STM32F429 >> Assembly
Button
參考資訊：
1. ds_pdf
2. pm_pdf
3. kit_pdf
Button測試使用B1 USER(PA-0)
GPIO-A Clock
Mode
Pull-up
Input
main.s
.equiv PORTA_BASE, 0x40020000 .equiv PORTG_BASE, 0x40021800 .equiv GPIO_MODER, 0x0000 .equiv GPIO_PUPDR, 0x000c .equiv GPIO_IDR, 0x0010 .equiv GPIO_ODR, 0x0014 .equiv RCC_BASE, 0x40023800 .equiv RCC_AHB1ENR, 0x0030 .thumb .cpu cortex-m4 .syntax unified .global _start .text .org 0x0000 _start: .word 0x20008000 .word reset .org 0x0100 .thumb_func reset: ldr r0, =RCC_BASE ldr r1, [r0, #RCC_AHB1ENR] orr r1, #(1 << 6) | (1 << 0) str r1, [r0, #RCC_AHB1ENR] ldr r0, =PORTG_BASE ldr r1, =(1 << 26) str r1, [r0, #GPIO_MODER] ldr r0, =PORTA_BASE ldr r1, [r0, #GPIO_MODER] bic r1, #3 str r1, [r0, #GPIO_MODER] ldr r1, [r0, #GPIO_PUPDR] bic r1, #3 orr r1, #2 str r1, [r0, #GPIO_PUPDR] 0: ldr r0, =PORTA_BASE ldr r1, [r0, #GPIO_IDR] lsl r1, #13 ldr r0, =PORTG_BASE str r1, [r0, #GPIO_ODR] b 0b .end
完成
