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| Rev | Author | Line No. | Line |
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| 16 | mjames | 1 | /* USER CODE BEGIN Header */ |
| 2 | /** |
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| 3 | ****************************************************************************** |
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| 4 | * @file : usbd_cdc_if.c |
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| 5 | * @version : v2.0_Cube |
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| 6 | * @brief : Usb device for Virtual Com Port. |
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| 7 | ****************************************************************************** |
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| 8 | * @attention |
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| 9 | * |
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| 10 | * <h2><center>© Copyright (c) 2021 STMicroelectronics. |
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| 11 | * All rights reserved.</center></h2> |
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| 12 | * |
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| 13 | * This software component is licensed by ST under Ultimate Liberty license |
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| 14 | * SLA0044, the "License"; You may not use this file except in compliance with |
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| 15 | * the License. You may obtain a copy of the License at: |
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| 16 | * www.st.com/SLA0044 |
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| 17 | * |
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| 18 | ****************************************************************************** |
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| 19 | */ |
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| 20 | /* USER CODE END Header */ |
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| 21 | |||
| 22 | /* Includes ------------------------------------------------------------------*/ |
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| 23 | #include "usbd_cdc_if.h" |
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| 24 | |||
| 25 | /* USER CODE BEGIN INCLUDE */ |
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| 26 | |||
| 27 | /* USER CODE END INCLUDE */ |
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| 28 | |||
| 29 | /* Private typedef -----------------------------------------------------------*/ |
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| 30 | /* Private define ------------------------------------------------------------*/ |
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| 31 | /* Private macro -------------------------------------------------------------*/ |
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| 32 | |||
| 33 | /* USER CODE BEGIN PV */ |
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| 34 | /* Private variables ---------------------------------------------------------*/ |
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| 35 | |||
| 36 | /* USER CODE END PV */ |
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| 37 | |||
| 38 | /** @addtogroup STM32_USB_OTG_DEVICE_LIBRARY |
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| 39 | * @brief Usb device library. |
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| 40 | * @{ |
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| 41 | */ |
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| 42 | |||
| 43 | /** @addtogroup USBD_CDC_IF |
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| 44 | * @{ |
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| 45 | */ |
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| 46 | |||
| 47 | /** @defgroup USBD_CDC_IF_Private_TypesDefinitions USBD_CDC_IF_Private_TypesDefinitions |
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| 48 | * @brief Private types. |
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| 49 | * @{ |
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| 50 | */ |
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| 51 | |||
| 52 | /* USER CODE BEGIN PRIVATE_TYPES */ |
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| 53 | |||
| 54 | /* USER CODE END PRIVATE_TYPES */ |
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| 55 | |||
| 56 | /** |
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| 57 | * @} |
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| 58 | */ |
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| 59 | |||
| 60 | /** @defgroup USBD_CDC_IF_Private_Defines USBD_CDC_IF_Private_Defines |
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| 61 | * @brief Private defines. |
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| 62 | * @{ |
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| 63 | */ |
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| 64 | |||
| 65 | /* USER CODE BEGIN PRIVATE_DEFINES */ |
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| 66 | /* USER CODE END PRIVATE_DEFINES */ |
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| 67 | |||
| 68 | /** |
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| 69 | * @} |
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| 70 | */ |
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| 71 | |||
| 72 | /** @defgroup USBD_CDC_IF_Private_Macros USBD_CDC_IF_Private_Macros |
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| 73 | * @brief Private macros. |
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| 74 | * @{ |
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| 75 | */ |
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| 76 | |||
| 77 | /* USER CODE BEGIN PRIVATE_MACRO */ |
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| 78 | |||
| 79 | /* USER CODE END PRIVATE_MACRO */ |
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| 80 | |||
| 81 | /** |
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| 82 | * @} |
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| 83 | */ |
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| 84 | |||
| 85 | /** @defgroup USBD_CDC_IF_Private_Variables USBD_CDC_IF_Private_Variables |
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| 86 | * @brief Private variables. |
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| 87 | * @{ |
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| 88 | */ |
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| 89 | /* Create buffer for reception and transmission */ |
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| 90 | /* It's up to user to redefine and/or remove those define */ |
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| 91 | /** Received data over USB are stored in this buffer */ |
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| 92 | uint8_t UserRxBufferFS[APP_RX_DATA_SIZE]; |
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| 93 | |||
| 94 | /** Data to send over USB CDC are stored in this buffer */ |
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| 95 | uint8_t UserTxBufferFS[APP_TX_DATA_SIZE]; |
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| 96 | |||
| 97 | /* USER CODE BEGIN PRIVATE_VARIABLES */ |
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| 98 | |||
| 99 | /* USER CODE END PRIVATE_VARIABLES */ |
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| 100 | |||
| 101 | /** |
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| 102 | * @} |
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| 103 | */ |
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| 104 | |||
| 105 | /** @defgroup USBD_CDC_IF_Exported_Variables USBD_CDC_IF_Exported_Variables |
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| 106 | * @brief Public variables. |
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| 107 | * @{ |
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| 108 | */ |
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| 109 | |||
| 110 | extern USBD_HandleTypeDef hUsbDeviceFS; |
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| 111 | |||
| 112 | /* USER CODE BEGIN EXPORTED_VARIABLES */ |
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| 113 | |||
| 114 | /* USER CODE END EXPORTED_VARIABLES */ |
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| 115 | |||
| 116 | /** |
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| 117 | * @} |
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| 118 | */ |
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| 119 | |||
| 120 | /** @defgroup USBD_CDC_IF_Private_FunctionPrototypes USBD_CDC_IF_Private_FunctionPrototypes |
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| 121 | * @brief Private functions declaration. |
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| 122 | * @{ |
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| 123 | */ |
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| 124 | |||
| 125 | static int8_t CDC_Init_FS(void); |
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| 126 | static int8_t CDC_DeInit_FS(void); |
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| 127 | static int8_t CDC_Control_FS(uint8_t cmd, uint8_t* pbuf, uint16_t length); |
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| 128 | static int8_t CDC_Receive_FS(uint8_t* pbuf, uint32_t *Len); |
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| 129 | |||
| 130 | /* USER CODE BEGIN PRIVATE_FUNCTIONS_DECLARATION */ |
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| 131 | |||
| 132 | /* USER CODE END PRIVATE_FUNCTIONS_DECLARATION */ |
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| 133 | |||
| 134 | /** |
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| 135 | * @} |
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| 136 | */ |
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| 137 | |||
| 138 | USBD_CDC_ItfTypeDef USBD_Interface_fops_FS = |
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| 139 | { |
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| 140 | CDC_Init_FS, |
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| 141 | CDC_DeInit_FS, |
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| 142 | CDC_Control_FS, |
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| 143 | CDC_Receive_FS |
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| 144 | }; |
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| 145 | |||
| 146 | /* Private functions ---------------------------------------------------------*/ |
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| 147 | /** |
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| 148 | * @brief Initializes the CDC media low layer over the FS USB IP |
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| 149 | * @retval USBD_OK if all operations are OK else USBD_FAIL |
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| 150 | */ |
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| 151 | static int8_t CDC_Init_FS(void) |
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| 152 | { |
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| 153 | /* USER CODE BEGIN 3 */ |
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| 154 | /* Set Application Buffers */ |
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| 155 | USBD_CDC_SetTxBuffer(&hUsbDeviceFS, UserTxBufferFS, 0); |
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| 156 | USBD_CDC_SetRxBuffer(&hUsbDeviceFS, UserRxBufferFS); |
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| 157 | return (USBD_OK); |
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| 158 | /* USER CODE END 3 */ |
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| 159 | } |
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| 160 | |||
| 161 | /** |
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| 162 | * @brief DeInitializes the CDC media low layer |
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| 163 | * @retval USBD_OK if all operations are OK else USBD_FAIL |
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| 164 | */ |
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| 165 | static int8_t CDC_DeInit_FS(void) |
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| 166 | { |
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| 167 | /* USER CODE BEGIN 4 */ |
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| 168 | return (USBD_OK); |
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| 169 | /* USER CODE END 4 */ |
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| 170 | } |
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| 171 | |||
| 172 | /** |
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| 173 | * @brief Manage the CDC class requests |
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| 174 | * @param cmd: Command code |
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| 175 | * @param pbuf: Buffer containing command data (request parameters) |
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| 176 | * @param length: Number of data to be sent (in bytes) |
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| 177 | * @retval Result of the operation: USBD_OK if all operations are OK else USBD_FAIL |
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| 178 | */ |
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| 179 | static int8_t CDC_Control_FS(uint8_t cmd, uint8_t* pbuf, uint16_t length) |
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| 180 | { |
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| 181 | /* USER CODE BEGIN 5 */ |
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| 182 | switch(cmd) |
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| 183 | { |
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| 184 | case CDC_SEND_ENCAPSULATED_COMMAND: |
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| 185 | |||
| 186 | break; |
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| 187 | |||
| 188 | case CDC_GET_ENCAPSULATED_RESPONSE: |
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| 189 | |||
| 190 | break; |
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| 191 | |||
| 192 | case CDC_SET_COMM_FEATURE: |
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| 193 | |||
| 194 | break; |
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| 195 | |||
| 196 | case CDC_GET_COMM_FEATURE: |
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| 197 | |||
| 198 | break; |
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| 199 | |||
| 200 | case CDC_CLEAR_COMM_FEATURE: |
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| 201 | |||
| 202 | break; |
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| 203 | |||
| 204 | /*******************************************************************************/ |
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| 205 | /* Line Coding Structure */ |
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| 206 | /*-----------------------------------------------------------------------------*/ |
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| 207 | /* Offset | Field | Size | Value | Description */ |
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| 208 | /* 0 | dwDTERate | 4 | Number |Data terminal rate, in bits per second*/ |
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| 209 | /* 4 | bCharFormat | 1 | Number | Stop bits */ |
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| 210 | /* 0 - 1 Stop bit */ |
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| 211 | /* 1 - 1.5 Stop bits */ |
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| 212 | /* 2 - 2 Stop bits */ |
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| 213 | /* 5 | bParityType | 1 | Number | Parity */ |
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| 214 | /* 0 - None */ |
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| 215 | /* 1 - Odd */ |
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| 216 | /* 2 - Even */ |
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| 217 | /* 3 - Mark */ |
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| 218 | /* 4 - Space */ |
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| 219 | /* 6 | bDataBits | 1 | Number Data bits (5, 6, 7, 8 or 16). */ |
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| 220 | /*******************************************************************************/ |
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| 221 | case CDC_SET_LINE_CODING: |
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| 222 | |||
| 223 | break; |
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| 224 | |||
| 225 | case CDC_GET_LINE_CODING: |
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| 226 | |||
| 227 | break; |
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| 228 | |||
| 229 | case CDC_SET_CONTROL_LINE_STATE: |
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| 230 | |||
| 231 | break; |
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| 232 | |||
| 233 | case CDC_SEND_BREAK: |
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| 234 | |||
| 235 | break; |
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| 236 | |||
| 237 | default: |
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| 238 | break; |
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| 239 | } |
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| 240 | |||
| 241 | return (USBD_OK); |
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| 242 | /* USER CODE END 5 */ |
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| 243 | } |
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| 244 | |||
| 245 | /** |
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| 246 | * @brief Data received over USB OUT endpoint are sent over CDC interface |
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| 247 | * through this function. |
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| 248 | * |
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| 249 | * @note |
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| 250 | * This function will issue a NAK packet on any OUT packet received on |
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| 251 | * USB endpoint until exiting this function. If you exit this function |
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| 252 | * before transfer is complete on CDC interface (ie. using DMA controller) |
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| 253 | * it will result in receiving more data while previous ones are still |
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| 254 | * not sent. |
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| 255 | * |
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| 256 | * @param Buf: Buffer of data to be received |
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| 257 | * @param Len: Number of data received (in bytes) |
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| 258 | * @retval Result of the operation: USBD_OK if all operations are OK else USBD_FAIL |
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| 259 | */ |
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| 260 | static int8_t CDC_Receive_FS(uint8_t* Buf, uint32_t *Len) |
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| 261 | { |
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| 262 | /* USER CODE BEGIN 6 */ |
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| 263 | USBD_CDC_SetRxBuffer(&hUsbDeviceFS, &Buf[0]); |
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| 264 | USBD_CDC_ReceivePacket(&hUsbDeviceFS); |
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| 265 | return (USBD_OK); |
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| 266 | /* USER CODE END 6 */ |
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| 267 | } |
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| 268 | |||
| 269 | /** |
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| 270 | * @brief CDC_Transmit_FS |
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| 271 | * Data to send over USB IN endpoint are sent over CDC interface |
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| 272 | * through this function. |
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| 273 | * @note |
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| 274 | * |
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| 275 | * |
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| 276 | * @param Buf: Buffer of data to be sent |
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| 277 | * @param Len: Number of data to be sent (in bytes) |
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| 278 | * @retval USBD_OK if all operations are OK else USBD_FAIL or USBD_BUSY |
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| 279 | */ |
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| 280 | uint8_t CDC_Transmit_FS(uint8_t* Buf, uint16_t Len) |
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| 281 | { |
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| 282 | uint8_t result = USBD_OK; |
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| 283 | /* USER CODE BEGIN 7 */ |
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| 284 | USBD_CDC_HandleTypeDef *hcdc = (USBD_CDC_HandleTypeDef*)hUsbDeviceFS.pClassData; |
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| 285 | if (hcdc->TxState != 0){ |
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| 286 | return USBD_BUSY; |
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| 287 | } |
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| 288 | USBD_CDC_SetTxBuffer(&hUsbDeviceFS, Buf, Len); |
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| 289 | result = USBD_CDC_TransmitPacket(&hUsbDeviceFS); |
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| 290 | /* USER CODE END 7 */ |
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| 291 | return result; |
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| 292 | } |
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| 293 | |||
| 294 | /* USER CODE BEGIN PRIVATE_FUNCTIONS_IMPLEMENTATION */ |
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| 295 | |||
| 296 | /* USER CODE END PRIVATE_FUNCTIONS_IMPLEMENTATION */ |
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| 297 | |||
| 298 | /** |
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| 299 | * @} |
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| 300 | */ |
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| 301 | |||
| 302 | /** |
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| 303 | * @} |
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| 304 | */ |
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| 305 | |||
| 306 | /************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/ |