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Update drv_usart.c 

添加部分空行
This commit is contained in:
周传福 2019-05-17 23:23:14 +08:00 committed by GitHub
parent 9329b62bef
commit 6ebb2c75d9
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1 changed files with 4 additions and 0 deletions
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4
bsp/stm32/libraries/HAL_Drivers/drv_usart.c
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@ -222,10 +222,12 @@ static rt_size_t stm32_dma_transmit(struct rt_serial_device *serial, rt_uint8_t
RT_ASSERT(serial != RT_NULL);
uart = (struct stm32_uart *)(serial->parent.user_data);
RT_ASSERT(uart != RT_NULL);
if (size == 0)
{
return 0;
}
if (RT_SERIAL_DMA_TX == direction)
{
if (HAL_UART_Transmit_DMA(&uart->handle, buf, size) == HAL_OK)
@ -652,6 +654,7 @@ static void stm32_dma_config(struct rt_serial_device *serial, rt_ubase_t flag)
DMA_Handle->Init.MemInc = DMA_MINC_ENABLE;
DMA_Handle->Init.PeriphDataAlignment = DMA_PDATAALIGN_BYTE;
DMA_Handle->Init.MemDataAlignment = DMA_MDATAALIGN_BYTE;
if (RT_DEVICE_FLAG_DMA_RX == flag)
{
DMA_Handle->Init.Direction = DMA_PERIPH_TO_MEMORY;
@ -662,6 +665,7 @@ static void stm32_dma_config(struct rt_serial_device *serial, rt_ubase_t flag)
DMA_Handle->Init.Direction = DMA_MEMORY_TO_PERIPH;
DMA_Handle->Init.Mode = DMA_NORMAL;
}
DMA_Handle->Init.Priority = DMA_PRIORITY_MEDIUM;
#if defined(SOC_SERIES_STM32F4) || defined(SOC_SERIES_STM32F7)
DMA_Handle->Init.FIFOMode = DMA_FIFOMODE_DISABLE;