微處理器 - MediaTek MT7688 (LinkIt Smart 7688 Duo) - Assembly - Button


WIFI RESET按鍵是連接到WDT_RST_N


WDT_RST_N腳位是GPIO-38


WDT_MODE可以設定WDT_RST_N腳位模式



GPIO方向設定


GPIO資料


main.s

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    .extern _start
    .set noreorder
 
    .equiv GPIO1_MODE,  0xb0000060
    .equiv GPIO_CTRL_1, 0xb0000604
    .equiv GPIO_DATA_1, 0xb0000624
    .equiv WDT_MODE,    14
    .equiv LED,         (44 - 32)
 
    .text
_start:
    b reset
 
    .org 0x400
reset:
    li $8, GPIO1_MODE
    lw $9, 0($8)
    or $9, (1 << WDT_MODE)
    sw $9, 0($8)
 
    li $8, GPIO_CTRL_1
    li $9, (1 << LED)
    sw $9, 0($8)
     
loop:
    li $8, GPIO_DATA_1
    lw $9, 0($8)
    sll $9, 6
    sw $9, 0($8)
    b loop
    nop

完成