.text
.global _start
_start:
@RCC使能
ldr r0,=0x50000A28
ldr r1,[r0]
orr r1,r1,#(3<<4)
str r1,[r0]
led1:
ldr r0,=0x50006000
ldr r1,[r0]
BIC r1,r1,#(3<<20)
ORR R1,R1,#(1<<20)
str r1,[r0]
ldr r0,=0x50006004
ldr r1,[r0]
BIC r1,r1,#(1<<10)
str r1,[r0]
ldr r0,=0x50006008
ldr r1,[r0]
BIC r1,r1,#(3<<20)
str r1,[r0]
ldr r0,=0x5000600C
ldr r1,[r0]
BIC r1,r1,#(3<<20)
str r1,[r0]
led3:
ldr r0,=0x50006000
ldr r1,[r0]
BIC r1,r1,#(3<<16)
ORR R1,R1,#(1<<16)
str r1,[r0]
ldr r0,=0x50006004
ldr r1,[r0]
BIC r1,r1,#(1<<8)
str r1,[r0]
ldr r0,=0x50006008
ldr r1,[r0]
BIC r1,r1,#(3<<16)
str r1,[r0]
ldr r0,=0x5000600C
ldr r1,[r0]
BIC r1,r1,#(3<<16)
str r1,[r0]
led2:
ldr r0,=0x50007000
ldr r1,[r0]
BIC r1,r1,#(3<<20)
ORR R1,R1,#(1<<20)
str r1,[r0]
ldr r0,=0x50007004
ldr r1,[r0]
BIC r1,r1,#(1<<10)
str r1,[r0]
ldr r0,=0x50007008
ldr r1,[r0]
BIC r1,r1,#(3<<20)
str r1,[r0]
ldr r0,=0x5000700C
ldr r1,[r0]
BIC r1,r1,#(3<<20)
str r1,[r0]
fan:
ldr r0,=0x50006000
ldr r1,[r0]
BIC r1,r1,#(3<<18)
ORR R1,R1,#(1<<18)
str r1,[r0]
ldr r0,=0x50006004
ldr r1,[r0]
BIC r1,r1,#(1<<9)
str r1,[r0]
ldr r0,=0x50006008
ldr r1,[r0]
BIC r1,r1,#(3<<18)
str r1,[r0]
ldr r0,=0x5000600C
ldr r1,[r0]
BIC r1,r1,#(3<<18)
str r1,[r0]
ldr r0,=0x50006014
ldr r1,[r0]
ORR r1,r1,#(1<<9)
str r1,[r0]
loop:
bl led1_on
bl led2_off
bl led3_off
bl delay
bl led2_on
bl led1_off
bl led3_off
bl delay
bl led3_on
bl led1_off
bl led2_off
bl delay
bl loop
led1_on:
@亮
ldr r0,=0x50006014
ldr r1,[r0]
ORR r1,r1,#(1<<10)
str r1,[r0]
mov pc,lr
led1_off:
@灭
ldr r0,=0x50006014
ldr r1,[r0]
bic r1,r1,#(1<<10)
str r1,[r0]
mov pc,lr
led3_on:
@亮
ldr r0,=0x50006014
ldr r1,[r0]
ORR r1,r1,#(1<<8)
str r1,[r0]
mov pc,lr
led3_off:
@灭
ldr r0,=0x50006014
ldr r1,[r0]
bic r1,r1,#(1<<8)
str r1,[r0]
mov pc,lr
led2_on:
@亮
ldr r0,=0x50007014
ldr r1,[r0]
ORR r1,r1,#(1<<10)
str r1,[r0]
mov pc,lr
led2_off:
@灭
ldr r0,=0x50007014
ldr r1,[r0]
bic r1,r1,#(1<<10)
str r1,[r0]
mov pc,lr
delay:
ldr r0,=0x10000000
mm:
cmp r0,#0
sub r0,r0,#1
bne mm
mov pc,lr
.end
