max7219 4x 8x8 panels spi

[richard]

for pic16 with spi port . 5 digits 6x5 numeric font right justified with leading zero suppression

[Ioannis]

A bit late but just noticed this valuable post! Thanks once again.

Is this driver for such a display?

[richard]

looks the same

[Ioannis]

Thanks!

Really cheap toys to play with!

Ioannis

[Ioannis]

Since I have on hand only 16F1827, I modified the code for the PortC pins but as expected does not work. Modifications in red.

I really do not know what lata.5 does in your code. Maybe a led to sign start?

   '****************************************************************
'*  Name    : max7219 16f1825                                      *
'*  Author  : richard                                              *
'*  Notice  : Copyright (c) 2019                                   *
'*          :                                                      *
'*  Date    : 25/2/2020                                            *
'*  Version : 1.1                                                  *
'*  Notes   : max7219   5 6x5 chrs on 4 8x8 panels                 *
'*          : right justified leading zero suppression             *
'*          :                                                      * 
'*          :                                                      * 
'*          : modified for pic16f1827                              *
'*******************************************************************

#CONFIG
             __config        _CONFIG1,    _FOSC_INTOSC & _CP_OFF & _WDTE_OFF  &  _PWRTE_ON  &  _MCLRE_ON  & _CLKOUTEN_OFF
              __config      _CONFIG2, _PLLEN_ON & _LVP_OFF
#ENDCONFIG
 

define OSC 32
goto overasm 
asm
GetAddress macro Label, Wout
    CHK?RP Wout
    movlw low Label          ; get low byte
    movwf Wout
    movlw High Label         ; get high byte
    movwf Wout + 1
    endm
endasm
overasm:

SSPCON1 = $20;
SSPSTAT = $40;
ANSELA = 0
ANSELB = 0
OSCCON = $70

tmp      var byte
dsp      var byte
dspbuff  var byte[32]
BUFF     var byte[16]
cnt      var byte
row      var byte
drow     var byte
srow     var byte
col      var byte
dcol     var byte
aFont    var word
fOffset  var word
cga      var byte
cgah     var byte
ch       var byte
chr      var byte
inx      var byte
mask     var word
counter  var word
bcnt     var byte
ncnt     var byte
number  var word

clear

'mxld     var portc.1
'mxck     var portc.0
'mxdi     var portc.2
mxld     var portb.1
mxck     var portb.4
mxdi     var porta.6

'trisc = %11111000
'trisa = %11011110
trisb = 0
trisa = 0

 
init:
    lata.5 = 1
    mxld = 1
    dsp = 11
    tmp = 5
    gosub xfer4
    dsp = 9
    tmp = 0
    gosub xfer4
    dsp = 12 
    tmp = 1
    gosub xfer4
    dsp = 10
    tmp = 8     
    gosub xfer4
    dsp = $b
    tmp = 7     
    gosub xfer4
    dsp = $f
    tmp = 0     
    gosub xfer4
@ GetAddress _font,_aFont

 
loopy:
    row = 1:col = 1  
    gosub showrjbuf
    gosub  strchr
    gosub show
    counter  =  counter + 1
    pause 100
GOTO loopy
end	 

strchr:     ;null  terminated
    bcnt = 0
    while buff[bcnt]
        chr = buff[bcnt]
        gosub gcga 
        bcnt = bcnt + 1
        col = col + 6
    wend
return 
 
show:     
    for srow = 0 to 7
        GOSUB SHOWROW 
    next 
return        
   
showROW:      
    	mxld = 0		
   	    for dcol = 0 to 3        	 
        	 SSPBUF = srow + 1 
             while !pir1.3:wend
             pir1.3 = 0
             SSPBUF = dspbuff[(srow<<2) + dcol]  rev 8
             while !pir1.3:wend
             pir1.3 = 0    
        next 
    	mxld = 1 
return     


xfer4:
     for dcol = 0 to 3
         mxld = 0
         pir1.3 = 0
         SSPBUF = dsp  
         while !pir1.3:wend
         pir1.3=0
         SSPBUF =tmp 
         while !pir1.3:wend
         pir1.3 = 0
     next
     mxld = 1 
return

gcga:      ;ROW= 0-1 COL=0-28 CHR = SPACE,"0" TO ";"
    if chr = " " then chr = ";"   ;TRANSLATE SPACE TO ";"
    fOffset = (chr - "0")*3 + aFont  ; point to cga data
    drow = row  ;0 or 1
    mask = ~(63<<(col//8))
    inx = col/8
    for tmp = 0 to 2 
        gosub unpack
        inx = (drow<<2) + col/8 
        dspbuff[inx] = dspbuff[inx] & mask.lowbyte
        dspbuff[inx] = dspbuff[inx] | (cga<<(col//8))         
        if  mask.highbyte then
            INX = INX + 1
            dspbuff[inx] = dspbuff[inx] & mask.highbyte
            dspbuff[inx] = dspbuff[inx] | (cga>>(8-col//8) )
            inx = inx + 3
        else
            inx = inx + 4
        endif
'        SROW=DROW
'        GOSUB SHOWROW
'        PAUSE 50
        drow = drow + 1
        dspbuff[inx] = dspbuff[inx] & mask.lowbyte
        dspbuff[inx] = dspbuff[inx] | (cgah<<(col//8))
        if  mask.highbyte then
            INX = INX+1
            dspbuff[inx] = dspbuff[inx] & mask.highbyte
            dspbuff[inx] = dspbuff[inx] | (cgah>>(8 - col//8) )
        endif
'        SROW=DROW
'        GOSUB SHOWROW
'        PAUSE 50
        drow = drow + 1
        fOffset = fOffset + 1
     next            
return  
        
 
showrjbuf:    ;load  buff righ justified
    number = counter
    for ncnt = 0 to 4
        BUFF[ncnt] = $30
    next
    while number >10000
        buff[0] = buff[0] + 1
        number = number - 10000
    wend
    while number >1000
        buff[1] = buff[1] + 1
        number = number - 1000
    wend 
    while number>100
        buff[2] = buff[2] + 1
        number = number - 100
    wend 
    while number >10
        buff[3] = buff[3] + 1
        number = number -10
    wend 
    buff[4] = buff[4] + number    
lzr:       ;repress leading zeros
    for ncnt = 0 to 3
      if BUFF[ncnt] == $30 then
           BUFF[ncnt] = $20
      else
          return
      endif
    next
return
 
       

unpack:
  asm
    CHK?RP  _fOffset
    MOVF _fOffset+1,W
    CHK?RP   EEADRH
    MOVWF EEADRH ;MS Byte of Program Address to read
    CHK?RP  _fOffset
    MOVF _fOffset,W
    CHK?RP   EEADR
    MOVWF EEADR ;LS Byte of Program Address to read
    CHK?RP   EECON1
    BSF EECON1, EEPGD ;Point to PROGRAM memory
    BSF EECON1, RD ;EE Read
    NOP
    NOP 
    CHK?RP   EEDAT              ;UNPACK DATA
    RLF    EEDAT, W 
    RLF    EEDATH, W
    CHK?RP  _cgah
    MOVWF   _cgah
    CHK?RP   EEDAT
    BCF    EEDAT,7
    MOVF   EEDAT,W 
    CHK?RP  _cga
    MOVWF   _cga
    RST?RP 
    return        
 endasm 


'//Font Generated by MikroElektronika GLCD Font Creator 1.2.0.0
'//MikroElektrnika 2011 
'//http://www.mikroe.com 

'//GLCD FontName : Untitled5x6
'//GLCD FontSize : 5 x 6

'const unsigned short Untitled5x6[] = {
font :      ;in packed format for pic16 dw lines
;@ db  0x0E,0x11,0x11,0x11,0x11,0x0E;                                                   // Code for char num 48  0
@ dw    0x88e,0x891,0x711    ;                                           
;@ db   0x04,0x06,0x04,0x04,0x04,0x0E;                                                  // Code for char num 49  1
@ dw    0x304,0x204,0x704
;@ db   0x0E,0x11,0x08,0x04,0x02,0x1F;                                                  // Code for char num 50
@ dw   0x88e,0x208,0xf82
;@ db   0x0E,0x10,0x1C,0x10,0x10,0x0E;                                                  // Code for char num 51
@ dw    0x80e,0xe10,0x710
;@ db   0x01,0x01,0x05,0x1F,0x04,0x04;                                                  // Code for char num 52
@ dw    0x81,0xf85,0x204
;@ db   0x0F,0x01,0x01,0x0E,0x10,0x0F;                                                  // Code for char num 53
@ dw    0x8f,0x701,0x790
;@ db   0x0E,0x11,0x01,0x0F,0x11,0x0E;                                                  // Code for char num 54  6
@ dw   0x88e,0x781,0x711 
;@ db   0x1F,0x10,0x08,0x04,0x02,0x02;                                                  // Code for char num 55 
@ dw    0x81f,0x208,0x102
;@ db   0x0E,0x11,0x11,0x0E,0x11,0x0E;                                                  // Code for char num 56  8
@ dw    0x88e,0x88e ,0x711 
;@ db   0x0E,0x11,0x11,0x1E,0x10,0x0E;                                                  // Code for char num 57  
@ dw   0x88e,0xf11,0x711
;@ db   0x00,0x04,0x00,0x00,0x04,0x00;                                                  // Code for char num 58  ;
@ dw    0x200,0,0x200                                                                    
;@ db   0x00,0x00,0x00,0x00,0x00,0x00;                                                   // space
@ dw     0,0, 0

Ioannis

[richard]

Since I have on hand only 16F1827, I modified the code for the PortC pins but as expected does not work. Modifications in red.

default sdo for that chip is rb2, for mxdi var porta.6 ​you need to set apfcon0.6

I really do not know what lata.5 does in your code. Maybe a led to sign start?

nether do i , most probably a trigger for log analyzer

[Ioannis]

Well, I was just about to post that logic analyzer keeps data at zero. I was watching that and could not think what was wrong...!

Doh!

Thanks Richard. Works now.

Ioannis

[Ioannis]

What is the logic in the packing of the characters into words?

Ioannis

[richard]

What is the logic in the packing of the characters into words?

uses half the amount of flash memory when using 7bit numbers [pic16 flash is 14 bits wide] so you need to pack it.
it takes very little time for the pic to unpack so there is no real penalty for a huge saving

[Ioannis]

Yes, OK. But from 6 bytes you went to 3 words. Cannot understand the calculation you did.

;@ db 0x0E,0x10,0x1C,0x10,0x10,0x0E; // Code for char num 51 "3"
@ dw 0x80e,0xe10,0x710

0E=00001110, 10=00010000 and all these makes 80E?

Ioannis

[richard]

0xE=0b00001110, 0x10=0b00010000


and all these makes 80E

7 high bits | 7 low bits
0x10<<7 | 0x0e &0x7f = 0x80e
0b000100000000000 | 0b0001110 = 0b00010000001110 <==> 0x80e [14 bits]

[Ioannis]

After making the paper and pencil homework, I was amazed by your thinking! So simple, so clever, so efficient!

Ioannis

[Ioannis]

Mikroe outputs the characters in columns but your data is in rows. Did you rotate them by hand or can GLCD do that?

Ioannis

[richard]

http://www.picbasic.co.uk/forum/show...955#post147955

[Ioannis]

Well, results don't match.

I do this:

1. on GLCD Font Creator 5x6 is selected since that is what says in the program: '//GLCD FontSize : 5 x 6



2. Then the character 48 is designed



3.Then Export for GLCD



The data do not match as can be seen. I am sure that I did something wrong, but what?

Ioannis

[richard]

thats glcd mode you need tft mode

[Ioannis]

Yes, that did it.

Thanks,
Ioannis

[Ioannis]

The 5x6 grid is not very roomy for good fonts. After a bit of experimenting I ended up with the rectangular fonts that follow. I thing they are readable from longer distance.

@ dw 0x89F,	0x891,	0xF91      ; 0
@ dw 0x206,	0x204,	0xF84      ; 1
@ dw 0x81F,	0x9F,	0xF81      ; 2
@ dw 0x81F,	0x81E,	0xF90      ; 3
@ dw 0x489,	0xF89,	0x408      ; 4
@ dw 0x9F,	0x81F,	0xF90      ; 5
@ dw 0x9F,	0x89F,	0xF91      ; 6
@ dw 0x81F,	0x410,	0x408      ; 7
@ dw 0x89F,	0x89F,	0xF91      ; 8
@ dw 0x89F,	0x81F,	0xF90      ; 9
@ dw 0x200,     0x0,	0x200      ; :
@ dw 0,0,0                         ; space

A small demo video is uloaded here:



Ioannis

[HenrikOlsson]

I'm slowly working on an 18F version.
Currently running on the 18F57Q43 using the SPI peripheral (planning to get to DMA eventually) but can work with MSSP or even SHIFTOUT.
Supports an arbitrary width display (within limits of available RAM) but only one row (starting to second guess myself on that one). Pixel by pixel scrolling left/right/up/down is almost working. We'll see where this ends up in the comming weeks...

[richard]

you could always just add a driver to suit this and not have to reinvent the wheel font&graphics wise etc

http://www.picbasic.co.uk/forum/showthread.php?t=24218

i'm sure a max7219 driver would be easy enough to contrive and it would make multi row /column display simpler

[Ioannis]

I'm slowly working on an 18F version....

Very interesting work! Looking forward!

Ioannis

[richard]

now with scrolling

   
'****************************************************************'*  Name    : max7219 16f1825                                      *
'*  Author  : richard                                              *
'*  Notice  : Copyright (c) 2019                                   *
'*          :                                                      *
'*  Date    : 25/2/2020                                            *
'*  Version : 1.1                                                  *
'*  Notes   : max7219   5 6x5 chrs on 4 8x8 panels                 *
'*          : right justified leading zero suppression             *
'*          :                                                      * 
'*          :                                                      * 
'*          : pic16f1825                                           *
'*******************************************************************
#CONFIG
             __config    _CONFIG1, _FOSC_INTOSC & _CP_OFF & _WDTE_OFF  &  _PWRTE_ON  &  _MCLRE_ON  & _CLKOUTEN_OFF
             __config    _CONFIG2, _PLLEN_ON & _LVP_OFF
#ENDCONFIG
define OSC 32
goto overasm 
asm
GetAddress macro Label, Wout
    CHK?RP Wout
    movlw low Label          ; get low byte
    movwf Wout
    movlw High Label         ; get high byte
    movwf Wout + 1
    endm
endasm
overasm:
SSPCON1 = $20;
SSPSTAT = $40;
ANSELA = 0
ANSELC = 0
OSCCON = $70


tmp      var byte
dsp      var byte
dspbuff  var byte[32]
BUFF     var byte[16]
cnt      var byte
row      var byte
drow     var byte
srow     var byte
col      var byte
dcol     var byte
aFont    var word
fOffset  var word
cga      var byte
cgah     var byte
ch       var byte
chr      var byte
inx      var byte
mask     var word
counter  var word
bcnt     var byte
ncnt     var byte
number  var word
clear


mxld     var portc.1
mxck     var portc.0
mxdi     var portc.2


trisc = %11111000
trisa = %11011110
lata.0=1
init:
    lata.5 = 1
    mxld = 1
    dsp = 11
    tmp = 5
    gosub xfer4
    dsp = 9
    tmp = 0
    gosub xfer4
    dsp = 12 
    tmp = 1
    gosub xfer4
    dsp = 10
    tmp = 8     
    gosub xfer4
    dsp = $b
    tmp = 7     
    gosub xfer4
    dsp = $f
    tmp = 0     
    gosub xfer4
@ GetAddress _font,_aFont
    
'dspbuff[0]=$73
'dspbuff[4]=$37 
counter=1235
    col = 1  
    gosub showrjbuf
    gosub  strchr   
gosub show  
 pause 100 
loopy:
gosub rotate
'    col = 1  
'    gosub showrjbuf
'    gosub  strchr
'    chr=":" + counter.0
'    col = 27 
'    gosub  gcga 
    gosub show
'    counter  =  counter + 1
   pause 100
GOTO loopy
end	 


strchr:     ;null  terminated
    bcnt = 0
    while buff[bcnt]
        chr = buff[bcnt]
        gosub gcga 
        bcnt = bcnt + 1
        col = col + 5
    wend
return 
 
show:     
    for srow = 0 to 7
        GOSUB SHOWROW 
    next 
return        
   
showROW:      
    	mxld = 0		
   	    for dcol = 0 to 3        	 
        	 SSPBUF = srow + 1 
             while !pir1.3:wend
             pir1.3 = 0
             SSPBUF = dspbuff[(srow<<2) + dcol] rev 8
             while !pir1.3:wend
             pir1.3 = 0    
        next 
    	mxld = 1 
return


xfer4:
     for dcol = 0 to 3
         mxld = 0
         pir1.3 = 0
         SSPBUF = dsp  
         while !pir1.3:wend
         pir1.3=0
         SSPBUF =tmp 
         while !pir1.3:wend
         pir1.3 = 0
     next
     mxld = 1 
return


gcga:      ;ROW= 0-1 COL=0-28 CHR = SPACE,"0" TO ";"
    if chr = " " then chr = ";"   ;TRANSLATE SPACE TO ";"
    fOffset = (chr - "0")*4 + aFont  ; point to cga data
    drow = 0 
    mask = ~(31<<(col//8))
    inx = col/8
    for tmp = 0 to 3 
        gosub unpack
        inx = (drow<<2) + col/8 
        dspbuff[inx] = dspbuff[inx] & mask.lowbyte
        dspbuff[inx] = dspbuff[inx] | (cga<<(col//8))         
        if  mask.highbyte then
            INX = INX + 1
            dspbuff[inx] = dspbuff[inx] & mask.highbyte
            dspbuff[inx] = dspbuff[inx] | (cga>>(8-col//8) )
            inx = inx + 3
        else
            inx = inx + 4
        endif
        drow = drow + 1
        dspbuff[inx] = dspbuff[inx] & mask.lowbyte
        dspbuff[inx] = dspbuff[inx] | (cgah<<(col//8))
        if  mask.highbyte then
            INX = INX+1
            dspbuff[inx] = dspbuff[inx] & mask.highbyte
            dspbuff[inx] = dspbuff[inx] | (cgah>>(8 - col//8) )
        endif
        drow = drow + 1
        fOffset = fOffset + 1
     next            
return  
 
showrjbuf:    ;load  buff righ justified
    number = counter
    for ncnt = 0 to 4
        BUFF[ncnt] = $30
    next
    while number >10000
        buff[0] = buff[0] + 1
        number = number - 10000
    wend
    while number >1000
        buff[1] = buff[1] + 1
        number = number - 1000
    wend 
    while number>100
        buff[2] = buff[2] + 1
        number = number - 100
    wend 
    while number >10
        buff[3] = buff[3] + 1
        number = number - 10
    wend 
    buff[4] = buff[4] + number    
lzr:       ;repress leading zeros
    for ncnt = 0 to 3
      if BUFF[ncnt] == $30 then
           BUFF[ncnt] = $20
      else
          return
      endif
    next
return


unpack:
    readcode foffset ,cgah 
    cga=(cgah >> 4) 
    cgah=(cgah&15 ) 
return 


rotate:
asm
    bcf STATUS,C
    rrf   _dspbuff+3,f
    rrf   _dspbuff+2,f
    rrf   _dspbuff+1,f
    rrf   _dspbuff ,f
    btfsc  STATUS, C
    bsf   _dspbuff+3,7
    bcf STATUS,C
    rrf   _dspbuff+7,f
    rrf   _dspbuff+6,f
    rrf   _dspbuff+5,f
    rrf   _dspbuff+4 ,f
    btfsc  STATUS, C
    bsf   _dspbuff+7,7
    bcf STATUS,C
    rrf   _dspbuff+11,f
    rrf   _dspbuff+10,f
    rrf   _dspbuff+9,f
    rrf   _dspbuff+8 ,f
    btfsc  STATUS, C
    bsf   _dspbuff+11,7
    bcf STATUS,C
    rrf   _dspbuff+15,f
    rrf   _dspbuff+14,f
    rrf   _dspbuff+13,f
    rrf   _dspbuff+12 ,f
    btfsc  STATUS, C
    bsf   _dspbuff+15,7
    bcf STATUS,C
    rrf   _dspbuff+19,f
    rrf   _dspbuff+18,f
    rrf   _dspbuff+17,f
    rrf   _dspbuff+16 ,f
    btfsc  STATUS, C
    bsf   _dspbuff+19,7
    bcf STATUS,C
    rrf   _dspbuff+23,f
    rrf   _dspbuff+22,f
    rrf   _dspbuff+21,f
    rrf   _dspbuff+20 ,f
    btfsc  STATUS, C
    bsf   _dspbuff+23,7
    bcf STATUS,C
    rrf   _dspbuff+27,f
    rrf   _dspbuff+26,f
    rrf   _dspbuff+25,f
    rrf   _dspbuff+24 ,f
    btfsc  STATUS, C
    bsf   _dspbuff+27,7
    bcf STATUS,C
    rrf   _dspbuff+31,f
    rrf   _dspbuff+30,f
    rrf   _dspbuff+29,f
    rrf   _dspbuff+28 ,f
    btfsc  STATUS, C
    bsf   _dspbuff+31,7
endasm
return 
 
 
font: 
@ dw 0x69,0x99,0x99,0x96
@ dw 0x46,0x54,0x44,0x4F
@ dw 0x69,0x98,0x61,0x1F
@ dw 0x69,0x86,0x89,0x96
@ dw 0x99,0x9E,0x88,0x88
@ dw 0xF1,0x17,0x89,0x96
@ dw 0x69,0x17,0x99,0x96
@ dw 0xF8,0x84,0x42,0x22
@ dw 0x69,0x96,0x99,0x96
@ dw 0x69,0x9E,0x89,0x96
@ dw 0x00,0x10,0x01,0x00
@ dw 0x00,0x00,0x00,0x00

[Ioannis]

Thanks for the new example.

In real life does it look like the video? I mean it seems that the scrolling is not very smooth but stepping a bit. OK, since the resolution is not that great this is expected I guess.

Ioannis

[richard]

ITS as smooth as silk , can't say the same for the camera

made a better parametric version too

rotate:
asm
    banksel _bcnt    ;ROW
    movlw   8
    movwf   _bcnt 
    banksel _inx
    movlw   31         ;BUFFER SIZE
    movwf   _inx
NROW    
    banksel _inx 
    movlw   high (_dspbuff)
    movwf   FSR0H
    movlw   low  (_dspbuff)
    movwf   FSR0L
    movf    _inx,W
    ADDWF   FSR0L,F
    bcf     STATUS, C
    rrf     INDF0 ,f     ;PER COLUMN
    addfsr  0,-1
    rrf     INDF0 ,f     ;PER COLUMN
    addfsr  0,-1
    rrf     INDF0 ,f     ;PER COLUMN
    addfsr  0,-1
    rrf     INDF0 ,f     ;PER COLUMN
    btfss   STATUS, C
    GOTO    NBNC
    addfsr  0,3
    bsf     INDF0,7
NBNC 
    movlw   4         ;ROW LENGTH
    SUBWF   _inx,F
    banksel _bcnt
    DECFSZ  _bcnt ,F
    GOTO    NROW
endasm
return

[richard]

even nicer

rotate:
asm
    banksel _bcnt    ;ROW
    movlw   8
    movwf   _bcnt
    movlw   high (_dspbuff)
    movwf   FSR0H
    movlw   low  (_dspbuff)
    movwf   FSR0L
    movlw   31         ;BUFFER SIZE
    ADDWF   FSR0L,F
    banksel _bcnt
NROW     
    bcf     STATUS, C
    rrf     INDF0 ,f     ;PER COLUMN
    addfsr  0,-1
    rrf     INDF0 ,f     ;PER COLUMN
    addfsr  0,-1
    rrf     INDF0 ,f     ;PER COLUMN
    addfsr  0,-1
    rrf     INDF0 ,f     ;PER COLUMN
    btfss   STATUS, C
    GOTO    NBNC
    addfsr  0,3
    bsf     INDF0,7
    addfsr  0,-3
NBNC 
    addfsr  0,-1
    DECFSZ  _bcnt ,F
    GOTO    NROW
endasm
return

[Demon]

looks the same

Is anyone else getting "video not available" for Richard's stuff?

I can see Ioannis' video's properly.

[richard]

"video not available" for Richard's stuff?

i pressed the wrong button on my youtube dashboard and deleted a bit of stuff , its not recoverable and the originals are lost too