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Diffstat (limited to 'c/src/lib/libbsp/arm/stm32f4x/hal/STM32F4xx_HAL_Driver/Src/stm32f4xx_hal_cec.c')
| -rw-r--r-- | c/src/lib/libbsp/arm/stm32f4x/hal/STM32F4xx_HAL_Driver/Src/stm32f4xx_hal_cec.c | 1107 |
1 files changed, 1107 insertions, 0 deletions
diff --git a/c/src/lib/libbsp/arm/stm32f4x/hal/STM32F4xx_HAL_Driver/Src/stm32f4xx_hal_cec.c b/c/src/lib/libbsp/arm/stm32f4x/hal/STM32F4xx_HAL_Driver/Src/stm32f4xx_hal_cec.c new file mode 100644 index 0000000000..156aebf372 --- /dev/null +++ b/c/src/lib/libbsp/arm/stm32f4x/hal/STM32F4xx_HAL_Driver/Src/stm32f4xx_hal_cec.c @@ -0,0 +1,1107 @@ +/** + ****************************************************************************** + * @file stm32f4xx_hal_cec.c + * @author MCD Application Team + * @version V1.4.0 + * @date 14-August-2015 + * @brief CEC HAL module driver. + * + * This file provides firmware functions to manage the following + * functionalities of the High Definition Multimedia Interface + * Consumer Electronics Control Peripheral (CEC). + * + Initialization and de-initialization functions + * + IO operation functions + * + Peripheral Control functions + * + * + @verbatim + =============================================================================== + ##### How to use this driver ##### + =============================================================================== + [..] + The CEC HAL driver can be used as follow: + + (#) Declare a CEC_HandleTypeDef handle structure. + (#) Initialize the CEC low level resources by implementing the HAL_CEC_MspInit ()API: + (##) Enable the CEC interface clock. + (##) CEC pins configuration: + (+) Enable the clock for the CEC GPIOs. + (+) Configure these CEC pins as alternate function pull-up. + (##) NVIC configuration if you need to use interrupt process (HAL_CEC_Transmit_IT() + and HAL_CEC_Receive_IT() APIs): + (+) Configure the CEC interrupt priority. + (+) Enable the NVIC CEC IRQ handle. + (@) The specific CEC interrupts (Transmission complete interrupt, + RXNE interrupt and Error Interrupts) will be managed using the macros + __HAL_CEC_ENABLE_IT() and __HAL_CEC_DISABLE_IT() inside the transmit + and receive process. + + (#) Program the Signal Free Time (SFT) and SFT option, Tolerance, reception stop in + in case of Bit Rising Error, Error-Bit generation conditions, device logical + address and Listen mode in the hcec Init structure. + + (#) Initialize the CEC registers by calling the HAL_CEC_Init() API. + + (@) This API (HAL_CEC_Init()) configures also the low level Hardware GPIO, CLOCK, CORTEX...etc) + by calling the customed HAL_CEC_MspInit() API. + + @endverbatim + ****************************************************************************** + * @attention + * + * <h2><center>© COPYRIGHT(c) 2015 STMicroelectronics</center></h2> + * + * Redistribution and use in source and binary forms, with or without modification, + * are permitted provided that the following conditions are met: + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * 3. Neither the name of STMicroelectronics nor the names of its contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" + * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE + * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR + * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER + * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, + * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + * + ****************************************************************************** + */ + +/* Includes ------------------------------------------------------------------*/ +#include "stm32f4xx_hal.h" + +/** @addtogroup STM32F4xx_HAL_Driver + * @{ + */ + +/** @defgroup CEC CEC + * @brief HAL CEC module driver + * @{ + */ +#ifdef HAL_CEC_MODULE_ENABLED + +#if defined(STM32F446xx) + +/* Private typedef -----------------------------------------------------------*/ +/* Private define ------------------------------------------------------------*/ +/** @defgroup CEC_Private_Constants CEC Private Constants + * @{ + */ +#define CEC_CFGR_FIELDS (CEC_CFGR_SFT | CEC_CFGR_RXTOL | CEC_CFGR_BRESTP \ + | CEC_CFGR_BREGEN | CEC_CFGR_LBPEGEN | CEC_CFGR_SFTOPT \ + | CEC_CFGR_BRDNOGEN | CEC_CFGR_OAR | CEC_CFGR_LSTN) +/** + * @} + */ + +/* Private macro -------------------------------------------------------------*/ +/* Private variables ---------------------------------------------------------*/ +/* Private function prototypes -----------------------------------------------*/ +/** @defgroup CEC_Private_Functions CEC Private Functions + * @{ + */ +static HAL_StatusTypeDef CEC_Transmit_IT(CEC_HandleTypeDef *hcec); +static HAL_StatusTypeDef CEC_Receive_IT(CEC_HandleTypeDef *hcec); +/** + * @} + */ + +/* Exported functions ---------------------------------------------------------*/ +/** @defgroup CEC_Exported_Functions CEC Exported Functions + * @{ + */ + +/** @defgroup CEC_Exported_Functions_Group1 Initialization and de-initialization functions + * @brief Initialization and Configuration functions + * +@verbatim +=============================================================================== + ##### Initialization and Configuration functions ##### + =============================================================================== + [..] + This subsection provides a set of functions allowing to initialize the CEC + (+) The following parameters need to be configured: + (++) SignalFreeTime + (++) Tolerance + (++) BRERxStop (RX stopped or not upon Bit Rising Error) + (++) BREErrorBitGen (Error-Bit generation in case of Bit Rising Error) + (++) LBPEErrorBitGen (Error-Bit generation in case of Long Bit Period Error) + (++) BroadcastMsgNoErrorBitGen (Error-bit generation in case of broadcast message error) + (++) SignalFreeTimeOption (SFT Timer start definition) + (++) OwnAddress (CEC device address) + (++) ListenMode + +@endverbatim + * @{ + */ + +/** + * @brief Initializes the CEC mode according to the specified + * parameters in the CEC_InitTypeDef and creates the associated handle . + * @param hcec: CEC handle + * @retval HAL status + */ +HAL_StatusTypeDef HAL_CEC_Init(CEC_HandleTypeDef *hcec) +{ + uint32_t tmpreg = 0x0; + + /* Check the CEC handle allocation */ + if(hcec == NULL) + { + return HAL_ERROR; + } + + /* Check the parameters */ + assert_param(IS_CEC_ALL_INSTANCE(hcec->Instance)); + assert_param(IS_CEC_SIGNALFREETIME(hcec->Init.SignalFreeTime)); + assert_param(IS_CEC_TOLERANCE(hcec->Init.Tolerance)); + assert_param(IS_CEC_BRERXSTOP(hcec->Init.BRERxStop)); + assert_param(IS_CEC_BREERRORBITGEN(hcec->Init.BREErrorBitGen)); + assert_param(IS_CEC_LBPEERRORBITGEN(hcec->Init.LBPEErrorBitGen)); + assert_param(IS_CEC_BROADCASTERROR_NO_ERRORBIT_GENERATION(hcec->Init.BroadcastMsgNoErrorBitGen)); + assert_param(IS_CEC_SFTOP(hcec->Init.SignalFreeTimeOption)); + assert_param(IS_CEC_OAR_ADDRESS(hcec->Init.OwnAddress)); + assert_param(IS_CEC_LISTENING_MODE(hcec->Init.ListenMode)); + assert_param(IS_CEC_ADDRESS(hcec->Init.InitiatorAddress)); + + + if(hcec->State == HAL_CEC_STATE_RESET) + { + /* Allocate lock resource and initialize it */ + hcec->Lock = HAL_UNLOCKED; + /* Init the low level hardware : GPIO, CLOCK */ + HAL_CEC_MspInit(hcec); + } + + hcec->State = HAL_CEC_STATE_BUSY; + + /* Disable the Peripheral */ + __HAL_CEC_DISABLE(hcec); + + tmpreg = hcec->Init.SignalFreeTime; + tmpreg |= hcec->Init.Tolerance; + tmpreg |= hcec->Init.BRERxStop; + tmpreg |= hcec->Init.BREErrorBitGen; + tmpreg |= hcec->Init.LBPEErrorBitGen; + tmpreg |= hcec->Init.BroadcastMsgNoErrorBitGen; + tmpreg |= hcec->Init.SignalFreeTimeOption; + tmpreg |= (hcec->Init.OwnAddress << CEC_CFGR_OAR_LSB_POS); + tmpreg |= hcec->Init.ListenMode; + + /* Write to CEC Control Register */ + MODIFY_REG(hcec->Instance->CFGR, CEC_CFGR_FIELDS, tmpreg); + + /* Enable the Peripheral */ + __HAL_CEC_ENABLE(hcec); + + hcec->State = HAL_CEC_STATE_READY; + + return HAL_OK; +} + +/** + * @brief DeInitializes the CEC peripheral + * @param hcec: CEC handle + * @retval HAL status + */ +HAL_StatusTypeDef HAL_CEC_DeInit(CEC_HandleTypeDef *hcec) +{ + /* Check the CEC handle allocation */ + if(hcec == NULL) + { + return HAL_ERROR; + } + + /* Check the parameters */ + assert_param(IS_CEC_ALL_INSTANCE(hcec->Instance)); + + hcec->State = HAL_CEC_STATE_BUSY; + + /* DeInit the low level hardware */ + HAL_CEC_MspDeInit(hcec); + /* Disable the Peripheral */ + __HAL_CEC_DISABLE(hcec); + + hcec->ErrorCode = HAL_CEC_ERROR_NONE; + hcec->State = HAL_CEC_STATE_RESET; + + /* Process Unlock */ + __HAL_UNLOCK(hcec); + + return HAL_OK; +} + +/** + * @brief CEC MSP Init + * @param hcec: CEC handle + * @retval None + */ + __weak void HAL_CEC_MspInit(CEC_HandleTypeDef *hcec) +{ + /* NOTE : This function should not be modified, when the callback is needed, + the HAL_CEC_MspInit can be implemented in the user file + */ +} + +/** + * @brief CEC MSP DeInit + * @param hcec: CEC handle + * @retval None + */ + __weak void HAL_CEC_MspDeInit(CEC_HandleTypeDef *hcec) +{ + /* NOTE : This function should not be modified, when the callback is needed, + the HAL_CEC_MspDeInit can be implemented in the user file + */ +} +/** + * @} + */ + +/** @defgroup CEC_Exported_Functions_Group2 Input and Output operation functions + * @brief CEC Transmit/Receive functions + * +@verbatim + =============================================================================== + ##### IO operation functions ##### + =============================================================================== + This subsection provides a set of functions allowing to manage the CEC data transfers. + + (#) The CEC handle must contain the initiator (TX side) and the destination (RX side) + logical addresses (4-bit long addresses, 0xF for broadcast messages destination) + + (#) There are two mode of transfer: + (+) Blocking mode: The communication is performed in polling mode. + The HAL status of all data processing is returned by the same function + after finishing transfer. + (+) No-Blocking mode: The communication is performed using Interrupts. + These API's return the HAL status. + The end of the data processing will be indicated through the + dedicated CEC IRQ when using Interrupt mode. + The HAL_CEC_TxCpltCallback(), HAL_CEC_RxCpltCallback() user callbacks + will be executed respectivelly at the end of the transmit or Receive process + The HAL_CEC_ErrorCallback()user callback will be executed when a communication + error is detected + + (#) Blocking mode API's are : + (+) HAL_CEC_Transmit() + (+) HAL_CEC_Receive() + + (#) Non-Blocking mode API's with Interrupt are : + (+) HAL_CEC_Transmit_IT() + (+) HAL_CEC_Receive_IT() + (+) HAL_CEC_IRQHandler() + + (#) A set of Transfer Complete Callbacks are provided in No_Blocking mode: + (+) HAL_CEC_TxCpltCallback() + (+) HAL_CEC_RxCpltCallback() + (+) HAL_CEC_ErrorCallback() + +@endverbatim + * @{ + */ + +/** + * @brief Send data in blocking mode + * @param hcec: CEC handle + * @param DestinationAddress: destination logical address + * @param pData: pointer to input byte data buffer + * @param Size: amount of data to be sent in bytes (without counting the header). + * 0 means only the header is sent (ping operation). + * Maximum TX size is 15 bytes (1 opcode and up to 14 operands). + * @param Timeout: Timeout duration. + * @retval HAL status + */ +HAL_StatusTypeDef HAL_CEC_Transmit(CEC_HandleTypeDef *hcec, uint8_t DestinationAddress, uint8_t *pData, uint32_t Size, uint32_t Timeout) +{ + uint8_t temp = 0; + uint32_t tempisr = 0; + uint32_t tickstart = 0; + + if((hcec->State == HAL_CEC_STATE_READY) && (__HAL_CEC_GET_TRANSMISSION_START_FLAG(hcec) == RESET)) + { + hcec->ErrorCode = HAL_CEC_ERROR_NONE; + if((pData == NULL ) && (Size > 0)) + { + hcec->State = HAL_CEC_STATE_ERROR; + return HAL_ERROR; + } + + assert_param(IS_CEC_ADDRESS(DestinationAddress)); + assert_param(IS_CEC_MSGSIZE(Size)); + + /* Process Locked */ + __HAL_LOCK(hcec); + + hcec->State = HAL_CEC_STATE_BUSY_TX; + + hcec->TxXferCount = Size; + + /* case no data to be sent, sender is only pinging the system */ + if (Size == 0) + { + /* Set TX End of Message (TXEOM) bit, must be set before writing data to TXDR */ + __HAL_CEC_LAST_BYTE_TX_SET(hcec); + } + + /* send header block */ + temp = ((uint32_t)hcec->Init.InitiatorAddress << CEC_INITIATOR_LSB_POS) | DestinationAddress; + hcec->Instance->TXDR = temp; + /* Set TX Start of Message (TXSOM) bit */ + __HAL_CEC_FIRST_BYTE_TX_SET(hcec); + + while (hcec->TxXferCount > 0) + { + hcec->TxXferCount--; + + tickstart = HAL_GetTick(); + while(HAL_IS_BIT_CLR(hcec->Instance->ISR, CEC_FLAG_TXBR)) + { + if(Timeout != HAL_MAX_DELAY) + { + if((Timeout == 0) || ((HAL_GetTick() - tickstart) > Timeout)) + { + hcec->State = HAL_CEC_STATE_TIMEOUT; + /* Process Unlocked */ + __HAL_UNLOCK(hcec); + return HAL_TIMEOUT; + } + } + + /* check whether error occured while waiting for TXBR to be set: + * has Tx underrun occurred ? + * has Tx error occurred ? + * has Tx Missing Acknowledge error occurred ? + * has Arbitration Loss error occurred ? */ + tempisr = hcec->Instance->ISR; + if ((tempisr & (CEC_FLAG_TXUDR|CEC_FLAG_TXERR|CEC_FLAG_TXACKE|CEC_FLAG_ARBLST)) != 0) + { + /* copy ISR for error handling purposes */ + hcec->ErrorCode = tempisr; + /* clear all error flags by default */ + __HAL_CEC_CLEAR_FLAG(hcec, (CEC_FLAG_TXUDR|CEC_FLAG_TXERR|CEC_FLAG_TXACKE|CEC_FLAG_ARBLST)); + hcec->State = HAL_CEC_STATE_ERROR; + __HAL_UNLOCK(hcec); + return HAL_ERROR; + } + } + /* TXBR to clear BEFORE writing TXDR register */ + __HAL_CEC_CLEAR_FLAG(hcec, CEC_FLAG_TXBR); + if (hcec->TxXferCount == 0) + { + /* if last byte transmission, set TX End of Message (TXEOM) bit */ + __HAL_CEC_LAST_BYTE_TX_SET(hcec); + } + hcec->Instance->TXDR = *pData++; + + /* error check after TX byte write up */ + tempisr = hcec->Instance->ISR; + if ((tempisr & (CEC_FLAG_TXUDR|CEC_FLAG_TXERR|CEC_FLAG_TXACKE|CEC_FLAG_ARBLST)) != 0) + { + /* copy ISR for error handling purposes */ + hcec->ErrorCode = tempisr; + /* clear all error flags by default */ + __HAL_CEC_CLEAR_FLAG(hcec, (CEC_FLAG_TXUDR|CEC_FLAG_TXERR|CEC_FLAG_TXACKE|CEC_FLAG_ARBLST)); + hcec->State = HAL_CEC_STATE_ERROR; + __HAL_UNLOCK(hcec); + return HAL_ERROR; + } + } /* end while (while (hcec->TxXferCount > 0)) */ + + /* if no error up to this point, check that transmission is + * complete, that is wait until TXEOM is reset */ + tickstart = HAL_GetTick(); + + while (HAL_IS_BIT_SET(hcec->Instance->CR, CEC_CR_TXEOM)) + { + if(Timeout != HAL_MAX_DELAY) + { + if((HAL_GetTick() - tickstart) > Timeout) + { + hcec->State = HAL_CEC_STATE_ERROR; + __HAL_UNLOCK(hcec); + return HAL_TIMEOUT; + } + } + } + + /* Final error check once all bytes have been transmitted */ + tempisr = hcec->Instance->ISR; + if ((tempisr & (CEC_FLAG_TXUDR|CEC_FLAG_TXERR|CEC_FLAG_TXACKE)) != 0) + { + /* copy ISR for error handling purposes */ + hcec->ErrorCode = tempisr; + /* clear all error flags by default */ + __HAL_CEC_CLEAR_FLAG(hcec, (CEC_FLAG_TXUDR|CEC_FLAG_TXERR|CEC_FLAG_TXACKE)); + hcec->State = HAL_CEC_STATE_ERROR; + __HAL_UNLOCK(hcec); + return HAL_ERROR; + } + + hcec->State = HAL_CEC_STATE_READY; + __HAL_UNLOCK(hcec); + + return HAL_OK; + } + else + { + return HAL_BUSY; + } +} + +/** + * @brief Receive data in blocking mode. Must be invoked when RXBR has been set. + * @param hcec: CEC handle + * @param pData: pointer to received data buffer. + * @param Timeout: Timeout duration. + * Note that the received data size is not known beforehand, the latter is known + * when the reception is complete and is stored in hcec->RxXferSize. + * hcec->RxXferSize is the sum of opcodes + operands (0 to 14 operands max). + * If only a header is received, hcec->RxXferSize = 0 + * @retval HAL status + */ +HAL_StatusTypeDef HAL_CEC_Receive(CEC_HandleTypeDef *hcec, uint8_t *pData, uint32_t Timeout) +{ + uint32_t temp; + uint32_t tickstart = 0; + + if (hcec->State == HAL_CEC_STATE_READY) + { + hcec->ErrorCode = HAL_CEC_ERROR_NONE; + if (pData == NULL ) + { + hcec->State = HAL_CEC_STATE_ERROR; + return HAL_ERROR; + } + + hcec->RxXferSize = 0; + /* Process Locked */ + __HAL_LOCK(hcec); + + /* Rx loop until CEC_ISR_RXEND is set */ + while (HAL_IS_BIT_CLR(hcec->Instance->ISR, CEC_FLAG_RXEND)) + { + tickstart = HAL_GetTick(); + /* Wait for next byte to be received */ + while (HAL_IS_BIT_CLR(hcec->Instance->ISR, CEC_FLAG_RXBR)) + { + if(Timeout != HAL_MAX_DELAY) + { + if((Timeout == 0) || ((HAL_GetTick() - tickstart) > Timeout)) + { + hcec->State = HAL_CEC_STATE_TIMEOUT; + __HAL_UNLOCK(hcec); + return HAL_TIMEOUT; + } + } + /* any error so far ? + * has Rx Missing Acknowledge occurred ? + * has Rx Long Bit Period error occurred ? + * has Rx Short Bit Period error occurred ? + * has Rx Bit Rising error occurred ? + * has Rx Overrun error occurred ? */ + temp = (uint32_t) (hcec->Instance->ISR); + if ((temp & (CEC_FLAG_RXACKE|CEC_FLAG_LBPE|CEC_FLAG_SBPE|CEC_FLAG_BRE|CEC_FLAG_RXOVR)) != 0) + { + /* copy ISR for error handling purposes */ + hcec->ErrorCode = temp; + /* clear all error flags by default */ + __HAL_CEC_CLEAR_FLAG(hcec,(CEC_FLAG_RXACKE|CEC_FLAG_LBPE|CEC_FLAG_SBPE|CEC_FLAG_BRE|CEC_FLAG_RXOVR)); + hcec->State = HAL_CEC_STATE_ERROR; + __HAL_UNLOCK(hcec); + return HAL_ERROR; + } + } /* while (HAL_IS_BIT_CLR(hcec->Instance->ISR, CEC_ISR_RXBR)) */ + + /* read received data */ + *pData++ = hcec->Instance->RXDR; + temp = (uint32_t) (hcec->Instance->ISR); + /* end of message ? */ + if ((temp & CEC_ISR_RXEND) != 0) + { + assert_param(IS_CEC_MSGSIZE(hcec->RxXferSize)); + __HAL_CEC_CLEAR_FLAG(hcec,CEC_FLAG_RXEND); + hcec->State = HAL_CEC_STATE_READY; + __HAL_UNLOCK(hcec); + return HAL_OK; + } + + /* clear Rx-Byte Received flag */ + __HAL_CEC_CLEAR_FLAG(hcec,CEC_FLAG_RXBR); + /* increment payload byte counter */ + hcec->RxXferSize++; + } /* while (HAL_IS_BIT_CLR(hcec->Instance->ISR, CEC_ISR_RXEND)) */ + + /* if the instructions below are executed, it means RXEND was set when RXBR was + * set for the first time: + * the code within the "while (HAL_IS_BIT_CLR(hcec->Instance->ISR, CEC_ISR_RXEND))" + * loop has not been executed and this means a single byte has been sent */ + *pData++ = hcec->Instance->RXDR; + /* only one header is received: RxXferSize is set to 0 (no operand, no opcode) */ + hcec->RxXferSize = 0; + __HAL_CEC_CLEAR_FLAG(hcec, CEC_FLAG_RXEND); + + hcec->State = HAL_CEC_STATE_READY; + __HAL_UNLOCK(hcec); + return HAL_OK; + } + else + { + return HAL_BUSY; + } +} + +/** + * @brief Send data in interrupt mode + * @param hcec: CEC handle + * @param DestinationAddress: destination logical address + * @param pData: pointer to input byte data buffer + * @param Size: amount of data to be sent in bytes (without counting the header). + * 0 means only the header is sent (ping operation). + * Maximum TX size is 15 bytes (1 opcode and up to 14 operands). + * @retval HAL status + */ +HAL_StatusTypeDef HAL_CEC_Transmit_IT(CEC_HandleTypeDef *hcec, uint8_t DestinationAddress, uint8_t *pData, uint32_t Size) +{ + uint8_t temp = 0; + /* if the IP isn't already busy and if there is no previous transmission + already pending due to arbitration lost */ + if (((hcec->State == HAL_CEC_STATE_READY) || (hcec->State == HAL_CEC_STATE_STANDBY_RX)) + && (__HAL_CEC_GET_TRANSMISSION_START_FLAG(hcec) == RESET)) + { + if((pData == NULL) && (Size > 0)) + { + hcec->State = HAL_CEC_STATE_ERROR; + return HAL_ERROR; + } + + assert_param(IS_CEC_ADDRESS(DestinationAddress)); + assert_param(IS_CEC_MSGSIZE(Size)); + + /* Process Locked */ + __HAL_LOCK(hcec); + hcec->pTxBuffPtr = pData; + hcec->State = HAL_CEC_STATE_BUSY_TX; + hcec->ErrorCode = HAL_CEC_ERROR_NONE; + + /* Disable Peripheral to write CEC_IER register */ + __HAL_CEC_DISABLE(hcec); + + /* Enable the following two CEC Transmission interrupts as + * well as the following CEC Transmission Errors interrupts: + * Tx Byte Request IT + * End of Transmission IT + * Tx Missing Acknowledge IT + * Tx-Error IT + * Tx-Buffer Underrun IT + * Tx arbitration lost */ + __HAL_CEC_ENABLE_IT(hcec, CEC_IT_TXBR|CEC_IT_TXEND|CEC_IER_TX_ALL_ERR); + + /* Enable the Peripheral */ + __HAL_CEC_ENABLE(hcec); + + /* initialize the number of bytes to send, + * 0 means only one header is sent (ping operation) */ + hcec->TxXferCount = Size; + + /* Process Unlocked */ + __HAL_UNLOCK(hcec); + + /* in case of no payload (Size = 0), sender is only pinging the system; + * Set TX End of Message (TXEOM) bit, must be set before writing data to TXDR */ + if (Size == 0) + { + __HAL_CEC_LAST_BYTE_TX_SET(hcec); + } + + /* send header block */ + temp = (uint8_t)((uint32_t)(hcec->Init.InitiatorAddress) << CEC_INITIATOR_LSB_POS) | DestinationAddress; + hcec->Instance->TXDR = temp; + /* Set TX Start of Message (TXSOM) bit */ + __HAL_CEC_FIRST_BYTE_TX_SET(hcec); + + return HAL_OK; + } + /* if the IP is already busy or if there is a previous transmission + already pending due to arbitration loss */ + else if ((hcec->State == HAL_CEC_STATE_BUSY_TX) || (__HAL_CEC_GET_TRANSMISSION_START_FLAG(hcec) != RESET)) + { + __HAL_LOCK(hcec); + /* set state to BUSY TX, in case it wasn't set already (case + * of transmission new attempt after arbitration loss) */ + if (hcec->State != HAL_CEC_STATE_BUSY_TX) + { + hcec->State = HAL_CEC_STATE_BUSY_TX; + } + + /* if all data have been sent */ + if(hcec->TxXferCount == 0) + { + /* Disable Peripheral to write CEC_IER register */ + __HAL_CEC_DISABLE(hcec); + + /* Disable the CEC Transmission Interrupts */ + __HAL_CEC_DISABLE_IT(hcec, CEC_IT_TXBR|CEC_IT_TXEND); + /* Disable the CEC Transmission Error Interrupts */ + __HAL_CEC_DISABLE_IT(hcec, CEC_IER_TX_ALL_ERR); + + /* Enable the Peripheral */ + __HAL_CEC_ENABLE(hcec); + + __HAL_CEC_CLEAR_FLAG(hcec, CEC_FLAG_TXBR|CEC_FLAG_TXEND); + + hcec->State = HAL_CEC_STATE_READY; + /* Call the Process Unlocked before calling the Tx call back API to give the possibility to + start again the Transmission under the Tx call back API */ + __HAL_UNLOCK(hcec); + + HAL_CEC_TxCpltCallback(hcec); + + return HAL_OK; + } + else + { + if (hcec->TxXferCount == 1) + { + /* if this is the last byte transmission, set TX End of Message (TXEOM) bit */ + __HAL_CEC_LAST_BYTE_TX_SET(hcec); + } + /* clear Tx-Byte request flag */ + __HAL_CEC_CLEAR_FLAG(hcec, CEC_FLAG_TXBR); + hcec->Instance->TXDR = *hcec->pTxBuffPtr++; + hcec->TxXferCount--; + + /* Process Unlocked */ + __HAL_UNLOCK(hcec); + + return HAL_OK; + } + } + else + { + return HAL_BUSY; + } +} + +/** + * @brief Receive data in interrupt mode. + * @param hcec: CEC handle + * @param pData: pointer to received data buffer. + * Note that the received data size is not known beforehand, the latter is known + * when the reception is complete and is stored in hcec->RxXferSize. + * hcec->RxXferSize is the sum of opcodes + operands (0 to 14 operands max). + * If only a header is received, hcec->RxXferSize = 0 + * @retval HAL status + */ +HAL_StatusTypeDef HAL_CEC_Receive_IT(CEC_HandleTypeDef *hcec, uint8_t *pData) +{ + if(hcec->State == HAL_CEC_STATE_READY) + { + if(pData == NULL) + { + hcec->State = HAL_CEC_STATE_ERROR; + return HAL_ERROR; + } + + /* Process Locked */ + __HAL_LOCK(hcec); + hcec->RxXferSize = 0; + hcec->pRxBuffPtr = pData; + hcec->ErrorCode = HAL_CEC_ERROR_NONE; + /* the IP is moving to a ready to receive state */ + hcec->State = HAL_CEC_STATE_STANDBY_RX; + + /* Disable Peripheral to write CEC_IER register */ + __HAL_CEC_DISABLE(hcec); + + /* Enable the following CEC Reception Error Interrupts: + * Rx overrun + * Rx bit rising error + * Rx short bit period error + * Rx long bit period error + * Rx missing acknowledge */ + __HAL_CEC_ENABLE_IT(hcec, CEC_IER_RX_ALL_ERR); + + /* Process Unlocked */ + __HAL_UNLOCK(hcec); + + /* Enable the following two CEC Reception interrupts: + * Rx Byte Received IT + * End of Reception IT */ + __HAL_CEC_ENABLE_IT(hcec, CEC_IT_RXBR|CEC_IT_RXEND); + + __HAL_CEC_ENABLE(hcec); + + return HAL_OK; + } + else + { + return HAL_BUSY; + } +} + +/** + * @brief Get size of the received frame. + * @param hcec: CEC handle + * @retval Frame size + */ +uint32_t HAL_CEC_GetReceivedFrameSize(CEC_HandleTypeDef *hcec) +{ + return hcec->RxXferSize; +} + +/** + * @brief This function handles CEC interrupt requests. + * @param hcec: CEC handle + * @retval None + */ +void HAL_CEC_IRQHandler(CEC_HandleTypeDef *hcec) +{ + /* save interrupts register for further error or interrupts handling purposes */ + hcec->ErrorCode = hcec->Instance->ISR; + /* CEC TX missing acknowledge error interrupt occurred -------------------------------------*/ + if((__HAL_CEC_GET_FLAG(hcec, CEC_FLAG_TXACKE) != RESET) && (__HAL_CEC_GET_IT_SOURCE(hcec, CEC_IT_TXACKE) != RESET)) + { + __HAL_CEC_CLEAR_FLAG(hcec, CEC_FLAG_TXACKE); + hcec->State = HAL_CEC_STATE_ERROR; + } + + /* CEC transmit error interrupt occured --------------------------------------*/ + if((__HAL_CEC_GET_FLAG(hcec, CEC_FLAG_TXERR) != RESET) && (__HAL_CEC_GET_IT_SOURCE(hcec, CEC_IT_TXERR) != RESET)) + { + __HAL_CEC_CLEAR_FLAG(hcec, CEC_FLAG_TXERR); + hcec->State = HAL_CEC_STATE_ERROR; + } + + /* CEC TX underrun error interrupt occured --------------------------------------*/ + if((__HAL_CEC_GET_FLAG(hcec, CEC_FLAG_TXUDR) != RESET) && (__HAL_CEC_GET_IT_SOURCE(hcec, CEC_IT_TXUDR) != RESET)) + { + __HAL_CEC_CLEAR_FLAG(hcec, CEC_FLAG_TXUDR); + hcec->State = HAL_CEC_STATE_ERROR; + } + + /* CEC TX arbitration error interrupt occured --------------------------------------*/ + if((__HAL_CEC_GET_FLAG(hcec, CEC_FLAG_ARBLST) != RESET) && (__HAL_CEC_GET_IT_SOURCE(hcec, CEC_IT_ARBLST) != RESET)) + { + __HAL_CEC_CLEAR_FLAG(hcec, CEC_FLAG_ARBLST); + hcec->State = HAL_CEC_STATE_ERROR; + } + + /* CEC RX overrun error interrupt occured --------------------------------------*/ + if((__HAL_CEC_GET_FLAG(hcec, CEC_FLAG_RXOVR) != RESET) && (__HAL_CEC_GET_IT_SOURCE(hcec, CEC_IT_RXOVR) != RESET)) + { + __HAL_CEC_CLEAR_FLAG(hcec, CEC_FLAG_RXOVR); + hcec->State = HAL_CEC_STATE_ERROR; + } + + /* CEC RX bit rising error interrupt occured -------------------------------*/ + if((__HAL_CEC_GET_FLAG(hcec, CEC_FLAG_BRE) != RESET) && (__HAL_CEC_GET_IT_SOURCE(hcec, CEC_IT_BRE) != RESET)) + { + __HAL_CEC_CLEAR_FLAG(hcec, CEC_FLAG_BRE); + hcec->State = HAL_CEC_STATE_ERROR; + } + + /* CEC RX short bit period error interrupt occured -------------------------*/ + if((__HAL_CEC_GET_FLAG(hcec, CEC_FLAG_SBPE) != RESET) && (__HAL_CEC_GET_IT_SOURCE(hcec, CEC_IT_SBPE) != RESET)) + { + __HAL_CEC_CLEAR_FLAG(hcec, CEC_FLAG_SBPE); + hcec->State = HAL_CEC_STATE_ERROR; + } + + /* CEC RX long bit period error interrupt occured --------------------------*/ + if((__HAL_CEC_GET_FLAG(hcec, CEC_FLAG_LBPE) != RESET) && (__HAL_CEC_GET_IT_SOURCE(hcec, CEC_IT_LBPE) != RESET)) + { + __HAL_CEC_CLEAR_FLAG(hcec, CEC_FLAG_LBPE); + hcec->State = HAL_CEC_STATE_ERROR; + } + + /* CEC RX missing acknowledge error interrupt occured ----------------------*/ + if((__HAL_CEC_GET_FLAG(hcec, CEC_FLAG_RXACKE) != RESET) && (__HAL_CEC_GET_IT_SOURCE(hcec, CEC_IT_RXACKE) != RESET)) + { + __HAL_CEC_CLEAR_FLAG(hcec, CEC_FLAG_RXACKE); + hcec->State = HAL_CEC_STATE_ERROR; + } + + if ((hcec->ErrorCode & CEC_ISR_ALL_ERROR) != 0) + { + HAL_CEC_ErrorCallback(hcec); + } + + /* CEC RX byte received interrupt -----------------------------------------*/ + if((__HAL_CEC_GET_FLAG(hcec, CEC_FLAG_RXBR) != RESET) && (__HAL_CEC_GET_IT_SOURCE(hcec, CEC_IT_RXBR) != RESET)) + { + /* RXBR IT is cleared during HAL_CEC_Transmit_IT processing */ + CEC_Receive_IT(hcec); + } + + /* CEC RX end received interrupt ------------------------------------------*/ + if((__HAL_CEC_GET_FLAG(hcec, CEC_FLAG_RXEND) != RESET) && (__HAL_CEC_GET_IT_SOURCE(hcec, CEC_IT_RXEND) != RESET)) + { + /* RXBR IT is cleared during HAL_CEC_Transmit_IT processing */ + CEC_Receive_IT(hcec); + } + + /* CEC TX byte request interrupt -------------------------------------------*/ + if((__HAL_CEC_GET_FLAG(hcec, CEC_FLAG_TXBR) != RESET) &&(__HAL_CEC_GET_IT_SOURCE(hcec, CEC_IT_TXBR) != RESET)) + { + /* TXBR IT is cleared during HAL_CEC_Transmit_IT processing */ + CEC_Transmit_IT(hcec); + } + + /* CEC TX end interrupt ----------------------------------------------------*/ + if((__HAL_CEC_GET_FLAG(hcec, CEC_FLAG_TXEND) != RESET) &&(__HAL_CEC_GET_IT_SOURCE(hcec, CEC_IT_TXEND) != RESET)) + { + /* TXEND IT is cleared during HAL_CEC_Transmit_IT processing */ + CEC_Transmit_IT(hcec); + } +} + +/** + * @brief Tx Transfer completed callback + * @param hcec: CEC handle + * @retval None + */ + __weak void HAL_CEC_TxCpltCallback(CEC_HandleTypeDef *hcec) +{ + /* NOTE : This function should not be modified, when the callback is needed, + the HAL_CEC_TxCpltCallback can be implemented in the user file + */ +} + +/** + * @brief Rx Transfer completed callback + * @param hcec: CEC handle + * @retval None + */ +__weak void HAL_CEC_RxCpltCallback(CEC_HandleTypeDef *hcec) +{ + /* NOTE : This function should not be modified, when the callback is needed, + the HAL_CEC_TxCpltCallback can be implemented in the user file + */ +} + +/** + * @brief CEC error callbacks + * @param hcec: CEC handle + * @retval None + */ + __weak void HAL_CEC_ErrorCallback(CEC_HandleTypeDef *hcec) +{ + /* NOTE : This function should not be modified, when the callback is needed, + the HAL_CEC_ErrorCallback can be implemented in the user file + */ +} +/** + * @} + */ + +/** @defgroup CEC_Exported_Functions_Group3 Peripheral Control function + * @brief CEC control functions + * +@verbatim + =============================================================================== + ##### Peripheral Control function ##### + =============================================================================== + [..] + This subsection provides a set of functions allowing to control the CEC. + (+) HAL_CEC_GetState() API can be helpful to check in run-time the state of the CEC peripheral. +@endverbatim + * @{ + */ +/** + * @brief return the CEC state + * @param hcec: CEC handle + * @retval HAL state + */ +HAL_CEC_StateTypeDef HAL_CEC_GetState(CEC_HandleTypeDef *hcec) +{ + return hcec->State; +} + +/** +* @brief Return the CEC error code +* @param hcec : pointer to a CEC_HandleTypeDef structure that contains + * the configuration information for the specified CEC. +* @retval CEC Error Code +*/ +uint32_t HAL_CEC_GetError(CEC_HandleTypeDef *hcec) +{ + return hcec->ErrorCode; +} + +/** + * @} + */ + +/** + * @brief Send data in interrupt mode + * @param hcec: CEC handle. + * Function called under interruption only, once + * interruptions have been enabled by HAL_CEC_Transmit_IT() + * @retval HAL status + */ +static HAL_StatusTypeDef CEC_Transmit_IT(CEC_HandleTypeDef *hcec) +{ + /* if the IP is already busy or if there is a previous transmission + already pending due to arbitration loss */ + if ((hcec->State == HAL_CEC_STATE_BUSY_TX) + || (__HAL_CEC_GET_TRANSMISSION_START_FLAG(hcec) != RESET)) + { + __HAL_LOCK(hcec); + /* set state to BUSY TX, in case it wasn't set already (case + * of transmission new attempt after arbitration loss) */ + if (hcec->State != HAL_CEC_STATE_BUSY_TX) + { + hcec->State = HAL_CEC_STATE_BUSY_TX; + } + + /* if all data have been sent */ + if(hcec->TxXferCount == 0) + { + /* Disable Peripheral to write CEC_IER register */ + __HAL_CEC_DISABLE(hcec); + + /* Disable the CEC Transmission Interrupts */ + __HAL_CEC_DISABLE_IT(hcec, CEC_IT_TXBR|CEC_IT_TXEND); + /* Disable the CEC Transmission Error Interrupts */ + __HAL_CEC_DISABLE_IT(hcec, CEC_IER_TX_ALL_ERR); + + /* Enable the Peripheral */ + __HAL_CEC_ENABLE(hcec); + + __HAL_CEC_CLEAR_FLAG(hcec,CEC_FLAG_TXBR|CEC_FLAG_TXEND); + + hcec->State = HAL_CEC_STATE_READY; + /* Call the Process Unlocked before calling the Tx call back API to give the possibility to + start again the Transmission under the Tx call back API */ + __HAL_UNLOCK(hcec); + + HAL_CEC_TxCpltCallback(hcec); + + return HAL_OK; + } + else + { + if (hcec->TxXferCount == 1) + { + /* if this is the last byte transmission, set TX End of Message (TXEOM) bit */ + __HAL_CEC_LAST_BYTE_TX_SET(hcec); + } + /* clear Tx-Byte request flag */ + __HAL_CEC_CLEAR_FLAG(hcec,CEC_FLAG_TXBR); + hcec->Instance->TXDR = *hcec->pTxBuffPtr++; + hcec->TxXferCount--; + + /* Process Unlocked */ + __HAL_UNLOCK(hcec); + + return HAL_OK; + } + } + else + { + return HAL_BUSY; + } +} + + +/** + * @brief Receive data in interrupt mode. + * @param hcec: CEC handle. + * Function called under interruption only, once + * interruptions have been enabled by HAL_CEC_Receive_IT() + * @retval HAL status + */ +static HAL_StatusTypeDef CEC_Receive_IT(CEC_HandleTypeDef *hcec) +{ + uint32_t tempisr; + + /* Three different conditions are tested to carry out the RX IT processing: + * - the IP is in reception stand-by (the IP state is HAL_CEC_STATE_STANDBY_RX) and + * the reception of the first byte is starting + * - a message reception is already on-going (the IP state is HAL_CEC_STATE_BUSY_RX) + * and a new byte is being received + * - a transmission has just been started (the IP state is HAL_CEC_STATE_BUSY_TX) + * but has been interrupted by a new message reception or discarded due to + * arbitration loss: the reception of the first or higher priority message + * (the arbitration winner) is starting */ + if ((hcec->State == HAL_CEC_STATE_STANDBY_RX) + || (hcec->State == HAL_CEC_STATE_BUSY_RX) + || (hcec->State == HAL_CEC_STATE_BUSY_TX)) + { + /* reception is starting */ + hcec->State = HAL_CEC_STATE_BUSY_RX; + tempisr = (uint32_t) (hcec->Instance->ISR); + if ((tempisr & CEC_FLAG_RXBR) != 0) + { + /* Process Locked */ + __HAL_LOCK(hcec); + /* read received byte */ + *hcec->pRxBuffPtr++ = hcec->Instance->RXDR; + /* if last byte has been received */ + if ((tempisr & CEC_FLAG_RXEND) != 0) + { + /* clear IT */ + __HAL_CEC_CLEAR_FLAG(hcec,CEC_FLAG_RXBR|CEC_FLAG_RXEND); + /* RX interrupts are not disabled at this point. + * Indeed, to disable the IT, the IP must be disabled first + * which resets the TXSOM flag. In case of arbitration loss, + * this leads to a transmission abort. + * Therefore, RX interruptions disabling if so required, + * is done in HAL_CEC_RxCpltCallback */ + + /* IP state is moved to READY. + * If the IP must remain in standby mode to listen + * any new message, it is up to HAL_CEC_RxCpltCallback + * to move it again to HAL_CEC_STATE_STANDBY_RX */ + hcec->State = HAL_CEC_STATE_READY; + + /* Call the Process Unlocked before calling the Rx call back API */ + __HAL_UNLOCK(hcec); + HAL_CEC_RxCpltCallback(hcec); + + return HAL_OK; + } + __HAL_CEC_CLEAR_FLAG(hcec, CEC_FLAG_RXBR); + + hcec->RxXferSize++; + /* Process Unlocked */ + __HAL_UNLOCK(hcec); + + return HAL_OK; + } + else + { + return HAL_BUSY; + } + } + else + { + return HAL_BUSY; + } +} +/** + * @} + */ + +#endif /* STM32F446xx */ + +#endif /* HAL_CEC_MODULE_ENABLED */ +/** + * @} + */ + +/** + * @} + */ + +/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/ |