(ARM Cortex-A7) T113-S3 (MangoPi MQ-R) >> Assembly

Button

---

Button連接到PC4(SPI_MOSI)腳位


GPIO位址


PC_CFG0


PC_DAT


PC_PULL0


main.s

  .global _start
  
  .equ GPIO_BASE, 0x02000000
  .equ PC_CFG0,  (GPIO_BASE + 0x60)
  .equ PC_DAT,   (GPIO_BASE + 0x70)
  .equ PC_PULL0, (GPIO_BASE + 0x84)
  .equ PD_CFG2,  (GPIO_BASE + 0x98)
  .equ PD_DAT,   (GPIO_BASE + 0xa0)
   
  .arm
  .text
_start:
  .long 0xea000016
  .byte 'e', 'G', 'O', 'N', '.', 'B', 'T', '0'
  .long 0, __spl_size
  .byte 'S', 'P', 'L', 2
  .long 0, 0
  .long 0, 0, 0, 0, 0, 0, 0, 0
  .long 0, 0, 0, 0, 0, 0, 0, 0
   
_vector:
  b reset
  b .
  b .
  b .
  b .
  b .
  b .
  b .
   
reset:
  ldr r0, =PC_CFG0
  ldr r1, =0x00000000
  str r1, [r0]
  
  ldr r0, =PC_PULL0
  ldr r1, =0x00000100
  str r1, [r0]

  ldr r0, =PD_CFG2
  ldr r1, =0x01000000
  str r1, [r0]
 
  ldr r0, =PC_DAT
  ldr r1, =PD_DAT
0:
  ldr r2, [r0]
  lsl r2, #18
  str r2, [r1]
  b 0b
  .end

完成

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