Game & Watch: Super Mario Bros. >> Assembly
Button
參考資訊：
1. pm_pdf
2. ds_pdf
3. game-and-watch-backup
4. game-and-watch-flashloader
按鍵腳位
Clock
Mode
Pull-up
Input
main.s
.equiv PORTD_BASE, 0x58020c00 .equiv PORTE_BASE, 0x58021000 .equiv GPIO_MODER, 0x0000 .equiv GPIO_PUPDR, 0x000c .equiv GPIO_IDR, 0x0010 .equiv GPIO_ODR, 0x0014 .equiv RCC_BASE, 0x58024400 .equiv RCC_AHB4ENR, 0x0140 .thumb .cpu cortex-m7 .syntax unified .global _start .text .org 0x0000 _start: .word 0x20020000 .word reset .org 0x0100 .thumb_func reset: ldr r0, =RCC_BASE ldr r1, [r0, #RCC_AHB4ENR] orr r1, #(1 << 4) | (1 << 3) str r1, [r0, #RCC_AHB4ENR] ldr r0, =PORTD_BASE ldr r1, =0 str r1, [r0, #GPIO_MODER] ldr r1, =(1 << 18) str r1, [r0, #GPIO_PUPDR] ldr r0, =PORTE_BASE ldr r1, =(1 << 22) str r1, [r0, #GPIO_MODER] ldr r1, =(0 << 11) str r1, [r0, #GPIO_ODR] 0: ldr r0, =PORTD_BASE ldr r1, [r0, #GPIO_IDR] lsl r1, #2 ldr r0, =PORTE_BASE str r1, [r0, #GPIO_ODR] b 0b .end
完成
