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/**
******************************************************************************
* @file usbd_cdc_vcp.c
* @author MCD Application Team
* @version V1.1.0
* @date 19-March-2012
* @brief Generic media access Layer.
******************************************************************************
* @attention
*
* <h2><center>© COPYRIGHT 2012 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.
*
******************************************************************************
*/
#ifdef USB_OTG_HS_INTERNAL_DMA_ENABLED
#pragma data_alignment = 4
#endif /* USB_OTG_HS_INTERNAL_DMA_ENABLED */
/* Includes ------------------------------------------------------------------*/
#include "usbd_conf.h"
#include "usbd_cdc_vcp.h"
#include "std.h"
/* Private typedef -----------------------------------------------------------*/
/* Private define ------------------------------------------------------------*/
/* Private macro -------------------------------------------------------------*/
/* Private variables ---------------------------------------------------------*/
LINE_CODING linecoding =
{
115200, /* baud rate*/
0x00, /* stop bits-1*/
0x00, /* parity - none*/
0x08 /* nb. of bits 8*/
};
/* These are external variables imported from CDC core to be used for IN
transfer management. */
extern uint8_t APP_Rx_Buffer []; /* Write CDC received data in this buffer.
These data will be sent over USB IN endpoint
in the CDC core functions. */
extern uint32_t APP_Rx_ptr_in; /* Increment this pointer or roll it back to
start address when writing received data
in the buffer APP_Rx_Buffer. */
/* Private function prototypes -----------------------------------------------*/
static uint16_t VCP_Init (void);
static uint16_t VCP_DeInit (void);
static uint16_t VCP_Ctrl (uint32_t Cmd, uint8_t* Buf, uint32_t Len);
static uint16_t VCP_DataTx (const uint8_t* Buf, uint32_t Len);
static uint16_t VCP_DataRx (uint8_t* Buf, uint32_t Len);
CDC_IF_Prop_TypeDef VCP_fops =
{
VCP_Init,
VCP_DeInit,
VCP_Ctrl,
VCP_DataTx,
VCP_DataRx
};
/* Private functions ---------------------------------------------------------*/
/**
* @brief VCP_Init
* Initializes the Media on the STM32
* @param None
* @retval Result of the opeartion (USBD_OK in all cases)
*/
static uint16_t VCP_Init(void) {
return USBD_OK;
}
/**
* @brief VCP_DeInit
* DeInitializes the Media on the STM32
* @param None
* @retval Result of the opeartion (USBD_OK in all cases)
*/
static uint16_t VCP_DeInit(void)
{
return USBD_OK;
}
/**
* @brief VCP_Ctrl
* 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 opeartion (USBD_OK in all cases)
*/
static uint16_t VCP_Ctrl (uint32_t Cmd, uint8_t* Buf, uint32_t Len)
{
switch (Cmd)
{
case SEND_ENCAPSULATED_COMMAND:
/* Not needed for this driver */
break;
case GET_ENCAPSULATED_RESPONSE:
/* Not needed for this driver */
break;
case SET_COMM_FEATURE:
/* Not needed for this driver */
break;
case GET_COMM_FEATURE:
/* Not needed for this driver */
break;
case CLEAR_COMM_FEATURE:
/* Not needed for this driver */
break;
case SET_LINE_CODING:
/*
linecoding.bitrate = (uint32_t)(Buf[0] | (Buf[1] << 8) | (Buf[2] << 16) | (Buf[3] << 24));
linecoding.format = Buf[4];
linecoding.paritytype = Buf[5];
linecoding.datatype = Buf[6];
// Set the new configuration
VCP_COMConfig(OTHER_CONFIG);
*/
break;
case GET_LINE_CODING:
/*
Buf[0] = (uint8_t)(linecoding.bitrate);
Buf[1] = (uint8_t)(linecoding.bitrate >> 8);
Buf[2] = (uint8_t)(linecoding.bitrate >> 16);
Buf[3] = (uint8_t)(linecoding.bitrate >> 24);
Buf[4] = linecoding.format;
Buf[5] = linecoding.paritytype;
Buf[6] = linecoding.datatype;
*/
Buf[0] = 0;
Buf[1] = 0;
Buf[2] = 0;
Buf[3] = 0;
Buf[4] = 0;
Buf[5] = 0;
Buf[6] = 0;
break;
case SET_CONTROL_LINE_STATE:
/* Not needed for this driver */
break;
case SEND_BREAK:
/* Not needed for this driver */
break;
default:
break;
}
return USBD_OK;
}
/**
* @brief VCP_DataTx
* CDC received data to be send over USB IN endpoint are managed in
* this function.
* @param Buf: Buffer of data to be sent
* @param Len: Number of data to be sent (in bytes)
* @retval Result of the opeartion: USBD_OK if all operations are OK else VCP_FAIL
*/
static uint16_t VCP_DataTx (const uint8_t* Buf, uint32_t Len)
{
for (int i = 0; i < Len; i++) {
APP_Rx_Buffer[APP_Rx_ptr_in] = Buf[i];
APP_Rx_ptr_in++;
/* To avoid buffer overflow */
if(APP_Rx_ptr_in == APP_RX_DATA_SIZE) {
APP_Rx_ptr_in = 0;
}
}
return USBD_OK;
}
/**
* @brief VCP_DataRx
* Data received over USB OUT endpoint are sent over CDC interface
* through this function.
*
* @note
* This function will block any OUT packet reception 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 opeartion: USBD_OK if all operations are OK else VCP_FAIL
*/
static uint16_t VCP_DataRx (uint8_t* Buf, uint32_t Len) {
extern void usb_vcp_receive(uint8_t *buf, uint32_t len);
usb_vcp_receive(Buf, Len);
return USBD_OK;
}
/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/
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