F1C100S >> Assembly
Watchdog
參考資料：
1. pdf
2. lichee
3. mangopi_r
4. allwinner
Work Flow
暫存器
main.s
.global _start .equiv GPIO_BASE, 0x01c20800 .equiv TIMER_BASE, 0x01c20c00 .equiv PE, (0x24 * 4) .equiv PORT_CFG0, 0x00 .equiv PORT_DATA, 0x10 .equiv WDOG_IRQ_EN_REG, 0xa0 .equiv WDOG_IRQ_STA_REG, 0xa4 .equiv WDOG_CTRL_REG, 0xb0 .equiv WDOG_CFG_REG, 0xb4 .equiv WDOG_MODE_REG, 0xb8 .arm .text _start: .long 0xea000016 .byte 'e', 'G', 'O', 'N', '.', 'B', 'T', '0' .long 0, __spl_size .byte 'S', 'P', 'L', 2 .long 0, 0 .long 0, 0, 0, 0, 0, 0, 0, 0 .long 0, 0, 0, 0, 0, 0, 0, 0 _vector: b reset b . b . b . b . b . b . b . reset: ldr r0, =GPIO_BASE ldr r1, =0x00010000 str r1, [r0, #(PE + PORT_CFG0)] ldr r1, =0x00 str r1, [r0, #(PE + PORT_DATA)] ldr r0, =TIMER_BASE ldr r1, =(0xa57 << 1) | 1 str r1, [r0, #WDOG_CTRL_REG] ldr r1, =1 str r1, [r0, #WDOG_CFG_REG] ldr r1, =(1 << 4) | 1 str r1, [r0, #WDOG_MODE_REG] 0: nop b 0b .end
P.S. 點亮LED後，等待Watchdog(1秒)去重啟系統，達到閃爍LED的效果
完成
