11.10作业

 
 
.text 
.global _start
_start: 
    ldr r0,=0x50000a28
    ldr r1,[r0]
    orr r1,r1,#(0x3<<4)
     orr r1,r1,#(0x1<<1)
    str r1,[r0]
 
    ldr r0,=0x50006000
    ldr r1,[r0]
    bic r1,r1,#(0x3<<20)
    orr r1,r1,#(0x1<<20)
    bic r1,r1,#(0x3<<16)
    orr r1,r1,#(0x1<<16)
    str r1,[r0]
 
 
    ldr r0,=0x50007000
    ldr r1,[r0]
    bic r1,r1,#(0x3<<20)
    orr r1,r1,#(0x1<<20)
    str r1,[r0]
 
    ldr r0,=0x50003000
    ldr r1,[r0]
    bic r1,r1,#(0x3<<12)
    orr r1,r1,#(0x1<<12)
    str r1,[r0]
 
    ldr r0,=0x50006004
    ldr r1,[r0]
    bic r1,r1,#(0x1<<10)
    bic r1,r1,#(0x1<<8)
    str r1,[r0]
 
 
    ldr r0,=0x50007004
    ldr r1,[r0]
    bic r1,r1,#(0x1<<10)
    str r1,[r0]
 
    ldr r0,=0x50003004
    ldr r1,[r0]
    bic r1,r1,#(0x1<<6)
    str r1,[r0]
 
    ldr r0,=0x50006008
    ldr r1,[r0]
    bic r1,r1,#(0x3<<20)
    bic r1,r1,#(0x3<<16)
    str r1,[r0]
 
    ldr r0,=0x50007008
    ldr r1,[r0]
    bic r1,r1,#(0x3<<20)
    str r1,[r0]
 
    ldr r0,=0x50003008
    ldr r1,[r0]
    bic r1,r1,#(0x3<<12)
    str r1,[r0]
 
    ldr r0,=0x5000600c
    ldr r1,[r0]
    bic r1,r1,#(0x3<<20)
    bic r1,r1,#(0x3<<16)
    str r1,[r0]
    
    ldr r0,=0x5000700c
    ldr r1,[r0]
    bic r1,r1,#(0x3<<20)
    str r1,[r0]
 
    ldr r0,=0x5000300c
    ldr r1,[r0]
    bic r1,r1,#(0x3<<12)
    str r1,[r0]
 
loop:
    bl led1_on
    bl delay
    bl led1_off
    bl delay
    bl led2_on
    bl delay
    bl led2_off
    bl delay
    bl led3_on
    bl delay 
    bl led3_off
    bl delay
    bl bee_on
    bl delay
    bl bee_off
    bl delay
    b loop
 
 
led1_on:
    ldr r0,=0x50006014
    ldr r1,[r0]
    orr r1,r1,#(0x1<<10)
    str r1,[r0]    
    mov pc,lr
 led1_off:
    ldr r0,=0x50006014
    ldr r1,[r0]
    bic r1,r1,#(0x1<<10)
    str r1,[r0]    
    mov pc,lr
led2_on:
    ldr r0,=0x50007014
    ldr r1,[r0]
    orr r1,r1,#(0x1<<10)
    str r1,[r0]    
    mov pc,lr
led2_off:
    ldr r0,=0x50007014
    ldr r1,[r0]
    bic r1,r1,#(0x1<<10)
    str r1,[r0]    
    mov pc,lr
led3_on:
    ldr r0,=0x50006014
    ldr r1,[r0]
    orr r1,r1,#(0x1<<8)
    str r1,[r0]    
    mov pc,lr
led3_off:
    ldr r0,=0x50006014
    ldr r1,[r0]
    bic r1,r1,#(0x1<<8)
    str r1,[r0]    
    mov pc,lr
bee_on:
    ldr r0,=0x50003014
    ldr r1,[r0]
    orr r1,r1,#(0x1<<6)
    str r1,[r0]    
    mov pc,lr
bee_off:
    ldr r0,=0x50003014
    ldr r1,[r0]
    bic r1,r1,#(0x1<<6)
    str r1,[r0]    
    mov pc,lr
 
delay:
    ldr r1,=0x10000000
mm:
    cmp r1,#0
    subne r1,r1,#1
    bne mm
    mov pc,lr
.end
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