是的，我将SPI_EndRxTxTransaction函数中的等待BSY位的阻塞部分注释掉，就不再发生这个情况了。 /* Wait BSY flag during 1 Byte time transfer in case of Full-Duplex and Tx transfer * If Timeout is reached, the transfer is considered as finish. * User have to calculate the timeout value to fit with the time of 1 byte transfer. * This time is directly link with the SPI clock from Master device. */ 看注释，需要修改宏SPI_BSY_FLAG_WORKAROUND_TIMEOUT的值，用来匹配1字节的通信时间。我们的波特率为8MHz左右，那么通信1字节需要1us左右。而HAL库默认是1000us，因此经常在此阻塞，直到超时，或者到下一帧的第一个字节被HAL库接收。 line217 #define SPI_DEFAULT_TIMEOUT 100U line218 #define SPI_BSY_FLAG_WORKAROUND_TIMEOUT 3U /*!< Timeout 1000 µs */
