695 lines
21 KiB
C
695 lines
21 KiB
C
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/**
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******************************************************************************
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* @file stm32f1xx_hal_cec.c
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* @author MCD Application Team
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* @version V1.1.1
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* @date 12-May-2017
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* @brief CEC HAL module driver.
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* This file provides firmware functions to manage the following
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* functionalities of the High Definition Multimedia Interface
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* Consumer Electronics Control Peripheral (CEC).
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* + Initialization and de-initialization function
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* + IO operation function
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* + Peripheral Control function
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*
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*
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@verbatim
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===============================================================================
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##### How to use this driver #####
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===============================================================================
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[..]
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The CEC HAL driver can be used as follow:
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(#) Declare a CEC_HandleTypeDef handle structure.
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(#) Initialize the CEC low level resources by implementing the HAL_CEC_MspInit ()API:
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(##) Enable the CEC interface clock.
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(##) CEC pins configuration:
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(+++) Enable the clock for the CEC GPIOs.
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(+++) Configure these CEC pins as alternate function pull-up.
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(##) NVIC configuration if you need to use interrupt process (HAL_CEC_Transmit_IT()
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and HAL_CEC_Receive_IT() APIs):
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(+++) Configure the CEC interrupt priority.
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(+++) Enable the NVIC CEC IRQ handle.
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(+++) The specific CEC interrupts (Transmission complete interrupt,
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RXNE interrupt and Error Interrupts) will be managed using the macros
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__HAL_CEC_ENABLE_IT() and __HAL_CEC_DISABLE_IT() inside the transmit
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and receive process.
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(#) Program the Bit Timing Error Mode and the Bit Period Error Mode in the hcec Init structure.
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(#) Initialize the CEC registers by calling the HAL_CEC_Init() API.
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[..]
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(@) This API (HAL_CEC_Init()) configures also the low level Hardware (GPIO, CLOCK, CORTEX...etc)
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by calling the customed HAL_CEC_MspInit() API.
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@endverbatim
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******************************************************************************
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* @attention
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*
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* <h2><center>© COPYRIGHT(c) 2016 STMicroelectronics</center></h2>
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*
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* Redistribution and use in source and binary forms, with or without modification,
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* are permitted provided that the following conditions are met:
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* 1. Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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* 3. Neither the name of STMicroelectronics nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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******************************************************************************
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*/
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/* Includes ------------------------------------------------------------------*/
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#include "stm32f1xx_hal.h"
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#ifdef HAL_CEC_MODULE_ENABLED
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#if defined(STM32F100xB) || defined(STM32F100xE)
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/** @addtogroup STM32F1xx_HAL_Driver
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* @{
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*/
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/** @defgroup CEC CEC
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* @brief HAL CEC module driver
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* @{
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*/
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/* Private typedef -----------------------------------------------------------*/
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/* Private define ------------------------------------------------------------*/
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/** @defgroup CEC_Private_Constants CEC Private Constants
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* @{
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*/
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#define CEC_CFGR_FIELDS (CEC_CFGR_BTEM | CEC_CFGR_BPEM )
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#define CEC_FLAG_TRANSMIT_MASK (CEC_FLAG_TSOM|CEC_FLAG_TEOM|CEC_FLAG_TBTRF)
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#define CEC_FLAG_RECEIVE_MASK (CEC_FLAG_RSOM|CEC_FLAG_REOM|CEC_FLAG_RBTF)
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#define CEC_ESR_ALL_ERROR (CEC_ESR_BTE|CEC_ESR_BPE|CEC_ESR_RBTFE|CEC_ESR_SBE|CEC_ESR_ACKE|CEC_ESR_LINE|CEC_ESR_TBTFE)
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#define CEC_RXXFERSIZE_INITIALIZE 0xFFFF /*!< Value used to initialise the RxXferSize of the handle */
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/**
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* @}
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*/
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/* Private macro -------------------------------------------------------------*/
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/* Private variables ---------------------------------------------------------*/
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/* Private function prototypes -----------------------------------------------*/
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/** @defgroup CEC_Private_Functions CEC Private Functions
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* @{
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*/
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static HAL_StatusTypeDef CEC_Transmit_IT(CEC_HandleTypeDef *hcec);
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static HAL_StatusTypeDef CEC_Receive_IT(CEC_HandleTypeDef *hcec);
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/**
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* @}
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*/
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/* Exported functions ---------------------------------------------------------*/
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/** @defgroup CEC_Exported_Functions CEC Exported Functions
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* @{
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*/
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/** @defgroup CEC_Exported_Functions_Group1 Initialization and de-initialization functions
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* @brief Initialization and Configuration functions
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*
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@verbatim
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===============================================================================
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##### Initialization and Configuration functions #####
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===============================================================================
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[..]
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This subsection provides a set of functions allowing to initialize the CEC
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(+) The following parameters need to be configured:
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(++) TimingErrorFree
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(++) PeriodErrorFree
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(++) InitiatorAddress
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@endverbatim
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* @{
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*/
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/**
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* @brief Initializes the CEC mode according to the specified
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* parameters in the CEC_InitTypeDef and creates the associated handle .
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* @param hcec: CEC handle
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* @retval HAL status
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*/
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HAL_StatusTypeDef HAL_CEC_Init(CEC_HandleTypeDef *hcec)
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{
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/* Check the CEC handle allocation */
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if((hcec == NULL) ||(hcec->Init.RxBuffer == NULL))
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{
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return HAL_ERROR;
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}
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/* Check the parameters */
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assert_param(IS_CEC_ALL_INSTANCE(hcec->Instance));
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assert_param(IS_CEC_BIT_TIMING_ERROR_MODE(hcec->Init.TimingErrorFree));
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assert_param(IS_CEC_BIT_PERIOD_ERROR_MODE(hcec->Init.PeriodErrorFree));
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assert_param(IS_CEC_ADDRESS(hcec->Init.OwnAddress));
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if(hcec->gState == HAL_CEC_STATE_RESET)
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{
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/* Allocate lock resource and initialize it */
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hcec->Lock = HAL_UNLOCKED;
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/* Init the low level hardware : GPIO, CLOCK */
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HAL_CEC_MspInit(hcec);
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}
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hcec->gState = HAL_CEC_STATE_BUSY;
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/* Disable the Peripheral */
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__HAL_CEC_DISABLE(hcec);
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/* Write to CEC Control Register */
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MODIFY_REG(hcec->Instance->CFGR, CEC_CFGR_FIELDS, hcec->Init.TimingErrorFree | hcec->Init.PeriodErrorFree);
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/* Write to CEC Own Address Register */
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MODIFY_REG(hcec->Instance->OAR, CEC_OAR_OA, hcec->Init.OwnAddress);
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/* Configure the prescaler to generate the required 50 microseconds time base.*/
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MODIFY_REG(hcec->Instance->PRES, CEC_PRES_PRES, 50U * (HAL_RCC_GetPCLK1Freq()/1000000U) - 1U);
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/* Enable the following CEC Interrupt */
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__HAL_CEC_ENABLE_IT(hcec, CEC_IT_IE);
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/* Enable the CEC Peripheral */
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__HAL_CEC_ENABLE(hcec);
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hcec->ErrorCode = HAL_CEC_ERROR_NONE;
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hcec->gState = HAL_CEC_STATE_READY;
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hcec->RxState = HAL_CEC_STATE_READY;
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return HAL_OK;
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}
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/**
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* @brief DeInitializes the CEC peripheral
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* @param hcec: CEC handle
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* @retval HAL status
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*/
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HAL_StatusTypeDef HAL_CEC_DeInit(CEC_HandleTypeDef *hcec)
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{
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/* Check the CEC handle allocation */
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if(hcec == NULL)
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{
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return HAL_ERROR;
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}
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/* Check the parameters */
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assert_param(IS_CEC_ALL_INSTANCE(hcec->Instance));
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hcec->gState = HAL_CEC_STATE_BUSY;
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/* DeInit the low level hardware */
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HAL_CEC_MspDeInit(hcec);
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__HAL_RCC_CEC_FORCE_RESET();
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__HAL_RCC_CEC_RELEASE_RESET();
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hcec->ErrorCode = HAL_CEC_ERROR_NONE;
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hcec->gState = HAL_CEC_STATE_RESET;
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hcec->RxState = HAL_CEC_STATE_RESET;
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/* Process Unlock */
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__HAL_UNLOCK(hcec);
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return HAL_OK;
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}
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/**
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* @brief Initializes the Own Address of the CEC device
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* @param hcec: CEC handle
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* @param CEC_OwnAddress: The CEC own address.
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* @retval HAL status
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*/
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HAL_StatusTypeDef HAL_CEC_SetDeviceAddress(CEC_HandleTypeDef *hcec, uint16_t CEC_OwnAddress)
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{
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/* Check the parameters */
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assert_param(IS_CEC_OWN_ADDRESS(CEC_OwnAddress));
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if ((hcec->gState == HAL_CEC_STATE_READY) && (hcec->RxState == HAL_CEC_STATE_READY))
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{
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/* Process Locked */
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__HAL_LOCK(hcec);
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hcec->gState = HAL_CEC_STATE_BUSY;
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/* Disable the Peripheral */
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__HAL_CEC_DISABLE(hcec);
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if(CEC_OwnAddress != CEC_OWN_ADDRESS_NONE)
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{
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MODIFY_REG(hcec->Instance->OAR, CEC_OAR_OA, hcec->Init.OwnAddress);
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}
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else
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{
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CLEAR_BIT(hcec->Instance->OAR, CEC_OAR_OA);
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}
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hcec->gState = HAL_CEC_STATE_READY;
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hcec->ErrorCode = HAL_CEC_ERROR_NONE;
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/* Process Unlocked */
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__HAL_UNLOCK(hcec);
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/* Enable the Peripheral */
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__HAL_CEC_ENABLE(hcec);
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return HAL_OK;
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}
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else
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{
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return HAL_BUSY;
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}
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}
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/**
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* @brief CEC MSP Init
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* @param hcec: CEC handle
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* @retval None
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*/
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__weak void HAL_CEC_MspInit(CEC_HandleTypeDef *hcec)
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{
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/* Prevent unused argument(s) compilation warning */
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UNUSED(hcec);
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/* NOTE : This function should not be modified, when the callback is needed,
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the HAL_CEC_MspInit can be implemented in the user file
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*/
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}
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/**
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* @brief CEC MSP DeInit
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* @param hcec: CEC handle
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* @retval None
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*/
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__weak void HAL_CEC_MspDeInit(CEC_HandleTypeDef *hcec)
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{
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/* Prevent unused argument(s) compilation warning */
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UNUSED(hcec);
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/* NOTE : This function should not be modified, when the callback is needed,
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the HAL_CEC_MspDeInit can be implemented in the user file
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*/
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}
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/**
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* @}
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*/
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/** @defgroup CEC_Exported_Functions_Group2 Input and Output operation functions
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* @brief CEC Transmit/Receive functions
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*
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@verbatim
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===============================================================================
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##### IO operation functions #####
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===============================================================================
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[..]
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This subsection provides a set of functions allowing to manage the CEC data transfers.
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(#) The CEC handle must contain the initiator (TX side) and the destination (RX side)
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logical addresses (4-bit long addresses, 0xF for broadcast messages destination)
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(#) The communication is performed using Interrupts.
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These API's return the HAL status.
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The end of the data processing will be indicated through the
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dedicated CEC IRQ when using Interrupt mode.
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The HAL_CEC_TxCpltCallback(), HAL_CEC_RxCpltCallback() user callbacks
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will be executed respectively at the end of the transmit or Receive process
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The HAL_CEC_ErrorCallback() user callback will be executed when a communication
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error is detected
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(#) API's with Interrupt are :
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(+) HAL_CEC_Transmit_IT()
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(+) HAL_CEC_IRQHandler()
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(#) A set of User Callbacks are provided:
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(+) HAL_CEC_TxCpltCallback()
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(+) HAL_CEC_RxCpltCallback()
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(+) HAL_CEC_ErrorCallback()
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@endverbatim
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* @{
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*/
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/**
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* @brief Send data in interrupt mode
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* @param hcec: CEC handle
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* @param InitiatorAddress: Initiator address
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* @param DestinationAddress: destination logical address
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* @param pData: pointer to input byte data buffer
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* @param Size: amount of data to be sent in bytes (without counting the header).
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* 0 means only the header is sent (ping operation).
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* Maximum TX size is 15 bytes (1 opcode and up to 14 operands).
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* @retval HAL status
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*/
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HAL_StatusTypeDef HAL_CEC_Transmit_IT(CEC_HandleTypeDef *hcec, uint8_t InitiatorAddress,uint8_t DestinationAddress, uint8_t *pData, uint32_t Size)
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{
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/* if the IP isn't already busy and if there is no previous transmission
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already pending due to arbitration lost */
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if(hcec->gState == HAL_CEC_STATE_READY)
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{
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if((pData == NULL ) && (Size > 0U))
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{
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return HAL_ERROR;
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}
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assert_param(IS_CEC_ADDRESS(DestinationAddress));
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assert_param(IS_CEC_ADDRESS(InitiatorAddress));
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assert_param(IS_CEC_MSGSIZE(Size));
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/* Process Locked */
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__HAL_LOCK(hcec);
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hcec->pTxBuffPtr = pData;
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hcec->gState = HAL_CEC_STATE_BUSY_TX;
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hcec->ErrorCode = HAL_CEC_ERROR_NONE;
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/* initialize the number of bytes to send,
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* 0 means only one header is sent (ping operation) */
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hcec->TxXferCount = Size;
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/* send header block */
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hcec->Instance->TXD = (uint8_t)((uint32_t)InitiatorAddress << CEC_INITIATOR_LSB_POS) | DestinationAddress;
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/* Process Unlocked */
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__HAL_UNLOCK(hcec);
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/* case no data to be sent, sender is only pinging the system */
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if (Size != 0)
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{
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/* Set TX Start of Message (TXSOM) bit */
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MODIFY_REG(hcec->Instance->CSR, CEC_FLAG_TRANSMIT_MASK, CEC_FLAG_TSOM);
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}
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else
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{
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/* Send a ping command */
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MODIFY_REG(hcec->Instance->CSR, CEC_FLAG_TRANSMIT_MASK, CEC_FLAG_TEOM|CEC_FLAG_TSOM);
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}
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return HAL_OK;
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}
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else
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{
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return HAL_BUSY;
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}
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}
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/**
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* @brief Get size of the received frame.
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* @param hcec: CEC handle
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* @retval Frame size
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*/
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uint32_t HAL_CEC_GetLastReceivedFrameSize(CEC_HandleTypeDef *hcec)
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{
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return hcec->RxXferSize;
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}
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/**
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* @brief Change Rx Buffer.
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* @param hcec: CEC handle
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* @param Rxbuffer: Rx Buffer
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* @note This function can be called only inside the HAL_CEC_RxCpltCallback()
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* @retval Frame size
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*/
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void HAL_CEC_ChangeRxBuffer(CEC_HandleTypeDef *hcec, uint8_t* Rxbuffer)
|
||
|
{
|
||
|
hcec->Init.RxBuffer = Rxbuffer;
|
||
|
}
|
||
|
|
||
|
/**
|
||
|
* @brief This function handles CEC interrupt requests.
|
||
|
* @param hcec: CEC handle
|
||
|
* @retval None
|
||
|
*/
|
||
|
void HAL_CEC_IRQHandler(CEC_HandleTypeDef *hcec)
|
||
|
{
|
||
|
/* Save error status register for further error handling purposes */
|
||
|
hcec->ErrorCode = READ_BIT(hcec->Instance->ESR, CEC_ESR_ALL_ERROR);
|
||
|
|
||
|
/* Transmit error */
|
||
|
if(__HAL_CEC_GET_FLAG(hcec, CEC_FLAG_TERR) != RESET)
|
||
|
{
|
||
|
/* Acknowledgement of the error */
|
||
|
__HAL_CEC_CLEAR_FLAG(hcec, CEC_FLAG_TERR);
|
||
|
|
||
|
hcec->gState = HAL_CEC_STATE_READY;
|
||
|
}
|
||
|
|
||
|
/* Receive error */
|
||
|
if(__HAL_CEC_GET_FLAG(hcec, CEC_FLAG_RERR) != RESET)
|
||
|
{
|
||
|
/* Acknowledgement of the error */
|
||
|
__HAL_CEC_CLEAR_FLAG(hcec, CEC_FLAG_RERR);
|
||
|
hcec->Init.RxBuffer-=hcec->RxXferSize;
|
||
|
hcec->RxXferSize = 0U;
|
||
|
hcec->RxState = HAL_CEC_STATE_READY;
|
||
|
}
|
||
|
|
||
|
if((hcec->ErrorCode & CEC_ESR_ALL_ERROR) != 0U)
|
||
|
{
|
||
|
/* Error Call Back */
|
||
|
HAL_CEC_ErrorCallback(hcec);
|
||
|
}
|
||
|
|
||
|
/* Transmit byte request or block transfer finished */
|
||
|
if(__HAL_CEC_GET_FLAG(hcec, CEC_FLAG_TBTRF) != RESET)
|
||
|
{
|
||
|
CEC_Transmit_IT(hcec);
|
||
|
}
|
||
|
|
||
|
/* Receive byte or block transfer finished */
|
||
|
if(__HAL_CEC_GET_FLAG(hcec, CEC_FLAG_RBTF) != RESET)
|
||
|
{
|
||
|
if(hcec->RxXferSize == 0U)
|
||
|
{
|
||
|
/* reception is starting */
|
||
|
hcec->RxState = HAL_CEC_STATE_BUSY_RX;
|
||
|
}
|
||
|
CEC_Receive_IT(hcec);
|
||
|
}
|
||
|
}
|
||
|
|
||
|
|
||
|
/**
|
||
|
* @brief Tx Transfer completed callback
|
||
|
* @param hcec: CEC handle
|
||
|
* @retval None
|
||
|
*/
|
||
|
__weak void HAL_CEC_TxCpltCallback(CEC_HandleTypeDef *hcec)
|
||
|
{
|
||
|
/* Prevent unused argument(s) compilation warning */
|
||
|
UNUSED(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
|
||
|
* @param RxFrameSize: Size of frame
|
||
|
* @retval None
|
||
|
*/
|
||
|
__weak void HAL_CEC_RxCpltCallback(CEC_HandleTypeDef *hcec, uint32_t RxFrameSize)
|
||
|
{
|
||
|
/* Prevent unused argument(s) compilation warning */
|
||
|
UNUSED(hcec);
|
||
|
UNUSED(RxFrameSize);
|
||
|
/* NOTE : This function should not be modified, when the callback is needed,
|
||
|
the HAL_CEC_RxCpltCallback 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)
|
||
|
{
|
||
|
/* Prevent unused argument(s) compilation warning */
|
||
|
UNUSED(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 functions
|
||
|
* @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.
|
||
|
(+) HAL_CEC_GetError() API can be helpful to check in run-time the error of the CEC peripheral.
|
||
|
@endverbatim
|
||
|
* @{
|
||
|
*/
|
||
|
/**
|
||
|
* @brief return the CEC state
|
||
|
* @param hcec: pointer to a CEC_HandleTypeDef structure that contains
|
||
|
* the configuration information for the specified CEC module.
|
||
|
* @retval HAL state
|
||
|
*/
|
||
|
HAL_CEC_StateTypeDef HAL_CEC_GetState(CEC_HandleTypeDef *hcec)
|
||
|
{
|
||
|
uint32_t temp1= 0x00U, temp2 = 0x00U;
|
||
|
temp1 = hcec->gState;
|
||
|
temp2 = hcec->RxState;
|
||
|
|
||
|
return (HAL_CEC_StateTypeDef)(temp1 | temp2);
|
||
|
}
|
||
|
|
||
|
/**
|
||
|
* @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;
|
||
|
}
|
||
|
|
||
|
/**
|
||
|
* @}
|
||
|
*/
|
||
|
|
||
|
/**
|
||
|
* @}
|
||
|
*/
|
||
|
|
||
|
/** @addtogroup CEC_Private_Functions
|
||
|
* @{
|
||
|
*/
|
||
|
|
||
|
/**
|
||
|
* @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->gState == HAL_CEC_STATE_BUSY_TX) || (__HAL_CEC_GET_TRANSMISSION_START_FLAG(hcec) != RESET))
|
||
|
{
|
||
|
/* if all data have been sent */
|
||
|
if(hcec->TxXferCount == 0U)
|
||
|
{
|
||
|
/* Acknowledge successful completion by writing 0x00 */
|
||
|
MODIFY_REG(hcec->Instance->CSR, CEC_FLAG_TRANSMIT_MASK, 0x00U);
|
||
|
|
||
|
hcec->gState = HAL_CEC_STATE_READY;
|
||
|
|
||
|
HAL_CEC_TxCpltCallback(hcec);
|
||
|
|
||
|
return HAL_OK;
|
||
|
}
|
||
|
else
|
||
|
{
|
||
|
/* Reduce the number of bytes to transfer by one */
|
||
|
hcec->TxXferCount--;
|
||
|
|
||
|
/* Write data to TX buffer*/
|
||
|
hcec->Instance->TXD = *hcec->pTxBuffPtr++;
|
||
|
|
||
|
/* If this is the last byte of the ongoing transmission */
|
||
|
if(hcec->TxXferCount == 0U)
|
||
|
{
|
||
|
/* Acknowledge byte request and signal end of message */
|
||
|
MODIFY_REG(hcec->Instance->CSR, CEC_FLAG_TRANSMIT_MASK, CEC_FLAG_TEOM);
|
||
|
}
|
||
|
else
|
||
|
{
|
||
|
/* Acknowledge byte request by writing 0x00 */
|
||
|
MODIFY_REG(hcec->Instance->CSR, CEC_FLAG_TRANSMIT_MASK, 0x00U);
|
||
|
}
|
||
|
|
||
|
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)
|
||
|
{
|
||
|
static uint32_t temp;
|
||
|
|
||
|
if(hcec->RxState == HAL_CEC_STATE_BUSY_RX)
|
||
|
{
|
||
|
temp = hcec->Instance->CSR;
|
||
|
|
||
|
/* Store received data */
|
||
|
hcec->RxXferSize++;
|
||
|
*hcec->Init.RxBuffer++ = hcec->Instance->RXD;
|
||
|
|
||
|
/* Acknowledge received byte by writing 0x00 */
|
||
|
MODIFY_REG(hcec->Instance->CSR, CEC_FLAG_RECEIVE_MASK, 0x00U);
|
||
|
|
||
|
/* If the End Of Message is reached */
|
||
|
if(HAL_IS_BIT_SET(temp, CEC_FLAG_REOM))
|
||
|
{
|
||
|
/* Interrupts are not disabled due to transmission still ongoing */
|
||
|
hcec->RxState = HAL_CEC_STATE_READY;
|
||
|
|
||
|
HAL_CEC_RxCpltCallback(hcec, hcec->RxXferSize);
|
||
|
|
||
|
return HAL_OK;
|
||
|
}
|
||
|
else
|
||
|
{
|
||
|
return HAL_BUSY;
|
||
|
}
|
||
|
}
|
||
|
else
|
||
|
{
|
||
|
return HAL_BUSY;
|
||
|
}
|
||
|
}
|
||
|
|
||
|
/**
|
||
|
* @}
|
||
|
*/
|
||
|
|
||
|
/**
|
||
|
* @}
|
||
|
*/
|
||
|
|
||
|
#endif /* defined(STM32F100xB) || defined(STM32F100xE) */
|
||
|
|
||
|
#endif /* HAL_CEC_MODULE_ENABLED */
|
||
|
/**
|
||
|
* @}
|
||
|
*/
|
||
|
|
||
|
/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/
|