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[stm32][drv_spi] 优化spi单工发送, 不对接收buffer操作 

否则可能影响上层应用的接收/发送buffer

attach: afcc400
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Man, Jianting (Meco) 2023-05-31 21:54:45 -04:00 committed by GitHub
parent 62afa5a9dc
commit 1638241297
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bsp/stm32/libraries/HAL_Drivers/drv_spi.c
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@ -367,7 +367,6 @@ static rt_ssize_t spixfer(struct rt_spi_device *device, struct rt_spi_message *m
else if ((spi_drv->spi_dma_flag & SPI_USING_TX_DMA_FLAG))
{
/* same as Tx ONLY. It will not receive SPI data any more. */
rt_memset((uint8_t *)recv_buf, 0xff, send_length);
state = HAL_SPI_Transmit_DMA(spi_handle, (uint8_t *)send_buf, send_length);
}
else if ((spi_drv->spi_dma_flag & SPI_USING_RX_DMA_FLAG))