tmk_core/tool/mbed/mbed-sdk/libraries/mbed/targets/cmsis/TARGET_STM/TARGET_STM32L0/stm32l0xx_hal_tsc.c

   1 /**
   2   ******************************************************************************
   3   * @file    stm32l0xx_hal_tsc.c
   4   * @author  MCD Application Team
   5   * @version V1.2.0
   6   * @date    06-February-2015
   7   * @brief   This file provides firmware functions to manage the following
   8   *          functionalities of the Touch Sensing Controller (TSC) peripheral:
   9   *           + Initialization and DeInitialization
  10   *           + Channel IOs, Shield IOs and Sampling IOs configuration
  11   *           + Start and Stop an acquisition
  12   *           + Read acquisition result
  13   *           + Interrupts and flags management
  14   *
  15   @verbatim
  16 ================================================================================
  17                        ##### TSC specific features #####
  18 ================================================================================
  19   [..]
  20   (#) Proven and robust surface charge transfer acquisition principle
  21
  22   (#) Supports up to 3 capacitive sensing channels per group
  23
  24   (#) Capacitive sensing channels can be acquired in parallel offering a very good
  25       response time
  26
  27   (#) Spread spectrum feature to improve system robustness in noisy environments
  28
  29   (#) Full hardware management of the charge transfer acquisition sequence
  30
  31   (#) Programmable charge transfer frequency
  32
  33   (#) Programmable sampling capacitor I/O pin
  34
  35   (#) Programmable channel I/O pin
  36
  37   (#) Programmable max count value to avoid long acquisition when a channel is faulty
  38
  39   (#) Dedicated end of acquisition and max count error flags with interrupt capability
  40
  41   (#) One sampling capacitor for up to 3 capacitive sensing channels to reduce the system
  42       components
  43
  44   (#) Compatible with proximity, touchkey, linear and rotary touch sensor implementation
  45
  46
  47                           ##### How to use this driver #####
  48 ================================================================================
  49   [..]
  50     (#) Enable the TSC interface clock using __HAL_RCC_TSC_CLK_ENABLE() macro.
  51
  52     (#) GPIO pins configuration
  53       (++) Enable the clock for the TSC GPIOs using __HAL_RCC_GPIOx_CLK_ENABLE() macro.
  54       (++) Configure the TSC pins used as sampling IOs in alternate function output Open-Drain mode,
  55            and TSC pins used as channel/shield IOs in alternate function output Push-Pull mode
  56            using HAL_GPIO_Init() function.
  57       (++) Configure the alternate function on all the TSC pins using HAL_xxxx() function.
  58
  59     (#) Interrupts configuration
  60       (++) Configure the NVIC (if the interrupt model is used) using HAL_xxx() function.
  61
  62     (#) TSC configuration
  63       (++) Configure all TSC parameters and used TSC IOs using HAL_TSC_Init() function.
  64
  65   *** Acquisition sequence ***
  66   ===================================
  67   [..]
  68     (+) Discharge all IOs using HAL_TSC_IODischarge() function.
  69     (+) Wait a certain time allowing a good discharge of all capacitors. This delay depends
  70         of the sampling capacitor and electrodes design.
  71     (+) Select the channel IOs to be acquired using HAL_TSC_IOConfig() function.
  72     (+) Launch the acquisition using either HAL_TSC_Start() or HAL_TSC_Start_IT() function.
  73         If the synchronized mode is selected, the acquisition will start as soon as the signal
  74         is received on the synchro pin.
  75     (+) Wait the end of acquisition using either HAL_TSC_PollForAcquisition() or
  76         HAL_TSC_GetState() function or using WFI instruction for example.
  77     (+) Check the group acquisition status using HAL_TSC_GroupGetStatus() function.
  78     (+) Read the acquisition value using HAL_TSC_GroupGetValue() function.
  79
  80   @endverbatim
  81   ******************************************************************************
  82   * @attention
  83   *
  84   * <h2><center>&copy; COPYRIGHT(c) 2015 STMicroelectronics</center></h2>
  85   *
  86   * Redistribution and use in source and binary forms, with or without modification,
  87   * are permitted provided that the following conditions are met:
  88   *   1. Redistributions of source code must retain the above copyright notice,
  89   *      this list of conditions and the following disclaimer.
  90   *   2. Redistributions in binary form must reproduce the above copyright notice,
  91   *      this list of conditions and the following disclaimer in the documentation
  92   *      and/or other materials provided with the distribution.
  93   *   3. Neither the name of STMicroelectronics nor the names of its contributors
  94   *      may be used to endorse or promote products derived from this software
  95   *      without specific prior written permission.
  96   *
  97   * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
  98   * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  99   * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 100   * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
 101   * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 102   * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
 103   * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
 104   * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
 105   * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 106   * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 107   *
 108   ******************************************************************************
 109   */
 110
 111 /* Includes ------------------------------------------------------------------*/
 112 #if !defined (STM32L031xx) && !defined (STM32L041xx) && !defined (STM32L051xx) && !defined (STM32L061xx) && !defined (STM32L071xx) && !defined (STM32L081xx)
 113 #include "stm32l0xx_hal.h"
 114
 115 #ifdef HAL_TSC_MODULE_ENABLED
 116 /** @addtogroup STM32L0xx_HAL_Driver
 117   * @{
 118   */
 119
 120 /** @defgroup TSC
 121   * @brief HAL TSC module driver
 122   * @{
 123   */
 124
 125
 126 /* Private typedef -----------------------------------------------------------*/
 127 /* Private define ------------------------------------------------------------*/
 128 /* Private macro -------------------------------------------------------------*/
 129 /* Private variables ---------------------------------------------------------*/
 130 /* Private function prototypes -----------------------------------------------*/
 131 static uint32_t TSC_extract_groups(uint32_t iomask);
 132 /* Private functions ---------------------------------------------------------*/
 133
 134 /** @defgroup TSC_Private_Functions
 135   * @{
 136   */
 137
 138 /** @defgroup TSC_Group1 Initialization/de-initialization functions
 139  *  @brief    Initialization and Configuration functions
 140  *
 141 @verbatim
 142  ===============================================================================
 143               ##### Initialization and de-initialization functions #####
 144  ===============================================================================
 145     [..]  This section provides functions allowing to:
 146       (+) Initialize and configure the TSC.
 147       (+) De-initialize the TSC.
 148 @endverbatim
 149   * @{
 150   */
 151
 152 /**
 153   * @brief  Initializes the TSC peripheral according to the specified parameters
 154   *         in the TSC_InitTypeDef structure.
 155   * @param  htsc: TSC handle
 156   * @retval HAL status
 157   */
 158 HAL_StatusTypeDef HAL_TSC_Init(TSC_HandleTypeDef* htsc)
 159 {
 160   /* Check TSC handle allocation */
 161   if (htsc == NULL)
 162   {
 163     return HAL_ERROR;
 164   }
 165
 166   /* Check the parameters */
 167   assert_param(IS_TSC_ALL_INSTANCE(htsc->Instance));
 168   assert_param(IS_TSC_CTPH(htsc->Init.CTPulseHighLength));
 169   assert_param(IS_TSC_CTPL(htsc->Init.CTPulseLowLength));
 170   assert_param(IS_TSC_SS(htsc->Init.SpreadSpectrum));
 171   assert_param(IS_TSC_SSD(htsc->Init.SpreadSpectrumDeviation));
 172   assert_param(IS_TSC_SS_PRESC(htsc->Init.SpreadSpectrumPrescaler));
 173   assert_param(IS_TSC_PG_PRESC(htsc->Init.PulseGeneratorPrescaler));
 174   assert_param(IS_TSC_MCV(htsc->Init.MaxCountValue));
 175   assert_param(IS_TSC_IODEF(htsc->Init.IODefaultMode));
 176   assert_param(IS_TSC_SYNC_POL(htsc->Init.SynchroPinPolarity));
 177   assert_param(IS_TSC_ACQ_MODE(htsc->Init.AcquisitionMode));
 178   assert_param(IS_TSC_MCE_IT(htsc->Init.MaxCountInterrupt));
 179
 180   /* Initialize the TSC state */
 181   htsc->State = HAL_TSC_STATE_BUSY;
 182
 183   /* Init the low level hardware : GPIO, CLOCK, CORTEX */
 184   HAL_TSC_MspInit(htsc);
 185
 186   /*--------------------------------------------------------------------------*/
 187   /* Set TSC parameters */
 188
 189   /* Enable TSC */
 190   htsc->Instance->CR = TSC_CR_TSCE;
 191
 192   /* Set all functions */
 193   htsc->Instance->CR |= (htsc->Init.CTPulseHighLength |
 194                          htsc->Init.CTPulseLowLength |
 195                          (uint32_t)(htsc->Init.SpreadSpectrumDeviation << 17) |
 196                          htsc->Init.SpreadSpectrumPrescaler |
 197                          htsc->Init.PulseGeneratorPrescaler |
 198                          htsc->Init.MaxCountValue |
 199                          htsc->Init.IODefaultMode |
 200                          htsc->Init.SynchroPinPolarity |
 201                          htsc->Init.AcquisitionMode);
 202
 203   /* Spread spectrum */
 204   if (htsc->Init.SpreadSpectrum == ENABLE)
 205   {
 206     htsc->Instance->CR |= TSC_CR_SSE;
 207   }
 208
 209   /* Disable Schmitt trigger hysteresis on all used TSC IOs */
 210   htsc->Instance->IOHCR = (uint32_t)(~(htsc->Init.ChannelIOs | htsc->Init.ShieldIOs | htsc->Init.SamplingIOs));
 211
 212   /* Set channel and shield IOs */
 213   htsc->Instance->IOCCR = (htsc->Init.ChannelIOs | htsc->Init.ShieldIOs);
 214
 215   /* Set sampling IOs */
 216   htsc->Instance->IOSCR = htsc->Init.SamplingIOs;
 217
 218   /* Set the groups to be acquired */
 219   htsc->Instance->IOGCSR = TSC_extract_groups(htsc->Init.ChannelIOs);
 220
 221   /* Clear interrupts */
 222   htsc->Instance->IER &= (uint32_t)(~(TSC_IT_EOA | TSC_IT_MCE));
 223
 224   /* Clear flags */
 225   htsc->Instance->ICR |= (TSC_FLAG_EOA | TSC_FLAG_MCE);
 226
 227   /*--------------------------------------------------------------------------*/
 228
 229   /* Initialize the TSC state */
 230   htsc->State = HAL_TSC_STATE_READY;
 231
 232   /* Return function status */
 233   return HAL_OK;
 234 }
 235
 236 /**
 237   * @brief  Deinitializes the TSC peripheral registers to their default reset values.
 238   * @param  htsc: TSC handle
 239   * @retval HAL status
 240   */
 241 HAL_StatusTypeDef HAL_TSC_DeInit(TSC_HandleTypeDef* htsc)
 242 {
 243   /* Check TSC handle allocation */
 244   if (htsc == NULL)
 245   {
 246     return HAL_ERROR;
 247   }
 248
 249   /* Check the parameters */
 250   assert_param(IS_TSC_ALL_INSTANCE(htsc->Instance));
 251
 252   /* Change TSC state */
 253   htsc->State = HAL_TSC_STATE_BUSY;
 254
 255   /* DeInit the low level hardware */
 256   HAL_TSC_MspDeInit(htsc);
 257
 258   /* Change TSC state */
 259   htsc->State = HAL_TSC_STATE_RESET;
 260
 261   /* Process unlocked */
 262   __HAL_UNLOCK(htsc);
 263
 264   /* Return function status */
 265   return HAL_OK;
 266 }
 267
 268 /**
 269   * @brief  Initializes the TSC MSP.
 270   * @param  htsc: pointer to a TSC_HandleTypeDef structure that contains
 271   *         the configuration information for the specified TSC.
 272   * @retval None
 273   */
 274 __weak void HAL_TSC_MspInit(TSC_HandleTypeDef* htsc)
 275 {
 276   /* NOTE : This function should not be modified, when the callback is needed,
 277             the HAL_TSC_MspInit could be implemented in the user file.
 278    */
 279 }
 280
 281 /**
 282   * @brief  DeInitializes the TSC MSP.
 283   * @param  htsc: pointer to a TSC_HandleTypeDef structure that contains
 284   *         the configuration information for the specified TSC.
 285   * @retval None
 286   */
 287 __weak void HAL_TSC_MspDeInit(TSC_HandleTypeDef* htsc)
 288 {
 289   /* NOTE : This function should not be modified, when the callback is needed,
 290             the HAL_TSC_MspDeInit could be implemented in the user file.
 291    */
 292 }
 293
 294 /**
 295   * @}
 296   */
 297
 298 /** @defgroup HAL_TSC_Group2 IO operation functions
 299  *  @brief    IO operation functions
 300  *
 301 @verbatim
 302  ===============================================================================
 303              ##### I/O Operation functions #####
 304  ===============================================================================
 305     [..]  This section provides functions allowing to:
 306       (+) Start acquisition in polling mode.
 307       (+) Start acquisition in interrupt mode.
 308       (+) Stop conversion in polling mode.
 309       (+) Stop conversion in interrupt mode.
 310       (+) Get group acquisition status.
 311       (+) Get group acquisition value.
 312 @endverbatim
 313   * @{
 314   */
 315
 316 /**
 317   * @brief  Starts the acquisition.
 318   * @param  htsc: pointer to a TSC_HandleTypeDef structure that contains
 319   *         the configuration information for the specified TSC.
 320   * @retval HAL status
 321   */
 322 HAL_StatusTypeDef HAL_TSC_Start(TSC_HandleTypeDef* htsc)
 323 {
 324   /* Check the parameters */
 325   assert_param(IS_TSC_ALL_INSTANCE(htsc->Instance));
 326
 327   /* Process locked */
 328   __HAL_LOCK(htsc);
 329
 330   /* Change TSC state */
 331   htsc->State = HAL_TSC_STATE_BUSY;
 332
 333   /* Clear interrupts */
 334   __HAL_TSC_DISABLE_IT(htsc, (TSC_IT_EOA | TSC_IT_MCE));
 335
 336   /* Clear flags */
 337   __HAL_TSC_CLEAR_FLAG(htsc, (TSC_FLAG_EOA | TSC_FLAG_MCE));
 338
 339   /* Stop discharging the IOs */
 340   __HAL_TSC_SET_IODEF_INFLOAT(htsc);
 341
 342   /* Launch the acquisition */
 343   __HAL_TSC_START_ACQ(htsc);
 344
 345   /* Process unlocked */
 346   __HAL_UNLOCK(htsc);
 347
 348   /* Return function status */
 349   return HAL_OK;
 350 }
 351
 352 /**
 353   * @brief  Enables the interrupt and starts the acquisition
 354   * @param  htsc: pointer to a TSC_HandleTypeDef structure that contains
 355   *         the configuration information for the specified TSC.
 356   * @retval HAL status.
 357   */
 358 HAL_StatusTypeDef HAL_TSC_Start_IT(TSC_HandleTypeDef* htsc)
 359 {
 360   /* Check the parameters */
 361   assert_param(IS_TSC_ALL_INSTANCE(htsc->Instance));
 362   assert_param(IS_TSC_MCE_IT(htsc->Init.MaxCountInterrupt));
 363
 364   /* Process locked */
 365   __HAL_LOCK(htsc);
 366
 367   /* Change TSC state */
 368   htsc->State = HAL_TSC_STATE_BUSY;
 369
 370   /* Enable end of acquisition interrupt */
 371   __HAL_TSC_ENABLE_IT(htsc, TSC_IT_EOA);
 372
 373   /* Enable max count error interrupt (optional) */
 374   if (htsc->Init.MaxCountInterrupt == ENABLE)
 375   {
 376     __HAL_TSC_ENABLE_IT(htsc, TSC_IT_MCE);
 377   }
 378   else
 379   {
 380     __HAL_TSC_DISABLE_IT(htsc, TSC_IT_MCE);
 381   }
 382
 383   /* Clear flags */
 384   __HAL_TSC_CLEAR_FLAG(htsc, (TSC_FLAG_EOA | TSC_FLAG_MCE));
 385
 386   /* Stop discharging the IOs */
 387   __HAL_TSC_SET_IODEF_INFLOAT(htsc);
 388
 389   /* Launch the acquisition */
 390   __HAL_TSC_START_ACQ(htsc);
 391
 392   /* Process unlocked */
 393   __HAL_UNLOCK(htsc);
 394
 395   /* Return function status */
 396   return HAL_OK;
 397 }
 398
 399 /**
 400   * @brief  Stops the acquisition previously launched in polling mode
 401   * @param  htsc: pointer to a TSC_HandleTypeDef structure that contains
 402   *         the configuration information for the specified TSC.
 403   * @retval HAL status
 404   */
 405 HAL_StatusTypeDef HAL_TSC_Stop(TSC_HandleTypeDef* htsc)
 406 {
 407   /* Check the parameters */
 408   assert_param(IS_TSC_ALL_INSTANCE(htsc->Instance));
 409
 410   /* Process locked */
 411   __HAL_LOCK(htsc);
 412
 413   /* Stop the acquisition */
 414   __HAL_TSC_STOP_ACQ(htsc);
 415
 416   /* Clear flags */
 417   __HAL_TSC_CLEAR_FLAG(htsc, (TSC_FLAG_EOA | TSC_FLAG_MCE));
 418
 419   /* Change TSC state */
 420   htsc->State = HAL_TSC_STATE_READY;
 421
 422   /* Process unlocked */
 423   __HAL_UNLOCK(htsc);
 424
 425   /* Return function status */
 426   return HAL_OK;
 427 }
 428
 429 /**
 430   * @brief  Stops the acquisition previously launched in interrupt mode
 431   * @param  htsc: pointer to a TSC_HandleTypeDef structure that contains
 432   *         the configuration information for the specified TSC.
 433   * @retval HAL status
 434   */
 435 HAL_StatusTypeDef HAL_TSC_Stop_IT(TSC_HandleTypeDef* htsc)
 436 {
 437   /* Check the parameters */
 438   assert_param(IS_TSC_ALL_INSTANCE(htsc->Instance));
 439
 440   /* Process locked */
 441   __HAL_LOCK(htsc);
 442
 443   /* Stop the acquisition */
 444   __HAL_TSC_STOP_ACQ(htsc);
 445
 446   /* Disable interrupts */
 447   __HAL_TSC_DISABLE_IT(htsc, (TSC_IT_EOA | TSC_IT_MCE));
 448
 449   /* Clear flags */
 450   __HAL_TSC_CLEAR_FLAG(htsc, (TSC_FLAG_EOA | TSC_FLAG_MCE));
 451
 452   /* Change TSC state */
 453   htsc->State = HAL_TSC_STATE_READY;
 454
 455   /* Process unlocked */
 456   __HAL_UNLOCK(htsc);
 457
 458   /* Return function status */
 459   return HAL_OK;
 460 }
 461
 462 /**
 463   * @brief  Gets the acquisition status for a group
 464   * @param  htsc: pointer to a TSC_HandleTypeDef structure that contains
 465   *         the configuration information for the specified TSC.
 466   * @param  gx_index: Index of the group
 467   * @retval Group status
 468   */
 469 TSC_GroupStatusTypeDef HAL_TSC_GroupGetStatus(TSC_HandleTypeDef* htsc, uint32_t gx_index)
 470 {
 471   /* Check the parameters */
 472   assert_param(IS_TSC_ALL_INSTANCE(htsc->Instance));
 473   assert_param(IS_GROUP_INDEX(gx_index));
 474
 475   /* Return the group status */
 476   return(__HAL_TSC_GET_GROUP_STATUS(htsc, gx_index));
 477 }
 478
 479 /**
 480   * @brief  Gets the acquisition measure for a group
 481   * @param  htsc: pointer to a TSC_HandleTypeDef structure that contains
 482   *         the configuration information for the specified TSC.
 483   * @param  gx_index: Index of the group
 484   * @retval Acquisition measure
 485   */
 486 uint32_t HAL_TSC_GroupGetValue(TSC_HandleTypeDef* htsc, uint32_t gx_index)
 487 {
 488   /* Check the parameters */
 489   assert_param(IS_TSC_ALL_INSTANCE(htsc->Instance));
 490   assert_param(IS_GROUP_INDEX(gx_index));
 491
 492   /* Return the group acquisition counter */
 493   return htsc->Instance->IOGXCR[gx_index];
 494 }
 495
 496 /**
 497   * @}
 498   */
 499
 500 /** @defgroup HAL_TSC_Group3 Peripheral Control functions
 501  *  @brief    Peripheral Control functions
 502  *
 503 @verbatim
 504  ===============================================================================
 505              ##### Peripheral Control functions #####
 506  ===============================================================================
 507     [..]  This section provides functions allowing to:
 508       (+) Configure TSC IOs
 509       (+) Discharge TSC IOs
 510 @endverbatim
 511   * @{
 512   */
 513
 514 /**
 515   * @brief  Configures TSC IOs
 516   * @param  htsc: pointer to a TSC_HandleTypeDef structure that contains
 517   *         the configuration information for the specified TSC.
 518   * @param  config: pointer to the configuration structure.
 519   * @retval HAL status
 520   */
 521 HAL_StatusTypeDef HAL_TSC_IOConfig(TSC_HandleTypeDef* htsc, TSC_IOConfigTypeDef* config)
 522 {
 523   /* Check the parameters */
 524   assert_param(IS_TSC_ALL_INSTANCE(htsc->Instance));
 525
 526   /* Process locked */
 527   __HAL_LOCK(htsc);
 528
 529   /* Stop acquisition */
 530   __HAL_TSC_STOP_ACQ(htsc);
 531
 532   /* Disable Schmitt trigger hysteresis on all used TSC IOs */
 533   htsc->Instance->IOHCR = (uint32_t)(~(config->ChannelIOs | config->ShieldIOs | config->SamplingIOs));
 534
 535   /* Set channel and shield IOs */
 536   htsc->Instance->IOCCR = (config->ChannelIOs | config->ShieldIOs);
 537
 538   /* Set sampling IOs */
 539   htsc->Instance->IOSCR = config->SamplingIOs;
 540
 541   /* Set groups to be acquired */
 542   htsc->Instance->IOGCSR = TSC_extract_groups(config->ChannelIOs);
 543
 544   /* Process unlocked */
 545   __HAL_UNLOCK(htsc);
 546
 547   /* Return function status */
 548   return HAL_OK;
 549 }
 550
 551 /**
 552   * @brief  Discharge TSC IOs
 553   * @param  htsc: pointer to a TSC_HandleTypeDef structure that contains
 554   *         the configuration information for the specified TSC.
 555   * @param  choice: enable or disable
 556   * @retval HAL status
 557   */
 558 HAL_StatusTypeDef HAL_TSC_IODischarge(TSC_HandleTypeDef* htsc, uint32_t choice)
 559 {
 560   /* Check the parameters */
 561   assert_param(IS_TSC_ALL_INSTANCE(htsc->Instance));
 562
 563   /* Process locked */
 564   __HAL_LOCK(htsc);
 565
 566   if (choice == ENABLE)
 567   {
 568     __HAL_TSC_SET_IODEF_OUTPPLOW(htsc);
 569   }
 570   else
 571   {
 572     __HAL_TSC_SET_IODEF_INFLOAT(htsc);
 573   }
 574
 575   /* Process unlocked */
 576   __HAL_UNLOCK(htsc);
 577
 578   /* Return the group acquisition counter */
 579   return HAL_OK;
 580 }
 581
 582 /**
 583   * @}
 584   */
 585
 586 /** @defgroup HAL_TSC_Group4 State functions
 587  *  @brief   State functions
 588  *
 589 @verbatim
 590  ===============================================================================
 591             ##### State functions #####
 592  ===============================================================================
 593     [..]
 594     This subsection provides functions allowing to
 595       (+) Get TSC state.
 596       (+) Poll for acquisition completed.
 597       (+) Handles TSC interrupt request.
 598
 599 @endverbatim
 600   * @{
 601   */
 602
 603 /**
 604   * @brief  Return the TSC state
 605   * @param  htsc: pointer to a TSC_HandleTypeDef structure that contains
 606   *         the configuration information for the specified TSC.
 607   * @retval HAL state
 608   */
 609 HAL_TSC_StateTypeDef HAL_TSC_GetState(TSC_HandleTypeDef* htsc)
 610 {
 611   /* Check the parameters */
 612   assert_param(IS_TSC_ALL_INSTANCE(htsc->Instance));
 613
 614   if (htsc->State == HAL_TSC_STATE_BUSY)
 615   {
 616     /* Check end of acquisition flag */
 617     if (__HAL_TSC_GET_FLAG(htsc, TSC_FLAG_EOA) != RESET)
 618     {
 619       /* Check max count error flag */
 620       if (__HAL_TSC_GET_FLAG(htsc, TSC_FLAG_MCE) != RESET)
 621       {
 622         /* Change TSC state */
 623         htsc->State = HAL_TSC_STATE_ERROR;
 624       }
 625       else
 626       {
 627         /* Change TSC state */
 628         htsc->State = HAL_TSC_STATE_READY;
 629       }
 630     }
 631   }
 632
 633   /* Return TSC state */
 634   return htsc->State;
 635 }
 636
 637 /**
 638   * @brief  Start acquisition and wait until completion
 639   * @note   There is no need of a timeout parameter as the max count error is already
 640   *         managed by the TSC peripheral.
 641   * @param  htsc: pointer to a TSC_HandleTypeDef structure that contains
 642   *         the configuration information for the specified TSC.
 643   * @retval HAL state
 644   */
 645 HAL_StatusTypeDef HAL_TSC_PollForAcquisition(TSC_HandleTypeDef* htsc)
 646 {
 647   /* Check the parameters */
 648   assert_param(IS_TSC_ALL_INSTANCE(htsc->Instance));
 649
 650   /* Process locked */
 651   __HAL_LOCK(htsc);
 652
 653   /* Check end of acquisition */
 654   while (HAL_TSC_GetState(htsc) == HAL_TSC_STATE_BUSY)
 655   {
 656     /* The timeout (max count error) is managed by the TSC peripheral itself. */
 657   }
 658
 659   /* Process unlocked */
 660   __HAL_UNLOCK(htsc);
 661
 662   return HAL_OK;
 663 }
 664
 665 /**
 666   * @brief  Handles TSC interrupt request
 667   * @param  htsc: pointer to a TSC_HandleTypeDef structure that contains
 668   *         the configuration information for the specified TSC.
 669   * @retval None
 670   */
 671 void HAL_TSC_IRQHandler(TSC_HandleTypeDef* htsc)
 672 {
 673   /* Check the parameters */
 674   assert_param(IS_TSC_ALL_INSTANCE(htsc->Instance));
 675
 676   /* Check if the end of acquisition occured */
 677   if (__HAL_TSC_GET_FLAG(htsc, TSC_FLAG_EOA) != RESET)
 678   {
 679     /* Clear EOA flag */
 680     __HAL_TSC_CLEAR_FLAG(htsc, TSC_FLAG_EOA);
 681   }
 682
 683   /* Check if max count error occured */
 684   if (__HAL_TSC_GET_FLAG(htsc, TSC_FLAG_MCE) != RESET)
 685   {
 686     /* Clear MCE flag */
 687     __HAL_TSC_CLEAR_FLAG(htsc, TSC_FLAG_MCE);
 688     /* Change TSC state */
 689     htsc->State = HAL_TSC_STATE_ERROR;
 690     /* Conversion completed callback */
 691     HAL_TSC_ErrorCallback(htsc);
 692   }
 693   else
 694   {
 695     /* Change TSC state */
 696     htsc->State = HAL_TSC_STATE_READY;
 697     /* Conversion completed callback */
 698     HAL_TSC_ConvCpltCallback(htsc);
 699   }
 700 }
 701
 702 /**
 703   * @}
 704   */
 705
 706 /**
 707   * @brief  Acquisition completed callback in non blocking mode
 708   * @param  htsc: pointer to a TSC_HandleTypeDef structure that contains
 709   *         the configuration information for the specified TSC.
 710   * @retval None
 711   */
 712 __weak void HAL_TSC_ConvCpltCallback(TSC_HandleTypeDef* htsc)
 713 {
 714   /* NOTE : This function should not be modified, when the callback is needed,
 715             the HAL_TSC_ConvCpltCallback could be implemented in the user file.
 716    */
 717 }
 718
 719 /**
 720   * @brief  Error callback in non blocking mode
 721   * @param  htsc: pointer to a TSC_HandleTypeDef structure that contains
 722   *         the configuration information for the specified TSC.
 723   * @retval None
 724   */
 725 __weak void HAL_TSC_ErrorCallback(TSC_HandleTypeDef* htsc)
 726 {
 727   /* NOTE : This function should not be modified, when the callback is needed,
 728             the HAL_TSC_ErrorCallback could be implemented in the user file.
 729    */
 730 }
 731
 732 /**
 733   * @brief  Utility function used to set the acquired groups mask
 734   * @param  iomask: Channels IOs mask
 735   * @retval Acquired groups mask
 736   */
 737 static uint32_t TSC_extract_groups(uint32_t iomask)
 738 {
 739   uint32_t groups = 0;
 740   uint32_t idx;
 741
 742   for (idx = 0; idx < TSC_NB_OF_GROUPS; idx++)
 743   {
 744     if ((iomask & ((uint32_t)0x0F << (idx * 4))) != RESET)
 745     {
 746       groups |= ((uint32_t)1 << idx);
 747     }
 748   }
 749
 750   return groups;
 751 }
 752
 753 /**
 754   * @}
 755   */
 756
 757
 758 /**
 759   * @}
 760   */
 761
 762 /**
 763   * @}
 764   */
 765 #endif /* HAL_TSC_MODULE_ENABLED */
 766 #endif /* #if !defined (STM32L031xx) && !defined (STM32L041xx) && !defined (STM32L051xx) && !defined (STM32L061xx) && !defined (STM32L071xx) && !defined (STM32L081xx) */
 767
 768 /************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/
 769