问题如题,SPI发送数据没问题,但是 没有接收到任何值,我发送的是读取ACR寄存器的值 片选一直是低
用的是stm32f105
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问题如题,SPI发送数据没问题,但是 没有接收到任何值,我发送的是读取ACR寄存器的值 片选一直是低
用的是stm32f105
供电电压是3.3v 信号连接也没问题,时序 如图,图内信息是 cs 片选和 读写操作一次的sck