建立工程，成功创建两个虚拟串口
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ranchuan
128
source/OpenAMP/virtual_driver/virt_uart.c
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128
source/OpenAMP/virtual_driver/virt_uart.c
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/**
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******************************************************************************
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* @file virt_uart.c
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* @author MCD Application Team
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* @brief UART HAL module driver.
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* This file provides firmware functions to manage an rpmsg endpoint
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* from user application
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*
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*
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@verbatim
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===============================================================================
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##### How to use this driver #####
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===============================================================================
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[..]
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The VIRTUAL UART driver can be used as follows:
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(#) Initialize the Virtual UART by calling the VIRT_UART_Init() API.
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(++) create an endpoint. listener on the OpenAMP-rpmsg channel is now enabled.
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Receive data is now possible if user registers a callback to this VIRTUAL UART instance
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by calling in providing a callback function when a message is received from
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remote processor (VIRT_UART_read_cb)
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OpenAMP MW deals with memory allocation/free and signal events
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(#) Transmit data on the created rpmsg channel by calling the VIRT_UART_Transmit()
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(#) Receive data in calling VIRT_UART_RegisterCallback to register user callback
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@endverbatim
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******************************************************************************
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* @attention
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*
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* <h2><center>© Copyright (c) 2019 STMicroelectronics.
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* All rights reserved.</center></h2>
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*
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* This software component is licensed by ST under BSD 3-Clause license,
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* the "License"; You may not use this file except in compliance with the
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* License. You may obtain a copy of the License at:
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* opensource.org/licenses/BSD-3-Clause
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*
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******************************************************************************
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*/
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/* Includes ------------------------------------------------------------------*/
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#include "virt_uart.h"
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#include "metal/utilities.h"
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/* Private typedef -----------------------------------------------------------*/
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/* Private define ------------------------------------------------------------*/
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/* this string will be sent to remote processor */
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#define RPMSG_SERVICE_NAME "rpmsg-tty-channel"
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/* Private macro -------------------------------------------------------------*/
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/* Private variables ---------------------------------------------------------*/
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static int VIRT_UART_read_cb(struct rpmsg_endpoint *ept, void *data,
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size_t len, uint32_t src, void *priv)
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{
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VIRT_UART_HandleTypeDef *huart = metal_container_of(ept, VIRT_UART_HandleTypeDef, ept);
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(void)src;
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huart->pRxBuffPtr = data;
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huart->RxXferSize = len;
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if (huart->RxCpltCallback != NULL) {
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huart->RxCpltCallback(huart);
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}
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return 0;
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}
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VIRT_UART_StatusTypeDef VIRT_UART_Init(VIRT_UART_HandleTypeDef *huart)
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{
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int status;
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/* Create a endpoint for rmpsg communication */
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status = OPENAMP_create_endpoint(&huart->ept, RPMSG_SERVICE_NAME, RPMSG_ADDR_ANY,
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VIRT_UART_read_cb, NULL);
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if(status < 0) {
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return VIRT_UART_ERROR;
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}
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return VIRT_UART_OK;
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}
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VIRT_UART_StatusTypeDef VIRT_UART_DeInit (VIRT_UART_HandleTypeDef *huart)
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{
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OPENAMP_destroy_ept(&huart->ept);
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return VIRT_UART_OK;
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}
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VIRT_UART_StatusTypeDef VIRT_UART_RegisterCallback(VIRT_UART_HandleTypeDef *huart,
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VIRT_UART_CallbackIDTypeDef CallbackID,
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void (* pCallback)(VIRT_UART_HandleTypeDef *_huart))
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{
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VIRT_UART_StatusTypeDef status = VIRT_UART_OK;
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switch (CallbackID)
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{
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case VIRT_UART_RXCPLT_CB_ID :
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huart->RxCpltCallback = pCallback;
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break;
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default :
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/* Return error status */
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status = VIRT_UART_ERROR;
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break;
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}
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return status;
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return VIRT_UART_OK;
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}
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VIRT_UART_StatusTypeDef VIRT_UART_Transmit(VIRT_UART_HandleTypeDef *huart, uint8_t *pData, uint16_t Size)
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{
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int res;
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if (Size > (RPMSG_BUFFER_SIZE-16))
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return VIRT_UART_ERROR;
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res = OPENAMP_send(&huart->ept, pData, Size);
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if (res <0) {
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return VIRT_UART_ERROR;
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}
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return VIRT_UART_OK;
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}
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76
source/OpenAMP/virtual_driver/virt_uart.h
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76
source/OpenAMP/virtual_driver/virt_uart.h
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@@ -0,0 +1,76 @@
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/**
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******************************************************************************
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* @file virt_uart.h
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* @author MCD Application Team
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* @brief Header file of UART VIRT module.
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******************************************************************************
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* @attention
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*
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* <h2><center>© Copyright (c) 2019 STMicroelectronics.
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* All rights reserved.</center></h2>
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*
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* This software component is licensed by ST under BSD 3-Clause license,
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* the "License"; You may not use this file except in compliance with the
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* License. You may obtain a copy of the License at:
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* opensource.org/licenses/BSD-3-Clause
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*
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******************************************************************************
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*/
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/* Define to prevent recursive inclusion -------------------------------------*/
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#ifndef __VIRT_UART_H
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#define __VIRT_UART_H
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#ifdef __cplusplus
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extern "C" {
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#endif
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/* Includes ------------------------------------------------------------------*/
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#include "openamp.h"
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/* Exported structures --------------------------------------------------------*/
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typedef struct __VIRT_UART_HandleTypeDef
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{
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struct rpmsg_endpoint ept; /*!< rpmsg endpoint */
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struct rpmsg_virtio_device *rvdev; /*< pointer to the rpmsg virtio device */
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uint8_t *pRxBuffPtr; /*!< Pointer to VIRTUAL UART Rx transfer Buffer */
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uint16_t RxXferSize; /*!< VIRTUAL UART Rx Transfer size */
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void (* RxCpltCallback)( struct __VIRT_UART_HandleTypeDef * hppp); /*!< RX CPLT callback */
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}VIRT_UART_HandleTypeDef;
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typedef enum
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{
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VIRT_UART_OK = 0x00U,
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VIRT_UART_ERROR = 0x01U,
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VIRT_UART_BUSY = 0x02U,
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VIRT_UART_TIMEOUT = 0x03U
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} VIRT_UART_StatusTypeDef;
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typedef enum
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{
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VIRT_UART_RXCPLT_CB_ID = 0x00U, /*!< PPP event 1 callback ID */
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}VIRT_UART_CallbackIDTypeDef;
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/* Exported functions --------------------------------------------------------*/
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/* Initialization and de-initialization functions ****************************/
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VIRT_UART_StatusTypeDef VIRT_UART_Init(VIRT_UART_HandleTypeDef *huart);
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VIRT_UART_StatusTypeDef VIRT_UART_DeInit (VIRT_UART_HandleTypeDef *huart);
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VIRT_UART_StatusTypeDef VIRT_UART_RegisterCallback(VIRT_UART_HandleTypeDef *huart,
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VIRT_UART_CallbackIDTypeDef CallbackID,
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void (* pCallback)(VIRT_UART_HandleTypeDef *_huart));
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/* IO operation functions *****************************************************/
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VIRT_UART_StatusTypeDef VIRT_UART_Transmit(VIRT_UART_HandleTypeDef *huart, uint8_t *pData, uint16_t Size);
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#ifdef __cplusplus
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}
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#endif
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#endif /* __VIRT_UART_H */
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/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/
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