我要用McBSP1 但是McBSP1 得寄存器的值没法写进去,PERCFG0这个寄存器已经使能McBSP1 位;02AC 0018 PERSTAT1 Peripheral Status Register 1 这个寄存器 读出的值 显示McBSP1 位是使能着。复用引脚也是拉高的。就是没法向寄存器中写入数据
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