建立工程，成功创建两个虚拟串口

source/OpenAMP/virtual_driver/virt_uart.c

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+/**
+  ******************************************************************************
+  * @file    virt_uart.c
+  * @author  MCD Application Team
+  * @brief   UART HAL module driver.
+  *          This file provides firmware functions to manage an rpmsg endpoint
+  *          from user application
+  *
+  *
+  @verbatim
+ ===============================================================================
+                        ##### How to use this driver #####
+ ===============================================================================
+  [..]
+    The VIRTUAL UART driver can be used as follows:
+    (#) Initialize the Virtual UART by calling the VIRT_UART_Init() API.
+        (++) create an endpoint. listener on the OpenAMP-rpmsg channel is now enabled.
+        Receive data  is now possible if user registers a callback to this VIRTUAL UART instance
+        by calling in providing a callback function when a message is received from
+        remote processor (VIRT_UART_read_cb)
+        OpenAMP MW deals with memory allocation/free and signal events
+    (#) Transmit data on the created rpmsg channel by calling the VIRT_UART_Transmit()
+    (#) Receive data in calling VIRT_UART_RegisterCallback to register user callback
+
+
+  @endverbatim
+  ******************************************************************************
+  * @attention
+  *
+  * <h2><center>&copy; Copyright (c) 2019 STMicroelectronics.
+  * All rights reserved.</center></h2>
+  *
+  * This software component is licensed by ST under BSD 3-Clause license,
+  * the "License"; You may not use this file except in compliance with the
+  * License. You may obtain a copy of the License at:
+  *                        opensource.org/licenses/BSD-3-Clause
+  *
+  ******************************************************************************
+  */
+
+/* Includes ------------------------------------------------------------------*/
+#include "virt_uart.h"
+#include "metal/utilities.h"
+
+
+/* Private typedef -----------------------------------------------------------*/
+/* Private define ------------------------------------------------------------*/
+/* this string will be sent to remote processor */
+#define RPMSG_SERVICE_NAME              "rpmsg-tty-channel"
+
+/* Private macro -------------------------------------------------------------*/
+/* Private variables ---------------------------------------------------------*/
+
+static int VIRT_UART_read_cb(struct rpmsg_endpoint *ept, void *data,
+			    size_t len, uint32_t src, void *priv)
+{
+  VIRT_UART_HandleTypeDef *huart = metal_container_of(ept, VIRT_UART_HandleTypeDef, ept);
+  (void)src;
+
+  huart->pRxBuffPtr = data;
+  huart->RxXferSize = len;
+  if (huart->RxCpltCallback != NULL) {
+    huart->RxCpltCallback(huart);
+  }
+
+  return 0;
+}
+
+VIRT_UART_StatusTypeDef VIRT_UART_Init(VIRT_UART_HandleTypeDef *huart)
+{
+
+  int status;
+
+  /* Create a endpoint for rmpsg communication */
+
+  status = OPENAMP_create_endpoint(&huart->ept, RPMSG_SERVICE_NAME, RPMSG_ADDR_ANY,
+		  	  	  	  	  	  	   VIRT_UART_read_cb, NULL);
+
+  if(status < 0) {
+    return VIRT_UART_ERROR;
+  }
+
+  return VIRT_UART_OK;
+}
+
+VIRT_UART_StatusTypeDef VIRT_UART_DeInit (VIRT_UART_HandleTypeDef *huart)
+{
+  OPENAMP_destroy_ept(&huart->ept);
+
+  return VIRT_UART_OK;
+}
+
+VIRT_UART_StatusTypeDef VIRT_UART_RegisterCallback(VIRT_UART_HandleTypeDef *huart,
+                                                   VIRT_UART_CallbackIDTypeDef CallbackID,
+                                                   void (* pCallback)(VIRT_UART_HandleTypeDef *_huart))
+{
+  VIRT_UART_StatusTypeDef status = VIRT_UART_OK;
+
+  switch (CallbackID)
+  {
+  case VIRT_UART_RXCPLT_CB_ID :
+    huart->RxCpltCallback = pCallback;
+    break;
+
+  default :
+   /* Return error status */
+    status =  VIRT_UART_ERROR;
+    break;
+  }
+  return status;
+
+  return VIRT_UART_OK;
+}
+
+VIRT_UART_StatusTypeDef VIRT_UART_Transmit(VIRT_UART_HandleTypeDef *huart, uint8_t *pData, uint16_t Size)
+{
+	int res;
+
+	if (Size > (RPMSG_BUFFER_SIZE-16))
+	  return VIRT_UART_ERROR;
+
+	res = OPENAMP_send(&huart->ept, pData, Size);
+	if (res <0) {
+		return VIRT_UART_ERROR;
+	}
+
+	return VIRT_UART_OK;
+}