usbd_cdc_vcp.c
381 lines
| 11.5 KiB
| text/x-c
|
CLexer
kaveh
|
r59 | /** | ||
****************************************************************************** | ||||
* @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_cdc_vcp.h" | ||||
#include "usb_conf.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*/ | ||||
}; | ||||
USART_InitTypeDef USART_InitStructure; | ||||
/* 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 (uint8_t* Buf, uint32_t Len); | ||||
static uint16_t VCP_DataRx (uint8_t* Buf, uint32_t Len); | ||||
static uint16_t VCP_COMConfig(uint8_t Conf); | ||||
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) | ||||
{ | ||||
NVIC_InitTypeDef NVIC_InitStructure; | ||||
/* EVAL_COM1 default configuration */ | ||||
/* EVAL_COM1 configured as follow: | ||||
- BaudRate = 115200 baud | ||||
- Word Length = 8 Bits | ||||
- One Stop Bit | ||||
- Parity Odd | ||||
- Hardware flow control disabled | ||||
- Receive and transmit enabled | ||||
*/ | ||||
USART_InitStructure.USART_BaudRate = 115200; | ||||
USART_InitStructure.USART_WordLength = USART_WordLength_8b; | ||||
USART_InitStructure.USART_StopBits = USART_StopBits_1; | ||||
USART_InitStructure.USART_Parity = USART_Parity_Odd; | ||||
USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None; | ||||
USART_InitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx; | ||||
/* Configure and enable the USART */ | ||||
STM_EVAL_COMInit(COM1, &USART_InitStructure); | ||||
/* Enable the USART Receive interrupt */ | ||||
USART_ITConfig(EVAL_COM1, USART_IT_RXNE, ENABLE); | ||||
/* Enable USART Interrupt */ | ||||
NVIC_InitStructure.NVIC_IRQChannel = EVAL_COM1_IRQn; | ||||
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0; | ||||
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0; | ||||
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE; | ||||
NVIC_Init(&NVIC_InitStructure); | ||||
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; | ||||
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 (uint8_t* Buf, uint32_t Len) | ||||
{ | ||||
if (linecoding.datatype == 7) | ||||
{ | ||||
APP_Rx_Buffer[APP_Rx_ptr_in] = USART_ReceiveData(EVAL_COM1) & 0x7F; | ||||
} | ||||
else if (linecoding.datatype == 8) | ||||
{ | ||||
APP_Rx_Buffer[APP_Rx_ptr_in] = USART_ReceiveData(EVAL_COM1); | ||||
} | ||||
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) | ||||
{ | ||||
uint32_t i; | ||||
for (i = 0; i < Len; i++) | ||||
{ | ||||
USART_SendData(EVAL_COM1, *(Buf + i) ); | ||||
while(USART_GetFlagStatus(EVAL_COM1, USART_FLAG_TXE) == RESET); | ||||
} | ||||
return USBD_OK; | ||||
} | ||||
/** | ||||
* @brief VCP_COMConfig | ||||
* Configure the COM Port with default values or values received from host. | ||||
* @param Conf: can be DEFAULT_CONFIG to set the default configuration or OTHER_CONFIG | ||||
* to set a configuration received from the host. | ||||
* @retval None. | ||||
*/ | ||||
static uint16_t VCP_COMConfig(uint8_t Conf) | ||||
{ | ||||
if (Conf == DEFAULT_CONFIG) | ||||
{ | ||||
/* EVAL_COM1 default configuration */ | ||||
/* EVAL_COM1 configured as follow: | ||||
- BaudRate = 115200 baud | ||||
- Word Length = 8 Bits | ||||
- One Stop Bit | ||||
- Parity Odd | ||||
- Hardware flow control disabled | ||||
- Receive and transmit enabled | ||||
*/ | ||||
USART_InitStructure.USART_BaudRate = 115200; | ||||
USART_InitStructure.USART_WordLength = USART_WordLength_8b; | ||||
USART_InitStructure.USART_StopBits = USART_StopBits_1; | ||||
USART_InitStructure.USART_Parity = USART_Parity_Odd; | ||||
USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None; | ||||
USART_InitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx; | ||||
/* Configure and enable the USART */ | ||||
STM_EVAL_COMInit(COM1, &USART_InitStructure); | ||||
/* Enable the USART Receive interrupt */ | ||||
USART_ITConfig(EVAL_COM1, USART_IT_RXNE, ENABLE); | ||||
} | ||||
else | ||||
{ | ||||
/* set the Stop bit*/ | ||||
switch (linecoding.format) | ||||
{ | ||||
case 0: | ||||
USART_InitStructure.USART_StopBits = USART_StopBits_1; | ||||
break; | ||||
case 1: | ||||
USART_InitStructure.USART_StopBits = USART_StopBits_1_5; | ||||
break; | ||||
case 2: | ||||
USART_InitStructure.USART_StopBits = USART_StopBits_2; | ||||
break; | ||||
default : | ||||
VCP_COMConfig(DEFAULT_CONFIG); | ||||
return (USBD_FAIL); | ||||
} | ||||
/* set the parity bit*/ | ||||
switch (linecoding.paritytype) | ||||
{ | ||||
case 0: | ||||
USART_InitStructure.USART_Parity = USART_Parity_No; | ||||
break; | ||||
case 1: | ||||
USART_InitStructure.USART_Parity = USART_Parity_Even; | ||||
break; | ||||
case 2: | ||||
USART_InitStructure.USART_Parity = USART_Parity_Odd; | ||||
break; | ||||
default : | ||||
VCP_COMConfig(DEFAULT_CONFIG); | ||||
return (USBD_FAIL); | ||||
} | ||||
/*set the data type : only 8bits and 9bits is supported */ | ||||
switch (linecoding.datatype) | ||||
{ | ||||
case 0x07: | ||||
/* With this configuration a parity (Even or Odd) should be set */ | ||||
USART_InitStructure.USART_WordLength = USART_WordLength_8b; | ||||
break; | ||||
case 0x08: | ||||
if (USART_InitStructure.USART_Parity == USART_Parity_No) | ||||
{ | ||||
USART_InitStructure.USART_WordLength = USART_WordLength_8b; | ||||
} | ||||
else | ||||
{ | ||||
USART_InitStructure.USART_WordLength = USART_WordLength_9b; | ||||
} | ||||
break; | ||||
default : | ||||
VCP_COMConfig(DEFAULT_CONFIG); | ||||
return (USBD_FAIL); | ||||
} | ||||
USART_InitStructure.USART_BaudRate = linecoding.bitrate; | ||||
USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None; | ||||
USART_InitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx; | ||||
/* Configure and enable the USART */ | ||||
STM_EVAL_COMInit(COM1, &USART_InitStructure); | ||||
} | ||||
return USBD_OK; | ||||
} | ||||
/** | ||||
* @brief EVAL_COM_IRQHandler | ||||
* | ||||
* @param None. | ||||
* @retval None. | ||||
*/ | ||||
void EVAL_COM_IRQHandler(void) | ||||
{ | ||||
if (USART_GetITStatus(EVAL_COM1, USART_IT_RXNE) != RESET) | ||||
{ | ||||
/* Send the received data to the PC Host*/ | ||||
VCP_DataTx (0,0); | ||||
} | ||||
/* If overrun condition occurs, clear the ORE flag and recover communication */ | ||||
if (USART_GetFlagStatus(EVAL_COM1, USART_FLAG_ORE) != RESET) | ||||
{ | ||||
(void)USART_ReceiveData(EVAL_COM1); | ||||
} | ||||
} | ||||
/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/ | ||||