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micropython/stmhal/usbd_cdc_interface.c

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/**
******************************************************************************
* @file USB_Device/CDC_Standalone/Src/usbd_cdc_interface.c
* @author MCD Application Team
* @version V1.0.1
* @date 26-February-2014
* @brief Source file for USBD CDC interface
******************************************************************************
* @attention
*
* <h2><center>&copy; COPYRIGHT(c) 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.
*
******************************************************************************
*/
/* Includes ------------------------------------------------------------------*/
#include "stm32f4xx_hal.h"
#include "usbd_cdc_interface.h"
/** @addtogroup STM32_USB_OTG_DEVICE_LIBRARY
* @{
*/
/** @defgroup USBD_CDC
* @brief usbd core module
* @{
*/
/* Private typedef -----------------------------------------------------------*/
/* Private define ------------------------------------------------------------*/
#define APP_RX_DATA_SIZE 2048
#define APP_TX_DATA_SIZE 2048
/* Private macro -------------------------------------------------------------*/
/* Private variables ---------------------------------------------------------*/
USBD_CDC_LineCodingTypeDef LineCoding =
{
115200, /* baud rate*/
0x00, /* stop bits-1*/
0x00, /* parity - none*/
0x08 /* nb. of bits 8*/
};
uint8_t UserRxBuffer[APP_RX_DATA_SIZE];/* Received Data over USB are stored in this buffer */
uint8_t UserTxBuffer[APP_TX_DATA_SIZE];/* Received Data over UART (CDC interface) are stored in this buffer */
uint32_t BuffLength;
uint32_t UserTxBufPtrIn = 0;/* Increment this pointer or roll it back to
start address when data are received over USART */
uint32_t UserTxBufPtrOut = 0; /* Increment this pointer or roll it back to
start address when data are sent over USB */
/* UART handler declaration */
UART_HandleTypeDef UartHandle;
/* TIM handler declaration */
TIM_HandleTypeDef TimHandle;
/* USB handler declaration */
extern USBD_HandleTypeDef hUSBDDevice;
/* Private function prototypes -----------------------------------------------*/
static int8_t CDC_Itf_Init (void);
static int8_t CDC_Itf_DeInit (void);
static int8_t CDC_Itf_Control (uint8_t cmd, uint8_t* pbuf, uint16_t length);
static int8_t CDC_Itf_Receive (uint8_t* pbuf, uint32_t *Len);
static void Error_Handler(void);
static void ComPort_Config(void);
//static void TIM_Config(void);
USBD_CDC_ItfTypeDef USBD_CDC_fops =
{
CDC_Itf_Init,
CDC_Itf_DeInit,
CDC_Itf_Control,
CDC_Itf_Receive
};
/* Private functions ---------------------------------------------------------*/
/**
* @brief CDC_Itf_Init
* Initializes the CDC media low layer
* @param None
* @retval Result of the opeartion: USBD_OK if all operations are OK else USBD_FAIL
*/
static int8_t CDC_Itf_Init(void)
{
#if 0
/*##-1- Configure the UART peripheral ######################################*/
/* Put the USART peripheral in the Asynchronous mode (UART Mode) */
/* USART configured as follow:
- Word Length = 8 Bits
- Stop Bit = One Stop bit
- Parity = No parity
- BaudRate = 115200 baud
- Hardware flow control disabled (RTS and CTS signals) */
UartHandle.Instance = USARTx;
UartHandle.Init.BaudRate = 115200;
UartHandle.Init.WordLength = UART_WORDLENGTH_8B;
UartHandle.Init.StopBits = UART_STOPBITS_1;
UartHandle.Init.Parity = UART_PARITY_NONE;
UartHandle.Init.HwFlowCtl = UART_HWCONTROL_NONE;
UartHandle.Init.Mode = UART_MODE_TX_RX;
if(HAL_UART_Init(&UartHandle) != HAL_OK)
{
/* Initialization Error */
Error_Handler();
}
/*##-2- Put UART peripheral in IT reception process ########################*/
/* Any data received will be stored in "UserTxBuffer" buffer */
if(HAL_UART_Receive_IT(&UartHandle, (uint8_t *)UserTxBuffer, 1) != HAL_OK)
{
/* Transfer error in reception process */
Error_Handler();
}
/*##-3- Configure the TIM Base generation #################################*/
TIM_Config();
/*##-4- Start the TIM Base generation in interrupt mode ####################*/
/* Start Channel1 */
if(HAL_TIM_Base_Start_IT(&TimHandle) != HAL_OK)
{
/* Starting Error */
Error_Handler();
}
#endif
/*##-5- Set Application Buffers ############################################*/
USBD_CDC_SetTxBuffer(&hUSBDDevice, UserTxBuffer, 0);
USBD_CDC_SetRxBuffer(&hUSBDDevice, UserRxBuffer);
return (USBD_OK);
}
/**
* @brief CDC_Itf_DeInit
* DeInitializes the CDC media low layer
* @param None
* @retval Result of the opeartion: USBD_OK if all operations are OK else USBD_FAIL
*/
static int8_t CDC_Itf_DeInit(void)
{
#if 0
/* DeInitialize the UART peripheral */
if(HAL_UART_DeInit(&UartHandle) != HAL_OK)
{
/* Initialization Error */
Error_Handler();
}
#endif
return (USBD_OK);
}
/**
* @brief CDC_Itf_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 opeartion: USBD_OK if all operations are OK else USBD_FAIL
*/
static int8_t CDC_Itf_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];
/* Set the new configuration */
ComPort_Config();
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 (USBD_OK);
}
/**
* @brief TIM period elapsed callback
* @param htim: TIM handle
* @retval None
*/
void HAL_TIM_PeriodElapsedCallback(TIM_HandleTypeDef *htim)
{
uint32_t buffptr;
uint32_t buffsize;
if(UserTxBufPtrOut != UserTxBufPtrIn)
{
if(UserTxBufPtrOut > UserTxBufPtrIn) /* rollback */
{
buffsize = APP_RX_DATA_SIZE - UserTxBufPtrOut;
}
else
{
buffsize = UserTxBufPtrIn - UserTxBufPtrOut;
}
buffptr = UserTxBufPtrOut;
USBD_CDC_SetTxBuffer(&hUSBDDevice, (uint8_t*)&UserTxBuffer[buffptr], buffsize);
if(USBD_CDC_TransmitPacket(&hUSBDDevice) == USBD_OK)
{
UserTxBufPtrOut += buffsize;
if (UserTxBufPtrOut == APP_RX_DATA_SIZE)
{
UserTxBufPtrOut = 0;
}
}
}
}
/**
* @brief Rx Transfer completed callback
* @param huart: UART handle
* @retval None
*/
void HAL_UART_RxCpltCallback(UART_HandleTypeDef *huart)
{
/* Increment Index for buffer writing */
UserTxBufPtrIn++;
/* To avoid buffer overflow */
if(UserTxBufPtrIn == APP_RX_DATA_SIZE)
{
UserTxBufPtrIn = 0;
}
/* Start another reception: provide the buffer pointer with offset and the buffer size */
HAL_UART_Receive_IT(huart, (uint8_t *)(UserTxBuffer + UserTxBufPtrIn), 1);
}
/**
* @brief CDC_Itf_DataRx
* Data received over USB OUT endpoint are sent over CDC interface
* through this function.
* @param Buf: Buffer of data to be transmitted
* @param Len: Number of data received (in bytes)
* @retval Result of the opeartion: USBD_OK if all operations are OK else USBD_FAIL
*/
static int8_t CDC_Itf_Receive(uint8_t* Buf, uint32_t *Len)
{
HAL_UART_Transmit_DMA(&UartHandle, Buf, *Len);
return (USBD_OK);
}
/**
* @brief Tx Transfer completed callback
* @param huart: UART handle
* @retval None
*/
void HAL_UART_TxCpltCallback(UART_HandleTypeDef *huart)
{
/* Initiate next USB packet transfer once UART completes transfer (transmitting data over Tx line) */
USBD_CDC_ReceivePacket(&hUSBDDevice);
}
/**
* @brief ComPort_Config
* Configure the COM Port with the parameters received from host.
* @param None.
* @retval None.
* @note When a configuration is not supported, a default value is used.
*/
static void ComPort_Config(void)
{
if(HAL_UART_DeInit(&UartHandle) != HAL_OK)
{
/* Initialization Error */
Error_Handler();
}
/* set the Stop bit */
switch (LineCoding.format)
{
case 0:
UartHandle.Init.StopBits = UART_STOPBITS_1;
break;
case 2:
UartHandle.Init.StopBits = UART_STOPBITS_2;
break;
default :
UartHandle.Init.StopBits = UART_STOPBITS_1;
break;
}
/* set the parity bit*/
switch (LineCoding.paritytype)
{
case 0:
UartHandle.Init.Parity = UART_PARITY_NONE;
break;
case 1:
UartHandle.Init.Parity = UART_PARITY_ODD;
break;
case 2:
UartHandle.Init.Parity = UART_PARITY_EVEN;
break;
default :
UartHandle.Init.Parity = UART_PARITY_NONE;
break;
}
/*set the data type : only 8bits and 9bits is supported */
switch (LineCoding.datatype)
{
case 0x07:
/* With this configuration a parity (Even or Odd) must be set */
UartHandle.Init.WordLength = UART_WORDLENGTH_8B;
break;
case 0x08:
if(UartHandle.Init.Parity == UART_PARITY_NONE)
{
UartHandle.Init.WordLength = UART_WORDLENGTH_8B;
}
else
{
UartHandle.Init.WordLength = UART_WORDLENGTH_9B;
}
break;
default :
UartHandle.Init.WordLength = UART_WORDLENGTH_8B;
break;
}
UartHandle.Init.BaudRate = LineCoding.bitrate;
UartHandle.Init.HwFlowCtl = UART_HWCONTROL_NONE;
UartHandle.Init.Mode = UART_MODE_TX_RX;
if(HAL_UART_Init(&UartHandle) != HAL_OK)
{
/* Initialization Error */
Error_Handler();
}
/* Start reception: provide the buffer pointer with offset and the buffer size */
HAL_UART_Receive_IT(&UartHandle, (uint8_t *)(UserTxBuffer + UserTxBufPtrIn), 1);
}
/**
* @brief TIM_Config: Configure TIMx timer
* @param None.
* @retval None.
*/
#if 0
static void TIM_Config(void)
{
/* Set TIMx instance */
TimHandle.Instance = TIMx;
/* Initialize TIM3 peripheral as follow:
+ Period = 10000 - 1
+ Prescaler = ((SystemCoreClock/2)/10000) - 1
+ ClockDivision = 0
+ Counter direction = Up
*/
TimHandle.Init.Period = (CDC_POLLING_INTERVAL*1000) - 1;
TimHandle.Init.Prescaler = 84-1;
TimHandle.Init.ClockDivision = 0;
TimHandle.Init.CounterMode = TIM_COUNTERMODE_UP;
if(HAL_TIM_Base_Init(&TimHandle) != HAL_OK)
{
/* Initialization Error */
Error_Handler();
}
}
#endif
/**
* @brief UART error callbacks
* @param UartHandle: UART handle
* @retval None
*/
void HAL_UART_ErrorCallback(UART_HandleTypeDef *UartHandle)
{
/* Transfer error occured in reception and/or transmission process */
Error_Handler();
}
/**
* @brief This function is executed in case of error occurrence.
* @param None
* @retval None
*/
static void Error_Handler(void)
{
/* Add your own code here */
}
/**
* @}
*/
/**
* @}
*/
/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/
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