462 lines
13 KiB
C
462 lines
13 KiB
C
/**
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******************************************************************************
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* @file USB_Device/CDC_Standalone/Src/usbd_cdc_interface.c
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* @author MCD Application Team
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* @version V1.0.1
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* @date 26-February-2014
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* @brief Source file for USBD CDC interface
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******************************************************************************
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* @attention
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*
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* <h2><center>© COPYRIGHT(c) 2014 STMicroelectronics</center></h2>
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*
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* Licensed under MCD-ST Liberty SW License Agreement V2, (the "License");
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* You may not use this file except in compliance with the License.
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* You may obtain a copy of the License at:
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*
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* http://www.st.com/software_license_agreement_liberty_v2
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*
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******************************************************************************
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*/
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/* Includes ------------------------------------------------------------------*/
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#include "stm32f4xx_hal.h"
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#include "usbd_cdc_interface.h"
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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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/* Private typedef -----------------------------------------------------------*/
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/* Private define ------------------------------------------------------------*/
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#define APP_RX_DATA_SIZE 2048
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#define APP_TX_DATA_SIZE 2048
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/* Private macro -------------------------------------------------------------*/
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/* Private variables ---------------------------------------------------------*/
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USBD_CDC_LineCodingTypeDef LineCoding =
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{
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115200, /* baud rate*/
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0x00, /* stop bits-1*/
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0x00, /* parity - none*/
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0x08 /* nb. of bits 8*/
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};
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uint8_t UserRxBuffer[APP_RX_DATA_SIZE];/* Received Data over USB are stored in this buffer */
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uint8_t UserTxBuffer[APP_TX_DATA_SIZE];/* Received Data over UART (CDC interface) are stored in this buffer */
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uint32_t BuffLength;
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uint32_t UserTxBufPtrIn = 0;/* Increment this pointer or roll it back to
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start address when data are received over USART */
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uint32_t UserTxBufPtrOut = 0; /* Increment this pointer or roll it back to
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start address when data are sent over USB */
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/* UART handler declaration */
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UART_HandleTypeDef UartHandle;
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/* TIM handler declaration */
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TIM_HandleTypeDef TimHandle;
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/* USB handler declaration */
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extern USBD_HandleTypeDef hUSBDDevice;
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/* Private function prototypes -----------------------------------------------*/
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static int8_t CDC_Itf_Init (void);
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static int8_t CDC_Itf_DeInit (void);
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static int8_t CDC_Itf_Control (uint8_t cmd, uint8_t* pbuf, uint16_t length);
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static int8_t CDC_Itf_Receive (uint8_t* pbuf, uint32_t *Len);
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static void Error_Handler(void);
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static void ComPort_Config(void);
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//static void TIM_Config(void);
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USBD_CDC_ItfTypeDef USBD_CDC_fops =
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{
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CDC_Itf_Init,
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CDC_Itf_DeInit,
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CDC_Itf_Control,
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CDC_Itf_Receive
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};
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/* Private functions ---------------------------------------------------------*/
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/**
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* @brief CDC_Itf_Init
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* Initializes the CDC media low layer
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* @param None
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* @retval Result of the opeartion: USBD_OK if all operations are OK else USBD_FAIL
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*/
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static int8_t CDC_Itf_Init(void)
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{
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#if 0
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/*##-1- Configure the UART peripheral ######################################*/
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/* Put the USART peripheral in the Asynchronous mode (UART Mode) */
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/* USART configured as follow:
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- Word Length = 8 Bits
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- Stop Bit = One Stop bit
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- Parity = No parity
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- BaudRate = 115200 baud
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- Hardware flow control disabled (RTS and CTS signals) */
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UartHandle.Instance = USARTx;
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UartHandle.Init.BaudRate = 115200;
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UartHandle.Init.WordLength = UART_WORDLENGTH_8B;
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UartHandle.Init.StopBits = UART_STOPBITS_1;
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UartHandle.Init.Parity = UART_PARITY_NONE;
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UartHandle.Init.HwFlowCtl = UART_HWCONTROL_NONE;
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UartHandle.Init.Mode = UART_MODE_TX_RX;
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if(HAL_UART_Init(&UartHandle) != HAL_OK)
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{
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/* Initialization Error */
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Error_Handler();
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}
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/*##-2- Put UART peripheral in IT reception process ########################*/
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/* Any data received will be stored in "UserTxBuffer" buffer */
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if(HAL_UART_Receive_IT(&UartHandle, (uint8_t *)UserTxBuffer, 1) != HAL_OK)
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{
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/* Transfer error in reception process */
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Error_Handler();
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}
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/*##-3- Configure the TIM Base generation #################################*/
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TIM_Config();
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/*##-4- Start the TIM Base generation in interrupt mode ####################*/
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/* Start Channel1 */
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if(HAL_TIM_Base_Start_IT(&TimHandle) != HAL_OK)
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{
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/* Starting Error */
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Error_Handler();
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}
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#endif
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/*##-5- Set Application Buffers ############################################*/
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USBD_CDC_SetTxBuffer(&hUSBDDevice, UserTxBuffer, 0);
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USBD_CDC_SetRxBuffer(&hUSBDDevice, UserRxBuffer);
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return (USBD_OK);
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}
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/**
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* @brief CDC_Itf_DeInit
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* DeInitializes the CDC media low layer
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* @param None
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* @retval Result of the opeartion: USBD_OK if all operations are OK else USBD_FAIL
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*/
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static int8_t CDC_Itf_DeInit(void)
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{
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#if 0
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/* DeInitialize the UART peripheral */
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if(HAL_UART_DeInit(&UartHandle) != HAL_OK)
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{
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/* Initialization Error */
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Error_Handler();
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}
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#endif
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return (USBD_OK);
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}
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/**
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* @brief CDC_Itf_Control
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* Manage the CDC class requests
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* @param Cmd: Command code
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* @param Buf: Buffer containing command data (request parameters)
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* @param Len: Number of data to be sent (in bytes)
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* @retval Result of the opeartion: USBD_OK if all operations are OK else USBD_FAIL
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*/
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static int8_t CDC_Itf_Control (uint8_t cmd, uint8_t* pbuf, uint16_t length)
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{
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switch (cmd)
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{
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case CDC_SEND_ENCAPSULATED_COMMAND:
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/* Add your code here */
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break;
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case CDC_GET_ENCAPSULATED_RESPONSE:
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/* Add your code here */
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break;
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case CDC_SET_COMM_FEATURE:
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/* Add your code here */
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break;
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case CDC_GET_COMM_FEATURE:
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/* Add your code here */
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break;
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case CDC_CLEAR_COMM_FEATURE:
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/* Add your code here */
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break;
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case CDC_SET_LINE_CODING:
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LineCoding.bitrate = (uint32_t)(pbuf[0] | (pbuf[1] << 8) |\
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(pbuf[2] << 16) | (pbuf[3] << 24));
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LineCoding.format = pbuf[4];
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LineCoding.paritytype = pbuf[5];
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LineCoding.datatype = pbuf[6];
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/* Set the new configuration */
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ComPort_Config();
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break;
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case CDC_GET_LINE_CODING:
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pbuf[0] = (uint8_t)(LineCoding.bitrate);
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pbuf[1] = (uint8_t)(LineCoding.bitrate >> 8);
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pbuf[2] = (uint8_t)(LineCoding.bitrate >> 16);
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pbuf[3] = (uint8_t)(LineCoding.bitrate >> 24);
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pbuf[4] = LineCoding.format;
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pbuf[5] = LineCoding.paritytype;
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pbuf[6] = LineCoding.datatype;
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/* Add your code here */
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break;
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case CDC_SET_CONTROL_LINE_STATE:
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/* Add your code here */
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break;
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case CDC_SEND_BREAK:
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/* Add your code here */
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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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}
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/**
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* @brief TIM period elapsed callback
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* @param htim: TIM handle
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* @retval None
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*/
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void HAL_TIM_PeriodElapsedCallback(TIM_HandleTypeDef *htim)
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{
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uint32_t buffptr;
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uint32_t buffsize;
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if(UserTxBufPtrOut != UserTxBufPtrIn)
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{
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if(UserTxBufPtrOut > UserTxBufPtrIn) /* rollback */
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{
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buffsize = APP_RX_DATA_SIZE - UserTxBufPtrOut;
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}
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else
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{
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buffsize = UserTxBufPtrIn - UserTxBufPtrOut;
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}
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buffptr = UserTxBufPtrOut;
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USBD_CDC_SetTxBuffer(&hUSBDDevice, (uint8_t*)&UserTxBuffer[buffptr], buffsize);
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if(USBD_CDC_TransmitPacket(&hUSBDDevice) == USBD_OK)
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{
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UserTxBufPtrOut += buffsize;
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if (UserTxBufPtrOut == APP_RX_DATA_SIZE)
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{
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UserTxBufPtrOut = 0;
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}
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}
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}
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}
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/**
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* @brief Rx Transfer completed callback
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* @param huart: UART handle
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* @retval None
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*/
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void HAL_UART_RxCpltCallback(UART_HandleTypeDef *huart)
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{
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/* Increment Index for buffer writing */
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UserTxBufPtrIn++;
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/* To avoid buffer overflow */
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if(UserTxBufPtrIn == APP_RX_DATA_SIZE)
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{
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UserTxBufPtrIn = 0;
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}
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/* Start another reception: provide the buffer pointer with offset and the buffer size */
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HAL_UART_Receive_IT(huart, (uint8_t *)(UserTxBuffer + UserTxBufPtrIn), 1);
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}
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/**
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* @brief CDC_Itf_DataRx
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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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* @param Buf: Buffer of data to be transmitted
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* @param Len: Number of data received (in bytes)
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* @retval Result of the opeartion: USBD_OK if all operations are OK else USBD_FAIL
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*/
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static int8_t CDC_Itf_Receive(uint8_t* Buf, uint32_t *Len)
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{
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HAL_UART_Transmit_DMA(&UartHandle, Buf, *Len);
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return (USBD_OK);
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}
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/**
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* @brief Tx Transfer completed callback
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* @param huart: UART handle
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* @retval None
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*/
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void HAL_UART_TxCpltCallback(UART_HandleTypeDef *huart)
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{
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/* Initiate next USB packet transfer once UART completes transfer (transmitting data over Tx line) */
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USBD_CDC_ReceivePacket(&hUSBDDevice);
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}
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/**
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* @brief ComPort_Config
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* Configure the COM Port with the parameters received from host.
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* @param None.
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* @retval None.
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* @note When a configuration is not supported, a default value is used.
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*/
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static void ComPort_Config(void)
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{
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if(HAL_UART_DeInit(&UartHandle) != HAL_OK)
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{
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/* Initialization Error */
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Error_Handler();
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}
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/* set the Stop bit */
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switch (LineCoding.format)
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{
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case 0:
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UartHandle.Init.StopBits = UART_STOPBITS_1;
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break;
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case 2:
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UartHandle.Init.StopBits = UART_STOPBITS_2;
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break;
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default :
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UartHandle.Init.StopBits = UART_STOPBITS_1;
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break;
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}
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/* set the parity bit*/
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switch (LineCoding.paritytype)
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{
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case 0:
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UartHandle.Init.Parity = UART_PARITY_NONE;
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break;
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case 1:
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UartHandle.Init.Parity = UART_PARITY_ODD;
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break;
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case 2:
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UartHandle.Init.Parity = UART_PARITY_EVEN;
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break;
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default :
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UartHandle.Init.Parity = UART_PARITY_NONE;
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break;
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}
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/*set the data type : only 8bits and 9bits is supported */
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switch (LineCoding.datatype)
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{
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case 0x07:
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/* With this configuration a parity (Even or Odd) must be set */
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UartHandle.Init.WordLength = UART_WORDLENGTH_8B;
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break;
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case 0x08:
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if(UartHandle.Init.Parity == UART_PARITY_NONE)
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{
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UartHandle.Init.WordLength = UART_WORDLENGTH_8B;
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}
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else
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{
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UartHandle.Init.WordLength = UART_WORDLENGTH_9B;
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}
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break;
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default :
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UartHandle.Init.WordLength = UART_WORDLENGTH_8B;
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break;
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}
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UartHandle.Init.BaudRate = LineCoding.bitrate;
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UartHandle.Init.HwFlowCtl = UART_HWCONTROL_NONE;
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UartHandle.Init.Mode = UART_MODE_TX_RX;
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if(HAL_UART_Init(&UartHandle) != HAL_OK)
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{
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/* Initialization Error */
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Error_Handler();
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}
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/* Start reception: provide the buffer pointer with offset and the buffer size */
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HAL_UART_Receive_IT(&UartHandle, (uint8_t *)(UserTxBuffer + UserTxBufPtrIn), 1);
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}
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/**
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* @brief TIM_Config: Configure TIMx timer
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* @param None.
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* @retval None.
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*/
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#if 0
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static void TIM_Config(void)
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{
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/* Set TIMx instance */
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TimHandle.Instance = TIMx;
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/* Initialize TIM3 peripheral as follow:
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+ Period = 10000 - 1
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+ Prescaler = ((SystemCoreClock/2)/10000) - 1
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+ ClockDivision = 0
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+ Counter direction = Up
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*/
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TimHandle.Init.Period = (CDC_POLLING_INTERVAL*1000) - 1;
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TimHandle.Init.Prescaler = 84-1;
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TimHandle.Init.ClockDivision = 0;
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TimHandle.Init.CounterMode = TIM_COUNTERMODE_UP;
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if(HAL_TIM_Base_Init(&TimHandle) != HAL_OK)
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{
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/* Initialization Error */
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Error_Handler();
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}
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}
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#endif
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/**
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* @brief UART error callbacks
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* @param UartHandle: UART handle
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* @retval None
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*/
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void HAL_UART_ErrorCallback(UART_HandleTypeDef *UartHandle)
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{
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/* Transfer error occured in reception and/or transmission process */
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Error_Handler();
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}
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/**
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* @brief This function is executed in case of error occurrence.
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* @param None
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* @retval None
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*/
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static void Error_Handler(void)
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{
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/* Add your own code here */
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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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*/
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/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/
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