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1)IO 访问往地址0x2E写数值0x87,连续写入两次:
IoWrite8(0x2E,0x87);
IoWrite8(0x2E,0x87);
2)选择Watch Dog逻辑设备并激活Watch Dog(设置0x30寄存器的bit0即可):
IoWrite8(0x2E,0x07);
IoWrite8(0x2F,0x08); //逻辑设备0x08
IoWrite8(0x2E,0x30);
IoWrite8(0x2F, (IoRead8(0x2F)| 0x01)); //激活Watch Dog
3)设置Watch Dog计数单位为分钟还是秒钟(设置0xF5寄存器的bit3即可):
IoWrite8(0x2E,0xF5);
IoWrite8(0x2F,(IoRead8(0x2F)& 0xF7)); //这里以秒钟计数为例(设置bit3为0),分钟则设置bit3为1即可
4)设置计数时间(往0xF6写所需要的时间值即可):
IoWrite8(0x2E,0xF6);
IoWrite8(0x2F,value); //value为所设置的时间值大小
5)退出IO访问:
IoWrite8(0x2E,0xAA);