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targets/cmsis/TARGET_STM/TARGET_STM32F1/stm32f1xx_hal_cec.c@124:6a4a5b7d7324, 2016-05-09 (annotated)

Committer:
mbed_official
Date:
Mon May 09 18:30:12 2016 +0100
Revision:
124:6a4a5b7d7324
Parent:
0:9b334a45a8ff
Child:
144:ef7eb2e8f9f7
Synchronized with git revision ad75bdcde34d7da9d54b7669010c7fb968a99c7c



Full URL: https://github.com/mbedmicro/mbed/commit/ad75bdcde34d7da9d54b7669010c7fb968a99c7c/



[STMF1] Stm32f1_hal_cube update

Who changed what in which revision?

UserRevisionLine numberNew contents of line
bogdanm 0:9b334a45a8ff 1 /**
bogdanm 0:9b334a45a8ff 2 ******************************************************************************
bogdanm 0:9b334a45a8ff 3 * @file stm32f1xx_hal_cec.c
bogdanm 0:9b334a45a8ff 4 * @author MCD Application Team
mbed_official 124:6a4a5b7d7324 5 * @version V1.0.4
mbed_official 124:6a4a5b7d7324 6 * @date 29-April-2016
bogdanm 0:9b334a45a8ff 7 * @brief CEC HAL module driver.
bogdanm 0:9b334a45a8ff 8 * This file provides firmware functions to manage the following
bogdanm 0:9b334a45a8ff 9 * functionalities of the High Definition Multimedia Interface
bogdanm 0:9b334a45a8ff 10 * Consumer Electronics Control Peripheral (CEC).
bogdanm 0:9b334a45a8ff 11 * + Initialization and de-initialization functions
bogdanm 0:9b334a45a8ff 12 * + IO operation functions
bogdanm 0:9b334a45a8ff 13 * + Peripheral Control functions
bogdanm 0:9b334a45a8ff 14 *
bogdanm 0:9b334a45a8ff 15 * @verbatim
bogdanm 0:9b334a45a8ff 16 ==============================================================================
bogdanm 0:9b334a45a8ff 17 ##### How to use this driver #####
bogdanm 0:9b334a45a8ff 18 ==============================================================================
bogdanm 0:9b334a45a8ff 19 [..]
bogdanm 0:9b334a45a8ff 20 The CEC HAL driver can be used as follows:
bogdanm 0:9b334a45a8ff 21 (#) Declare a CEC_HandleTypeDef handle structure.
bogdanm 0:9b334a45a8ff 22 (#) Initialize the CEC low level resources by implementing the HAL_CEC_MspInit ()API:
bogdanm 0:9b334a45a8ff 23 (##) Enable the CEC interface clock.
bogdanm 0:9b334a45a8ff 24 (##) Enable the clock for the CEC GPIOs.
bogdanm 0:9b334a45a8ff 25 (##) Configure these CEC pins as alternate function pull-up.
bogdanm 0:9b334a45a8ff 26 (##) NVIC configuration if you need to use interrupt process (HAL_CEC_Transmit_IT()
bogdanm 0:9b334a45a8ff 27 and HAL_CEC_Receive_IT() APIs):
bogdanm 0:9b334a45a8ff 28 (##) Configure the CEC interrupt priority.
bogdanm 0:9b334a45a8ff 29 (##) Enable the NVIC CEC IRQ handle.
bogdanm 0:9b334a45a8ff 30 (##) The CEC interrupt is activated/deactivated by the HAL driver
bogdanm 0:9b334a45a8ff 31
bogdanm 0:9b334a45a8ff 32 (#) Program the Bit Timing Error Mode and the Bit Period Error Mode in the hcec Init structure.
bogdanm 0:9b334a45a8ff 33
bogdanm 0:9b334a45a8ff 34 (#) Initialize the CEC registers by calling the HAL_CEC_Init() API.
bogdanm 0:9b334a45a8ff 35
bogdanm 0:9b334a45a8ff 36 (#) This API (HAL_CEC_Init()) configures also the low level Hardware GPIO, CLOCK, CORTEX...etc)
bogdanm 0:9b334a45a8ff 37 by calling the customized HAL_CEC_MspInit() API.
bogdanm 0:9b334a45a8ff 38
bogdanm 0:9b334a45a8ff 39 @endverbatim
bogdanm 0:9b334a45a8ff 40 ******************************************************************************
bogdanm 0:9b334a45a8ff 41 * @attention
bogdanm 0:9b334a45a8ff 42 *
mbed_official 124:6a4a5b7d7324 43 * <h2><center>&copy; COPYRIGHT(c) 2016 STMicroelectronics</center></h2>
bogdanm 0:9b334a45a8ff 44 *
bogdanm 0:9b334a45a8ff 45 * Redistribution and use in source and binary forms, with or without modification,
bogdanm 0:9b334a45a8ff 46 * are permitted provided that the following conditions are met:
bogdanm 0:9b334a45a8ff 47 * 1. Redistributions of source code must retain the above copyright notice,
bogdanm 0:9b334a45a8ff 48 * this list of conditions and the following disclaimer.
bogdanm 0:9b334a45a8ff 49 * 2. Redistributions in binary form must reproduce the above copyright notice,
bogdanm 0:9b334a45a8ff 50 * this list of conditions and the following disclaimer in the documentation
bogdanm 0:9b334a45a8ff 51 * and/or other materials provided with the distribution.
bogdanm 0:9b334a45a8ff 52 * 3. Neither the name of STMicroelectronics nor the names of its contributors
bogdanm 0:9b334a45a8ff 53 * may be used to endorse or promote products derived from this software
bogdanm 0:9b334a45a8ff 54 * without specific prior written permission.
bogdanm 0:9b334a45a8ff 55 *
bogdanm 0:9b334a45a8ff 56 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
bogdanm 0:9b334a45a8ff 57 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
bogdanm 0:9b334a45a8ff 58 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
bogdanm 0:9b334a45a8ff 59 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
bogdanm 0:9b334a45a8ff 60 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
bogdanm 0:9b334a45a8ff 61 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
bogdanm 0:9b334a45a8ff 62 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
bogdanm 0:9b334a45a8ff 63 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
bogdanm 0:9b334a45a8ff 64 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
bogdanm 0:9b334a45a8ff 65 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
bogdanm 0:9b334a45a8ff 66 *
bogdanm 0:9b334a45a8ff 67 ******************************************************************************
bogdanm 0:9b334a45a8ff 68 */
bogdanm 0:9b334a45a8ff 69
bogdanm 0:9b334a45a8ff 70 /* Includes ------------------------------------------------------------------*/
bogdanm 0:9b334a45a8ff 71 #include "stm32f1xx_hal.h"
bogdanm 0:9b334a45a8ff 72
bogdanm 0:9b334a45a8ff 73 #ifdef HAL_CEC_MODULE_ENABLED
bogdanm 0:9b334a45a8ff 74
bogdanm 0:9b334a45a8ff 75 #if defined(STM32F100xB) || defined(STM32F100xE)
bogdanm 0:9b334a45a8ff 76
bogdanm 0:9b334a45a8ff 77 /** @addtogroup STM32F1xx_HAL_Driver
bogdanm 0:9b334a45a8ff 78 * @{
bogdanm 0:9b334a45a8ff 79 */
bogdanm 0:9b334a45a8ff 80
bogdanm 0:9b334a45a8ff 81 /** @defgroup CEC CEC
bogdanm 0:9b334a45a8ff 82 * @brief HAL CEC module driver
bogdanm 0:9b334a45a8ff 83 * @{
bogdanm 0:9b334a45a8ff 84 */
bogdanm 0:9b334a45a8ff 85
bogdanm 0:9b334a45a8ff 86 /* Private typedef -----------------------------------------------------------*/
bogdanm 0:9b334a45a8ff 87 /* Private define ------------------------------------------------------------*/
bogdanm 0:9b334a45a8ff 88 /** @defgroup CEC_Private_Constants CEC Private Constants
bogdanm 0:9b334a45a8ff 89 * @{
bogdanm 0:9b334a45a8ff 90 */
bogdanm 0:9b334a45a8ff 91 #define CEC_CFGR_FIELDS (CEC_CFGR_BTEM | CEC_CFGR_BPEM )
bogdanm 0:9b334a45a8ff 92 #define CEC_FLAG_TRANSMIT_MASK (CEC_FLAG_TSOM|CEC_FLAG_TEOM|CEC_FLAG_TBTRF)
bogdanm 0:9b334a45a8ff 93 #define CEC_FLAG_RECEIVE_MASK (CEC_FLAG_RSOM|CEC_FLAG_REOM|CEC_FLAG_RBTF)
bogdanm 0:9b334a45a8ff 94 #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)
bogdanm 0:9b334a45a8ff 95 #define CEC_RXXFERSIZE_INITIALIZE 0xFFFF /*!< Value used to initialise the RxXferSize of the handle */
bogdanm 0:9b334a45a8ff 96 /**
bogdanm 0:9b334a45a8ff 97 * @}
bogdanm 0:9b334a45a8ff 98 */
bogdanm 0:9b334a45a8ff 99
bogdanm 0:9b334a45a8ff 100 /* Private macro -------------------------------------------------------------*/
bogdanm 0:9b334a45a8ff 101 /* Private variables ---------------------------------------------------------*/
bogdanm 0:9b334a45a8ff 102 /* Private function prototypes -----------------------------------------------*/
bogdanm 0:9b334a45a8ff 103 /** @defgroup CEC_Private_Functions CEC Private Functions
bogdanm 0:9b334a45a8ff 104 * @{
bogdanm 0:9b334a45a8ff 105 */
bogdanm 0:9b334a45a8ff 106 static HAL_StatusTypeDef CEC_Transmit_IT(CEC_HandleTypeDef *hcec);
bogdanm 0:9b334a45a8ff 107 static HAL_StatusTypeDef CEC_Receive_IT(CEC_HandleTypeDef *hcec);
bogdanm 0:9b334a45a8ff 108 /**
bogdanm 0:9b334a45a8ff 109 * @}
bogdanm 0:9b334a45a8ff 110 */
bogdanm 0:9b334a45a8ff 111
bogdanm 0:9b334a45a8ff 112 /* Exported functions ---------------------------------------------------------*/
bogdanm 0:9b334a45a8ff 113
bogdanm 0:9b334a45a8ff 114 /** @defgroup CEC_Exported_Functions CEC Exported Functions
bogdanm 0:9b334a45a8ff 115 * @{
bogdanm 0:9b334a45a8ff 116 */
bogdanm 0:9b334a45a8ff 117
bogdanm 0:9b334a45a8ff 118 /** @defgroup CEC_Exported_Functions_Group1 Initialization and de-initialization functions
bogdanm 0:9b334a45a8ff 119 * @brief Initialization and Configuration functions
bogdanm 0:9b334a45a8ff 120 *
bogdanm 0:9b334a45a8ff 121 @verbatim
bogdanm 0:9b334a45a8ff 122 ===============================================================================
bogdanm 0:9b334a45a8ff 123 ##### Initialization and Configuration functions #####
bogdanm 0:9b334a45a8ff 124 ===============================================================================
bogdanm 0:9b334a45a8ff 125 [..]
bogdanm 0:9b334a45a8ff 126 This subsection provides a set of functions allowing to initialize the CEC
bogdanm 0:9b334a45a8ff 127 (+) The following parameters need to be configured:
bogdanm 0:9b334a45a8ff 128 (++) TimingErrorFree
bogdanm 0:9b334a45a8ff 129 (++) PeriodErrorFree
bogdanm 0:9b334a45a8ff 130 (++) InitiatorAddress
bogdanm 0:9b334a45a8ff 131
bogdanm 0:9b334a45a8ff 132 @endverbatim
bogdanm 0:9b334a45a8ff 133 * @{
bogdanm 0:9b334a45a8ff 134 */
bogdanm 0:9b334a45a8ff 135
bogdanm 0:9b334a45a8ff 136 /**
bogdanm 0:9b334a45a8ff 137 * @brief Initializes the CEC mode according to the specified
bogdanm 0:9b334a45a8ff 138 * parameters in the CEC_InitTypeDef and creates the associated handle .
bogdanm 0:9b334a45a8ff 139 * @param hcec: CEC handle
bogdanm 0:9b334a45a8ff 140 * @retval HAL status
bogdanm 0:9b334a45a8ff 141 */
bogdanm 0:9b334a45a8ff 142 HAL_StatusTypeDef HAL_CEC_Init(CEC_HandleTypeDef *hcec)
bogdanm 0:9b334a45a8ff 143 {
bogdanm 0:9b334a45a8ff 144 /* Check the CEC handle allocation */
bogdanm 0:9b334a45a8ff 145 if(hcec == NULL)
bogdanm 0:9b334a45a8ff 146 {
bogdanm 0:9b334a45a8ff 147 return HAL_ERROR;
bogdanm 0:9b334a45a8ff 148 }
bogdanm 0:9b334a45a8ff 149
bogdanm 0:9b334a45a8ff 150 /* Check the parameters */
bogdanm 0:9b334a45a8ff 151 assert_param(IS_CEC_ALL_INSTANCE(hcec->Instance));
bogdanm 0:9b334a45a8ff 152 assert_param(IS_CEC_BIT_TIMING_ERROR_MODE(hcec->Init.TimingErrorFree));
bogdanm 0:9b334a45a8ff 153 assert_param(IS_CEC_BIT_PERIOD_ERROR_MODE(hcec->Init.PeriodErrorFree));
bogdanm 0:9b334a45a8ff 154 assert_param(IS_CEC_ADDRESS(hcec->Init.InitiatorAddress));
bogdanm 0:9b334a45a8ff 155
bogdanm 0:9b334a45a8ff 156 if(hcec->State == HAL_CEC_STATE_RESET)
bogdanm 0:9b334a45a8ff 157 {
bogdanm 0:9b334a45a8ff 158 /* Allocate lock resource and initialize it */
mbed_official 124:6a4a5b7d7324 159 hcec->Lock = HAL_UNLOCKED;
bogdanm 0:9b334a45a8ff 160 /* Init the low level hardware : GPIO, CLOCK */
bogdanm 0:9b334a45a8ff 161 HAL_CEC_MspInit(hcec);
bogdanm 0:9b334a45a8ff 162 }
bogdanm 0:9b334a45a8ff 163
bogdanm 0:9b334a45a8ff 164 hcec->State = HAL_CEC_STATE_BUSY;
bogdanm 0:9b334a45a8ff 165
bogdanm 0:9b334a45a8ff 166 /* Disable the Peripheral */
bogdanm 0:9b334a45a8ff 167 __HAL_CEC_DISABLE(hcec);
bogdanm 0:9b334a45a8ff 168
bogdanm 0:9b334a45a8ff 169 /* Write to CEC Control Register */
bogdanm 0:9b334a45a8ff 170 MODIFY_REG(hcec->Instance->CFGR, CEC_CFGR_FIELDS, hcec->Init.TimingErrorFree|hcec->Init.PeriodErrorFree);
bogdanm 0:9b334a45a8ff 171
bogdanm 0:9b334a45a8ff 172 /* Write to CEC Own Address Register */
bogdanm 0:9b334a45a8ff 173 MODIFY_REG(hcec->Instance->OAR, CEC_OAR_OA, hcec->Init.InitiatorAddress);
bogdanm 0:9b334a45a8ff 174
bogdanm 0:9b334a45a8ff 175 /* Configure the prescaler to generate the required 50 microseconds time base.*/
bogdanm 0:9b334a45a8ff 176 MODIFY_REG(hcec->Instance->PRES, CEC_PRES_PRES, 50*(HAL_RCC_GetPCLK1Freq()/1000000)-1);
bogdanm 0:9b334a45a8ff 177
bogdanm 0:9b334a45a8ff 178 /* Enable the Peripheral */
bogdanm 0:9b334a45a8ff 179 __HAL_CEC_ENABLE(hcec);
bogdanm 0:9b334a45a8ff 180
bogdanm 0:9b334a45a8ff 181 hcec->State = HAL_CEC_STATE_READY;
bogdanm 0:9b334a45a8ff 182
bogdanm 0:9b334a45a8ff 183 return HAL_OK;
bogdanm 0:9b334a45a8ff 184 }
bogdanm 0:9b334a45a8ff 185
bogdanm 0:9b334a45a8ff 186
bogdanm 0:9b334a45a8ff 187
bogdanm 0:9b334a45a8ff 188 /**
bogdanm 0:9b334a45a8ff 189 * @brief DeInitializes the CEC peripheral
bogdanm 0:9b334a45a8ff 190 * @param hcec: CEC handle
bogdanm 0:9b334a45a8ff 191 * @retval HAL status
bogdanm 0:9b334a45a8ff 192 */
bogdanm 0:9b334a45a8ff 193 HAL_StatusTypeDef HAL_CEC_DeInit(CEC_HandleTypeDef *hcec)
bogdanm 0:9b334a45a8ff 194 {
bogdanm 0:9b334a45a8ff 195 /* Check the CEC handle allocation */
bogdanm 0:9b334a45a8ff 196 if(hcec == NULL)
bogdanm 0:9b334a45a8ff 197 {
bogdanm 0:9b334a45a8ff 198 return HAL_ERROR;
bogdanm 0:9b334a45a8ff 199 }
bogdanm 0:9b334a45a8ff 200
bogdanm 0:9b334a45a8ff 201 /* Check the parameters */
bogdanm 0:9b334a45a8ff 202 assert_param(IS_CEC_ALL_INSTANCE(hcec->Instance));
bogdanm 0:9b334a45a8ff 203
bogdanm 0:9b334a45a8ff 204 hcec->State = HAL_CEC_STATE_BUSY;
bogdanm 0:9b334a45a8ff 205
bogdanm 0:9b334a45a8ff 206 /* Set peripheral to reset state */
bogdanm 0:9b334a45a8ff 207 hcec->Instance->CFGR = 0x0;
bogdanm 0:9b334a45a8ff 208 hcec->Instance->OAR = 0x0;
bogdanm 0:9b334a45a8ff 209 hcec->Instance->PRES = 0x0;
bogdanm 0:9b334a45a8ff 210 hcec->Instance->CFGR = 0x0;
bogdanm 0:9b334a45a8ff 211 hcec->Instance->ESR = 0x0;
bogdanm 0:9b334a45a8ff 212 hcec->Instance->CSR = 0x0;
bogdanm 0:9b334a45a8ff 213 hcec->Instance->TXD = 0x0;
bogdanm 0:9b334a45a8ff 214 hcec->Instance->RXD = 0x0;
bogdanm 0:9b334a45a8ff 215
bogdanm 0:9b334a45a8ff 216 /* Disable the Peripheral */
bogdanm 0:9b334a45a8ff 217 __HAL_CEC_DISABLE(hcec);
bogdanm 0:9b334a45a8ff 218
bogdanm 0:9b334a45a8ff 219 /* DeInit the low level hardware */
bogdanm 0:9b334a45a8ff 220 HAL_CEC_MspDeInit(hcec);
bogdanm 0:9b334a45a8ff 221
bogdanm 0:9b334a45a8ff 222 hcec->ErrorCode = HAL_CEC_ERROR_NONE;
bogdanm 0:9b334a45a8ff 223 hcec->State = HAL_CEC_STATE_RESET;
bogdanm 0:9b334a45a8ff 224
bogdanm 0:9b334a45a8ff 225 /* Process Unlock */
bogdanm 0:9b334a45a8ff 226 __HAL_UNLOCK(hcec);
bogdanm 0:9b334a45a8ff 227
bogdanm 0:9b334a45a8ff 228 return HAL_OK;
bogdanm 0:9b334a45a8ff 229 }
bogdanm 0:9b334a45a8ff 230
bogdanm 0:9b334a45a8ff 231 /**
bogdanm 0:9b334a45a8ff 232 * @brief CEC MSP Init
bogdanm 0:9b334a45a8ff 233 * @param hcec: CEC handle
bogdanm 0:9b334a45a8ff 234 * @retval None
bogdanm 0:9b334a45a8ff 235 */
bogdanm 0:9b334a45a8ff 236 __weak void HAL_CEC_MspInit(CEC_HandleTypeDef *hcec)
bogdanm 0:9b334a45a8ff 237 {
mbed_official 124:6a4a5b7d7324 238 /* Prevent unused argument(s) compilation warning */
mbed_official 124:6a4a5b7d7324 239 UNUSED(hcec);
bogdanm 0:9b334a45a8ff 240 /* NOTE : This function should not be modified, when the callback is needed,
bogdanm 0:9b334a45a8ff 241 the HAL_CEC_MspInit can be implemented in the user file
bogdanm 0:9b334a45a8ff 242 */
bogdanm 0:9b334a45a8ff 243 }
bogdanm 0:9b334a45a8ff 244
bogdanm 0:9b334a45a8ff 245 /**
bogdanm 0:9b334a45a8ff 246 * @brief CEC MSP DeInit
bogdanm 0:9b334a45a8ff 247 * @param hcec: CEC handle
bogdanm 0:9b334a45a8ff 248 * @retval None
bogdanm 0:9b334a45a8ff 249 */
bogdanm 0:9b334a45a8ff 250 __weak void HAL_CEC_MspDeInit(CEC_HandleTypeDef *hcec)
bogdanm 0:9b334a45a8ff 251 {
mbed_official 124:6a4a5b7d7324 252 /* Prevent unused argument(s) compilation warning */
mbed_official 124:6a4a5b7d7324 253 UNUSED(hcec);
bogdanm 0:9b334a45a8ff 254 /* NOTE : This function should not be modified, when the callback is needed,
bogdanm 0:9b334a45a8ff 255 the HAL_CEC_MspDeInit can be implemented in the user file
bogdanm 0:9b334a45a8ff 256 */
bogdanm 0:9b334a45a8ff 257 }
bogdanm 0:9b334a45a8ff 258
bogdanm 0:9b334a45a8ff 259 /**
bogdanm 0:9b334a45a8ff 260 * @}
bogdanm 0:9b334a45a8ff 261 */
bogdanm 0:9b334a45a8ff 262
bogdanm 0:9b334a45a8ff 263 /** @defgroup CEC_Exported_Functions_Group2 Input and Output operation functions
bogdanm 0:9b334a45a8ff 264 * @brief CEC Transmit/Receive functions
bogdanm 0:9b334a45a8ff 265 *
bogdanm 0:9b334a45a8ff 266 @verbatim
bogdanm 0:9b334a45a8ff 267 ===============================================================================
bogdanm 0:9b334a45a8ff 268 ##### IO operation functions #####
bogdanm 0:9b334a45a8ff 269 ===============================================================================
bogdanm 0:9b334a45a8ff 270 [..]
bogdanm 0:9b334a45a8ff 271 This subsection provides a set of functions allowing to manage the CEC data transfers.
bogdanm 0:9b334a45a8ff 272
bogdanm 0:9b334a45a8ff 273 (#) There are two modes of transfer:
bogdanm 0:9b334a45a8ff 274 (##) Blocking mode: The communication is performed in polling mode.
bogdanm 0:9b334a45a8ff 275 The HAL status of all data processing is returned by the same function
bogdanm 0:9b334a45a8ff 276 after finishing transfer.
bogdanm 0:9b334a45a8ff 277 (##) No-Blocking mode: The communication is performed using Interrupts.
bogdanm 0:9b334a45a8ff 278 These API's return the HAL status.
bogdanm 0:9b334a45a8ff 279 The end of the data processing will be indicated through the
bogdanm 0:9b334a45a8ff 280 dedicated CEC IRQ when using Interrupt mode.
bogdanm 0:9b334a45a8ff 281 The HAL_CEC_TxCpltCallback(), HAL_CEC_RxCpltCallback() user callbacks
bogdanm 0:9b334a45a8ff 282 will be executed respectivelly at the end of the Transmit or Receive process.
bogdanm 0:9b334a45a8ff 283 The HAL_CEC_ErrorCallback()user callback will be executed when a communication
bogdanm 0:9b334a45a8ff 284 error is detected
bogdanm 0:9b334a45a8ff 285 (#) Blocking mode API's are :
bogdanm 0:9b334a45a8ff 286 (##) HAL_CEC_Transmit()
bogdanm 0:9b334a45a8ff 287 (##) HAL_CEC_Receive()
bogdanm 0:9b334a45a8ff 288 (#) Non-Blocking mode API's with Interrupt are :
bogdanm 0:9b334a45a8ff 289 (##) HAL_CEC_Transmit_IT()
bogdanm 0:9b334a45a8ff 290 (##) HAL_CEC_Receive_IT()
bogdanm 0:9b334a45a8ff 291 (##) HAL_CEC_IRQHandler()
bogdanm 0:9b334a45a8ff 292 (#) A set of Transfer Complete Callbacks are provided in No_Blocking mode:
bogdanm 0:9b334a45a8ff 293 (##) HAL_CEC_TxCpltCallback()
bogdanm 0:9b334a45a8ff 294 (##) HAL_CEC_RxCpltCallback()
bogdanm 0:9b334a45a8ff 295 (##) HAL_CEC_ErrorCallback()
bogdanm 0:9b334a45a8ff 296
bogdanm 0:9b334a45a8ff 297 @endverbatim
bogdanm 0:9b334a45a8ff 298 * @{
bogdanm 0:9b334a45a8ff 299 */
bogdanm 0:9b334a45a8ff 300
bogdanm 0:9b334a45a8ff 301 /**
bogdanm 0:9b334a45a8ff 302 * @brief Send data in blocking mode
bogdanm 0:9b334a45a8ff 303 * @param hcec: CEC handle
bogdanm 0:9b334a45a8ff 304 * @param DestinationAddress: destination logical address
bogdanm 0:9b334a45a8ff 305 * @param pData: pointer to input byte data buffer
bogdanm 0:9b334a45a8ff 306 * @param Size: amount of data to be sent in bytes (without counting the header).
bogdanm 0:9b334a45a8ff 307 * 0 means only the header is sent (ping operation).
bogdanm 0:9b334a45a8ff 308 * Maximum TX size is 15 bytes (1 opcode and up to 14 operands).
bogdanm 0:9b334a45a8ff 309 * @param Timeout: Timeout duration.
bogdanm 0:9b334a45a8ff 310 * @retval HAL status
bogdanm 0:9b334a45a8ff 311 */
bogdanm 0:9b334a45a8ff 312 HAL_StatusTypeDef HAL_CEC_Transmit(CEC_HandleTypeDef *hcec, uint8_t DestinationAddress, uint8_t *pData, uint32_t Size, uint32_t Timeout)
bogdanm 0:9b334a45a8ff 313 {
bogdanm 0:9b334a45a8ff 314 uint8_t temp = 0;
bogdanm 0:9b334a45a8ff 315 uint32_t tickstart = 0;
bogdanm 0:9b334a45a8ff 316
bogdanm 0:9b334a45a8ff 317 /* If the IP is ready */
bogdanm 0:9b334a45a8ff 318 if((hcec->State == HAL_CEC_STATE_READY)
bogdanm 0:9b334a45a8ff 319 && (__HAL_CEC_GET_TRANSMISSION_START_FLAG(hcec) == RESET))
bogdanm 0:9b334a45a8ff 320 {
bogdanm 0:9b334a45a8ff 321 /* Basic check on pData pointer */
bogdanm 0:9b334a45a8ff 322 if(((pData == NULL) && (Size > 0)) || (! IS_CEC_MSGSIZE(Size)))
bogdanm 0:9b334a45a8ff 323 {
bogdanm 0:9b334a45a8ff 324 return HAL_ERROR;
bogdanm 0:9b334a45a8ff 325 }
bogdanm 0:9b334a45a8ff 326
bogdanm 0:9b334a45a8ff 327 assert_param(IS_CEC_ADDRESS(DestinationAddress));
bogdanm 0:9b334a45a8ff 328
bogdanm 0:9b334a45a8ff 329 /* Process Locked */
bogdanm 0:9b334a45a8ff 330 __HAL_LOCK(hcec);
bogdanm 0:9b334a45a8ff 331
bogdanm 0:9b334a45a8ff 332 /* Enter the transmit mode */
bogdanm 0:9b334a45a8ff 333 hcec->State = HAL_CEC_STATE_BUSY_TX;
bogdanm 0:9b334a45a8ff 334 hcec->ErrorCode = HAL_CEC_ERROR_NONE;
bogdanm 0:9b334a45a8ff 335
bogdanm 0:9b334a45a8ff 336 /* Initialize the number of bytes to send,
bogdanm 0:9b334a45a8ff 337 * 0 means only one header is sent (ping operation) */
bogdanm 0:9b334a45a8ff 338 hcec->TxXferCount = Size;
bogdanm 0:9b334a45a8ff 339
bogdanm 0:9b334a45a8ff 340 /* Send header block */
bogdanm 0:9b334a45a8ff 341 temp = (uint8_t)((uint32_t)(hcec->Init.InitiatorAddress) << CEC_INITIATOR_LSB_POS) | DestinationAddress;
bogdanm 0:9b334a45a8ff 342 hcec->Instance->TXD = temp;
bogdanm 0:9b334a45a8ff 343
bogdanm 0:9b334a45a8ff 344 /* In case no data to be sent, sender is only pinging the system */
bogdanm 0:9b334a45a8ff 345 if (Size != 0)
bogdanm 0:9b334a45a8ff 346 {
bogdanm 0:9b334a45a8ff 347 /* Set TX Start of Message (TXSOM) bit */
bogdanm 0:9b334a45a8ff 348 hcec->Instance->CSR = CEC_FLAG_TSOM;
bogdanm 0:9b334a45a8ff 349 }
bogdanm 0:9b334a45a8ff 350 else
bogdanm 0:9b334a45a8ff 351 {
bogdanm 0:9b334a45a8ff 352 /* Send a ping command */
bogdanm 0:9b334a45a8ff 353 hcec->Instance->CSR = CEC_FLAG_TEOM|CEC_FLAG_TSOM;
bogdanm 0:9b334a45a8ff 354 }
bogdanm 0:9b334a45a8ff 355
bogdanm 0:9b334a45a8ff 356 /* Polling TBTRF bit with timeout handling*/
bogdanm 0:9b334a45a8ff 357 while (hcec->TxXferCount > 0)
bogdanm 0:9b334a45a8ff 358 {
bogdanm 0:9b334a45a8ff 359 /* Decreasing of the number of remaining data to receive */
bogdanm 0:9b334a45a8ff 360 hcec->TxXferCount--;
bogdanm 0:9b334a45a8ff 361
bogdanm 0:9b334a45a8ff 362 /* Timeout handling */
bogdanm 0:9b334a45a8ff 363 tickstart = HAL_GetTick();
bogdanm 0:9b334a45a8ff 364
bogdanm 0:9b334a45a8ff 365 /* Waiting for the next data transmission */
bogdanm 0:9b334a45a8ff 366 while(HAL_IS_BIT_CLR(hcec->Instance->CSR, CEC_FLAG_TBTRF))
bogdanm 0:9b334a45a8ff 367 {
bogdanm 0:9b334a45a8ff 368 /* Timeout handling */
bogdanm 0:9b334a45a8ff 369 if(Timeout != HAL_MAX_DELAY)
bogdanm 0:9b334a45a8ff 370 {
bogdanm 0:9b334a45a8ff 371 if((Timeout == 0) || ((HAL_GetTick()-tickstart) > Timeout))
bogdanm 0:9b334a45a8ff 372 {
bogdanm 0:9b334a45a8ff 373 hcec->State = HAL_CEC_STATE_READY;
bogdanm 0:9b334a45a8ff 374 /* Process Unlocked */
bogdanm 0:9b334a45a8ff 375 __HAL_UNLOCK(hcec);
bogdanm 0:9b334a45a8ff 376 return HAL_TIMEOUT;
bogdanm 0:9b334a45a8ff 377 }
bogdanm 0:9b334a45a8ff 378 }
bogdanm 0:9b334a45a8ff 379
bogdanm 0:9b334a45a8ff 380 /* Check if an error occured */
bogdanm 0:9b334a45a8ff 381 if(HAL_IS_BIT_SET(hcec->Instance->CSR, CEC_FLAG_TERR) || HAL_IS_BIT_SET(hcec->Instance->CSR, CEC_FLAG_RERR))
bogdanm 0:9b334a45a8ff 382 {
bogdanm 0:9b334a45a8ff 383 /* Copy ESR for error handling purposes */
bogdanm 0:9b334a45a8ff 384 hcec->ErrorCode = READ_BIT(hcec->Instance->ESR, CEC_ESR_ALL_ERROR);
bogdanm 0:9b334a45a8ff 385
bogdanm 0:9b334a45a8ff 386 /* Acknowledgement of the error */
bogdanm 0:9b334a45a8ff 387 __HAL_CEC_CLEAR_FLAG(hcec, CEC_FLAG_TERR);
bogdanm 0:9b334a45a8ff 388 __HAL_CEC_CLEAR_FLAG(hcec, CEC_FLAG_RERR);
bogdanm 0:9b334a45a8ff 389
bogdanm 0:9b334a45a8ff 390 hcec->State = HAL_CEC_STATE_READY;
bogdanm 0:9b334a45a8ff 391 __HAL_UNLOCK(hcec);
bogdanm 0:9b334a45a8ff 392 return HAL_ERROR;
bogdanm 0:9b334a45a8ff 393 }
bogdanm 0:9b334a45a8ff 394 }
bogdanm 0:9b334a45a8ff 395
bogdanm 0:9b334a45a8ff 396 /* Write the next data to TX buffer */
bogdanm 0:9b334a45a8ff 397 hcec->Instance->TXD = *pData++;
bogdanm 0:9b334a45a8ff 398
bogdanm 0:9b334a45a8ff 399 /* If this is the last byte of the ongoing transmission */
bogdanm 0:9b334a45a8ff 400 if (hcec->TxXferCount == 0)
bogdanm 0:9b334a45a8ff 401 {
bogdanm 0:9b334a45a8ff 402 /* Acknowledge byte request and signal end of message */
bogdanm 0:9b334a45a8ff 403 MODIFY_REG(hcec->Instance->CSR, CEC_FLAG_TRANSMIT_MASK, CEC_FLAG_TEOM);
bogdanm 0:9b334a45a8ff 404 }
bogdanm 0:9b334a45a8ff 405 else
bogdanm 0:9b334a45a8ff 406 {
bogdanm 0:9b334a45a8ff 407 /* Acknowledge byte request by writing 0x00 */
bogdanm 0:9b334a45a8ff 408 MODIFY_REG(hcec->Instance->CSR, CEC_FLAG_TRANSMIT_MASK, 0x00);
bogdanm 0:9b334a45a8ff 409 }
bogdanm 0:9b334a45a8ff 410 }
bogdanm 0:9b334a45a8ff 411
bogdanm 0:9b334a45a8ff 412 /* Timeout handling */
bogdanm 0:9b334a45a8ff 413 tickstart = HAL_GetTick();
bogdanm 0:9b334a45a8ff 414
bogdanm 0:9b334a45a8ff 415 /* Wait for message transmission completion (TBTRF is set) */
bogdanm 0:9b334a45a8ff 416 while (HAL_IS_BIT_CLR(hcec->Instance->CSR, CEC_FLAG_TBTRF))
bogdanm 0:9b334a45a8ff 417 {
bogdanm 0:9b334a45a8ff 418 /* Timeout handling */
bogdanm 0:9b334a45a8ff 419 if(Timeout != HAL_MAX_DELAY)
bogdanm 0:9b334a45a8ff 420 {
bogdanm 0:9b334a45a8ff 421 if((Timeout == 0) || ((HAL_GetTick()-tickstart) > Timeout))
bogdanm 0:9b334a45a8ff 422 {
bogdanm 0:9b334a45a8ff 423 hcec->State = HAL_CEC_STATE_READY;
bogdanm 0:9b334a45a8ff 424 __HAL_UNLOCK(hcec);
bogdanm 0:9b334a45a8ff 425 return HAL_TIMEOUT;
bogdanm 0:9b334a45a8ff 426 }
bogdanm 0:9b334a45a8ff 427 }
bogdanm 0:9b334a45a8ff 428
bogdanm 0:9b334a45a8ff 429 /* Check of error during transmission of the last byte */
bogdanm 0:9b334a45a8ff 430 if(HAL_IS_BIT_SET(hcec->Instance->CSR, CEC_FLAG_TERR) || HAL_IS_BIT_SET(hcec->Instance->CSR, CEC_FLAG_RERR))
bogdanm 0:9b334a45a8ff 431 {
bogdanm 0:9b334a45a8ff 432 /* Copy ESR for error handling purposes */
bogdanm 0:9b334a45a8ff 433 hcec->ErrorCode = READ_BIT(hcec->Instance->ESR, CEC_ESR_ALL_ERROR);
bogdanm 0:9b334a45a8ff 434
bogdanm 0:9b334a45a8ff 435 /* Acknowledgement of the error */
bogdanm 0:9b334a45a8ff 436 __HAL_CEC_CLEAR_FLAG(hcec, CEC_FLAG_TERR);
bogdanm 0:9b334a45a8ff 437 __HAL_CEC_CLEAR_FLAG(hcec, CEC_FLAG_RERR);
bogdanm 0:9b334a45a8ff 438
bogdanm 0:9b334a45a8ff 439 hcec->State = HAL_CEC_STATE_READY;
bogdanm 0:9b334a45a8ff 440 __HAL_UNLOCK(hcec);
bogdanm 0:9b334a45a8ff 441 return HAL_ERROR;
bogdanm 0:9b334a45a8ff 442 }
bogdanm 0:9b334a45a8ff 443 }
bogdanm 0:9b334a45a8ff 444
bogdanm 0:9b334a45a8ff 445 /* Check of error after the last byte transmission */
bogdanm 0:9b334a45a8ff 446 if(HAL_IS_BIT_SET(hcec->Instance->CSR, CEC_FLAG_TERR) || HAL_IS_BIT_SET(hcec->Instance->CSR, CEC_FLAG_RERR))
bogdanm 0:9b334a45a8ff 447 {
bogdanm 0:9b334a45a8ff 448 /* Copy ESR for error handling purposes */
bogdanm 0:9b334a45a8ff 449 hcec->ErrorCode = READ_BIT(hcec->Instance->ESR, CEC_ESR_ALL_ERROR);
bogdanm 0:9b334a45a8ff 450
bogdanm 0:9b334a45a8ff 451 /* Acknowledgement of the error */
bogdanm 0:9b334a45a8ff 452 __HAL_CEC_CLEAR_FLAG(hcec, CEC_FLAG_TERR);
bogdanm 0:9b334a45a8ff 453 __HAL_CEC_CLEAR_FLAG(hcec, CEC_FLAG_RERR);
bogdanm 0:9b334a45a8ff 454
bogdanm 0:9b334a45a8ff 455 hcec->State = HAL_CEC_STATE_READY;
bogdanm 0:9b334a45a8ff 456 __HAL_UNLOCK(hcec);
bogdanm 0:9b334a45a8ff 457 return HAL_ERROR;
bogdanm 0:9b334a45a8ff 458 }
bogdanm 0:9b334a45a8ff 459
bogdanm 0:9b334a45a8ff 460 /* Acknowledge successful completion by writing 0x00 */
bogdanm 0:9b334a45a8ff 461 MODIFY_REG(hcec->Instance->CSR, CEC_FLAG_TRANSMIT_MASK, 0x00);
bogdanm 0:9b334a45a8ff 462
bogdanm 0:9b334a45a8ff 463 hcec->State = HAL_CEC_STATE_READY;
bogdanm 0:9b334a45a8ff 464 __HAL_UNLOCK(hcec);
bogdanm 0:9b334a45a8ff 465
bogdanm 0:9b334a45a8ff 466 return HAL_OK;
bogdanm 0:9b334a45a8ff 467 }
bogdanm 0:9b334a45a8ff 468 else
bogdanm 0:9b334a45a8ff 469 {
bogdanm 0:9b334a45a8ff 470 return HAL_BUSY;
bogdanm 0:9b334a45a8ff 471 }
bogdanm 0:9b334a45a8ff 472 }
bogdanm 0:9b334a45a8ff 473
bogdanm 0:9b334a45a8ff 474 /**
bogdanm 0:9b334a45a8ff 475 * @brief Receive data in blocking mode.
bogdanm 0:9b334a45a8ff 476 * @param hcec: CEC handle
bogdanm 0:9b334a45a8ff 477 * @param pData: pointer to received data buffer.
bogdanm 0:9b334a45a8ff 478 * @param Timeout: Timeout duration.
bogdanm 0:9b334a45a8ff 479 * @note The received data size is not known beforehand, the latter is known
bogdanm 0:9b334a45a8ff 480 * when the reception is complete and is stored in hcec->RxXferSize.
bogdanm 0:9b334a45a8ff 481 * hcec->RxXferSize is the sum of opcodes + operands (0 to 14 operands max).
bogdanm 0:9b334a45a8ff 482 * If only a header is received, hcec->RxXferSize = 0
bogdanm 0:9b334a45a8ff 483 * @retval HAL status
bogdanm 0:9b334a45a8ff 484 */
bogdanm 0:9b334a45a8ff 485 HAL_StatusTypeDef HAL_CEC_Receive(CEC_HandleTypeDef *hcec, uint8_t *pData, uint32_t Timeout)
bogdanm 0:9b334a45a8ff 486 {
bogdanm 0:9b334a45a8ff 487 uint32_t temp = 0;
bogdanm 0:9b334a45a8ff 488 uint32_t tickstart = 0;
bogdanm 0:9b334a45a8ff 489
bogdanm 0:9b334a45a8ff 490 if(hcec->State == HAL_CEC_STATE_READY)
bogdanm 0:9b334a45a8ff 491 {
bogdanm 0:9b334a45a8ff 492 if(pData == NULL)
bogdanm 0:9b334a45a8ff 493 {
bogdanm 0:9b334a45a8ff 494 return HAL_ERROR;
bogdanm 0:9b334a45a8ff 495 }
bogdanm 0:9b334a45a8ff 496
bogdanm 0:9b334a45a8ff 497 /* When a ping is received, RxXferSize is 0*/
bogdanm 0:9b334a45a8ff 498 /* When a message is received, RxXferSize contains the number of received bytes */
bogdanm 0:9b334a45a8ff 499 hcec->RxXferSize = CEC_RXXFERSIZE_INITIALIZE;
bogdanm 0:9b334a45a8ff 500
bogdanm 0:9b334a45a8ff 501 /* Process Locked */
bogdanm 0:9b334a45a8ff 502 __HAL_LOCK(hcec);
bogdanm 0:9b334a45a8ff 503
bogdanm 0:9b334a45a8ff 504 hcec->ErrorCode = HAL_CEC_ERROR_NONE;
bogdanm 0:9b334a45a8ff 505
bogdanm 0:9b334a45a8ff 506 /* Continue the reception until the End Of Message is received (CEC_FLAG_REOM) */
bogdanm 0:9b334a45a8ff 507 do
bogdanm 0:9b334a45a8ff 508 {
bogdanm 0:9b334a45a8ff 509 /* Timeout handling */
bogdanm 0:9b334a45a8ff 510 tickstart = HAL_GetTick();
bogdanm 0:9b334a45a8ff 511
bogdanm 0:9b334a45a8ff 512 /* Wait for next byte to be received */
bogdanm 0:9b334a45a8ff 513 while (HAL_IS_BIT_CLR(hcec->Instance->CSR, CEC_FLAG_RBTF))
bogdanm 0:9b334a45a8ff 514 {
bogdanm 0:9b334a45a8ff 515 /* Timeout handling */
bogdanm 0:9b334a45a8ff 516 if(Timeout != HAL_MAX_DELAY)
bogdanm 0:9b334a45a8ff 517 {
bogdanm 0:9b334a45a8ff 518 if((Timeout == 0) || ((HAL_GetTick()-tickstart) > Timeout))
bogdanm 0:9b334a45a8ff 519 {
bogdanm 0:9b334a45a8ff 520 hcec->State = HAL_CEC_STATE_READY;
bogdanm 0:9b334a45a8ff 521 __HAL_UNLOCK(hcec);
bogdanm 0:9b334a45a8ff 522 return HAL_TIMEOUT;
bogdanm 0:9b334a45a8ff 523 }
bogdanm 0:9b334a45a8ff 524 }
bogdanm 0:9b334a45a8ff 525
bogdanm 0:9b334a45a8ff 526 /* Check if an error occured during the reception */
bogdanm 0:9b334a45a8ff 527 if(HAL_IS_BIT_SET(hcec->Instance->CSR, CEC_FLAG_RERR))
bogdanm 0:9b334a45a8ff 528 {
bogdanm 0:9b334a45a8ff 529 /* Copy ESR for error handling purposes */
bogdanm 0:9b334a45a8ff 530 hcec->ErrorCode = READ_BIT(hcec->Instance->ESR, CEC_ESR_ALL_ERROR);
bogdanm 0:9b334a45a8ff 531
bogdanm 0:9b334a45a8ff 532 /* Acknowledgement of the error */
bogdanm 0:9b334a45a8ff 533 __HAL_CEC_CLEAR_FLAG(hcec, CEC_FLAG_RERR);
bogdanm 0:9b334a45a8ff 534
bogdanm 0:9b334a45a8ff 535 hcec->State = HAL_CEC_STATE_READY;
bogdanm 0:9b334a45a8ff 536 __HAL_UNLOCK(hcec);
bogdanm 0:9b334a45a8ff 537 return HAL_ERROR;
bogdanm 0:9b334a45a8ff 538 }
bogdanm 0:9b334a45a8ff 539 }
bogdanm 0:9b334a45a8ff 540
bogdanm 0:9b334a45a8ff 541 /* Keep the value of CSR register as the register is cleared during reception process */
bogdanm 0:9b334a45a8ff 542 temp = hcec->Instance->CSR;
bogdanm 0:9b334a45a8ff 543
bogdanm 0:9b334a45a8ff 544 /* Read received data */
bogdanm 0:9b334a45a8ff 545 *pData++ = hcec->Instance->RXD;
bogdanm 0:9b334a45a8ff 546
bogdanm 0:9b334a45a8ff 547 /* Acknowledge received byte by writing 0x00 */
bogdanm 0:9b334a45a8ff 548 CLEAR_BIT(hcec->Instance->CSR, CEC_FLAG_RECEIVE_MASK);
bogdanm 0:9b334a45a8ff 549
bogdanm 0:9b334a45a8ff 550 /* Increment the number of received data */
bogdanm 0:9b334a45a8ff 551 if(hcec->RxXferSize == CEC_RXXFERSIZE_INITIALIZE)
bogdanm 0:9b334a45a8ff 552 {
bogdanm 0:9b334a45a8ff 553 hcec->RxXferSize = 0;
bogdanm 0:9b334a45a8ff 554 }
bogdanm 0:9b334a45a8ff 555 else
bogdanm 0:9b334a45a8ff 556 {
bogdanm 0:9b334a45a8ff 557 hcec->RxXferSize++;
bogdanm 0:9b334a45a8ff 558 }
bogdanm 0:9b334a45a8ff 559
bogdanm 0:9b334a45a8ff 560 }while (HAL_IS_BIT_CLR(temp, CEC_FLAG_REOM));
bogdanm 0:9b334a45a8ff 561
bogdanm 0:9b334a45a8ff 562 hcec->State = HAL_CEC_STATE_READY;
bogdanm 0:9b334a45a8ff 563 __HAL_UNLOCK(hcec);
bogdanm 0:9b334a45a8ff 564
bogdanm 0:9b334a45a8ff 565 if(IS_CEC_MSGSIZE(hcec->RxXferSize))
bogdanm 0:9b334a45a8ff 566 {
bogdanm 0:9b334a45a8ff 567 return HAL_OK;
bogdanm 0:9b334a45a8ff 568 }
bogdanm 0:9b334a45a8ff 569 else
bogdanm 0:9b334a45a8ff 570 {
bogdanm 0:9b334a45a8ff 571 return HAL_ERROR;
bogdanm 0:9b334a45a8ff 572 }
bogdanm 0:9b334a45a8ff 573 }
bogdanm 0:9b334a45a8ff 574 else
bogdanm 0:9b334a45a8ff 575 {
bogdanm 0:9b334a45a8ff 576 return HAL_BUSY;
bogdanm 0:9b334a45a8ff 577 }
bogdanm 0:9b334a45a8ff 578 }
bogdanm 0:9b334a45a8ff 579
bogdanm 0:9b334a45a8ff 580
bogdanm 0:9b334a45a8ff 581 /**
bogdanm 0:9b334a45a8ff 582 * @brief Send data in interrupt mode
bogdanm 0:9b334a45a8ff 583 * @param hcec: CEC handle
bogdanm 0:9b334a45a8ff 584 * @param DestinationAddress: destination logical address
bogdanm 0:9b334a45a8ff 585 * @param pData: pointer to input byte data buffer
bogdanm 0:9b334a45a8ff 586 * @param Size: amount of data to be sent in bytes (without counting the header).
bogdanm 0:9b334a45a8ff 587 * 0 means only the header is sent (ping operation).
bogdanm 0:9b334a45a8ff 588 * Maximum TX size is 15 bytes (1 opcode and up to 14 operands).
bogdanm 0:9b334a45a8ff 589 * @retval HAL status
bogdanm 0:9b334a45a8ff 590 */
bogdanm 0:9b334a45a8ff 591 HAL_StatusTypeDef HAL_CEC_Transmit_IT(CEC_HandleTypeDef *hcec, uint8_t DestinationAddress, uint8_t *pData, uint32_t Size)
bogdanm 0:9b334a45a8ff 592 {
bogdanm 0:9b334a45a8ff 593 uint8_t temp = 0;
bogdanm 0:9b334a45a8ff 594 uint32_t tmp_state = 0;
bogdanm 0:9b334a45a8ff 595
bogdanm 0:9b334a45a8ff 596 tmp_state = hcec->State;
bogdanm 0:9b334a45a8ff 597 if(((tmp_state == HAL_CEC_STATE_READY) || (tmp_state == HAL_CEC_STATE_BUSY_RX))
bogdanm 0:9b334a45a8ff 598 && (__HAL_CEC_GET_TRANSMISSION_START_FLAG(hcec) == RESET))
bogdanm 0:9b334a45a8ff 599 {
bogdanm 0:9b334a45a8ff 600
bogdanm 0:9b334a45a8ff 601 /* Basic check on pData pointer */
bogdanm 0:9b334a45a8ff 602 if(((pData == NULL) && (Size > 0)) || (! IS_CEC_MSGSIZE(Size)))
bogdanm 0:9b334a45a8ff 603 {
bogdanm 0:9b334a45a8ff 604 return HAL_ERROR;
bogdanm 0:9b334a45a8ff 605 }
bogdanm 0:9b334a45a8ff 606
bogdanm 0:9b334a45a8ff 607 assert_param(IS_CEC_ADDRESS(DestinationAddress));
bogdanm 0:9b334a45a8ff 608
bogdanm 0:9b334a45a8ff 609 /* Process Locked */
bogdanm 0:9b334a45a8ff 610 __HAL_LOCK(hcec);
bogdanm 0:9b334a45a8ff 611 hcec->pTxBuffPtr = pData;
bogdanm 0:9b334a45a8ff 612
bogdanm 0:9b334a45a8ff 613 /* Check if a receive process is ongoing or not */
bogdanm 0:9b334a45a8ff 614 if(hcec->State == HAL_CEC_STATE_BUSY_RX)
bogdanm 0:9b334a45a8ff 615 {
bogdanm 0:9b334a45a8ff 616 hcec->State = HAL_CEC_STATE_BUSY_TX_RX;
bogdanm 0:9b334a45a8ff 617
bogdanm 0:9b334a45a8ff 618 /* Interrupt are not enabled here because they are already enabled in the Reception process */
bogdanm 0:9b334a45a8ff 619 }
bogdanm 0:9b334a45a8ff 620 else
bogdanm 0:9b334a45a8ff 621 {
bogdanm 0:9b334a45a8ff 622 hcec->State = HAL_CEC_STATE_BUSY_TX;
bogdanm 0:9b334a45a8ff 623
bogdanm 0:9b334a45a8ff 624 /* Enable the CEC interrupt */
bogdanm 0:9b334a45a8ff 625 __HAL_CEC_ENABLE_IT(hcec, CEC_IT_IE);
bogdanm 0:9b334a45a8ff 626 }
bogdanm 0:9b334a45a8ff 627
bogdanm 0:9b334a45a8ff 628 hcec->ErrorCode = HAL_CEC_ERROR_NONE;
bogdanm 0:9b334a45a8ff 629
bogdanm 0:9b334a45a8ff 630 /* initialize the number of bytes to send,
bogdanm 0:9b334a45a8ff 631 * 0 means only one header is sent (ping operation) */
bogdanm 0:9b334a45a8ff 632 hcec->TxXferCount = Size;
bogdanm 0:9b334a45a8ff 633
bogdanm 0:9b334a45a8ff 634 /* send header block */
bogdanm 0:9b334a45a8ff 635 temp = (uint8_t)((uint32_t)(hcec->Init.InitiatorAddress) << CEC_INITIATOR_LSB_POS) | DestinationAddress;
bogdanm 0:9b334a45a8ff 636 hcec->Instance->TXD = temp;
bogdanm 0:9b334a45a8ff 637
bogdanm 0:9b334a45a8ff 638 /* Process Unlocked */
bogdanm 0:9b334a45a8ff 639 __HAL_UNLOCK(hcec);
bogdanm 0:9b334a45a8ff 640
bogdanm 0:9b334a45a8ff 641 /* case no data to be sent, sender is only pinging the system */
bogdanm 0:9b334a45a8ff 642 if (Size != 0)
bogdanm 0:9b334a45a8ff 643 {
bogdanm 0:9b334a45a8ff 644 /* Set TX Start of Message (TXSOM) bit */
bogdanm 0:9b334a45a8ff 645 MODIFY_REG(hcec->Instance->CSR, CEC_FLAG_TRANSMIT_MASK, CEC_FLAG_TSOM);
bogdanm 0:9b334a45a8ff 646 }
bogdanm 0:9b334a45a8ff 647 else
bogdanm 0:9b334a45a8ff 648 {
bogdanm 0:9b334a45a8ff 649 /* Send a ping command */
bogdanm 0:9b334a45a8ff 650 MODIFY_REG(hcec->Instance->CSR, CEC_FLAG_TRANSMIT_MASK, CEC_FLAG_TEOM|CEC_FLAG_TSOM);
bogdanm 0:9b334a45a8ff 651 }
bogdanm 0:9b334a45a8ff 652 return HAL_OK;
bogdanm 0:9b334a45a8ff 653 }
bogdanm 0:9b334a45a8ff 654 else
bogdanm 0:9b334a45a8ff 655 {
bogdanm 0:9b334a45a8ff 656 return HAL_BUSY;
bogdanm 0:9b334a45a8ff 657 }
bogdanm 0:9b334a45a8ff 658 }
bogdanm 0:9b334a45a8ff 659
bogdanm 0:9b334a45a8ff 660
bogdanm 0:9b334a45a8ff 661 /**
bogdanm 0:9b334a45a8ff 662 * @brief Receive data in interrupt mode.
bogdanm 0:9b334a45a8ff 663 * @param hcec: CEC handle
bogdanm 0:9b334a45a8ff 664 * @param pData: pointer to received data buffer.
bogdanm 0:9b334a45a8ff 665 * @note The received data size is not known beforehand, the latter is known
bogdanm 0:9b334a45a8ff 666 * when the reception is complete and is stored in hcec->RxXferSize.
bogdanm 0:9b334a45a8ff 667 * hcec->RxXferSize is the sum of opcodes + operands (0 to 14 operands max).
bogdanm 0:9b334a45a8ff 668 * If only a header is received, hcec->RxXferSize = 0
bogdanm 0:9b334a45a8ff 669 * @retval HAL status
bogdanm 0:9b334a45a8ff 670 */
bogdanm 0:9b334a45a8ff 671 HAL_StatusTypeDef HAL_CEC_Receive_IT(CEC_HandleTypeDef *hcec, uint8_t *pData)
bogdanm 0:9b334a45a8ff 672 {
bogdanm 0:9b334a45a8ff 673 uint32_t tmp_state = 0;
bogdanm 0:9b334a45a8ff 674 tmp_state = hcec->State;
bogdanm 0:9b334a45a8ff 675 if((tmp_state == HAL_CEC_STATE_READY) || (tmp_state == HAL_CEC_STATE_BUSY_TX))
bogdanm 0:9b334a45a8ff 676 {
bogdanm 0:9b334a45a8ff 677 if(pData == NULL)
bogdanm 0:9b334a45a8ff 678 {
bogdanm 0:9b334a45a8ff 679 return HAL_ERROR;
bogdanm 0:9b334a45a8ff 680 }
bogdanm 0:9b334a45a8ff 681
bogdanm 0:9b334a45a8ff 682 /* When a ping is received, RxXferSize is 0 */
bogdanm 0:9b334a45a8ff 683 /* When a message is received, RxXferSize contains the number of received bytes */
bogdanm 0:9b334a45a8ff 684 hcec->RxXferSize = CEC_RXXFERSIZE_INITIALIZE;
bogdanm 0:9b334a45a8ff 685
bogdanm 0:9b334a45a8ff 686 /* Process Locked */
bogdanm 0:9b334a45a8ff 687 __HAL_LOCK(hcec);
bogdanm 0:9b334a45a8ff 688
bogdanm 0:9b334a45a8ff 689 hcec->pRxBuffPtr = pData;
bogdanm 0:9b334a45a8ff 690 hcec->ErrorCode = HAL_CEC_ERROR_NONE;
bogdanm 0:9b334a45a8ff 691
bogdanm 0:9b334a45a8ff 692 /* Process Unlocked */
bogdanm 0:9b334a45a8ff 693 __HAL_UNLOCK(hcec);
bogdanm 0:9b334a45a8ff 694
bogdanm 0:9b334a45a8ff 695 /* Check if a transmit process is ongoing or not */
bogdanm 0:9b334a45a8ff 696 if(hcec->State == HAL_CEC_STATE_BUSY_TX)
bogdanm 0:9b334a45a8ff 697 {
bogdanm 0:9b334a45a8ff 698 hcec->State = HAL_CEC_STATE_BUSY_TX_RX;
bogdanm 0:9b334a45a8ff 699 }
bogdanm 0:9b334a45a8ff 700 else
bogdanm 0:9b334a45a8ff 701 {
bogdanm 0:9b334a45a8ff 702 hcec->State = HAL_CEC_STATE_BUSY_RX;
bogdanm 0:9b334a45a8ff 703
bogdanm 0:9b334a45a8ff 704 /* Enable CEC interrupt */
bogdanm 0:9b334a45a8ff 705 __HAL_CEC_ENABLE_IT(hcec, CEC_IT_IE);
bogdanm 0:9b334a45a8ff 706 }
bogdanm 0:9b334a45a8ff 707
bogdanm 0:9b334a45a8ff 708 return HAL_OK;
bogdanm 0:9b334a45a8ff 709 }
bogdanm 0:9b334a45a8ff 710 else
bogdanm 0:9b334a45a8ff 711 {
bogdanm 0:9b334a45a8ff 712 return HAL_BUSY;
bogdanm 0:9b334a45a8ff 713 }
bogdanm 0:9b334a45a8ff 714 }
bogdanm 0:9b334a45a8ff 715
bogdanm 0:9b334a45a8ff 716 /**
bogdanm 0:9b334a45a8ff 717 * @brief Get size of the received frame.
bogdanm 0:9b334a45a8ff 718 * @param hcec: CEC handle
bogdanm 0:9b334a45a8ff 719 * @retval Frame size
bogdanm 0:9b334a45a8ff 720 */
bogdanm 0:9b334a45a8ff 721 uint32_t HAL_CEC_GetReceivedFrameSize(CEC_HandleTypeDef *hcec)
bogdanm 0:9b334a45a8ff 722 {
bogdanm 0:9b334a45a8ff 723 return hcec->RxXferSize;
bogdanm 0:9b334a45a8ff 724 }
bogdanm 0:9b334a45a8ff 725
bogdanm 0:9b334a45a8ff 726 /**
bogdanm 0:9b334a45a8ff 727 * @brief This function handles CEC interrupt requests.
bogdanm 0:9b334a45a8ff 728 * @param hcec: CEC handle
bogdanm 0:9b334a45a8ff 729 * @retval None
bogdanm 0:9b334a45a8ff 730 */
bogdanm 0:9b334a45a8ff 731 void HAL_CEC_IRQHandler(CEC_HandleTypeDef *hcec)
bogdanm 0:9b334a45a8ff 732 {
bogdanm 0:9b334a45a8ff 733 /* Save error status register for further error handling purposes */
bogdanm 0:9b334a45a8ff 734 hcec->ErrorCode = READ_BIT(hcec->Instance->ESR, CEC_ESR_ALL_ERROR);
bogdanm 0:9b334a45a8ff 735
bogdanm 0:9b334a45a8ff 736 /* Transmit error */
bogdanm 0:9b334a45a8ff 737 if((__HAL_CEC_GET_FLAG(hcec, CEC_FLAG_TERR) != RESET))
bogdanm 0:9b334a45a8ff 738 {
bogdanm 0:9b334a45a8ff 739 /* Acknowledgement of the error */
bogdanm 0:9b334a45a8ff 740 __HAL_CEC_CLEAR_FLAG(hcec, CEC_FLAG_TERR);
bogdanm 0:9b334a45a8ff 741
bogdanm 0:9b334a45a8ff 742 /* Check if a receive process is ongoing or not */
bogdanm 0:9b334a45a8ff 743 if(hcec->State == HAL_CEC_STATE_BUSY_TX_RX)
bogdanm 0:9b334a45a8ff 744 {
bogdanm 0:9b334a45a8ff 745 /* Interrupts are not disabled due to reception still ongoing */
bogdanm 0:9b334a45a8ff 746
bogdanm 0:9b334a45a8ff 747 hcec->State = HAL_CEC_STATE_BUSY_RX;
bogdanm 0:9b334a45a8ff 748 }
bogdanm 0:9b334a45a8ff 749 else
bogdanm 0:9b334a45a8ff 750 {
bogdanm 0:9b334a45a8ff 751 /* Disable the CEC Transmission Interrupts */
bogdanm 0:9b334a45a8ff 752 __HAL_CEC_DISABLE_IT(hcec, CEC_IT_IE);
bogdanm 0:9b334a45a8ff 753
bogdanm 0:9b334a45a8ff 754 hcec->State = HAL_CEC_STATE_READY;
bogdanm 0:9b334a45a8ff 755 }
bogdanm 0:9b334a45a8ff 756 }
bogdanm 0:9b334a45a8ff 757
bogdanm 0:9b334a45a8ff 758 /* Receive error */
bogdanm 0:9b334a45a8ff 759 if((__HAL_CEC_GET_FLAG(hcec, CEC_FLAG_RERR) != RESET))
bogdanm 0:9b334a45a8ff 760 {
bogdanm 0:9b334a45a8ff 761 /* Acknowledgement of the error */
bogdanm 0:9b334a45a8ff 762 __HAL_CEC_CLEAR_FLAG(hcec, CEC_FLAG_RERR);
bogdanm 0:9b334a45a8ff 763
bogdanm 0:9b334a45a8ff 764 /* Check if a transmit process is ongoing or not */
bogdanm 0:9b334a45a8ff 765 if(hcec->State == HAL_CEC_STATE_BUSY_TX_RX)
bogdanm 0:9b334a45a8ff 766 {
bogdanm 0:9b334a45a8ff 767 /* Interrupts are not disabled due to reception still ongoing */
bogdanm 0:9b334a45a8ff 768
bogdanm 0:9b334a45a8ff 769 hcec->State = HAL_CEC_STATE_BUSY_TX;
bogdanm 0:9b334a45a8ff 770 }
bogdanm 0:9b334a45a8ff 771 else
bogdanm 0:9b334a45a8ff 772 {
bogdanm 0:9b334a45a8ff 773 /* Disable the CEC Transmission Interrupts */
bogdanm 0:9b334a45a8ff 774 __HAL_CEC_DISABLE_IT(hcec, CEC_IT_IE);
bogdanm 0:9b334a45a8ff 775
bogdanm 0:9b334a45a8ff 776 hcec->State = HAL_CEC_STATE_READY;
bogdanm 0:9b334a45a8ff 777 }
bogdanm 0:9b334a45a8ff 778 }
bogdanm 0:9b334a45a8ff 779
bogdanm 0:9b334a45a8ff 780 if ((hcec->ErrorCode & CEC_ESR_ALL_ERROR) != 0)
bogdanm 0:9b334a45a8ff 781 {
bogdanm 0:9b334a45a8ff 782 HAL_CEC_ErrorCallback(hcec);
bogdanm 0:9b334a45a8ff 783 }
bogdanm 0:9b334a45a8ff 784
bogdanm 0:9b334a45a8ff 785 /* Transmit byte request or block transfer finished */
bogdanm 0:9b334a45a8ff 786 if((__HAL_CEC_GET_FLAG(hcec, CEC_FLAG_TBTRF) != RESET))
bogdanm 0:9b334a45a8ff 787 {
bogdanm 0:9b334a45a8ff 788 CEC_Transmit_IT(hcec);
bogdanm 0:9b334a45a8ff 789 }
bogdanm 0:9b334a45a8ff 790
bogdanm 0:9b334a45a8ff 791 /* Receive byte or block transfer finished */
bogdanm 0:9b334a45a8ff 792 if((__HAL_CEC_GET_FLAG(hcec, CEC_FLAG_RBTF) != RESET))
bogdanm 0:9b334a45a8ff 793 {
bogdanm 0:9b334a45a8ff 794 CEC_Receive_IT(hcec);
bogdanm 0:9b334a45a8ff 795 }
bogdanm 0:9b334a45a8ff 796 }
bogdanm 0:9b334a45a8ff 797
bogdanm 0:9b334a45a8ff 798
bogdanm 0:9b334a45a8ff 799 /**
bogdanm 0:9b334a45a8ff 800 * @brief Tx Transfer completed callback
bogdanm 0:9b334a45a8ff 801 * @param hcec: CEC handle
bogdanm 0:9b334a45a8ff 802 * @retval None
bogdanm 0:9b334a45a8ff 803 */
bogdanm 0:9b334a45a8ff 804 __weak void HAL_CEC_TxCpltCallback(CEC_HandleTypeDef *hcec)
bogdanm 0:9b334a45a8ff 805 {
mbed_official 124:6a4a5b7d7324 806 /* Prevent unused argument(s) compilation warning */
mbed_official 124:6a4a5b7d7324 807 UNUSED(hcec);
bogdanm 0:9b334a45a8ff 808 /* NOTE : This function should not be modified, when the callback is needed,
bogdanm 0:9b334a45a8ff 809 the HAL_CEC_TxCpltCallback can be implemented in the user file
bogdanm 0:9b334a45a8ff 810 */
bogdanm 0:9b334a45a8ff 811 }
bogdanm 0:9b334a45a8ff 812
bogdanm 0:9b334a45a8ff 813 /**
bogdanm 0:9b334a45a8ff 814 * @brief Rx Transfer completed callback
bogdanm 0:9b334a45a8ff 815 * @param hcec: CEC handle
bogdanm 0:9b334a45a8ff 816 * @retval None
bogdanm 0:9b334a45a8ff 817 */
bogdanm 0:9b334a45a8ff 818 __weak void HAL_CEC_RxCpltCallback(CEC_HandleTypeDef *hcec)
bogdanm 0:9b334a45a8ff 819 {
mbed_official 124:6a4a5b7d7324 820 /* Prevent unused argument(s) compilation warning */
mbed_official 124:6a4a5b7d7324 821 UNUSED(hcec);
bogdanm 0:9b334a45a8ff 822 /* NOTE : This function should not be modified, when the callback is needed,
bogdanm 0:9b334a45a8ff 823 the HAL_CEC_RxCpltCallback can be implemented in the user file
bogdanm 0:9b334a45a8ff 824 */
bogdanm 0:9b334a45a8ff 825 }
bogdanm 0:9b334a45a8ff 826
bogdanm 0:9b334a45a8ff 827 /**
bogdanm 0:9b334a45a8ff 828 * @brief CEC error callbacks
bogdanm 0:9b334a45a8ff 829 * @param hcec: CEC handle
bogdanm 0:9b334a45a8ff 830 * @retval None
bogdanm 0:9b334a45a8ff 831 */
bogdanm 0:9b334a45a8ff 832 __weak void HAL_CEC_ErrorCallback(CEC_HandleTypeDef *hcec)
bogdanm 0:9b334a45a8ff 833 {
mbed_official 124:6a4a5b7d7324 834 /* Prevent unused argument(s) compilation warning */
mbed_official 124:6a4a5b7d7324 835 UNUSED(hcec);
bogdanm 0:9b334a45a8ff 836 /* NOTE : This function should not be modified, when the callback is needed,
bogdanm 0:9b334a45a8ff 837 the HAL_CEC_ErrorCallback can be implemented in the user file
bogdanm 0:9b334a45a8ff 838 */
bogdanm 0:9b334a45a8ff 839 }
bogdanm 0:9b334a45a8ff 840
bogdanm 0:9b334a45a8ff 841 /**
bogdanm 0:9b334a45a8ff 842 * @}
bogdanm 0:9b334a45a8ff 843 */
bogdanm 0:9b334a45a8ff 844
bogdanm 0:9b334a45a8ff 845 /** @defgroup CEC_Exported_Functions_Group3 Peripheral Control functions
bogdanm 0:9b334a45a8ff 846 * @brief CEC control functions
bogdanm 0:9b334a45a8ff 847 *
bogdanm 0:9b334a45a8ff 848 @verbatim
bogdanm 0:9b334a45a8ff 849 ===============================================================================
bogdanm 0:9b334a45a8ff 850 ##### Peripheral Control functions #####
bogdanm 0:9b334a45a8ff 851 ===============================================================================
bogdanm 0:9b334a45a8ff 852 [..]
bogdanm 0:9b334a45a8ff 853 This subsection provides a set of functions allowing to control the CEC.
bogdanm 0:9b334a45a8ff 854 (+) HAL_CEC_GetState() API can be helpful to check in run-time the state of the CEC peripheral.
bogdanm 0:9b334a45a8ff 855 (+) HAL_CEC_GetError() API can be helpful to get the error code of a failed transmission or reception.
bogdanm 0:9b334a45a8ff 856 @endverbatim
bogdanm 0:9b334a45a8ff 857 * @{
bogdanm 0:9b334a45a8ff 858 */
bogdanm 0:9b334a45a8ff 859
bogdanm 0:9b334a45a8ff 860 /**
bogdanm 0:9b334a45a8ff 861 * @brief return the CEC state
bogdanm 0:9b334a45a8ff 862 * @param hcec: CEC handle
bogdanm 0:9b334a45a8ff 863 * @retval HAL state
bogdanm 0:9b334a45a8ff 864 */
bogdanm 0:9b334a45a8ff 865 HAL_CEC_StateTypeDef HAL_CEC_GetState(CEC_HandleTypeDef *hcec)
bogdanm 0:9b334a45a8ff 866 {
bogdanm 0:9b334a45a8ff 867 return hcec->State;
bogdanm 0:9b334a45a8ff 868 }
bogdanm 0:9b334a45a8ff 869
bogdanm 0:9b334a45a8ff 870 /**
bogdanm 0:9b334a45a8ff 871 * @brief Return the CEC error code
bogdanm 0:9b334a45a8ff 872 * @param hcec : pointer to a CEC_HandleTypeDef structure that contains
bogdanm 0:9b334a45a8ff 873 * the configuration information for the specified CEC.
bogdanm 0:9b334a45a8ff 874 * @retval CEC Error Code
bogdanm 0:9b334a45a8ff 875 */
bogdanm 0:9b334a45a8ff 876 uint32_t HAL_CEC_GetError(CEC_HandleTypeDef *hcec)
bogdanm 0:9b334a45a8ff 877 {
bogdanm 0:9b334a45a8ff 878 return hcec->ErrorCode;
bogdanm 0:9b334a45a8ff 879 }
bogdanm 0:9b334a45a8ff 880
bogdanm 0:9b334a45a8ff 881 /**
bogdanm 0:9b334a45a8ff 882 * @}
bogdanm 0:9b334a45a8ff 883 */
bogdanm 0:9b334a45a8ff 884
bogdanm 0:9b334a45a8ff 885 /**
bogdanm 0:9b334a45a8ff 886 * @}
bogdanm 0:9b334a45a8ff 887 */
bogdanm 0:9b334a45a8ff 888
bogdanm 0:9b334a45a8ff 889 /** @addtogroup CEC_Private_Functions
bogdanm 0:9b334a45a8ff 890 * @{
bogdanm 0:9b334a45a8ff 891 */
bogdanm 0:9b334a45a8ff 892
bogdanm 0:9b334a45a8ff 893 /**
bogdanm 0:9b334a45a8ff 894 * @brief Send data in interrupt mode
bogdanm 0:9b334a45a8ff 895 * @param hcec: CEC handle.
bogdanm 0:9b334a45a8ff 896 * Function called under interruption only, once
bogdanm 0:9b334a45a8ff 897 * interruptions have been enabled by HAL_CEC_Transmit_IT()
bogdanm 0:9b334a45a8ff 898 * @retval HAL status
bogdanm 0:9b334a45a8ff 899 */
bogdanm 0:9b334a45a8ff 900 static HAL_StatusTypeDef CEC_Transmit_IT(CEC_HandleTypeDef *hcec)
bogdanm 0:9b334a45a8ff 901 {
bogdanm 0:9b334a45a8ff 902 uint32_t tmp_state = 0;
bogdanm 0:9b334a45a8ff 903
bogdanm 0:9b334a45a8ff 904 tmp_state = hcec->State;
bogdanm 0:9b334a45a8ff 905 /* if the IP is already busy or if there is a previous transmission
bogdanm 0:9b334a45a8ff 906 already pending due to arbitration loss */
bogdanm 0:9b334a45a8ff 907 if(((tmp_state == HAL_CEC_STATE_BUSY_TX) || (tmp_state == HAL_CEC_STATE_BUSY_TX_RX))
bogdanm 0:9b334a45a8ff 908 || (__HAL_CEC_GET_TRANSMISSION_START_FLAG(hcec) != RESET))
bogdanm 0:9b334a45a8ff 909 {
bogdanm 0:9b334a45a8ff 910 /* if all data have been sent */
bogdanm 0:9b334a45a8ff 911 if(hcec->TxXferCount == 0)
bogdanm 0:9b334a45a8ff 912 {
bogdanm 0:9b334a45a8ff 913 /* Acknowledge successful completion by writing 0x00 */
bogdanm 0:9b334a45a8ff 914 MODIFY_REG(hcec->Instance->CSR, CEC_FLAG_TRANSMIT_MASK, 0x00);
bogdanm 0:9b334a45a8ff 915
bogdanm 0:9b334a45a8ff 916 /* Check if a receive process is ongoing or not */
bogdanm 0:9b334a45a8ff 917 if(hcec->State == HAL_CEC_STATE_BUSY_TX_RX)
bogdanm 0:9b334a45a8ff 918 {
bogdanm 0:9b334a45a8ff 919 /* Interrupts are not disabled due to reception still ongoing */
bogdanm 0:9b334a45a8ff 920
bogdanm 0:9b334a45a8ff 921 hcec->State = HAL_CEC_STATE_BUSY_RX;
bogdanm 0:9b334a45a8ff 922 }
bogdanm 0:9b334a45a8ff 923 else
bogdanm 0:9b334a45a8ff 924 {
bogdanm 0:9b334a45a8ff 925 /* Disable the CEC Transmission Interrupts */
bogdanm 0:9b334a45a8ff 926 __HAL_CEC_DISABLE_IT(hcec, CEC_IT_IE);
bogdanm 0:9b334a45a8ff 927
bogdanm 0:9b334a45a8ff 928 hcec->State = HAL_CEC_STATE_READY;
bogdanm 0:9b334a45a8ff 929 }
bogdanm 0:9b334a45a8ff 930
bogdanm 0:9b334a45a8ff 931 HAL_CEC_TxCpltCallback(hcec);
bogdanm 0:9b334a45a8ff 932
bogdanm 0:9b334a45a8ff 933 return HAL_OK;
bogdanm 0:9b334a45a8ff 934 }
bogdanm 0:9b334a45a8ff 935 else
bogdanm 0:9b334a45a8ff 936 {
bogdanm 0:9b334a45a8ff 937 /* Reduce the number of bytes to transfer by one */
bogdanm 0:9b334a45a8ff 938 hcec->TxXferCount--;
bogdanm 0:9b334a45a8ff 939
bogdanm 0:9b334a45a8ff 940 /* Write data to TX buffer*/
bogdanm 0:9b334a45a8ff 941 hcec->Instance->TXD = *hcec->pTxBuffPtr++;
bogdanm 0:9b334a45a8ff 942
bogdanm 0:9b334a45a8ff 943 /* If this is the last byte of the ongoing transmission */
bogdanm 0:9b334a45a8ff 944 if (hcec->TxXferCount == 0)
bogdanm 0:9b334a45a8ff 945 {
bogdanm 0:9b334a45a8ff 946 /* Acknowledge byte request and signal end of message */
bogdanm 0:9b334a45a8ff 947 MODIFY_REG(hcec->Instance->CSR, CEC_FLAG_TRANSMIT_MASK, CEC_FLAG_TEOM);
bogdanm 0:9b334a45a8ff 948 }
bogdanm 0:9b334a45a8ff 949 else
bogdanm 0:9b334a45a8ff 950 {
bogdanm 0:9b334a45a8ff 951 /* Acknowledge byte request by writing 0x00 */
bogdanm 0:9b334a45a8ff 952 MODIFY_REG(hcec->Instance->CSR, CEC_FLAG_TRANSMIT_MASK, 0x00);
bogdanm 0:9b334a45a8ff 953 }
bogdanm 0:9b334a45a8ff 954
bogdanm 0:9b334a45a8ff 955 return HAL_OK;
bogdanm 0:9b334a45a8ff 956 }
bogdanm 0:9b334a45a8ff 957 }
bogdanm 0:9b334a45a8ff 958 else
bogdanm 0:9b334a45a8ff 959 {
bogdanm 0:9b334a45a8ff 960 return HAL_BUSY;
bogdanm 0:9b334a45a8ff 961 }
bogdanm 0:9b334a45a8ff 962 }
bogdanm 0:9b334a45a8ff 963
bogdanm 0:9b334a45a8ff 964 /**
bogdanm 0:9b334a45a8ff 965 * @brief Receive data in interrupt mode.
bogdanm 0:9b334a45a8ff 966 * @param hcec: CEC handle.
bogdanm 0:9b334a45a8ff 967 * Function called under interruption only, once
bogdanm 0:9b334a45a8ff 968 * interruptions have been enabled by HAL_CEC_Receive_IT()
bogdanm 0:9b334a45a8ff 969 * @retval HAL status
bogdanm 0:9b334a45a8ff 970 */
bogdanm 0:9b334a45a8ff 971 static HAL_StatusTypeDef CEC_Receive_IT(CEC_HandleTypeDef *hcec)
bogdanm 0:9b334a45a8ff 972 {
bogdanm 0:9b334a45a8ff 973 static uint32_t temp;
bogdanm 0:9b334a45a8ff 974 uint32_t tmp_state = 0;
bogdanm 0:9b334a45a8ff 975
bogdanm 0:9b334a45a8ff 976 tmp_state = hcec->State;
bogdanm 0:9b334a45a8ff 977 if((tmp_state == HAL_CEC_STATE_BUSY_RX) || (tmp_state == HAL_CEC_STATE_BUSY_TX_RX))
bogdanm 0:9b334a45a8ff 978 {
bogdanm 0:9b334a45a8ff 979 temp = hcec->Instance->CSR;
bogdanm 0:9b334a45a8ff 980
bogdanm 0:9b334a45a8ff 981 /* Store received data */
bogdanm 0:9b334a45a8ff 982 *hcec->pRxBuffPtr++ = hcec->Instance->RXD;
bogdanm 0:9b334a45a8ff 983
bogdanm 0:9b334a45a8ff 984 /* Acknowledge received byte by writing 0x00 */
bogdanm 0:9b334a45a8ff 985 MODIFY_REG(hcec->Instance->CSR, CEC_FLAG_RECEIVE_MASK, 0x00);
bogdanm 0:9b334a45a8ff 986
bogdanm 0:9b334a45a8ff 987 /* Increment the number of received data */
bogdanm 0:9b334a45a8ff 988 if(hcec->RxXferSize == CEC_RXXFERSIZE_INITIALIZE)
bogdanm 0:9b334a45a8ff 989 {
bogdanm 0:9b334a45a8ff 990 hcec->RxXferSize = 0;
bogdanm 0:9b334a45a8ff 991 }
bogdanm 0:9b334a45a8ff 992 else
bogdanm 0:9b334a45a8ff 993 {
bogdanm 0:9b334a45a8ff 994 hcec->RxXferSize++;
bogdanm 0:9b334a45a8ff 995 }
bogdanm 0:9b334a45a8ff 996
bogdanm 0:9b334a45a8ff 997 /* If the End Of Message is reached */
bogdanm 0:9b334a45a8ff 998 if(HAL_IS_BIT_SET(temp, CEC_FLAG_REOM))
bogdanm 0:9b334a45a8ff 999 {
bogdanm 0:9b334a45a8ff 1000 if(hcec->State == HAL_CEC_STATE_BUSY_TX_RX)
bogdanm 0:9b334a45a8ff 1001 {
bogdanm 0:9b334a45a8ff 1002 /* Interrupts are not disabled due to transmission still ongoing */
bogdanm 0:9b334a45a8ff 1003
bogdanm 0:9b334a45a8ff 1004 hcec->State = HAL_CEC_STATE_BUSY_TX;
bogdanm 0:9b334a45a8ff 1005 }
bogdanm 0:9b334a45a8ff 1006 else
bogdanm 0:9b334a45a8ff 1007 {
bogdanm 0:9b334a45a8ff 1008 /* Disable the CEC Transmission Interrupts */
bogdanm 0:9b334a45a8ff 1009 __HAL_CEC_DISABLE_IT(hcec, CEC_IT_IE);
bogdanm 0:9b334a45a8ff 1010
bogdanm 0:9b334a45a8ff 1011 hcec->State = HAL_CEC_STATE_READY;
bogdanm 0:9b334a45a8ff 1012 }
bogdanm 0:9b334a45a8ff 1013
bogdanm 0:9b334a45a8ff 1014 HAL_CEC_RxCpltCallback(hcec);
bogdanm 0:9b334a45a8ff 1015
bogdanm 0:9b334a45a8ff 1016 return HAL_OK;
bogdanm 0:9b334a45a8ff 1017 }
bogdanm 0:9b334a45a8ff 1018 else
bogdanm 0:9b334a45a8ff 1019 {
bogdanm 0:9b334a45a8ff 1020 return HAL_BUSY;
bogdanm 0:9b334a45a8ff 1021 }
bogdanm 0:9b334a45a8ff 1022 }
bogdanm 0:9b334a45a8ff 1023 else
bogdanm 0:9b334a45a8ff 1024 {
bogdanm 0:9b334a45a8ff 1025 return HAL_BUSY;
bogdanm 0:9b334a45a8ff 1026 }
bogdanm 0:9b334a45a8ff 1027 }
bogdanm 0:9b334a45a8ff 1028
bogdanm 0:9b334a45a8ff 1029 /**
bogdanm 0:9b334a45a8ff 1030 * @}
bogdanm 0:9b334a45a8ff 1031 */
bogdanm 0:9b334a45a8ff 1032
bogdanm 0:9b334a45a8ff 1033 /**
bogdanm 0:9b334a45a8ff 1034 * @}
bogdanm 0:9b334a45a8ff 1035 */
bogdanm 0:9b334a45a8ff 1036
bogdanm 0:9b334a45a8ff 1037 #endif /* defined(STM32F100xB) || defined(STM32F100xE) */
bogdanm 0:9b334a45a8ff 1038
bogdanm 0:9b334a45a8ff 1039 #endif /* HAL_CEC_MODULE_ENABLED */
bogdanm 0:9b334a45a8ff 1040 /**
bogdanm 0:9b334a45a8ff 1041 * @}
bogdanm 0:9b334a45a8ff 1042 */
bogdanm 0:9b334a45a8ff 1043
bogdanm 0:9b334a45a8ff 1044 /************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/