while(1)
     {                              //
     }                              //
   }                                //

/************************************************************************
 *   Packed 96 character 5x7 Font, 2.5-words-per-character, 240 words   *
 ************************************************************************/
   #asm
   PSECT myFonts, class=CODE, abs, space=0, delta=2
     ORG 700h
   Font5x7:
     dw 0x0000, 0x0000, 0x0000, 0x005F, 0x0000     ;  32 ' '  '!'
     dw 0x0007, 0x0007, 0x0014, 0x3F94, 0x3F94     ;  34 '"'  '#'
     dw 0x122A, 0x3FAA, 0x0923, 0x0988, 0x3262     ;  36 '$'  '%'
     dw 0x1B49, 0x2AA2, 0x2800, 0x0283, 0x0000     ;  38 '&'  '''
     dw 0x001C, 0x1141, 0x0000, 0x20A2, 0x0E00     ;  40 '('  ')'
     dw 0x0A08, 0x1F08, 0x0A08, 0x043E, 0x0408     ;  42 '*'  '+'
     dw 0x0050, 0x1800, 0x0008, 0x0408, 0x0408     ;  44 ','  '-'
     dw 0x0060, 0x3000, 0x0020, 0x0808, 0x0202     ;  46 '.'  '/'
     dw 0x1F51, 0x24C5, 0x1F00, 0x217F, 0x2000     ;  48 '0'  '1'
     dw 0x2161, 0x28C9, 0x2321, 0x20C5, 0x25B1     ;  50 '2'  '3'
     dw 0x0C14, 0x097F, 0x0827, 0x22C5, 0x22B9     ;  52 '4'  '5'
     dw 0x1E4A, 0x24C9, 0x1801, 0x3889, 0x0283     ;  54 '6'  '7'
     dw 0x1B49, 0x24C9, 0x1B06, 0x24C9, 0x149E     ;  56 '8'  '9'
     dw 0x0036, 0x1B00, 0x0000, 0x2B36, 0x0000     ;  58 ':'  ';'
     dw 0x0414, 0x1141, 0x0014, 0x0A14, 0x0A14     ;  60 '<'  '='
     dw 0x0041, 0x1114, 0x0402, 0x00D1, 0x0486     ;  62 '>'  '?'
     dw 0x1949, 0x3CC1, 0x1F7E, 0x0891, 0x08FE     ;  64 '@'  'A'
     dw 0x3FC9, 0x24C9, 0x1B3E, 0x20C1, 0x20A2     ;  66 'B'  'C'
     dw 0x3FC1, 0x20A2, 0x0E7F, 0x24C9, 0x24C1     ;  68 'D'  'E'
     dw 0x3F89, 0x0489, 0x00BE, 0x20C9, 0x24FA     ;  70 'F'  'G'
     dw 0x3F88, 0x0408, 0x3F80, 0x20FF, 0x2080     ;  72 'H'  'I'
     dw 0x1040, 0x20BF, 0x00FF, 0x0414, 0x1141     ;  74 'J'  'K'
     dw 0x3FC0, 0x2040, 0x207F, 0x010C, 0x017F     ;  76 'L'  'M'
     dw 0x3F84, 0x0410, 0x3FBE, 0x20C1, 0x20BE     ;  78 'N'  'O'
     dw 0x3F89, 0x0489, 0x033E, 0x20D1, 0x10DE     ;  80 'P'  'Q'
     dw 0x3F89, 0x0CA9, 0x2346, 0x24C9, 0x24B1     ;  82 'R'  'S'
     dw 0x0081, 0x3F81, 0x00BF, 0x2040, 0x203F     ;  84 'T'  'U'
     dw 0x0FA0, 0x2020, 0x0FBF, 0x2038, 0x203F     ;  86 'V'  'W'
     dw 0x3194, 0x0414, 0x3187, 0x0470, 0x0407     ;  88 'X'  'Y'
     dw 0x30D1, 0x24C5, 0x2180, 0x3FC1, 0x2080     ;  90 'Z'  '['
     dw 0x0104, 0x0410, 0x1000, 0x20C1, 0x3F80     ;  92 '\'  ']'
     dw 0x0202, 0x0082, 0x0240, 0x2040, 0x2040     ;  94 '^'  '_'
     dw 0x0001, 0x0104, 0x0020, 0x2A54, 0x2A78     ;  96 '`'  'a'
     dw 0x3FC8, 0x2244, 0x1C38, 0x2244, 0x2220     ;  98 'b'  'c'
     dw 0x1C44, 0x2248, 0x3FB8, 0x2A54, 0x2A18     ; 100 'd'  'e'
     dw 0x047E, 0x0481, 0x010C, 0x2952, 0x293E     ; 102 'f'  'g'
     dw 0x3F88, 0x0204, 0x3C00, 0x227D, 0x2000     ; 104 'h'  'i'
     dw 0x1040, 0x223D, 0x007F, 0x0828, 0x2200     ; 106 'j'  'k'
     dw 0x0041, 0x3FC0, 0x007C, 0x0218, 0x0278     ; 108 'l'  'm'
     dw 0x3E08, 0x0204, 0x3C38, 0x2244, 0x2238     ; 110 'n'  'o'
     dw 0x3E14, 0x0A14, 0x0408, 0x0A14, 0x0C7C     ; 112 'p'  'q'
     dw 0x3E08, 0x0204, 0x0448, 0x2A54, 0x2A20     ; 114 'r'  's'
     dw 0x023F, 0x2240, 0x103C, 0x2040, 0x107C     ; 116 't'  'u'
     dw 0x0E20, 0x2020, 0x0E3C, 0x2030, 0x203C     ; 118 'v'  'w'
     dw 0x2228, 0x0828, 0x220C, 0x2850, 0x283C     ; 120 'x'  'y'
     dw 0x2264, 0x2A4C, 0x2200, 0x0436, 0x2080     ; 122 'z'  '{'
     dw 0x0000, 0x3F80, 0x0000, 0x20B6, 0x0400     ; 124 '|'  '}'
     dw 0x0808, 0x0410, 0x0478, 0x2341, 0x2378     ; 126 '~'  ''
   #endasm
/************************************************************************/

**richard** · - 26th May 2018, 11:39

mike

mssp is pretty easy

SSP1CON1=0x21 ;$22,21,20 all work @32mhz 20 is fastest
SSP1STAT=0x40
sdo and sck pins set to dig o/p

to transfer data
PIR1.3=0
SSP1BUF = data
WHILE (!PIR1.3) ;

tried your code on 16f1847 ,its not working

**Mike, K8LH** · - 26th May 2018, 15:27

It seems XC8 is placing my program code on top of my font table in the 0700h area of memory. More detective work (sigh)...

Thanks for the MSSP/SPI info, Richard. I will get to that after tracking down the current problem...

Mike

<added>

If you get a chance, add the "ovrld" param' to the following line and tell me if that fixes the problem, please?

Code:

   PSECT myFonts, class=CODE, abs, ovrld, space=0, delta=2
                                   ^^^^^

**richard** · - 26th May 2018, 16:47

ovrld,

does not fix it
even local too

there is more wrong than just that , the putwreg function is getting called six times for the wrchar
and only 5 times for the entire putstr call
its a total bitch to debug with all that inline asm , the debugger just
goes stupid

putcmd looks fine on the logic analyser , it all goes pear shaped from then on

**Mike, K8LH** · - 26th May 2018, 19:01

Sorry, Richard (and gang). A bug at the very top of the putchar() routine was messing up the font table address. And yes, I know assembler is a PITA... I wish I could get a gratis copy of PBP...

Corrected version attached (375 words total). I still need to dig out my old Nokia 5110 display and test this on real hardware. I also have a tiny 128x32 I2C OLED display and a tiny 128x64 SPI OLED display to play with sometime soon.

Cheerful regards, Mike

Nokia_Main.c.txt

**richard** · - 27th May 2018, 00:09

putstr still not working

I think it should look like this, but it only works for the first call
so I get "Re and then garbage

Code:

 void putstr(const char *str)     // put 'ROM' strings
   {                     //
     while(*str) 
       wrchar(*str++);
   }                                //

**richard** · - 27th May 2018, 03:08

more oddly

strcpy(buff,"eady");

putstr(buff);

works with my modified routine

putstr("eady");
crashes the show

**richard** · - 27th May 2018, 03:25

Code:

void wrchar(char d)          //
   { 
     volatile char ascii=d;

fixed it, compiler optimised ascii var out

**Mike, K8LH** · - 27th May 2018, 03:31

Yes, your putstr() routine is better...

While debugging I've found XC8 is using the same memory location for local variables in both the wrchar() and putstr() functions. The wrchar@ascii variable is using 70h and the putstr@str pointer is using 70h and 71h. Is this a result of my heavy use of assembly code? That is, XC8 doesn't realize those local variables need to be unique? How do I get XC8 to use unique memory locations for those local variables?

**richard** · - 27th May 2018, 03:39

make them static

**richard** · - 27th May 2018, 04:57

I think I prefer my take on this
since:-
the font is automatically located
the pin/hw defines are in mcc ,therefore its simple to port to any chip that can read its own flash
its easy to debug
bigtext and inverted text are easily implemented
its only 100 or so words bigger

Code:

/**
 
        Product Revision  :  PIC10 / PIC12 / PIC16 / PIC18 MCUs - 1.65.2
        Device            :  PIC16F1847
        Driver Version    :  2.00
 * font.c included via ide source files
 */
#include "mcc_generated_files/mcc.h"
void putwreg(char work);
void putcmd(char x);
void WrChar(char );
void WrStr(const char *);
extern const char FNT;
void main(void) {
    // initialize the device
    SYSTEM_Initialize();
    /*                                                                   *
     *  initialize Nokia 5110 LCD display                                *
     *                                                                   */
    __delay_ms(30); //
    LCD_RST_SetLow(); // 5110 'reset' pulse
    __delay_ms(1);
    LCD_RST_SetHigh(); // 5110 'reset' pulse
    __delay_ms(1);
    putcmd(0x20 + 0x01); // function set: extended instructions
    putcmd(0xc8); // set Vop (contrast), 0..127
    putcmd(0x04 + 0x02); // set temperature coefficient, 0..3
    putcmd(0x10 + 0x03); // Set bias system, 0..7
    putcmd(0x20 + 0x00); // function set: standard instructions
    putcmd(0x08 + 0x04); // display control: normal mode
    putcmd(0x80 + 0x20); // set DDRAM X address, 0..83
    putcmd(0x40 + 0x02); // set DDRAM Y address, 0..5
    WrChar('R'); // write ascii character
    WrStr("eady");
    while (1) {
    }
}
/**
 End of File
 */
 
void putwreg(char work) // send byte, msb first (15 words)
{
    LCD_CE_LAT = 0; // spi enable on
    SPI1_Exchange8bit(work);
    while (!PIR1bits.SSP1IF);
    LCD_CE_LAT = 1; // spi enable off
} //
void WrChar(char d) { // for packed 2.5 word 5x7 font
    uint16_t tmp, inx = (uint16_t) & FNT;
    char fd[6], j = 0, k = 3, *pt;
    inx += ((uint16_t) (d - 32)*5) >> 1;
    while (k--) {
        tmp = FLASH_ReadWord(inx++);
        fd[j + 1] = tmp & 0x7f;
        tmp <<= 1;
        fd[j] = tmp >> 8;
        j += 2;
    }
    pt = fd;
    if ((d & 1))pt++;
    k = 5;
    // with font now stored in bufer fd its easy to have large and/or inverted text
    while (k--) {
        putwreg(*pt++);
    }
    putwreg(0);
}
void putcmd(char x) {
    LCD_DC_SetLow();
    putwreg(x);
    LCD_DC_SetHigh();
}
void WrStr(const char *buff) {
    { //
        while (*buff)
            WrChar(*buff++); //
    }
}

font.c

Code:

#include <xc.h>
#asm
psect FONT_table,class=CODE,local,delta=2
  GLOBAL _FNT
_FNT
        DW 0x0000, 0x0000, 0x0000, 0x005F, 0x0000 //  32 ' '  '!'
        DW 0x0007, 0x0007, 0x0014, 0x3F94, 0x3F94 //  34 '"'  '#'
        DW 0x122A, 0x3FAA, 0x0923, 0x0988, 0x3262 //  36 '$'  '%'
        DW 0x1B49, 0x2AA2, 0x2800, 0x0283, 0x0000 //  38 '&'  '''
        DW 0x001C, 0x1141, 0x0000, 0x20A2, 0x0E00 //  40 '('  ')'
        DW 0x0A08, 0x1F08, 0x0A08, 0x043E, 0x0408 //  42 '*'  '+'
        DW 0x0050, 0x1800, 0x0008, 0x0408, 0x0408 //  44 ','  '-'
        DW 0x0060, 0x3000, 0x0020, 0x0808, 0x0202 //  46 '.'  '/'
        DW 0x1F51, 0x24C5, 0x1F00, 0x217F, 0x2000 //  48 '0'  '1'
        DW 0x2161, 0x28C9, 0x2321, 0x20C5, 0x25B1 //  50 '2'  '3'
        DW 0x0C14, 0x097F, 0x0827, 0x22C5, 0x22B9 //  52 '4'  '5'
        DW 0x1E4A, 0x24C9, 0x1801, 0x3889, 0x0283 //  54 '6'  '7'
        DW 0x1B49, 0x24C9, 0x1B06, 0x24C9, 0x149E //  56 '8'  '9'
        DW 0x0036, 0x1B00, 0x0000, 0x2B36, 0x0000 //  58 ':'  ';'
        DW 0x0414, 0x1141, 0x0014, 0x0A14, 0x0A14 //  60 '<'  '='
        DW 0x0041, 0x1114, 0x0402, 0x00D1, 0x0486 //  62 '>'  '?'  
        DW 0x1949, 0x3CC1, 0x1F7E, 0x0891, 0x08FE //  64 '@'  'A'
        DW 0x3FC9, 0x24C9, 0x1B3E, 0x20C1, 0x20A2 //  66 'B'  'C'
        DW 0x3FC1, 0x20A2, 0x0E7F, 0x24C9, 0x24C1 //  68 'D'  'E'
        DW 0x3F89, 0x0489, 0x00BE, 0x20C9, 0x24FA //  70 'F'  'G'
        DW 0x3F88, 0x0408, 0x3F80, 0x20FF, 0x2080 //  72 'H'  'I'
        DW 0x1040, 0x20BF, 0x00FF, 0x0414, 0x1141 //  74 'J'  'K'
        DW 0x3FC0, 0x2040, 0x207F, 0x010C, 0x017F //  76 'L'  'M'
        DW 0x3F84, 0x0410, 0x3FBE, 0x20C1, 0x20BE //  78 'N'  'O'
        DW 0x3F89, 0x0489, 0x033E, 0x20D1, 0x10DE //  80 'P'  'Q'
        DW 0x3F89, 0x0CA9, 0x2346, 0x24C9, 0x24B1 //  82 'R'  'S'
        DW 0x0081, 0x3F81, 0x00BF, 0x2040, 0x203F //  84 'T'  'U'
        DW 0x0FA0, 0x2020, 0x0FBF, 0x2038, 0x203F //  86 'V'  'W'
        DW 0x3194, 0x0414, 0x3187, 0x0470, 0x0407 //  88 'X'  'Y'
        DW 0x30D1, 0x24C5, 0x2180, 0x3FC1, 0x2080 //  90 'Z'  '['
        DW 0x0104, 0x0410, 0x1000, 0x20C1, 0x3F80 //  92 '\'  ']'
        DW 0x0202, 0x0082, 0x0240, 0x2040, 0x2040 //  94 '^'  '_'
        DW 0x0001, 0x0104, 0x0020, 0x2A54, 0x2A78 //  96 '`'  'a'
        DW 0x3FC8, 0x2244, 0x1C38, 0x2244, 0x2220 //  98 'b'  'c'
        DW 0x1C44, 0x2248, 0x3FB8, 0x2A54, 0x2A18 // 100 'd'  'e'
        DW 0x047E, 0x0481, 0x010C, 0x2952, 0x293E // 102 'f'  'g'
        DW 0x3F88, 0x0204, 0x3C00, 0x227D, 0x2000 // 104 'h'  'i'
        DW 0x1040, 0x223D, 0x007F, 0x0828, 0x2200 // 106 'j'  'k'
        DW 0x0041, 0x3FC0, 0x007C, 0x0218, 0x0278 // 108 'l'  'm'
        DW 0x3E08, 0x0204, 0x3C38, 0x2244, 0x2238 // 110 'n'  'o'
        DW 0x3E14, 0x0A14, 0x0408, 0x0A14, 0x0C7C // 112 'p'  'q'
        DW 0x3E08, 0x0204, 0x0448, 0x2A54, 0x2A20 // 114 'r'  's'
        DW 0x023F, 0x2240, 0x103C, 0x2040, 0x107C // 116 't'  'u'
        DW 0x0E20, 0x2020, 0x0E3C, 0x2030, 0x203C // 118 'v'  'w'
        DW 0x2228, 0x0828, 0x220C, 0x2850, 0x283C // 120 'x'  'y'
        DW 0x2264, 0x2A4C, 0x2200, 0x0436, 0x2080 // 122 'z'  '{'
        DW 0x0000, 0x3F80, 0x0000, 0x20B6, 0x0400 // 124 '|'  '}'
        DW 0x0808, 0x0410, 0x0478, 0x2341, 0x2378 // 126 '~'  ''
#endasm

**richard** · - 27th May 2018, 05:04

tried a pbp version for the 5 byte compressed packed font, the unpacking done without asm
takes more code space than the compressing saves

inc file

Code:

'****************************************************************
'*  Name    : NOKIA_ds5.INC                                     *
'*  Author  : richard                                           *
'*  Notice  :                                                   *
'*          :                                                   *
'*  Date    : 26/05/2018                                        *
'*  Version : 1.0b mssp1 version  bigtxt                        *
'*  Notes   :  inverse text  mike 5 byte font version           *
'*          :FOR pic 16/18       NOKIA LCD                      *
'****************************************************************
 
 goto overglcd
;##################################################################
; adjust these definitions to suit and  place in main prg

'#DEFINE PIC16 1  ;IF PIC18 NOT USED
'#define use_mssp 1  ;if mssp used DON'T FORGET to set sdo and sck pins as o/p's
' lcdheight con 5      ;  6 PAGES  
' lcdwidth  con 84     ; 84 PIXELS WIDE
 ;--------------ONLY IF MSSP NOT USED---------------
' LCD_CLK  var     Portb.4       '  Clock
' LCD_DIN  var     Portb.2       ' Data
;-----------------------------------------
' LCD_RST  var    PortA.4 
' LCD_DC   var    PortA.3
' LCD_CE   var    LATA.6
' LCD_LIGHT   var PortA.0 
;##################################################################
 USERCOMMAND "LCDC"     ;X,Y,CHR  0 <  X < 84  ,   0 <  Y < 7    31 < CHR > 127  
 USERCOMMAND "LCDCLR"   ;clear LCD   
 USERCOMMAND "LCDSTR"   ;STRING @ X,Y  or   Constant String
 USERCOMMAND "LCDCMD"   ;cmd BYTE TO LCD 
 USERCOMMAND "LCDDAT"   ;DATA BYTE TO LCD

 ASM  
  ;----[const String]---------------------------------------------------------------
LCDSTR?CCS  macro Xin ,Yin,Cin 
 IFNDEF  TBLPTRL
    local TheString, OverStr ; define local labels so you can call macro multiple times
    goto OverStr ; goto over string stored in FLASH, so processor can't execute that
TheString ;label to get address of your string
    da Cin, 0 ;add string to flash at TheString address and end string with 0
OverStr
    MOVE?CW  TheString, _glcd_bigaddress
    MOVE?CB Xin , _POSX
    MOVE?CB Yin , _POSY
    L?CALL  _GlcdUnpackStr
 ELSE  
    local TheString, OverStr ; define local labels so you can call macro multiple times
    goto OverStr ; goto over string stored in FLASH, so processor can't execute that
TheString ;label to get address of your string
    data Cin, 0 ;add string to flash at TheString address and end string with 0
OverStr
    movlw   UPPER TheString
    movwf   TBLPTRU
    movlw   HIGH TheString 
    movwf   TBLPTRH
    movlw   LOW TheString
    movwf   TBLPTRL
    MOVE?CB Xin , _POSX
    MOVE?CB Yin , _POSY
    L?CALL  GLCD_Cstr_out 
 ENDIF     
    endm  

 ;----------------------Strings------------------------------------
LCDSTR?CBB  macro Xin ,Yin ,Bin
    MOVE?CB Xin , _POSX
    MOVE?BB Yin , _POSY
    MOVE?CB high Bin, FSR1H ;load highbyte 
    MOVE?CB low  Bin, FSR1L ;load low byte
    L?CALL  GLCD_str_out
    endm         
LCDSTR?CCB  macro Xin ,Yin ,Bin
    MOVE?CB Xin , _POSX
    MOVE?CB Yin  ,_POSY
    MOVE?CB high (Bin), FSR1H ;load highbyte 
    MOVE?CB low  (Bin), FSR1L ;load low byte
    L?CALL  GLCD_str_out
    endm              
LCDSTR?BBB  macro Xin ,Yin ,Bin
    MOVE?B  Xin, _POSX
    MOVE?B  Yin, _POSY
    MOVE?CB high Bin, FSR1H ;load highbyte 
    MOVE?CB low  Bin, FSR1L ;load low byte
    L?CALL  GLCD_str_out
    endm 
LCDSTR?WBB  macro Xin ,Yin ,Bin
    MOVE?WB Xin, _POSX
    MOVE?BB Yin, _POSY
    MOVE?CB high Bin, FSR1H ;load highbyte 
    MOVE?CB low  Bin, FSR1L ;load low byte
    L?CALL  GLCD_str_out
    endm  
LCDSTR?WWB  macro Xin ,Yin ,Bin
    MOVE?WB Xin, _POSX
    MOVE?WB Yin, _POSY
    MOVE?CB high Bin, FSR1H ;load highbyte 
    MOVE?CB low  Bin, FSR1L ;load low byte
    L?CALL  GLCD_str_out
    endm 
 
 
LCDCMD?C  macro Cin
    MOVE?CT 0,_LCD_DC
    MOVE?CB  Cin , _lcdData
    L?CALL   _lcd_byte
   endm 
LCDCMD?B  macro Cin
    MOVE?CT 0,_LCD_DC
    MOVE?BB  Cin , _lcdData
    L?CALL   _lcd_byte
   endm 
LCDCMD?W  macro Cin
    MOVE?CT 0,_LCD_DC
    MOVE?WB  Cin , _lcdData
    L?CALL   _lcd_byte
   endm   
   
   
LCDDAT?C  macro Cin    
    MOVE?CT 1,_LCD_DC
    MOVE?CB  Cin , _lcdData
    L?CALL   _lcd_byte
   endm 
LCDDAT?B  macro Cin 
    MOVE?CT 1,_LCD_DC   
    MOVE?BB  Cin , _lcdData
    L?CALL   _lcd_byte
   endm    
LCDDAT?W  macro Cin   
    MOVE?CT 1,_LCD_DC 
    MOVE?WB  Cin , _lcdData
    L?CALL   _lcd_byte
   endm    

LCDCLR? macro
    L?CALL   _lcd_clr
   endm 


       
 ;----------------------Character @ X,Y ------------------------------------        
LCDC?BBB  macro Xin ,Yin , Bin
    MOVE?BB  Xin, _POSX 
    MOVE?BB  Yin, _POSY 
    MOVE?BB  Bin, _glcdCh
    L?CALL   _gcga
    endm    
LCDC?WBB  macro Xin ,Yin , Bin
    MOVE?WB  Xin, _POSX 
    MOVE?BB  Yin, _POSY 
    MOVE?BB  Bin, _glcdCh
    L?CALL   _gcga
    endm  
LCDC?WWB  macro Xin ,Yin , Bin
    MOVE?WB  Xin, _POSX 
    MOVE?WB  Yin, _POSY 
    MOVE?BB  Bin, _glcdCh
    L?CALL  _gcga
    endm    
        
LCDC?BBC  macro Xin ,Yin , Cin
    MOVE?BB  Xin, _POSX 
    MOVE?BB  Yin, _POSY 
    MOVE?CB  Cin ,_glcdCh
    L?CALL   _gcga
    endm   
LCDC?WBC  macro Xin ,Yin , Cin
    MOVE?WB  Xin, _POSX 
    MOVE?BB  Yin, _POSY 
    MOVE?CB  Cin ,_glcdCh
    L?CALL   _gcga
    endm
LCDC?CCC  macro Xin ,Yin ,Cin
    MOVE?CB  Xin ,   _POSX 
    MOVE?CB  Yin,    _POSY 
    MOVE?CB  Cin,   _glcdCh
    L?CALL   _gcga 
    endm   
LCDC?CCB  macro Xin ,Yin ,Bin
    MOVE?CB  Xin ,  _POSX 
    MOVE?CB  Yin,    _POSY 
    MOVE?BB  Bin, _glcdCh
    L?CALL   _gcga 
    endm  
LCDC?B  macro Bin    
    MOVE?BB  Bin, _glcdCh
    L?CALL   _gcga 
    endm  

    
   
GLetAddress macro Label, Wout
    CHK?RP Wout
    movlw low Label          ; get low byte
    movwf Wout
    movlw High Label         ; get high byte
    movwf Wout + 1  
    BANKSEL 0
    endm 
 IFDEF    TBLPTRL 
GLCD_Cstr_out
    tblrd   *+
    movf   TABLAT,w
    bz	GLCD_exit_Cstr_out  ; EXIT ON Null char 
    CHK?RP  _glcdCh 
    MOVWF   _glcdCh 
    CHK?RP  _glcd_bigaddress
    movff   TBLPTRU,_glcd_bigaddress
    movff   TBLPTRH,_glcd_bigaddress+1
    movff   TBLPTRL,_glcd_bigaddress+2
    L?CALL  _gcga
    CHK?RP  _glcd_bigaddress
    movff   _glcd_bigaddress   ,TBLPTRU
    movff   _glcd_bigaddress+1 ,TBLPTRH
    movff   _glcd_bigaddress+2 ,TBLPTRL
    bra     GLCD_Cstr_out        
GLCD_exit_Cstr_out
    BANKSEL 0
    return 
     

      
GLCD_str_out
    movf POSTINC1, W	; Get a character
    bz	GLCD_exit_strout  ; EXIT ON Null char 
    CHK?RP  _glcdCh 
    MOVWF _glcdCh
    BANKSEL 0
    L?CALL _gcga  
    bra    GLCD_str_out        
GLCD_exit_strout
    BANKSEL 0
    return    
ELSE 
GLCD_str_out
    IFDEF BSR
        MOVIW FSR1++	; Get a character
        BTFSC STATUS,Z
        BRA	GLCD_exit_strout  ; EXIT ON Null char 
    ELSE
        movf INDF, W	; Get a character
       BTFSC STATUS,Z
        GOTO	GLCD_exit_strout  ; EXIT ON Null char 
        INCF FSR,F 
    ENDIF
    CHK?RP  _glcdCh 
    MOVWF _glcdCh
    MOVE?BB FSR1L,_glcd_bigaddress
    MOVE?BB FSR1H,_glcd_bigaddress+1
    BANKSEL 0
    L?CALL _gcga 
    MOVE?BB _glcd_bigaddress,FSR1L
    MOVE?BB _glcd_bigaddress+1,FSR1H
    GOTO  GLCD_str_out      
GLCD_exit_strout
    BANKSEL 0
    return     
 ENDIF 
endasm
 
    glcd_bigaddress  VAR BYTE[3]
    glcdCh      var byte  'chr  DATA
    lcdData     VAR byte  'DATA
    glcdDC      VAR BYTE  'gca  var
    glcdFont    var word  'font address
    glcdOffset  VAR word  'font offset
    dsfbuff var byte[26]
    ctemp1 var word
    gl var byte
    glcdBc   var byte
    POSY        var byte  'gca  pg   address
    gy_         var byte  'gca  pg   address
    POSX        var byte  'gca  row  address
    gx_         var byte  'gca  row  address
    ctemp       var word
    glcdStrAddr var word ext
    bigtxt       var bit
    inverted      var bit
@glcdStrAddr =   _glcd_bigaddress 


    
GlcdUnpackStr:     
    readcode glcdStrAddr,CTEMP
    glcd_bigaddress[2]  = CTEMP&$7f
    ctemp=ctemp<<1
    glcdCh = CTEMP.HIGHBYTE 
    glcdStrAddr=glcdStrAddr+1
    if   glcdCh then 
        gosub gcga
        glcdCh =  glcd_bigaddress[2]
    else
        return
    endif
    if   glcdCh then 
      gosub gcga
    else
        return
    endif
    goto   GlcdUnpackStr:     
return   
 
lcd_init:
    @ GLetAddress _font7x5,_glcdFont
    bigtxt = 0
    inverted =0
    #ifdef use_mssp 
    SSP1CON1=$21  ;$22,21,20 all work @32mhz  20 is fastest 
    SSP1STAT=$40
    #endif
    LCD_CE=1 
    pause 30 
    Lcd_RST = 0         ' Reset LCD (HW reset)
    pause 1
    Lcd_RST = 1         ' Release Reset
'    lcd_dc=0
    LCDCMD   $21        ' LCD EXTENDED COMMANDS
    LCDCMD   $c8        ' SET LCD Vop (CONTRAST) initial value $C8 = 200.
    LCDCMD   $06        ' SET TEMP COEFFICIENT
    LCDCMD   $13        ' LCD BIAS MODE
    LCDCMD   $20        ' LCD STANDARD COMMANDS
    LCDCMD   $08        ' LCD blank
    LCDCMD   $0c        ' LCD IN NORMAL MODE
return 
    
lcd_clr:    ' clear
      FOR  gy_ =0 TO 5          
          FOR GX_=0 TO 83
             LCDDAT  0
          NEXT
      NEXT     
return


lcd_byte:  'send command sequence "glcdData "
LCD_CE=0
#ifdef use_mssp
    PIR1.3=0     
    SSP1BUF = LcdData 
    WHILE   !PIR1.3 :    wend 
#else
    PAUSEUS 150
    SHiftOUT LCD_DIN,LCD_CLK,1,[LcdData]  
#endif  
LCD_CE=1 
return 



LCDxy:    ;set LCD XY  
   POSY = POSY MIN lcdheight 
   POSX = POSX MIN lcdwidth
   LCDCMD POSY|$40
   LCDCMD POSX|$80
return
    


gcga:      ;unpack font from flash and display it
    #ifdef PIC16
        glcdOffset = (glcdch-32)*5/2 + glcdFont  ; point to cga data
    #ELSE
        glcdOffset = (glcdch-32)*6 + glcdFont  ; point to cga data
    #ENDIF
   gosub LCDxy
#ifdef PIC16
'     ; COMMENT OUT THIS ASM SECTION IF CHIP HAS NO EEDAT REG
'    ASM
'    MOVE?CB high _dsfbuff, FSR1H ;load highbyte 
'    MOVE?CB low  _dsfbuff, FSR1L ;load low byte
'    MOVE?WW    _glcdOffset,EEADRL
'    MOVE?CB    3,_glcdDC
'nxtf   
'    BANKSEL   EECON1 
'    BSF EECON1, EEPGD ;Point to PROGRAM memory
'    BSF EECON1, RD ;EE Read
'    NOP
'    NOP 
'    RLF    EEDAT, W 
'    RLF    EEDATH, W
'    MOVE?AB  _glcdBc
'    BANKSEL   EEDAT
'    BCF    EEDAT,7
'    MOVF   EEDAT,W
'    MOVWI FSR1++
'    MOVE?BA   _glcdBc
'    MOVWI FSR1++
'    BANKSEL   EEADRL
'    incf    EEADRL,F      
'    btfsc   STATUS,Z      
'    incf    EEADRH,F 
'    BANKSEL  _glcdDC
'    DECFSZ  _glcdDC,F                ;dec count 
'    GOTO    nxtf
'    BANKSEL 0
'    ENDASM
    ; UNCOMMENT IF CHIP HAS NO EEDAT REG
    glcdBc=0
    gosub getflash 
    if !glcdch.0 then 
        dsfbuff[glcdBc] = CTEMP.HIGHBYTE  
        glcdBc=glcdBc+1
    endif        
    dsfbuff[glcdBc] = glcdDC
    glcdBc=glcdBc+1     
    gosub getflash 
    dsfbuff[glcdBc] = CTEMP.HIGHBYTE 
    glcdBc=glcdBc+1
    dsfbuff[glcdBc] = glcdDC 
    glcdBc=glcdBc+1
    gosub getflash 
    dsfbuff[glcdBc] = CTEMP.HIGHBYTE   
    if glcdch.0 then  
        glcdBc=glcdBc+1
        dsfbuff[glcdBc] = glcdDC
    endif
    dsfbuff[5] =  0
#else 
    for glcddc = 0 to 2
       dsfbuff[glcddc*2] = CTEMP
       dsfbuff[glcddc*2+1] = CTEMP.HIGHBYTE 
       glcdOffset     = glcdOffset + 2 
    NEXT
#endif
   if inverted then
   for glcddc = 5 to 0 STEP -1
      dsfbuff[glcddc]=~dsfbuff[glcddc]
   next   
   endif
   if bigtxt then ;create a big chr from a small one
       DSFBUFF[24] = POSX
       DSFBUFF[25] = POSy
       for glcddc = 5 to 0 STEP -1
           ctemp = 0
           ctemp1 = 3
           gL = dsfbuff[glcddc]
           for glcdBc = 0 to 7
               IF  GL & 1 THEN ctemp = ctemp|ctemp1
               ctemp1 = ctemp1<<2
               GL = GL>>1
           NEXT
           gL = glcddc*2
           dsfbuff[GL]   =ctemp.LOWBYTE
           dsfbuff[GL+1] =ctemp.LOWBYTE
           dsfbuff[GL+12]=ctemp.HIGHBYTE
           dsfbuff[GL+13]=ctemp.HIGHBYTE
       NEXT
       for   glcddc = 0 to 11
        LCDDAT   dsfbuff[GLCDDC]
       NEXT
       POSY=POSY+1
       POSX=DSFBUFF[24]
       gosub LCDxy
       for   glcddc = 12 to 23
        LCDDAT   dsfbuff[GLCDDC]
       NEXT
       POSx = POSX + 12 
       IF POSX > 72  THEN  POSX=0    ;wrap 
       posy=DSFBUFF[25]
   else
       for   glcddc = 0 to 5
        LCDDAT   dsfbuff[GLCDDC]
       NEXT
       POSx = POSX + 6      
       IF POSX > 78  THEN  POSX=0    ;wrap    
   endif
RETURN 

getflash:
        readcode glcdOffset,CTEMP
    glcdDC= CTEMP&$7f
    ctemp = ctemp << 1
     glcdOffset = glcdOffset + 1
     return
overglcd :

demo file

Code:

 '****************************************************************
'*  Name    : NOKIA_DEMO.PBP                                     *
'*  Author  : richard                                            *
'*  Notice  :                                                    *
'*          :                                                    *
'*  Date    : 16/5/2018                                          *
'*  Version :  mssp1 version  with bigtxt  ,inverse txt          *
'*  Notes   :  used mikes compressed packed 5 byte font          *
'*          :FOR pic 16F1847@32MHZ           NOKIA               *
'****************************************************************
#CONFIG ; 16FF1847.
        __config _CONFIG1, _FOSC_INTOSC & _WDTE_ON & _PWRTE_ON & _MCLRE_ON & _CP_OFF & _BOREN_OFF
        __config _CONFIG2, _PLLEN_OFF & _LVP_OFF
#ENDCONFIG
define      OSC         32

 
; --- *** Oscillator  *** ---------------------------------------------------
OSCCON = %11110000           ;32 MHz, 
ANSELb = 0
ANSELA = 0
TRISA=%10010000
TRISB=%11101011
 

 ;DEFINES FOR DISPLAY   use   font7x5_16.bas   or  font7x5_18.bas     for pic18
 #DEFINE PIC16 1            
 #define use_mssp 1
 lcdheight con 5      ;  6 PAGES   
 lcdwidth  con 83     ; 84 PIXELS WIDE
' LCD_CLK     var     LATB.4       ' SCK1     pin needs to be set as dig o/p
' LCD_DIN     var     LATB.2       ' SDO1     pin needs to be set as dig o/p
 LCD_RST     var     LATA.4 
 LCD_DC      var     LATA.3
 LCD_CE      var     LATA.6
 LCD_LIGHT   var     LATA.0
 

 
BUFF VAR BYTE [16]
char  VAR BYTE
Include "nokia_ds5.inc"  ' bring it in
include "font7x5_16_5.bas"

'==========================    MAIN  Routine    ==============================  
    gosub lcd_init
    LCDCLR
    ARRAYWRITE BUFF,["READY",0]
     inverted=1
    LCDSTR  5,2,BUFF 
    PAUSE 1000
    LCDCLR
    inverted=0
    bigtxt = 1
    LCDSTR  5,2,BUFF 
    PAUSE 1000
    LCDCLR
    
    bigtxt = 0
    posx=0
    posy=0
    gosub LCDxy
    char=32
looper:
    lcdc char
    while posx
    char=char+1
    if char>127 then char=32
    lcdc char
    PAUSE 100
    wend
    posy=posy+1
    if posy>5 then 
    posy=0 
    gosub LCDxy
    PAUSE 1000
    endif 
     
GOTO LOOPER   
 
'

END

font

Code:

'****************************************************************
'*  Name    : font7x5_16_5.BAS                                  *
'*  Author  : mike                                              *
'*  Notice  :                                                   *
'*          :                                                   *
'*  Date    :                                                   *
'*  Version : 1.0                                               *
'*  Notes   :                                                   *
'*          :                                                   *
'****************************************************************
goto overfont
font7x5:     ;14BIT   PACKED FORMAT   [2X7BITS]     CHR32-126 [SP TO ~ ]
asm
     dw 0x0000, 0x0000, 0x0000, 0x005F, 0x0000     ;  32 ' '  '!'
     dw 0x0007, 0x0007, 0x0014, 0x3F94, 0x3F94     ;  34 '"'  '#'
     dw 0x122A, 0x3FAA, 0x0923, 0x0988, 0x3262     ;  36 '$'  '%'
     dw 0x1B49, 0x2AA2, 0x2800, 0x0283, 0x0000     ;  38 '&'  '''
     dw 0x001C, 0x1141, 0x0000, 0x20A2, 0x0E00     ;  40 '('  ')'
     dw 0x0A08, 0x1F08, 0x0A08, 0x043E, 0x0408     ;  42 '*'  '+'
     dw 0x0050, 0x1800, 0x0008, 0x0408, 0x0408     ;  44 ','  '-'
     dw 0x0060, 0x3000, 0x0020, 0x0808, 0x0202     ;  46 '.'  '/'
     dw 0x1F51, 0x24C5, 0x1F00, 0x217F, 0x2000     ;  48 '0'  '1'
     dw 0x2161, 0x28C9, 0x2321, 0x20C5, 0x25B1     ;  50 '2'  '3'
     dw 0x0C14, 0x097F, 0x0827, 0x22C5, 0x22B9     ;  52 '4'  '5'
     dw 0x1E4A, 0x24C9, 0x1801, 0x3889, 0x0283     ;  54 '6'  '7'
     dw 0x1B49, 0x24C9, 0x1B06, 0x24C9, 0x149E     ;  56 '8'  '9'
     dw 0x0036, 0x1B00, 0x0000, 0x2B36, 0x0000     ;  58 ':'  ';'
     dw 0x0414, 0x1141, 0x0014, 0x0A14, 0x0A14     ;  60 '<'  '='
     dw 0x0041, 0x1114, 0x0402, 0x00D1, 0x0486     ;  62 '>'  '?'
     dw 0x1949, 0x3CC1, 0x1F7E, 0x0891, 0x08FE     ;  64 '@'  'A'
     dw 0x3FC9, 0x24C9, 0x1B3E, 0x20C1, 0x20A2     ;  66 'B'  'C'
     dw 0x3FC1, 0x20A2, 0x0E7F, 0x24C9, 0x24C1     ;  68 'D'  'E'
     dw 0x3F89, 0x0489, 0x00BE, 0x20C9, 0x24FA     ;  70 'F'  'G'
     dw 0x3F88, 0x0408, 0x3F80, 0x20FF, 0x2080     ;  72 'H'  'I'
     dw 0x1040, 0x20BF, 0x00FF, 0x0414, 0x1141     ;  74 'J'  'K'
     dw 0x3FC0, 0x2040, 0x207F, 0x010C, 0x017F     ;  76 'L'  'M'
     dw 0x3F84, 0x0410, 0x3FBE, 0x20C1, 0x20BE     ;  78 'N'  'O'
     dw 0x3F89, 0x0489, 0x033E, 0x20D1, 0x10DE     ;  80 'P'  'Q'
     dw 0x3F89, 0x0CA9, 0x2346, 0x24C9, 0x24B1     ;  82 'R'  'S'
     dw 0x0081, 0x3F81, 0x00BF, 0x2040, 0x203F     ;  84 'T'  'U'
     dw 0x0FA0, 0x2020, 0x0FBF, 0x2038, 0x203F     ;  86 'V'  'W'
     dw 0x3194, 0x0414, 0x3187, 0x0470, 0x0407     ;  88 'X'  'Y'
     dw 0x30D1, 0x24C5, 0x2180, 0x3FC1, 0x2080     ;  90 'Z'  '['
     dw 0x0104, 0x0410, 0x1000, 0x20C1, 0x3F80     ;  92 '\'  ']'
     dw 0x0202, 0x0082, 0x0240, 0x2040, 0x2040     ;  94 '^'  '_'
     dw 0x0001, 0x0104, 0x0020, 0x2A54, 0x2A78     ;  96 '`'  'a'
     dw 0x3FC8, 0x2244, 0x1C38, 0x2244, 0x2220     ;  98 'b'  'c'
     dw 0x1C44, 0x2248, 0x3FB8, 0x2A54, 0x2A18     ; 100 'd'  'e'
     dw 0x047E, 0x0481, 0x010C, 0x2952, 0x293E     ; 102 'f'  'g'
     dw 0x3F88, 0x0204, 0x3C00, 0x227D, 0x2000     ; 104 'h'  'i'
     dw 0x1040, 0x223D, 0x007F, 0x0828, 0x2200     ; 106 'j'  'k'
     dw 0x0041, 0x3FC0, 0x007C, 0x0218, 0x0278     ; 108 'l'  'm'
     dw 0x3E08, 0x0204, 0x3C38, 0x2244, 0x2238     ; 110 'n'  'o'
     dw 0x3E14, 0x0A14, 0x0408, 0x0A14, 0x0C7C     ; 112 'p'  'q'
     dw 0x3E08, 0x0204, 0x0448, 0x2A54, 0x2A20     ; 114 'r'  's'
     dw 0x023F, 0x2240, 0x103C, 0x2040, 0x107C     ; 116 't'  'u'
     dw 0x0E20, 0x2020, 0x0E3C, 0x2030, 0x203C     ; 118 'v'  'w'
     dw 0x2228, 0x0828, 0x220C, 0x2850, 0x283C     ; 120 'x'  'y'
     dw 0x2264, 0x2A4C, 0x2200, 0x0436, 0x2080     ; 122 'z'  '{'
     dw 0x0000, 0x3F80, 0x0000, 0x20B6, 0x0400     ; 124 '|'  '}'
     dw 0x0808, 0x0410, 0x0478, 0x2341, 0x2378     ; 126 '~'  ''
 endasm    
overfont:

**Mike, K8LH** · - 27th May 2018, 05:37

Originally Posted by richard

I think I prefer my take on this ...

A great example. Thank you.

Originally Posted by richard

tried a pbp version for the 5 byte compressed packed font, the unpacking done without asm
takes more code space than the compressing saves ...

That's a shame but it was worth a try.

Thank you very much for the pointers and help. It's been a fun experiment and I've learned a lot.

Cheerful regards, Mike

**richard** · - 27th May 2018, 05:44

Thank you very much for the pointers and help. It's been a fun experiment and I've learned a lot.

ditto
and I finally figured out what I was doing wrong with asm psect labels

**richard** · - 27th May 2018, 05:49

whats next
a ttf
a double size font for digits (0 to 9 +- : )

**wjsmarine** · - 27th May 2018, 10:24

Hi Richard,

Thanks for the fix on the single char problem, it works well but I've found another problem...

When I add DT Ints the big characters don't work, I tried with and without using mssp but same result.

Also there's something strange taking place with the led backlight insomuch as I need to sprinkle port pin enable code immediately following any lcd write (with or without DT Ints). I tried changing LCD_LIGHT from A.0 to A.1 (while leaving it connected to A.0) with no difference - does the Inc file employ any commands for the light?

Here's the edited code:

Code:

#CONFIG ; 16F1847.
        __config _CONFIG1, _FOSC_INTOSC & _WDTE_ON & _PWRTE_ON & _MCLRE_ON & _CP_OFF & _BOREN_OFF
        __config _CONFIG2, _PLLEN_OFF & _LVP_OFF
#ENDCONFIG

@ ERRORLEVEL -306   ; turn off crossing page boundary message
 
; --- *** Oscillator  *** ---------------------------------------------------
define      OSC         32
OSCCON = %11110000   ; 32 MHz, 
ANSELA = 0           ; all digital          
ANSELB = 0           ; all digital 
TRISA=%00000000
'TRISB=%00000000
TRISB=%11101011           ; Encoder inputs on B5-7

ch var byte
BUFF VAR BYTE [10]

 ;DEFINES FOR DISPLAY   use   font7x5_16.bas   or  font7x5_18.bas     for pic18
 #DEFINE PIC16 1            
 #define use_mssp 1   ; much faster and less words (1027 vs 1106).
 lcdheight con 5      ;  6 PAGES   
 lcdwidth  con 83     ; 84 PIXELS WIDE
 LCD_RST     var     LATA.4 
 LCD_DC      var     LATA.3
 LCD_CE      var     LATA.6
 LCD_LIGHT   var     LATA.0 
 LCD_CLK     var     LATB.4       ' SCK1     pin needs to be set as dig o/p
 LCD_DIN     var     LATB.2       ' SDO1     pin needs to be set as dig o/p
 ;--------------ONLY IF MSSP NOT USED---------------
' LCD_CLK  var     Portb.4       ' Clock
' LCD_DIN  var     Portb.2       ' Data
 
Include "Modedefs.bas"
INCLUDE "DT_INTS-14.bas"    ' Base Interrupt System
INCLUDE "ReEnterPBP.bas"    ' Include if using PBP type interrupts
Include "nokia_ds.INC"      ' bring it in
include "font7x5_16.bas"
'include "font7x5_16 edit degC.BAS"  ; use @ to access degC symbol.

ASM
INT_LIST  macro    ; IntSource,         Label,  Type, ResetFlag?
        INT_Handler    IOC_INT,  _Rot_Encoder,   PBP,  yes
    endm
    INT_CREATE               ; Creates the interrupt processor
ENDASM

@    INT_ENABLE   IOC_INT     ; Port Change Interrupt

'==========================    MAIN  Routine    ==============================
    gosub lcd_init
    LCDCLR
    ARRAYWRITE BUFF,["READY",0]
    LCDSTR 5,0,BUFF 
    PortA.0 = 0    ' turn on backlight.
    PAUSE 1000
    LCDCLR
    PAUSE 1000  
looper:
    LCDCLR
    PortA.0 = 0    ' turn on backlight.
    bigtxt = 1     ; double size chrs
    LCDSTR 0,0,"Noki+12"
    LCDSTR 0,2,"345678@" 
    bigtxt = 0     ; normal size chrs
'    LCDSTR 52,3,"Demo"
'    LCDSTR 0,4,"With@MSSP xfer" 
    LCDSTR 0,4,"Hi" 
    PortA.0 = 0    ' turn on backlight.
'    LCDSTR 0,5,"Dble Size Chrs"     
'    LCDSTR 0,5," "  ; this doesn't compile - causes errors and warnings wherever used.     
    LCDC 0,5,"a"    ; use LCDC for single chars.
    PortA.0 = 0    ' turn on backlight.
    PAUSE 1000       
    GOTO looper

Rot_Encoder:
'    if PortB.7 = 0 then        ' Check if Encoder pushbutton was pushed.
'    ButtPush = 1               ' Set the flag for a quick exit.
'    Old_Bits = New_Bits        ' Equalize the disturbance the pushbutton caused.
@ INT_RETURN                   ; Exit accordingly.
'    endif

END

Is the Inc file compatible with DT Ints?

Regards,
Bill

Thread: Nokia lcd include , small footprint to suit pic16's

Nokia lcd include , small footprint to suit pic16's

Re: Nokia lcd include , small footprint to suit pic16's

Re: Nokia lcd include , small footprint to suit pic16's

Re: Nokia lcd include , small footprint to suit pic16's

Re: Nokia lcd include , small footprint to suit pic16's

Re: Nokia lcd include , small footprint to suit pic16's

Re: Nokia lcd include , small footprint to suit pic16's

Re: Nokia lcd include , small footprint to suit pic16's

Re: Nokia lcd include , small footprint to suit pic16's

Re: Nokia lcd include , small footprint to suit pic16's

Re: Nokia lcd include , small footprint to suit pic16's

Re: Nokia lcd include , small footprint to suit pic16's

Re: Nokia lcd include , small footprint to suit pic16's

Re: Nokia lcd include , small footprint to suit pic16's

Re: Nokia lcd include , small footprint to suit pic16's

Re: Nokia lcd include , small footprint to suit pic16's

Re: Nokia lcd include , small footprint to suit pic16's

Re: Nokia lcd include , small footprint to suit pic16's

Re: Nokia lcd include , small footprint to suit pic16's

Re: Nokia lcd include , small footprint to suit pic16's

Re: Nokia lcd include , small footprint to suit pic16's

Re: Nokia lcd include , small footprint to suit pic16's

Re: Nokia lcd include , small footprint to suit pic16's

Re: Nokia lcd include , small footprint to suit pic16's

Re: Nokia lcd include , small footprint to suit pic16's

Re: Nokia lcd include , small footprint to suit pic16's

Re: Nokia lcd include , small footprint to suit pic16's

Re: Nokia lcd include , small footprint to suit pic16's

Re: Nokia lcd include , small footprint to suit pic16's

Re: Nokia lcd include , small footprint to suit pic16's

Re: Nokia lcd include , small footprint to suit pic16's

Re: Nokia lcd include , small footprint to suit pic16's

Re: Nokia lcd include , small footprint to suit pic16's

Re: Nokia lcd include , small footprint to suit pic16's

Re: Nokia lcd include , small footprint to suit pic16's

Re: Nokia lcd include , small footprint to suit pic16's

Re: Nokia lcd include , small footprint to suit pic16's

Re: Nokia lcd include , small footprint to suit pic16's

Re: Nokia lcd include , small footprint to suit pic16's

Re: Nokia lcd include , small footprint to suit pic16's

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