微處理器 - Samsung S3C44B0X - Assembly - Button

按鍵連接到GPG-6


暫存器


main.s

    .equiv PCONG, 0x1d20040
    .equiv PDATG, 0x1d20044
 
    .text
    .global _start
_start:    b reset
_undef:    b .
_swi:      b .
_pabort:   b .
_dabort:   b .
_reserved: b .
_irq:      b .
_fiq:      b .
 
reset:
    ldr r0, =PCONG
    ldr r1, =(1 << 10)
    str r1, [r0]
 
    ldr r0, =PDATG
0:
    ldr r1, [r0]
    lsr r1, #1
    str r1, [r0]
    b 0b
    .end

完成