472 lines
13 KiB
C
Executable File
472 lines
13 KiB
C
Executable File
/**
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******************************************************************************
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* @file : usbd_cdc_if.c
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* @brief :
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******************************************************************************
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*
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* Copyright (c) 2017 STMicroelectronics International N.V.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted, provided that the following conditions are met:
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*
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* 1. Redistribution of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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* 3. Neither the name of STMicroelectronics nor the names of other
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* contributors to this software may be used to endorse or promote products
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* derived from this software without specific written permission.
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* 4. This software, including modifications and/or derivative works of this
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* software, must execute solely and exclusively on microcontroller or
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* microprocessor devices manufactured by or for STMicroelectronics.
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* 5. Redistribution and use of this software other than as permitted under
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* this license is void and will automatically terminate your rights under
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* this license.
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*
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* THIS SOFTWARE IS PROVIDED BY STMICROELECTRONICS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS, IMPLIED OR STATUTORY WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A
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* PARTICULAR PURPOSE AND NON-INFRINGEMENT OF THIRD PARTY INTELLECTUAL PROPERTY
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* RIGHTS ARE DISCLAIMED TO THE FULLEST EXTENT PERMITTED BY LAW. IN NO EVENT
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* SHALL STMICROELECTRONICS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA,
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* OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
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* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
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* EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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******************************************************************************
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*/
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/* Includes ------------------------------------------------------------------*/
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#include "usbd_cdc_if.h"
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#include "cat_driver.h"
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#include "usb_device.h"
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#include "usbd_composite.h"
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#include "usbd_composite_desc.h"
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/* USER CODE BEGIN INCLUDE */
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/* USER CODE END INCLUDE */
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/** @addtogroup STM32_USB_OTG_DEVICE_LIBRARY
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* @{
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*/
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/** @defgroup USBD_CDC
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* @brief usbd core module
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* @{
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*/
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/** @defgroup USBD_CDC_Private_TypesDefinitions
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* @{
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*/
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/* USER CODE BEGIN PRIVATE_TYPES */
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/* USER CODE END PRIVATE_TYPES */
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/**
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* @}
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*/
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/** @defgroup USBD_CDC_Private_Defines
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* @{
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*/
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/* USER CODE BEGIN PRIVATE_DEFINES */
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/* Define size for the receive and transmit buffer over CDC */
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/* It's up to user to redefine and/or remove those define */
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#define APP_RX_DATA_SIZE 64
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#define APP_TX_DATA_SIZE 2048
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/* USER CODE END PRIVATE_DEFINES */
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/**
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* @}
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*/
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/** @defgroup USBD_CDC_Private_Macros
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* @{
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*/
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/* USER CODE BEGIN PRIVATE_MACRO */
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/* USER CODE END PRIVATE_MACRO */
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/**
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* @}
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*/
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/** @defgroup USBD_CDC_Private_Variables
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* @{
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*/
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/* Create buffer for reception and transmission */
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/* It's up to user to redefine and/or remove those define */
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/* Received Data over USB are stored in this buffer */
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uint8_t UserRxBufferFS[APP_RX_DATA_SIZE];
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/* Send Data over USB CDC are stored in this buffer */
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uint8_t UserTxBufferFS [APP_TX_DATA_SIZE];
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uint32_t CDC_Tx_PtrIn = 0;
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uint32_t CDC_Tx_PtrOut = 0;
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uint32_t CDC_Tx_Length = 0;
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uint8_t CDC_Tx_State = 0;
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typedef struct
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{
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uint32_t speed;
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uint8_t stop;
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uint8_t parity;
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uint8_t bits;
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} CdvVcp_LineCoding_t;
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static CdvVcp_LineCoding_t CDC_Linecoding =
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{
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// 9600 8n1
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.speed = 9600,
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.stop = 0, // 1 stop bit
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.bits = 8, // 8 data bits
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.parity = 0, // parity none
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};
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/* USER CODE BEGIN PRIVATE_VARIABLES */
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/* USER CODE END PRIVATE_VARIABLES */
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/**
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* @}
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*/
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/** @defgroup USBD_CDC_IF_Exported_Variables
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* @{
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*/
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__IO CdcVcp_CtrlLines_t cdcvcp_ctrllines;
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/* USER CODE BEGIN EXPORTED_VARIABLES */
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/* USER CODE END EXPORTED_VARIABLES */
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/**
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* @}
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*/
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/** @defgroup USBD_CDC_Private_FunctionPrototypes
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* @{
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*/
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static int8_t CDC_Init_FS (void);
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static int8_t CDC_DeInit_FS (void);
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static int8_t CDC_Control_FS (uint8_t cmd, uint8_t* pbuf, uint16_t length);
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static int8_t CDC_Receive_FS (uint8_t* pbuf, uint32_t *Len);
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static int8_t CDC_SOF (USBD_HandleTypeDef *pdev);
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static int8_t CDC_DataIn (USBD_HandleTypeDef *pdev);
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/* USER CODE BEGIN PRIVATE_FUNCTIONS_DECLARATION */
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/* USER CODE END PRIVATE_FUNCTIONS_DECLARATION */
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/**
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* @}
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*/
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USBD_CDC_ItfTypeDef USBD_Interface_fops_FS =
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{
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CDC_Init_FS,
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CDC_DeInit_FS,
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CDC_Control_FS,
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CDC_Receive_FS,
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CDC_SOF,
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CDC_DataIn
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};
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/* Private functions ---------------------------------------------------------*/
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/**
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* @brief CDC_Init_FS
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* Initializes the CDC media low layer over the FS USB IP
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* @param None
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* @retval Result of the operation: USBD_OK if all operations are OK else USBD_FAIL
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*/
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static int8_t CDC_Init_FS(void)
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{
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/* USER CODE BEGIN 3 */
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/* Set Application Buffers */
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USBD_CDC_SetTxBuffer(&hUsbDeviceFS, UserTxBufferFS, 0);
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USBD_CDC_SetRxBuffer(&hUsbDeviceFS, UserRxBufferFS);
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return (USBD_OK);
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/* USER CODE END 3 */
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}
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/**
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* @brief CDC_DeInit_FS
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* DeInitializes the CDC media low layer
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* @param None
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* @retval Result of the operation: USBD_OK if all operations are OK else USBD_FAIL
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*/
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static int8_t CDC_DeInit_FS(void)
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{
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/* USER CODE BEGIN 4 */
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return (USBD_OK);
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/* USER CODE END 4 */
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}
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/**
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* @brief CDC_Control_FS
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* Manage the CDC class requests
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* @param cmd: Command code
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* @param pbuf: Buffer containing command data (request parameters)
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* @param length: Number of data to be sent (in bytes)
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* @retval Result of the operation: USBD_OK if all operations are OK else USBD_FAIL
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*/
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static int8_t CDC_Control_FS (uint8_t cmd, uint8_t* pbuf, uint16_t length)
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{
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/* USER CODE BEGIN 5 */
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switch (cmd)
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{
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case CDC_SEND_ENCAPSULATED_COMMAND:
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break;
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case CDC_GET_ENCAPSULATED_RESPONSE:
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break;
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case CDC_SET_COMM_FEATURE:
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break;
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case CDC_GET_COMM_FEATURE:
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break;
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case CDC_CLEAR_COMM_FEATURE:
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break;
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/*******************************************************************************/
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/* Line Coding Structure */
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/*-----------------------------------------------------------------------------*/
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/* Offset | Field | Size | Value | Description */
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/* 0 | dwDTERate | 4 | Number |Data terminal rate, in bits per second*/
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/* 4 | bCharFormat | 1 | Number | Stop bits */
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/* 0 - 1 Stop bit */
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/* 1 - 1.5 Stop bits */
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/* 2 - 2 Stop bits */
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/* 5 | bParityType | 1 | Number | Parity */
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/* 0 - None */
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/* 1 - Odd */
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/* 2 - Even */
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/* 3 - Mark */
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/* 4 - Space */
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/* 6 | bDataBits | 1 | Number Data bits (5, 6, 7, 8 or 16). */
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/*******************************************************************************/
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case CDC_SET_LINE_CODING:
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// just copy the requested line coding
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// we ignore it for now but keep it to
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// satisfy the host when it asks for the current
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// line coding
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memcpy(&CDC_Linecoding,pbuf,sizeof(CDC_Linecoding));
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break;
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case CDC_GET_LINE_CODING:
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memcpy(pbuf,&CDC_Linecoding,length);
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break;
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case CDC_SET_CONTROL_LINE_STATE:
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{
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// we get wValue here as buffer
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uint16_t wValue = *(uint16_t*)&(pbuf[0]);
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cdcvcp_ctrllines.dtr = (wValue & 0x01)?1:0;
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cdcvcp_ctrllines.rts = (wValue & 0x02)?1:0;
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break;
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}
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break;
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case CDC_SEND_BREAK:
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break;
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default:
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break;
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}
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return (USBD_OK);
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/* USER CODE END 5 */
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}
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/**
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* @brief CDC_Receive_FS
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* Data received over USB OUT endpoint are sent over CDC interface
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* through this function.
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*
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* @note
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* This function will block any OUT packet reception on USB endpoint
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* untill exiting this function. If you exit this function before transfer
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* is complete on CDC interface (ie. using DMA controller) it will result
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* in receiving more data while previous ones are still not sent.
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*
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* @param Buf: Buffer of data to be received
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* @param Len: Number of data received (in bytes)
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* @retval Result of the operation: USBD_OK if all operations are OK else USBD_FAIL
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*/
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static int8_t CDC_Receive_FS (uint8_t* Buf, uint32_t *Len)
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{
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/* USER CODE BEGIN 6 */
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for (uint32_t i = 0; i < *Len; i++)
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{
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CatDriver_InterfaceBufferAddData(Buf[i]);
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}
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USBD_CDC_SetRxBuffer(&hUsbDeviceFS, &Buf[0]);
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USBD_CDC_ReceivePacket(&hUsbDeviceFS);
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return (USBD_OK);
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/* USER CODE END 6 */
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}
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/**
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* @brief CDC_Transmit_FS
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* Data send over USB IN endpoint are sent over CDC interface
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* through this function.
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* @note
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*
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*
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* @param Buf: Buffer of data to be send
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* @param Len: Number of data to be send (in bytes)
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* @retval Result of the operation: USBD_OK if all operations are OK else USBD_FAIL or USBD_BUSY
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*/
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uint8_t CDC_Transmit_FS(uint8_t* Buf, uint16_t Len)
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{
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uint8_t result = USBD_OK;
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/* USER CODE BEGIN 7 */
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uint32_t tx_counter = 0;
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while (tx_counter < Len)
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{
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UserTxBufferFS[CDC_Tx_PtrIn] = *(Buf+tx_counter);
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CDC_Tx_PtrIn++;
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/* To avoid buffer overflow */
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if (CDC_Tx_PtrIn >= APP_TX_DATA_SIZE)
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{
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CDC_Tx_PtrIn = 0;
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}
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tx_counter++;
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}
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/* USER CODE END 7 */
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return result;
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}
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/* USER CODE BEGIN PRIVATE_FUNCTIONS_IMPLEMENTATION */
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/* USER CODE END PRIVATE_FUNCTIONS_IMPLEMENTATION */
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/**
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* @}
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*/
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/**
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* @}
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*/
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/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/
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static void CDC_InitiateTransmit(USBD_HandleTypeDef *pdev)
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{
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uint16_t USB_Tx_ptr;
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uint16_t USB_Tx_length;
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if (CDC_Tx_Length > CDC_DATA_FS_IN_PACKET_SIZE)
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{
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USB_Tx_ptr = CDC_Tx_PtrOut;
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USB_Tx_length = CDC_DATA_FS_IN_PACKET_SIZE;
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CDC_Tx_PtrOut += CDC_DATA_FS_IN_PACKET_SIZE;
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CDC_Tx_Length -= CDC_DATA_FS_IN_PACKET_SIZE;
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}
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else
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{
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USB_Tx_ptr = CDC_Tx_PtrOut;
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USB_Tx_length = CDC_Tx_Length;
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CDC_Tx_PtrOut += CDC_Tx_Length;
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CDC_Tx_Length = 0;
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}
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CDC_Tx_State = 1;
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USBD_CDC_SetTxBuffer(pdev,
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&UserTxBufferFS[USB_Tx_ptr],
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USB_Tx_length);
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/* Prepare the available data buffer to be sent on IN endpoint */
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USBD_CDC_TransmitPacket(pdev);
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}
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/**
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* @brief Handle_USBAsynchXfer
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* Send data to USB
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* @param pdev: instance
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* @retval None
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*/
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static void CDC_Handle_USBAsynchXfer (USBD_HandleTypeDef *pdev)
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{
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if(CDC_Tx_State != 1)
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{
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if (CDC_Tx_PtrOut == APP_TX_DATA_SIZE)
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{
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CDC_Tx_PtrOut = 0;
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}
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if(CDC_Tx_PtrOut == CDC_Tx_PtrIn)
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{
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CDC_Tx_Length = 0;
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CDC_Tx_State = 0;
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}
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else
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{
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if(CDC_Tx_PtrOut > CDC_Tx_PtrIn) /* rollback */
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{
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CDC_Tx_Length = APP_TX_DATA_SIZE - CDC_Tx_PtrOut;
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}
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else
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{
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CDC_Tx_Length = CDC_Tx_PtrIn - CDC_Tx_PtrOut;
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}
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CDC_InitiateTransmit(pdev);
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}
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}
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}
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static int8_t CDC_DataIn (USBD_HandleTypeDef *pdev)
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{
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if (CDC_Tx_State == 1)
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{
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if (CDC_Tx_Length == 0)
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{
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CDC_Tx_State = 0;
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}
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else
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{
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CDC_InitiateTransmit(pdev);
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}
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}
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return CDC_Tx_State;
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}
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static int8_t CDC_SOF (USBD_HandleTypeDef *pdev)
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{
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static uint32_t FrameCount = 0;
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if (FrameCount++ == 2) // every second frame
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{
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/* Reset the frame counter */
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FrameCount = 0;
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/* Check the data to be sent through IN pipe */
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CDC_Handle_USBAsynchXfer(pdev);
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}
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return USBD_OK;
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}
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