.module led.c
.area text(rom, con, rel)
.dbfile D:\ICC-AVR\examples.sl\LED\led.c
.dbfunc s Delay _Delay fI
; a -> R16
; b -> R18
.even
_Delay::
.dbline 6{
; #include
; /**********************************************************
; 为了可以看见LED的图案变化，每次LED图案变化需要保持一定时间
; *********************************************************/
; void Delay()
; {
.dbline 9
; unsigned char a, b;
;
; for (a = 1; a; a++)
ldi R16,1
rjmp L5
L2:
.dbline 10
; for (b = 1; b; b++)
ldi R18,1
rjmp L9
L6:
.dbline 11
L7:
.dbline 10
inc R18
L9:
.dbline 10
tst R18
brne L6
L3:
.dbline 9
inc R16
L5:
.dbline 9
tst R16
brne L2
.dbline 12}
; ;
; }
L1:
ret
.dbsym r a 16 c
.dbsym r b 18 c
.dbfunc s LED_On _LED_On fI
; i -> R20,R21
.even
_LED_On::
rcall push_gset1
mov R20,R16
mov R21,R17
.dbline 15{
;
; void LED_On(int i)
; {
.dbline 16
; PORTB=~(1 ldi R16,1
ldi R17,0
mov R18,R20
mov R19,R21
rcall lsl16
mov R2,R16
mov R3,R17
com R2
com R3
out 0x18,R2
.dbline 17
; Delay();
rcall _Delay
.dbline 18}
; }
L10:
rcall pop_gset1
ret
.dbsym r i 20 I
.dbfunc s main _main fI
; i -> R20,R21
.even
_main::
.dbline 21{
;
; void main()
; {
.dbline 23
; int i;
; DDRB = 0xFF; /* 定义B口为输出*/
ldi R24,255
out 0x17,R24
.dbline 24
; PORTB = 0xFF; /* 关闭全部LED */
out 0x18,R24
rjmp L13
L12:
.dbline 27
;
; while (1)
; {
.dbline 29
; /* 往前步进 */
; for (i = 0; i < 8; i++)
clr R20
clr R21
L15:
.dbline 30
mov R16,R20
mov R17,R21
rcall _LED_On
L16:
.dbline 29
subi R20,255 ; offset = 1
sbci R21,255
.dbline 29
cpi R20,8
ldi R30,0
cpc R21,R30
brlt L15
.dbline 32
; LED_On(i);
; /* 往后步进 */
; for (i = 8; i > 0; i--)
ldi R20,8
ldi R21,0
L19:
.dbline 33
mov R16,R20
mov R17,R21
rcall _LED_On
L20:
.dbline 32
subi R20,1
sbci R21,0
.dbline 32
clr R2
clr R3
cp R2,R20
cpc R3,R21
brlt L19
.dbline 35
; LED_On(i);
; /* 跳 跃 */
; for (i = 0; i < 8; i += 2)
clr R20
clr R21
L23:
.dbline 36
mov R16,R20
mov R17,R21
rcall _LED_On
L24:
.dbline 35
subi R20,254 ; offset = 2
sbci R21,255
.dbline 35
cpi R20,8
ldi R30,0
cpc R21,R30
brlt L23
.dbline 37
; LED_On(i);
; for (i = 7; i > 0; i -= 2)
ldi R20,7
ldi R21,0
L27:
.dbline 38
mov R16,R20
mov R17,R21
rcall _LED_On
L28:
.dbline 37
subi R20,2
sbci R21,0
.dbline 37
clr R2
clr R3
cp R2,R20
cpc R3,R21
brlt L27
.dbline 39
L13:
.dbline 26
rjmp L12
X0:
.dbline 40}
; LED_On(i);
; }
; }
L11:
ret
.dbsym r i 20 I
