Diff: usbd_cdc_if_template.c

Revision:

2:3a73d77c2cef

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/usbd_cdc_if_template.c	Thu Jun 29 20:11:00 2017 +0000
@@ -0,0 +1,313 @@
+/**
+  ******************************************************************************
+  * @file    usbd_cdc_if_template.c
+  * @author  MCD Application Team
+  * @version V2.3.0
+  * @date    04-November-2014
+  * @brief   Generic media access Layer.
+  ******************************************************************************
+  * @attention
+  *
+  * <h2><center>&copy; COPYRIGHT 2014 STMicroelectronics</center></h2>
+  *
+  * Licensed under MCD-ST Liberty SW License Agreement V2, (the "License");
+  * You may not use this file except in compliance with the License.
+  * You may obtain a copy of the License at:
+  *
+  *        http://www.st.com/software_license_agreement_liberty_v2
+  *
+  * Unless required by applicable law or agreed to in writing, software 
+  * distributed under the License is distributed on an "AS IS" BASIS, 
+  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  * See the License for the specific language governing permissions and
+  * limitations under the License.
+  *
+  ******************************************************************************
+  * @remark
+  * Fun��es TEMPLATE_Init e TEMPLATE_Receive modificadas; Fun��es VCP_read e
+  * VCP_write criadas por Kleber Lima da Silva (kleber.ufu@hotmail.com)
+  * em 26-Abril-2015
+  *
+  */
+
+/* Includes ------------------------------------------------------------------*/
+#include "usbd_cdc_if_template.h"
+
+/** @addtogroup STM32_USB_DEVICE_LIBRARY
+  * @{
+  */
+
+
+/** @defgroup USBD_CDC 
+  * @brief usbd core module
+  * @{
+  */ 
+
+/** @defgroup USBD_CDC_Private_TypesDefinitions
+  * @{
+  */ 
+static struct
+{
+    uint8_t Buffer[CDC_DATA_FS_IN_PACKET_SIZE];
+    int Position, Size;
+    char ReadDone;
+} s_RxBuffer;
+
+
+extern USBD_HandleTypeDef USBD_Device;
+/**
+  * @}
+  */ 
+
+
+/** @defgroup USBD_CDC_Private_Defines
+  * @{
+  */ 
+/**
+  * @}
+  */ 
+
+
+/** @defgroup USBD_CDC_Private_Macros
+  * @{
+  */ 
+
+/**
+  * @}
+  */ 
+
+
+/** @defgroup USBD_CDC_Private_FunctionPrototypes
+  * @{
+  */
+
+static int8_t TEMPLATE_Init     (void);
+static int8_t TEMPLATE_DeInit   (void);
+static int8_t TEMPLATE_Control  (uint8_t cmd, uint8_t* pbuf, uint16_t length);
+static int8_t TEMPLATE_Receive  (uint8_t* pbuf, uint32_t *Len);
+
+int VCP_read(void *pBuffer, int size);
+int VCP_write(const void *pBuffer, int size);
+
+USBD_CDC_ItfTypeDef USBD_CDC_Template_fops =
+{
+  TEMPLATE_Init,
+  TEMPLATE_DeInit,
+  TEMPLATE_Control,
+  TEMPLATE_Receive
+};
+
+USBD_CDC_LineCodingTypeDef linecoding =
+  {
+    115200, /* baud rate*/
+    0x00,   /* stop bits-1*/
+    0x00,   /* parity - none*/
+    0x08    /* nb. of bits 8*/
+  };
+
+/* Private functions ---------------------------------------------------------*/
+
+/**
+  * @brief  TEMPLATE_Init
+  *         Initializes the CDC media low layer
+  * @param  None
+  * @retval Result of the operation: USBD_OK if all operations are OK else USBD_FAIL
+  */
+static int8_t TEMPLATE_Init(void)
+{
+  /*
+     Add your initialization code here 
+  */  
+
+  USBD_CDC_SetRxBuffer(&USBD_Device, s_RxBuffer.Buffer);
+
+  return (USBD_OK);
+}
+
+/**
+  * @brief  TEMPLATE_DeInit
+  *         DeInitializes the CDC media low layer
+  * @param  None
+  * @retval Result of the operation: USBD_OK if all operations are OK else USBD_FAIL
+  */
+static int8_t TEMPLATE_DeInit(void)
+{
+  /*
+     Add your deinitialization code here 
+  */  
+  return (0);
+}
+
+
+/**
+  * @brief  TEMPLATE_Control
+  *         Manage the CDC class requests
+  * @param  Cmd: Command code            
+  * @param  Buf: Buffer containing command data (request parameters)
+  * @param  Len: Number of data to be sent (in bytes)
+  * @retval Result of the operation: USBD_OK if all operations are OK else USBD_FAIL
+  */
+static int8_t TEMPLATE_Control  (uint8_t cmd, uint8_t* pbuf, uint16_t length)
+{ 
+  switch (cmd)
+  {
+  case CDC_SEND_ENCAPSULATED_COMMAND:
+    /* Add your code here */
+    break;
+
+  case CDC_GET_ENCAPSULATED_RESPONSE:
+    /* Add your code here */
+    break;
+
+  case CDC_SET_COMM_FEATURE:
+    /* Add your code here */
+    break;
+
+  case CDC_GET_COMM_FEATURE:
+    /* Add your code here */
+    break;
+
+  case CDC_CLEAR_COMM_FEATURE:
+    /* Add your code here */
+    break;
+
+  case CDC_SET_LINE_CODING:
+    linecoding.bitrate    = (uint32_t)(pbuf[0] | (pbuf[1] << 8) |\
+                            (pbuf[2] << 16) | (pbuf[3] << 24));
+    linecoding.format     = pbuf[4];
+    linecoding.paritytype = pbuf[5];
+    linecoding.datatype   = pbuf[6];
+    
+    /* Add your code here */
+    break;
+
+  case CDC_GET_LINE_CODING:
+    pbuf[0] = (uint8_t)(linecoding.bitrate);
+    pbuf[1] = (uint8_t)(linecoding.bitrate >> 8);
+    pbuf[2] = (uint8_t)(linecoding.bitrate >> 16);
+    pbuf[3] = (uint8_t)(linecoding.bitrate >> 24);
+    pbuf[4] = linecoding.format;
+    pbuf[5] = linecoding.paritytype;
+    pbuf[6] = linecoding.datatype;     
+    
+    /* Add your code here */
+    break;
+
+  case CDC_SET_CONTROL_LINE_STATE:
+    /* Add your code here */
+    break;
+
+  case CDC_SEND_BREAK:
+     /* Add your code here */
+    break;    
+    
+  default:
+    break;
+  }
+
+  return (0);
+}
+
+/**
+  * @brief  TEMPLATE_Receive
+  *         Data received over USB OUT endpoint are sent over CDC interface 
+  *         through this function.
+  *           
+  *         @note
+  *         This function will issue a NAK packet on any OUT packet received on 
+  *         USB endpoint untill exiting this function. If you exit this function
+  *         before transfer is complete on CDC interface (ie. using DMA controller)
+  *         it will result in receiving more data while previous ones are still 
+  *         not sent.
+  *                 
+  * @param  Buf: Buffer of data to be received
+  * @param  Len: Number of data received (in bytes)
+  * @retval Result of the operation: USBD_OK if all operations are OK else USBD_FAIL
+  */
+static int8_t TEMPLATE_Receive (uint8_t* Buf, uint32_t *Len)
+{
+  s_RxBuffer.Position = 0;
+  s_RxBuffer.Size = *Len;
+  s_RxBuffer.ReadDone = 1;
+
+  return (0);
+}
+
+
+/**
+  * @brief Fun��o de leitura da Virtual COM Port
+  */
+int VCP_read(void *pBuffer, int size)
+{
+    if (!s_RxBuffer.ReadDone)
+        return 0;
+
+    int remaining = s_RxBuffer.Size - s_RxBuffer.Position;
+    int todo = MIN(remaining, size);
+    if (todo <= 0)
+        return 0;
+
+    memcpy(pBuffer, s_RxBuffer.Buffer + s_RxBuffer.Position, todo);
+    s_RxBuffer.Position += todo;
+    if (s_RxBuffer.Position >= s_RxBuffer.Size)
+    {
+        s_RxBuffer.ReadDone = 0;
+        USBD_CDC_ReceivePacket(&USBD_Device);
+    }
+
+    return todo;
+}
+
+
+/**
+  * @brief Fun��o de escrita na Virtual COM Port
+  */
+int VCP_write(const void *pBuffer, int size)
+{
+	uint16_t timeout = 10000;
+
+    if (size > CDC_DATA_FS_OUT_PACKET_SIZE)
+    {
+        int offset;
+        for (offset = 0; offset < size; offset++)
+        {
+            int todo = MIN(CDC_DATA_HS_OUT_PACKET_SIZE,
+                           size - offset);
+            int done = VCP_write(((char *)pBuffer) + offset, todo);
+            if (done != todo)
+                return offset + done;
+        }
+
+        return size;
+    }
+
+    USBD_CDC_HandleTypeDef *pCDC =
+            (USBD_CDC_HandleTypeDef *)USBD_Device.pClassData;
+
+    USBD_CDC_SetTxBuffer(&USBD_Device, (uint8_t *)pBuffer, size);
+    if (USBD_CDC_TransmitPacket(&USBD_Device) != USBD_OK)
+        return 0;
+
+    while(pCDC->TxState)
+    {
+    	if ((timeout--) == 0) return 0;
+    }
+
+    return size;
+}
+
+
+/**
+  * @}
+  */ 
+
+/**
+  * @}
+  */ 
+
+/**
+  * @}
+  */ 
+
+/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/
+