Nokia lcd include , small footprint to suit pic16's

[Mike, K8LH]

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

[Mike, K8LH]

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]

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]

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



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

  /********************************************************************
   *                                                                  *
   *  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]

thanks mike , the concept works nicely

xc8 version (393)+240 words , uses mssp1

#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

#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]

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]

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