[bsp][stm32h743-nucleo] add the usart3 driver and use for console.

bsp/stm32h743-nucleo/drivers/drv_usart.c

@@ -30,6 +30,22 @@
 #define USART1_RX_GPIO_PORT              GPIOB
 #define USART1_RX_AF                     GPIO_AF7_USART1
 
+/* Definition for USART3 clock resources */
+#define USART3_CLK_ENABLE()              __USART3_CLK_ENABLE()
+#define USART3_RX_GPIO_CLK_ENABLE()      __GPIOD_CLK_ENABLE()
+#define USART3_TX_GPIO_CLK_ENABLE()      __GPIOD_CLK_ENABLE()
+
+#define USART3_FORCE_RESET()             __USART3_FORCE_RESET()
+#define USART3_RELEASE_RESET()           __USART3_RELEASE_RESET()
+
+/* Definition for USARTx Pins */
+#define USART3_TX_PIN                    GPIO_PIN_8
+#define USART3_TX_GPIO_PORT              GPIOD
+#define USART3_TX_AF                     GPIO_AF7_USART3
+#define USART3_RX_PIN                    GPIO_PIN_9
+#define USART3_RX_GPIO_PORT              GPIOD
+#define USART3_RX_AF                     GPIO_AF7_USART3
+
 /* STM32 uart driver */
 struct stm32_uart
 {
@@ -195,8 +211,33 @@ void USART1_IRQHandler(void)
     /* leave interrupt */
     rt_interrupt_leave();
 }
-#endif /* RT_USING_UART1 */
+#endif /* RT_USING_UART3 */
+#if defined(RT_USING_UART3)
+/* UART1 device driver structure */
+
+static struct stm32_uart uart3;
+struct rt_serial_device serial3;
+
+void USART3_IRQHandler(void)
+{
+    struct stm32_uart *uart;
+
+    uart = &uart3;
+
+    /* enter interrupt */
+    rt_interrupt_enter();
 
+    /* UART in mode Receiver ---------------------------------------------------*/
+    if ((__HAL_UART_GET_IT(&uart->UartHandle, UART_IT_RXNE) != RESET) && (__HAL_UART_GET_IT_SOURCE(&uart->UartHandle, UART_IT_RXNE) != RESET))
+    {
+        rt_hw_serial_isr(&serial3, RT_SERIAL_EVENT_RX_IND);
+        /* Clear RXNE interrupt flag */
+        __HAL_UART_SEND_REQ(&uart->UartHandle, UART_RXDATA_FLUSH_REQUEST);
+    }
+    /* leave interrupt */
+    rt_interrupt_leave();
+}
+#endif /* RT_USING_UART3 */
 /**
   * @brief UART MSP Initialization
   *        This function configures the hardware resources used in this example:
@@ -233,6 +274,31 @@ void HAL_UART_MspInit(UART_HandleTypeDef *huart)
         /* NVIC for USART */
         HAL_NVIC_SetPriority(USART1_IRQn, 0, 1);
         HAL_NVIC_EnableIRQ(USART1_IRQn);
+    }
+		    if (huart->Instance == USART3)
+    {
+        /* Enable GPIO TX/RX clock */
+        USART3_TX_GPIO_CLK_ENABLE();
+        USART3_RX_GPIO_CLK_ENABLE();
+        /* Enable USARTx clock */
+        USART3_CLK_ENABLE();
+
+        /* UART TX GPIO pin configuration  */
+        GPIO_InitStruct.Pin       = USART3_TX_PIN;
+        GPIO_InitStruct.Mode      = GPIO_MODE_AF_PP;
+        GPIO_InitStruct.Pull      = GPIO_PULLUP;
+        GPIO_InitStruct.Speed     = GPIO_SPEED_FREQ_VERY_HIGH;
+        GPIO_InitStruct.Alternate = USART3_TX_AF;
+        HAL_GPIO_Init(USART3_TX_GPIO_PORT, &GPIO_InitStruct);
+
+        /* UART RX GPIO pin configuration  */
+        GPIO_InitStruct.Pin = USART3_RX_PIN;
+        GPIO_InitStruct.Alternate = USART3_RX_AF;
+        HAL_GPIO_Init(USART3_RX_GPIO_PORT, &GPIO_InitStruct);
+
+        /* NVIC for USART */
+        HAL_NVIC_SetPriority(USART3_IRQn, 0, 1);
+        HAL_NVIC_EnableIRQ(USART3_IRQn);
     }
 }
 
@@ -260,6 +326,21 @@ void HAL_UART_MspDeInit(UART_HandleTypeDef *huart)
 
         /* Disable the NVIC for UART */
         HAL_NVIC_DisableIRQ(USART1_IRQn);
+    }
+		    if (huart->Instance == USART3)
+    {
+        /* Reset peripherals */
+        USART3_FORCE_RESET();
+        USART3_RELEASE_RESET();
+
+        /* Disable peripherals and GPIO Clocks */
+        /* Configure UART Tx as alternate function  */
+        HAL_GPIO_DeInit(USART3_TX_GPIO_PORT, USART3_TX_PIN);
+        /* Configure UART Rx as alternate function  */
+        HAL_GPIO_DeInit(USART3_RX_GPIO_PORT, USART3_RX_PIN);
+
+        /* Disable the NVIC for UART */
+        HAL_NVIC_DisableIRQ(USART3_IRQn);
     }
 }
 
@@ -280,7 +361,18 @@ int stm32_hw_usart_init(void)
                           RT_DEVICE_FLAG_RDWR | RT_DEVICE_FLAG_INT_RX,
                           uart);
 #endif /* RT_USING_UART1 */
+#ifdef RT_USING_UART3
+    uart = &uart3;
+    uart->UartHandle.Instance = USART3;
 
+    serial3.ops    = &stm32_uart_ops;
+    serial3.config = config;
+
+    /* register UART3 device */
+    rt_hw_serial_register(&serial3, "uart3",
+                          RT_DEVICE_FLAG_RDWR | RT_DEVICE_FLAG_INT_RX,
+                          uart);
+#endif /* RT_USING_UART3 */
     return 0;
 }
 INIT_BOARD_EXPORT(stm32_hw_usart_init);

bsp/stm32h743-nucleo/rtconfig.h

@@ -56,7 +56,7 @@
 /* RT_USING_INTERRUPT_INFO is not set */
 #define RT_USING_CONSOLE
 #define RT_CONSOLEBUF_SIZE 128
-#define RT_CONSOLE_DEVICE_NAME "uart1"
+#define RT_CONSOLE_DEVICE_NAME "uart3"
 
 /* RT-Thread Components */