Game & Watch: The Legend of Zelda >> Assembly
Battery Charging Indicator
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
電池充電電路
| PE8 | 0(開始充電) | 1(停止充電) |
| PA2 | 0(有效電源) | 1(無效電源) |
| PE7 | 0(充電中) | 1(充電完成) |
BQ24072RGT
main.s
.equiv PORTA_BASE, 0x58020000 .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, #0x1f str r1, [r0, #RCC_AHB4ENR] ldr r0, =PORTA_BASE ldr r1, =0xa9000000 | (1 << 12) | (1 << 8) str r1, [r0, #GPIO_MODER] ldr r0, =PORTE_BASE ldr r1, =(1 << 22) str r1, [r0, #GPIO_MODER] ldr r1, =(1 << 11) str r1, [r0, #GPIO_ODR] 0: ldr r0, =PORTA_BASE ldr r1, [r0, #GPIO_IDR] lsl r1, #4 and r1, #(1 << 6) eor r1, #(1 << 6) ldr r0, =PORTE_BASE ldr r2, [r0, #GPIO_IDR] lsr r2, #3 and r2, #(1 << 4) eor r2, #(1 << 4) orr r1, r2 ldr r0, =PORTA_BASE str r1, [r0, #GPIO_ODR] b 0b .end
屏背光有三顆LED(PA6、PA5、PA4)，PA6用來指示有效電源，PA4用來代表充電狀態
拔掉USB-TypeC後
完成充電後
