Game & Watch: The Legend of Zelda >> Assembly
LCD Backlight
參考資訊：
1. pm_pdf
2. ds_pdf
3. game-and-watch-backup
4. game-and-watch-hardware
5. game-and-watch-flashloader
LCD背光電路
main.s
.equiv PORTA_BASE, 0x58020000 .equiv GPIO_MODER, 0x0000 .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, #0x1f str r1, [r0, #RCC_AHB4ENR] ldr r0, =PORTA_BASE ldr r1, =0xa9555555 str r1, [r0, #GPIO_MODER] ldr r1, =0x0000 str r1, [r0, #GPIO_ODR] ldr r3, =(1 << 6) | (1 << 5) | (1 << 4) 0: eor r1, r3 str r1, [r0, #GPIO_ODR] ldr r2, =0x2000000 1: subs r2, #1 bne 1b b 0b .end
完成
