STM32F103 >> Assembly
Button
參考資料：
1. pdf
RCC_APB2ENR暫存器，需要開啟GPIO-B、GPIO-C的Clock
LED位置是PC13，設定成Output 50MHz，按鍵則是PB10，設定成Pull-Up
輸出資料
輸入資料
main.s
.thumb .cpu cortex-m3 .syntax unified .equ GPIOB_CRL, 0x40010c00 .equ GPIOB_CRH, 0x40010c04 .equ GPIOB_IDR, 0x40010c08 .equ GPIOB_ODR, 0x40010c0c .equ GPIOB_BSRR, 0x40010c10 .equ GPIOB_BRR, 0x40010c14 .equ GPIOB_LCKR, 0x40010c18 .equ GPIOC_CRL, 0x40011000 .equ GPIOC_CRH, 0x40011004 .equ GPIOC_IDR, 0x40011008 .equ GPIOC_ODR, 0x4001100c .equ GPIOC_BSRR, 0x40011010 .equ GPIOC_BRR, 0x40011014 .equ GPIOC_LCKR, 0x40011018 .equ RCC_APB2ENR, 0x40021018 .equ STACKINIT, 0x20005000 .global _start .section .text .org 0x0 .word STACKINIT .word _start .org 0x100 .align 2 .thumb_func _start: ldr r0, =0x00000018 ldr r1, =RCC_APB2ENR str r0, [r1] ldr r0, =GPIOB_CRH ldr r1, =(2 << 10) str r1, [r0] ldr r0, =GPIOB_ODR ldr r1, =(1 << 10) str r1, [r0] ldr r0, =GPIOC_CRH ldr r1, =(3 << 20) str r1, [r0] loop: ldr r0, =GPIOB_IDR ldr r1, [r0] and r1, 0x400 lsl r1, 3 ldr r0, =GPIOC_ODR str r1, [r0] b loop .end
完成
