Code:
'****************************************************************'* 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
Re: max7219 4x 8x8 panels spi
Bookmarks