Update drv_usart.c

修复RX DMA 第一包收不到的bug

Update drv_usart.c
修复RX DMA 第一包收不到的bug
9c6d8d96 · ItsGettingWorse · mysterywolf · 11f52eeb · 9c6d8d96
隐藏空白更改
内联并排

Showing with 1 addition and 1 deletion

bsp/stm32/libraries/HAL_Drivers/drv_usart.c bsp/stm32/libraries/HAL_Drivers/drv_usart.c +1 -1

未找到文件。
--- a/bsp/stm32/libraries/HAL_Drivers/drv_usart.c
+++ b/bsp/stm32/libraries/HAL_Drivers/drv_usart.c
@@ -170,7 +170,7 @@ static rt_err_t stm32_configure(struct rt_serial_device *serial, struct serial_c

 #ifdef RT_SERIAL_USING_DMA
    if (!(serial->parent.open_flag & RT_DEVICE_OFLAG_OPEN)) {
-        uart->dma_rx.remaining_cnt = 0;
+        uart->dma_rx.remaining_cnt = cfg->bufsz;
    }
 #endif