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您好，我在使用controlsuite中的blinky_cpu1程序，想更改引脚驱动外设的灯，但是引脚电压一直为0，只能点亮板载的灯，换用寄存器驱动还是不行，麻烦可以给解答一下，修改了很多次还是不行，谢谢了！
