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TMS320F2800137: SPI的CLK信号启动发送数据前,下拉了一一瞬间

Part Number: TMS320F2800137

我在调用F2800137的库函数SPI的SPI_pollingFIFOTransaction()函数进行测试,然后发现CLK在启动前下拉了一下。 ,但是我手动往寄存器里面填充数据的时候,就没有出现这样的情况,但是也能够发送数据