.module DAC.c
.area text(rom, con, rel)
.dbfile D:\OLED\DAC.c
.dbfunc e InitDAC _InitDAC fV
.even
_InitDAC::
.dbline -1
.dbline 18
; //ICC-AVR application builder : 2006-02-12 14:00:00
; // Target : ATmega48
; // Crystal: 1.000Mhz
; // Author: jackyan
;
; #include "iom48v.h"
; #include "macros.h"
; #include "Defs.h"
; #include "var.h"
;
; void WriteDA(ubyte bright);
;
; #define DAsync BIT0
; #define DAsclk BIT1
; #define DAout BIT2
;
; void InitDAC(void)
; {
.dbline 19
; WriteDA(Bright);
lds R16,_Bright
rcall _WriteDA
.dbline -2
L1:
.dbline 0 ; func end
ret
.dbend
.dbfunc e WriteDA _WriteDA fV
; cnt -> R20
; temp -> R22
; bright -> R16
.even
_WriteDA::
rcall push_gset2
.dbline -1
.dbline 23
; }
;
; void WriteDA(ubyte bright)
; {
.dbline 25
; ubyte cnt;
; ubyte temp=0;
clr R22
.dbline 27
;
; set(DDRB,DAsync);
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sbi 0x4,0
.dbline 27
.dbline 27
.dbline 28
; set(DDRB,DAsclk);
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sbi 0x4,1
.dbline 28
.dbline 28
.dbline 29
; set(DDRB,DAout);
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sbi 0x4,2
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.dbline 29
.dbline 30
; temp=bright>>4;
mov R22,R16
swap R22
andi R22,#0x0F
.dbline 31
; cnt=8;
ldi R20,8
rjmp L4
L3:
.dbline 33
; while(cnt>0)
; {
.dbline 34
; clr(PORTB,DAsync);
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cbi 0x5,0
.dbline 34
.dbline 34
.dbline 35
; set(PORTB,DAsclk);
.dbline 35
sbi 0x5,1
.dbline 35
.dbline 35
.dbline 36
; clr(PORTB,DAout);
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cbi 0x5,2
.dbline 36
.dbline 36
.dbline 37
; if (chk(temp,BIT7))
sbrc R22,7
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.dbline 38
sbi 0x5,2
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L6:
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.dbline 39
lsl R22
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dec R20
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.dbline 41
cbi 0x5,1
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.dbline 41
.dbline 42
L4:
.dbline 32
clr R2
cp R2,R20
brlo L3
.dbline 44
; set(PORTB,DAout);
; temp ; cnt--;
; clr(PORTB,DAsclk); //0
; }
;
; bright mov R24,R16
andi R24,#0x0F
swap R24
mov R16,R24
.dbline 45
; temp=bright|0x0f;
mov R22,R24
ori R22,15
.dbline 46
; cnt=8;
ldi R20,8
rjmp L9
L8:
.dbline 48
; while(cnt>0)
; {
.dbline 49
; clr(PORTB,DAsync);
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cbi 0x5,0
.dbline 49
.dbline 49
.dbline 50
; set(PORTB,DAsclk);
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sbi 0x5,1
.dbline 50
.dbline 50
.dbline 51
; clr(PORTB,DAout);
.dbline 51
cbi 0x5,2
.dbline 51
.dbline 51
.dbline 52
; if (chk(temp,BIT7))
sbrc R22,7
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.dbline 53
sbi 0x5,2
.dbline 53
L11:
.dbline 53
.dbline 54
lsl R22
.dbline 55
dec R20
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.dbline 56
cbi 0x5,1
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.dbline 56
.dbline 57
L9:
.dbline 47
clr R2
cp R2,R20
brlo L8
.dbline 59
; set(PORTB,DAout);
; temp ; cnt--;
; clr(PORTB,DAsclk); //0
; }
;
; set(PORTB,DAsync);
.dbline 59
sbi 0x5,0
.dbline 59
.dbline 59
.dbline 60
; set(PORTB,DAsclk);
.dbline 60
sbi 0x5,1
.dbline 60
.dbline 60
.dbline 61
; set(PORTB,DAout);
.dbline 61
sbi 0x5,2
.dbline 61
.dbline 61
.dbline -2
L2:
rcall pop_gset2
.dbline 0 ; func end
ret
.dbsym r cnt 20 c
.dbsym r temp 22 c
.dbsym r bright 16 c
.dbend
