S3C44B0X >> Assembly

Button


參考資訊:
1. pm_pdf

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


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