[bsp] fix UART DMA TX

bsp/stm32/libraries/HAL_Drivers/config/l4/uart_config.h

@@ -61,7 +61,19 @@ extern "C" {
     }
 #endif /* UART1_DMA_RX_CONFIG */
 #endif /* BSP_UART1_RX_USING_DMA */  
-   
+
+#if defined(BSP_UART1_TX_USING_DMA)
+#ifndef UART1_DMA_TX_CONFIG
+#define UART1_DMA_TX_CONFIG                                            \
+    {                                                               \
+        .Instance = UART1_TX_DMA_INSTANCE,                          \
+        .request  = UART1_TX_DMA_REQUEST,                           \
+        .dma_rcc  = UART1_TX_DMA_RCC,                               \
+        .dma_irq  = UART1_TX_DMA_IRQ,                               \
+    }
+#endif /* UART1_DMA_TX_CONFIG */
+#endif /* BSP_UART1_TX_USING_DMA */
+
 #if defined(BSP_USING_UART2)
 #ifndef UART2_CONFIG
 #define UART2_CONFIG                                                \
@@ -85,6 +97,18 @@ extern "C" {
 #endif /* UART2_DMA_RX_CONFIG */
 #endif /* BSP_UART2_RX_USING_DMA */
 
+#if defined(BSP_UART2_TX_USING_DMA)
+#ifndef UART2_DMA_TX_CONFIG
+#define UART2_DMA_TX_CONFIG                                            \
+    {                                                               \
+        .Instance = UART2_TX_DMA_INSTANCE,                          \
+        .request  = UART2_TX_DMA_REQUEST,                           \
+        .dma_rcc  = UART2_TX_DMA_RCC,                               \
+        .dma_irq  = UART2_TX_DMA_IRQ,                               \
+    }
+#endif /* UART2_DMA_TX_CONFIG */
+#endif /* BSP_UART2_TX_USING_DMA */
+
 #if defined(BSP_USING_UART3)
 #ifndef UART3_CONFIG
 #define UART3_CONFIG                                                \
@@ -108,6 +132,18 @@ extern "C" {
 #endif /* UART3_DMA_RX_CONFIG */
 #endif /* BSP_UART3_RX_USING_DMA */
 
+#if defined(BSP_UART3_TX_USING_DMA)
+#ifndef UART3_DMA_TX_CONFIG
+#define UART3_DMA_TX_CONFIG                                            \
+    {                                                               \
+        .Instance = UART3_TX_DMA_INSTANCE,                          \
+        .request  = UART3_TX_DMA_REQUEST,                           \
+        .dma_rcc  = UART3_TX_DMA_RCC,                               \
+        .dma_irq  = UART3_TX_DMA_IRQ,                               \
+    }
+#endif /* UART3_DMA_TX_CONFIG */
+#endif /* BSP_UART3_TX_USING_DMA */
+
 #ifdef __cplusplus
 }
 #endif 

bsp/stm32/libraries/HAL_Drivers/drv_usart.c

@@ -870,12 +870,36 @@ void HAL_UART_RxHalfCpltCallback(UART_HandleTypeDef *huart)
     uart = (struct stm32_uart *)huart;
     dma_isr(&uart->serial);
 }
+
+static void _dma_tx_complete(struct rt_serial_device *serial)
+{
+    struct stm32_uart *uart;
+    rt_size_t trans_total_index;
+    rt_base_t level;
+
+    RT_ASSERT(serial != RT_NULL);
+    uart = rt_container_of(serial, struct stm32_uart, serial);
+
+    if ((__HAL_DMA_GET_IT_SOURCE(&(uart->dma_tx.handle), DMA_IT_TC) != RESET) ||
+            (__HAL_DMA_GET_IT_SOURCE(&(uart->dma_tx.handle), DMA_IT_HT) != RESET))
+    {
+        level = rt_hw_interrupt_disable();
+        trans_total_index = __HAL_DMA_GET_COUNTER(&(uart->dma_tx.handle));
+        rt_hw_interrupt_enable(level);
+
+        if (trans_total_index == 0)
+        {
+            rt_hw_serial_isr(serial, RT_SERIAL_EVENT_TX_DMADONE);
+        }
+    }
+}
+
 void HAL_UART_TxCpltCallback(UART_HandleTypeDef *huart)
 {
     struct stm32_uart *uart;
     RT_ASSERT(huart != NULL);
     uart = (struct stm32_uart *)huart;
-    rt_hw_serial_isr(&uart->serial, RT_SERIAL_EVENT_TX_DMADONE);
+    _dma_tx_complete(&uart->serial);
 }
 #endif  /* RT_SERIAL_USING_DMA */