上传一份完整的SPWM code in ASM,也旨在提高国人的设计水平

.include "m16def.inc"
.cseg
.org 0
jmp start
.org ovf0addr
jmp t0int
.org icp1addr
jmp t0cp

.org $30
dada:
.db 21,24,27,30,34,37,40,43,46,49,52,55,58,61,63,66,69,72,74,77,80,82,84,87,89,91,93,96,98,99,101,103,105,106,108,109,111,112,113,114,115,116,117,117,118,119,119,119,119,119,119,119,119,119,119,118,117,117,116,115,114,113,112,111,109,108,106,105,103,101,99,98,96,93,91,89,87,84,82,80,77,74,72,69,66,63,61,58,55,52,49,46,43,40,37,34,30,27,24,21
start:
ldi r20, $4
ldi r21, $5f
out sph, r20
out spl, r21
;call init0
call init1
call iniport
bset i
here:
rjmp here

init0:
in r20, tccr0
ldi r21, $1
or r20, r21
ldi r21, $f9
and r20, r21
out tccr0, r20
in r20, timsk
ldi r21, $1
or r20, r21
out timsk, r20
ret

init1:
ldi r20, $a2
out tccr1a, r20
ldi r20, $11
out tccr1b, r20

ldi r20, 00
ldi r21, 50
out ocr1ah, r20
out ocr1al, r21
out ocr1bh, r20
out ocr1bl, r21

ldi r21, 150
out icr1h, r20
out icr1l, r21

in r20, timsk
ldi r21, $20
or r20, r21
out timsk, r20
ret

iniport:
ldi r20, $ff;
out ddrb, r20;
ldi r20, 255
out ddrd, r20
out portd, r20
ret

t0int:
in r20, portb
inc r20
out portb, r20
reti

t0cp:
;count = r30
;temp = r19
;zf = T in sreg
cpi r30, $c4
brne onwheel
overwheel:
ldi r31, $00
ldi r30, $60
in r20, sreg
ldi r21, $40
eor r20, r21
out sreg, r20
onwheel:
lpm r19, z+
brts zheng
brtc fan
zheng:
ldi r20, 1
out ocr1bh, r20
out ocr1bl, r20
ldi r20, 00
out ocr1ah, r20
out ocr1al, r19
reti
fan:
ldi r20, 1
out ocr1ah, r20
out ocr1al, r20
ldi r20, 00
out ocr1bh, r20
out ocr1bl, r19
reti