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usbd_cdc_if_template.c
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usbd_cdc_if_template.c
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/**
******************************************************************************
* @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>© 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 ([email protected])
* 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****/