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您好!请问一下,我现在用的是IO口模拟SPI进行读写数据,我的但是现在读的都是0XFFFFFFFF,请问应该怎么配置我的IO口呢,我现在设置的DOUT和ADRDRY是输入上拉,其他的都是推挽输出,请问这样配置有问题吗?