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_hal_uart_spi.c

lily li1
Expert 1230 points


 _hal_uart_spi.c里面的DMA_PAD是用来做什么的啊，为什么在发送数据前要执行下面的语句？

(void)memset(spiRxBuf, (DMA_PAD ^ 0xFF), SPI_MAX_PKT_LEN * sizeof(uint16));