Diff: targets/cmsis/TARGET_STM/TARGET_STM32L4/stm32l4xx_hal_tsc.c

Revision:

610:813dcc80987e

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/targets/cmsis/TARGET_STM/TARGET_STM32L4/stm32l4xx_hal_tsc.c	Fri Aug 14 13:15:17 2015 +0100
@@ -0,0 +1,838 @@
+/**
+  ******************************************************************************
+  * @file    stm32l4xx_hal_tsc.c
+  * @author  MCD Application Team
+  * @version V1.0.0
+  * @date    26-June-2015
+  * @brief   This file provides firmware functions to manage the following 
+  *          functionalities of the Touch Sensing Controller (TSC) peripheral:
+  *           + Initialization and De-initialization
+  *           + Channel IOs, Shield IOs and Sampling IOs configuration
+  *           + Start and Stop an acquisition
+  *           + Read acquisition result
+  *           + Interrupts and flags management
+  *         
+  @verbatim
+================================================================================
+                       ##### TSC specific features #####
+================================================================================
+  [..]
+  (#) Proven and robust surface charge transfer acquisition principle
+    
+  (#) Supports up to 3 capacitive sensing channels per group
+    
+  (#) Capacitive sensing channels can be acquired in parallel offering a very good
+      response time
+      
+  (#) Spread spectrum feature to improve system robustness in noisy environments
+   
+  (#) Full hardware management of the charge transfer acquisition sequence
+   
+  (#) Programmable charge transfer frequency
+   
+  (#) Programmable sampling capacitor I/O pin
+   
+  (#) Programmable channel I/O pin
+   
+  (#) Programmable max count value to avoid long acquisition when a channel is faulty
+   
+  (#) Dedicated end of acquisition and max count error flags with interrupt capability
+   
+  (#) One sampling capacitor for up to 3 capacitive sensing channels to reduce the system
+      components
+   
+  (#) Compatible with proximity, touchkey, linear and rotary touch sensor implementation
+
+   
+                          ##### How to use this driver #####
+================================================================================
+  [..]
+    (#) Enable the TSC interface clock using __HAL_RCC_TSC_CLK_ENABLE() macro.
+
+    (#) GPIO pins configuration
+      (++) Enable the clock for the TSC GPIOs using __HAL_RCC_GPIOx_CLK_ENABLE() macro.
+      (++) Configure the TSC pins used as sampling IOs in alternate function output Open-Drain mode,
+           and TSC pins used as channel/shield IOs in alternate function output Push-Pull mode
+           using HAL_GPIO_Init() function (see Table 1).
+
+    (#) Interrupts configuration
+      (++) Configure the NVIC (if the interrupt model is used) using HAL_NVIC_SetPriority() 
+           and HAL_NVIC_EnableIRQ() and function.
+
+    (#) TSC configuration
+      (++) Configure all TSC parameters and used TSC IOs using HAL_TSC_Init() function.
+
+ [..] Table 1. IOs for the STM32L4xx devices
+ (+)   +--------------------------------+     
+ (+)   |       IOs    |   TSC functions | 
+ (+)   |--------------|-----------------|
+ (+)   |   PB12 (AF)  |   TSC_G1_IO1    | 
+ (+)   |   PB13 (AF)  |   TSC_G1_IO2    | 
+ (+)   |   PB14 (AF)  |   TSC_G1_IO3    | 
+ (+)   |   PB15 (AF)  |   TSC_G1_IO4    | 
+ (+)   |--------------|-----------------|
+ (+)   |   PB4 (AF)   |   TSC_G2_IO1    | 
+ (+)   |   PB5 (AF)   |   TSC_G2_IO2    | 
+ (+)   |   PB6 (AF)   |   TSC_G2_IO3    | 
+ (+)   |   PB7 (AF)   |   TSC_G2_IO4    | 
+ (+)   |--------------|-----------------|
+ (+)   |   PA15 (AF)  |   TSC_G3_IO1    | 
+ (+)   |   PC10 (AF)  |   TSC_G3_IO2    | 
+ (+)   |   PC11 (AF)  |   TSC_G3_IO3    | 
+ (+)   |   PC12 (AF)  |   TSC_G3_IO4    | 
+ (+)   |--------------|-----------------|
+ (+)   |   PC6 (AF)   |   TSC_G4_IO1    | 
+ (+)   |   PC7 (AF)   |   TSC_G4_IO2    | 
+ (+)   |   PC8 (AF)   |   TSC_G4_IO3    | 
+ (+)   |   PC9 (AF)   |   TSC_G4_IO4    | 
+ (+)   |--------------|-----------------|
+ (+)   |   PE10 (AF)  |   TSC_G5_IO1    | 
+ (+)   |   PE11 (AF)  |   TSC_G5_IO2    | 
+ (+)   |   PE12 (AF)  |   TSC_G5_IO3    | 
+ (+)   |   PE13 (AF)  |   TSC_G5_IO4    | 
+ (+)   |--------------|-----------------|
+ (+)   |   PD10 (AF)  |   TSC_G6_IO1    | 
+ (+)   |   PD11 (AF)  |   TSC_G6_IO2    | 
+ (+)   |   PD12 (AF)  |   TSC_G6_IO3    | 
+ (+)   |   PD13 (AF)  |   TSC_G6_IO4    | 
+ (+)   |--------------|-----------------|
+ (+)   |   PE2 (AF)   |   TSC_G7_IO1    | 
+ (+)   |   PE3 (AF)   |   TSC_G7_IO2    | 
+ (+)   |   PE4 (AF)   |   TSC_G7_IO3    | 
+ (+)   |   PE5 (AF)   |   TSC_G7_IO4    | 
+ (+)   |--------------|-----------------|
+ (+)   |   PF14 (AF)  |   TSC_G8_IO1    | 
+ (+)   |   PF15 (AF)  |   TSC_G8_IO2    | 
+ (+)   |   PG0 (AF)   |   TSC_G8_IO3    | 
+ (+)   |   PG1 (AF)   |   TSC_G8_IO4    | 
+ (+)   |--------------|-----------------|
+ (+)   |   PB10 (AF)  |   TSC_SYNC      | 
+ (+)   |   PD2 (AF)   |                 | 
+ (+)   +--------------------------------+
+ [..]   TSC peripheral alternate functions are mapped on AF9.
+ 
+  *** Acquisition sequence ***
+  ===================================
+  [..]
+    (+) Discharge all IOs using HAL_TSC_IODischarge() function.
+    (+) Wait a certain time allowing a good discharge of all capacitors. This delay depends
+        of the sampling capacitor and electrodes design.
+    (+) Select the channel IOs to be acquired using HAL_TSC_IOConfig() function.
+    (+) Launch the acquisition using either HAL_TSC_Start() or HAL_TSC_Start_IT() function.
+        If the synchronized mode is selected, the acquisition will start as soon as the signal
+        is received on the synchro pin.
+    (+) Wait the end of acquisition using either HAL_TSC_PollForAcquisition() or
+        HAL_TSC_GetState() function or using WFI instruction for example.
+    (+) Check the group acquisition status using HAL_TSC_GroupGetStatus() function.
+    (+) Read the acquisition value using HAL_TSC_GroupGetValue() function.
+      
+ @endverbatim
+  ******************************************************************************
+  * @attention
+  *
+  * <h2><center>&copy; COPYRIGHT(c) 2015 STMicroelectronics</center></h2>
+  *
+  * Redistribution and use in source and binary forms, with or without modification,
+  * are permitted provided that the following conditions are met:
+  *   1. Redistributions of source code must retain the above copyright notice,
+  *      this list of conditions and the following disclaimer.
+  *   2. Redistributions in binary form must reproduce the above copyright notice,
+  *      this list of conditions and the following disclaimer in the documentation
+  *      and/or other materials provided with the distribution.
+  *   3. Neither the name of STMicroelectronics nor the names of its contributors
+  *      may be used to endorse or promote products derived from this software
+  *      without specific prior written permission.
+  *
+  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+  * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
+  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+  * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+  * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+  * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+  *
+  ******************************************************************************
+  */
+
+/* Includes ------------------------------------------------------------------*/
+#include "stm32l4xx_hal.h"
+
+/** @addtogroup STM32L4xx_HAL_Driver
+  * @{
+  */
+
+/** @defgroup TSC TSC
+  * @brief HAL TSC module driver
+  * @{
+  */
+
+#ifdef HAL_TSC_MODULE_ENABLED
+    
+/* Private typedef -----------------------------------------------------------*/
+/* Private define ------------------------------------------------------------*/
+/* Private macro -------------------------------------------------------------*/
+/* Private variables ---------------------------------------------------------*/
+/* Private function prototypes -----------------------------------------------*/
+static uint32_t TSC_extract_groups(uint32_t iomask);
+
+/* Exported functions --------------------------------------------------------*/
+
+/** @defgroup TSC_Exported_Functions Exported Functions
+  * @{
+  */ 
+
+/** @defgroup TSC_Exported_Functions_Group1 Initialization and de-initialization functions
+ *  @brief    Initialization and Configuration functions 
+ *
+@verbatim    
+ ===============================================================================
+              ##### Initialization and de-initialization functions #####
+ ===============================================================================
+    [..]  This section provides functions allowing to:
+      (+) Initialize and configure the TSC.
+      (+) De-initialize the TSC.
+@endverbatim
+  * @{
+  */
+
+/**
+  * @brief  Initialize the TSC peripheral according to the specified parameters 
+  *         in the TSC_InitTypeDef structure and initialize the associated handle.
+  * @param  htsc: TSC handle
+  * @retval HAL status
+  */
+HAL_StatusTypeDef HAL_TSC_Init(TSC_HandleTypeDef* htsc)
+{
+  /* Check TSC handle allocation */
+  if (htsc == NULL)
+  {
+    return HAL_ERROR;
+  }
+
+  /* Check the parameters */
+  assert_param(IS_TSC_ALL_INSTANCE(htsc->Instance));
+  assert_param(IS_TSC_CTPH(htsc->Init.CTPulseHighLength));
+  assert_param(IS_TSC_CTPL(htsc->Init.CTPulseLowLength));
+  assert_param(IS_TSC_SS(htsc->Init.SpreadSpectrum));
+  assert_param(IS_TSC_SSD(htsc->Init.SpreadSpectrumDeviation));
+  assert_param(IS_TSC_SS_PRESC(htsc->Init.SpreadSpectrumPrescaler));
+  assert_param(IS_TSC_PG_PRESC(htsc->Init.PulseGeneratorPrescaler));
+  assert_param(IS_TSC_MCV(htsc->Init.MaxCountValue));
+  assert_param(IS_TSC_IODEF(htsc->Init.IODefaultMode));
+  assert_param(IS_TSC_SYNC_POL(htsc->Init.SynchroPinPolarity));
+  assert_param(IS_TSC_ACQ_MODE(htsc->Init.AcquisitionMode));
+  assert_param(IS_TSC_MCE_IT(htsc->Init.MaxCountInterrupt));
+    
+  if(htsc->State == HAL_TSC_STATE_RESET)
+  {
+    /* Allocate lock resource and initialize it */
+    htsc->Lock = HAL_UNLOCKED;
+  }
+
+  /* Initialize the TSC state */
+  htsc->State = HAL_TSC_STATE_BUSY;
+
+  /* Init the low level hardware : GPIO, CLOCK, CORTEX */
+  HAL_TSC_MspInit(htsc);
+
+  /*--------------------------------------------------------------------------*/  
+  /* Set TSC parameters */
+
+  /* Enable TSC */
+  htsc->Instance->CR = TSC_CR_TSCE;
+  
+  /* Set all functions */
+  htsc->Instance->CR |= (htsc->Init.CTPulseHighLength |
+                         htsc->Init.CTPulseLowLength |
+                         (uint32_t)(htsc->Init.SpreadSpectrumDeviation << 17) |
+                         htsc->Init.SpreadSpectrumPrescaler |
+                         htsc->Init.PulseGeneratorPrescaler |
+                         htsc->Init.MaxCountValue |
+                         htsc->Init.IODefaultMode |
+                         htsc->Init.SynchroPinPolarity |
+                         htsc->Init.AcquisitionMode);
+
+  /* Spread spectrum */
+  if (htsc->Init.SpreadSpectrum == ENABLE)
+  {
+    htsc->Instance->CR |= TSC_CR_SSE;
+  }
+  
+  /* Disable Schmitt trigger hysteresis on all used TSC IOs */
+  htsc->Instance->IOHCR = (uint32_t)(~(htsc->Init.ChannelIOs | htsc->Init.ShieldIOs | htsc->Init.SamplingIOs));
+
+  /* Set channel and shield IOs */
+  htsc->Instance->IOCCR = (htsc->Init.ChannelIOs | htsc->Init.ShieldIOs);
+  
+  /* Set sampling IOs */
+  htsc->Instance->IOSCR = htsc->Init.SamplingIOs;
+  
+  /* Set the groups to be acquired */
+  htsc->Instance->IOGCSR = TSC_extract_groups(htsc->Init.ChannelIOs);
+  
+  /* Disable interrupts */
+  htsc->Instance->IER &= (uint32_t)(~(TSC_IT_EOA | TSC_IT_MCE));
+  
+  /* Clear flags */
+  htsc->Instance->ICR = (TSC_FLAG_EOA | TSC_FLAG_MCE);
+
+  /*--------------------------------------------------------------------------*/
+  
+  /* Initialize the TSC state */
+  htsc->State = HAL_TSC_STATE_READY;
+  
+  /* Return function status */
+  return HAL_OK;
+}
+
+/**
+  * @brief  Deinitialize the TSC peripheral registers to their default reset values.
+  * @param  htsc: TSC handle  
+  * @retval HAL status
+  */
+HAL_StatusTypeDef HAL_TSC_DeInit(TSC_HandleTypeDef* htsc)
+{
+  /* Check TSC handle allocation */
+  if (htsc == NULL)
+  {
+    return HAL_ERROR;
+  }
+
+  /* Check the parameters */
+  assert_param(IS_TSC_ALL_INSTANCE(htsc->Instance));
+   
+  /* Change TSC state */
+  htsc->State = HAL_TSC_STATE_BUSY;
+ 
+  /* DeInit the low level hardware */
+  HAL_TSC_MspDeInit(htsc);
+  
+  /* Change TSC state */
+  htsc->State = HAL_TSC_STATE_RESET;
+
+  /* Process unlocked */
+  __HAL_UNLOCK(htsc);
+
+  /* Return function status */
+  return HAL_OK;
+}
+
+/**
+  * @brief  Initialize the TSC MSP.
+  * @param  htsc: pointer to a TSC_HandleTypeDef structure that contains
+  *         the configuration information for the specified TSC.  
+  * @retval None
+  */
+__weak void HAL_TSC_MspInit(TSC_HandleTypeDef* htsc)
+{
+  /* NOTE : This function should not be modified, when the callback is needed,
+            the HAL_TSC_MspInit could be implemented in the user file.
+   */ 
+}
+
+/**
+  * @brief  DeInitialize the TSC MSP.
+  * @param  htsc: pointer to a TSC_HandleTypeDef structure that contains
+  *         the configuration information for the specified TSC.  
+  * @retval None
+  */
+__weak void HAL_TSC_MspDeInit(TSC_HandleTypeDef* htsc)
+{
+  /* NOTE : This function should not be modified, when the callback is needed,
+            the HAL_TSC_MspDeInit could be implemented in the user file.
+   */ 
+}
+
+/**
+  * @}
+  */
+
+/** @defgroup TSC_Exported_Functions_Group2 Input and Output operation functions
+ *  @brief    Input and Output operation functions 
+ *
+@verbatim   
+ ===============================================================================
+             ##### IO Operation functions #####
+ ===============================================================================  
+    [..]  This section provides functions allowing to:
+      (+) Start acquisition in polling mode.
+      (+) Start acquisition in interrupt mode.
+      (+) Stop conversion in polling mode.
+      (+) Stop conversion in interrupt mode.
+      (+) Poll for acquisition completed.
+      (+) Get group acquisition status.
+      (+) Get group acquisition value.
+@endverbatim
+  * @{
+  */
+
+/**
+  * @brief  Start the acquisition.
+  * @param  htsc: pointer to a TSC_HandleTypeDef structure that contains
+  *         the configuration information for the specified TSC.
+  * @retval HAL status
+  */
+HAL_StatusTypeDef HAL_TSC_Start(TSC_HandleTypeDef* htsc)
+{
+  /* Check the parameters */
+  assert_param(IS_TSC_ALL_INSTANCE(htsc->Instance));
+  
+  /* Process locked */
+  __HAL_LOCK(htsc);
+  
+  /* Change TSC state */
+  htsc->State = HAL_TSC_STATE_BUSY;
+
+  /* Clear interrupts */
+  __HAL_TSC_DISABLE_IT(htsc, (TSC_IT_EOA | TSC_IT_MCE));
+
+  /* Clear flags */
+  __HAL_TSC_CLEAR_FLAG(htsc, (TSC_FLAG_EOA | TSC_FLAG_MCE));
+
+  /* Stop discharging the IOs */
+  __HAL_TSC_SET_IODEF_INFLOAT(htsc);
+  
+  /* Launch the acquisition */
+  __HAL_TSC_START_ACQ(htsc);
+  
+  /* Process unlocked */
+  __HAL_UNLOCK(htsc);
+  
+  /* Return function status */
+  return HAL_OK;
+}
+
+/**
+  * @brief  Start the acquisition in interrupt mode.
+  * @param  htsc: pointer to a TSC_HandleTypeDef structure that contains
+  *         the configuration information for the specified TSC.
+  * @retval HAL status.
+  */
+HAL_StatusTypeDef HAL_TSC_Start_IT(TSC_HandleTypeDef* htsc)
+{
+  /* Check the parameters */
+  assert_param(IS_TSC_ALL_INSTANCE(htsc->Instance));
+  assert_param(IS_TSC_MCE_IT(htsc->Init.MaxCountInterrupt));
+
+  /* Process locked */
+  __HAL_LOCK(htsc);
+  
+  /* Change TSC state */
+  htsc->State = HAL_TSC_STATE_BUSY;
+  
+  /* Enable end of acquisition interrupt */
+  __HAL_TSC_ENABLE_IT(htsc, TSC_IT_EOA);
+
+  /* Enable max count error interrupt (optional) */
+  if (htsc->Init.MaxCountInterrupt == ENABLE)
+  {
+    __HAL_TSC_ENABLE_IT(htsc, TSC_IT_MCE);
+  }
+  else
+  {
+    __HAL_TSC_DISABLE_IT(htsc, TSC_IT_MCE);
+  }
+
+  /* Clear flags */
+  __HAL_TSC_CLEAR_FLAG(htsc, (TSC_FLAG_EOA | TSC_FLAG_MCE));
+  
+  /* Stop discharging the IOs */
+  __HAL_TSC_SET_IODEF_INFLOAT(htsc);
+  
+  /* Launch the acquisition */
+  __HAL_TSC_START_ACQ(htsc);
+
+  /* Process unlocked */
+  __HAL_UNLOCK(htsc);
+  
+  /* Return function status */
+  return HAL_OK;
+}
+
+/**
+  * @brief  Stop the acquisition previously launched in polling mode.
+  * @param  htsc: pointer to a TSC_HandleTypeDef structure that contains
+  *         the configuration information for the specified TSC.
+  * @retval HAL status
+  */
+HAL_StatusTypeDef HAL_TSC_Stop(TSC_HandleTypeDef* htsc)
+{
+  /* Check the parameters */
+  assert_param(IS_TSC_ALL_INSTANCE(htsc->Instance));
+
+  /* Process locked */
+  __HAL_LOCK(htsc);
+  
+  /* Stop the acquisition */
+  __HAL_TSC_STOP_ACQ(htsc);
+
+  /* Clear flags */
+  __HAL_TSC_CLEAR_FLAG(htsc, (TSC_FLAG_EOA | TSC_FLAG_MCE));
+  
+  /* Change TSC state */
+  htsc->State = HAL_TSC_STATE_READY;
+
+  /* Process unlocked */
+  __HAL_UNLOCK(htsc);
+  
+  /* Return function status */
+  return HAL_OK;
+}
+
+/**
+  * @brief  Stop the acquisition previously launched in interrupt mode.
+  * @param  htsc: pointer to a TSC_HandleTypeDef structure that contains
+  *         the configuration information for the specified TSC.
+  * @retval HAL status
+  */
+HAL_StatusTypeDef HAL_TSC_Stop_IT(TSC_HandleTypeDef* htsc)
+{
+  /* Check the parameters */
+  assert_param(IS_TSC_ALL_INSTANCE(htsc->Instance));
+
+  /* Process locked */
+  __HAL_LOCK(htsc);
+  
+  /* Stop the acquisition */
+  __HAL_TSC_STOP_ACQ(htsc);
+  
+  /* Disable interrupts */
+  __HAL_TSC_DISABLE_IT(htsc, (TSC_IT_EOA | TSC_IT_MCE));
+
+  /* Clear flags */
+  __HAL_TSC_CLEAR_FLAG(htsc, (TSC_FLAG_EOA | TSC_FLAG_MCE));
+  
+  /* Change TSC state */
+  htsc->State = HAL_TSC_STATE_READY;
+
+  /* Process unlocked */
+  __HAL_UNLOCK(htsc);
+  
+  /* Return function status */
+  return HAL_OK;
+}
+
+/**
+  * @brief  Start acquisition and wait until completion.
+  * @note   There is no need of a timeout parameter as the max count error is already
+  *         managed by the TSC peripheral.
+  * @param  htsc: pointer to a TSC_HandleTypeDef structure that contains
+  *         the configuration information for the specified TSC.
+  * @retval HAL state
+  */
+HAL_StatusTypeDef HAL_TSC_PollForAcquisition(TSC_HandleTypeDef* htsc)
+{
+  /* Check the parameters */
+  assert_param(IS_TSC_ALL_INSTANCE(htsc->Instance));
+
+  /* Process locked */
+  __HAL_LOCK(htsc);
+  
+  /* Check end of acquisition */
+  while (HAL_TSC_GetState(htsc) == HAL_TSC_STATE_BUSY)
+  {
+    /* The timeout (max count error) is managed by the TSC peripheral itself. */
+  }
+
+  /* Process unlocked */
+  __HAL_UNLOCK(htsc);
+  
+  return HAL_OK;
+}
+
+/**
+  * @brief  Get the acquisition status for a group.
+  * @param  htsc: pointer to a TSC_HandleTypeDef structure that contains
+  *         the configuration information for the specified TSC.
+  * @param  gx_index: Index of the group
+  * @retval Group status
+  */
+TSC_GroupStatusTypeDef HAL_TSC_GroupGetStatus(TSC_HandleTypeDef* htsc, uint32_t gx_index)
+{
+  /* Check the parameters */
+  assert_param(IS_TSC_ALL_INSTANCE(htsc->Instance));
+  assert_param(IS_TSC_GROUP_INDEX(gx_index));
+
+  /* Return the group status */ 
+  return(__HAL_TSC_GET_GROUP_STATUS(htsc, gx_index));
+}
+
+/**
+  * @brief  Get the acquisition measure for a group.
+  * @param  htsc: pointer to a TSC_HandleTypeDef structure that contains
+  *         the configuration information for the specified TSC.
+  * @param  gx_index: Index of the group
+  * @retval Acquisition measure
+  */
+uint32_t HAL_TSC_GroupGetValue(TSC_HandleTypeDef* htsc, uint32_t gx_index)
+{       
+  /* Check the parameters */
+  assert_param(IS_TSC_ALL_INSTANCE(htsc->Instance));
+  assert_param(IS_TSC_GROUP_INDEX(gx_index));
+
+  /* Return the group acquisition counter */ 
+  return htsc->Instance->IOGXCR[gx_index];
+}
+
+/**
+  * @}
+  */
+  
+/** @defgroup TSC_Exported_Functions_Group3 Peripheral Control functions
+ *  @brief    Peripheral Control functions 
+ *
+@verbatim   
+ ===============================================================================
+             ##### Peripheral Control functions #####
+ ===============================================================================  
+    [..]  This section provides functions allowing to:
+      (+) Configure TSC IOs
+      (+) Discharge TSC IOs
+@endverbatim
+  * @{
+  */
+
+/**
+  * @brief  Configure TSC IOs.
+  * @param  htsc: pointer to a TSC_HandleTypeDef structure that contains
+  *         the configuration information for the specified TSC.
+  * @param  config: pointer to the configuration structure.
+  * @retval HAL status
+  */
+HAL_StatusTypeDef HAL_TSC_IOConfig(TSC_HandleTypeDef* htsc, TSC_IOConfigTypeDef* config)
+{
+  /* Check the parameters */
+  assert_param(IS_TSC_ALL_INSTANCE(htsc->Instance));
+ 
+  /* Process locked */
+  __HAL_LOCK(htsc);
+
+  /* Stop acquisition */
+  __HAL_TSC_STOP_ACQ(htsc);
+
+  /* Disable Schmitt trigger hysteresis on all used TSC IOs */
+  htsc->Instance->IOHCR = (uint32_t)(~(config->ChannelIOs | config->ShieldIOs | config->SamplingIOs));
+
+  /* Set channel and shield IOs */
+  htsc->Instance->IOCCR = (config->ChannelIOs | config->ShieldIOs);
+  
+  /* Set sampling IOs */
+  htsc->Instance->IOSCR = config->SamplingIOs;
+  
+  /* Set groups to be acquired */
+  htsc->Instance->IOGCSR = TSC_extract_groups(config->ChannelIOs);
+    
+  /* Process unlocked */
+  __HAL_UNLOCK(htsc);
+  
+  /* Return function status */
+  return HAL_OK;
+}
+
+/**
+  * @brief  Discharge TSC IOs.
+  * @param  htsc: pointer to a TSC_HandleTypeDef structure that contains
+  *         the configuration information for the specified TSC.
+  * @param  choice: enable or disable
+  * @retval HAL status
+  */
+HAL_StatusTypeDef HAL_TSC_IODischarge(TSC_HandleTypeDef* htsc, uint32_t choice)
+{       
+  /* Check the parameters */
+  assert_param(IS_TSC_ALL_INSTANCE(htsc->Instance));
+
+  /* Process locked */
+  __HAL_LOCK(htsc);
+  
+  if (choice == ENABLE)
+  {
+    __HAL_TSC_SET_IODEF_OUTPPLOW(htsc);
+  }
+  else
+  {
+    __HAL_TSC_SET_IODEF_INFLOAT(htsc);
+  }
+
+  /* Process unlocked */
+  __HAL_UNLOCK(htsc);
+  
+  /* Return the group acquisition counter */ 
+  return HAL_OK;
+}
+
+/**
+  * @}
+  */
+
+/** @defgroup TSC_Exported_Functions_Group4 Peripheral State and Errors functions
+ *  @brief   Peripheral State and Errors functions 
+ *
+@verbatim   
+ ===============================================================================
+            ##### State and Errors functions #####
+ ===============================================================================  
+    [..]
+    This subsection provides functions allowing to
+      (+) Get TSC state.
+         
+@endverbatim
+  * @{
+  */
+
+/**
+  * @brief  Return the TSC handle state.
+  * @param  htsc: pointer to a TSC_HandleTypeDef structure that contains
+  *         the configuration information for the specified TSC.
+  * @retval HAL state
+  */
+HAL_TSC_StateTypeDef HAL_TSC_GetState(TSC_HandleTypeDef* htsc)
+{
+  /* Check the parameters */
+  assert_param(IS_TSC_ALL_INSTANCE(htsc->Instance));
+  
+  if (htsc->State == HAL_TSC_STATE_BUSY)
+  {
+    /* Check end of acquisition flag */
+    if (__HAL_TSC_GET_FLAG(htsc, TSC_FLAG_EOA) != RESET)
+    {
+      /* Check max count error flag */
+      if (__HAL_TSC_GET_FLAG(htsc, TSC_FLAG_MCE) != RESET)
+      {
+        /* Change TSC state */
+        htsc->State = HAL_TSC_STATE_ERROR;
+      }
+      else
+      {
+        /* Change TSC state */
+        htsc->State = HAL_TSC_STATE_READY;
+      }
+    }
+  }
+  
+  /* Return TSC state */
+  return htsc->State;
+}
+
+/**
+  * @}
+  */
+
+/** @defgroup TSC_IRQ_Handler_and_Callbacks IRQ Handler and Callbacks
+ * @{
+ */   
+
+/**
+  * @brief  Handle TSC interrupt request.
+  * @param  htsc: pointer to a TSC_HandleTypeDef structure that contains
+  *         the configuration information for the specified TSC.
+  * @retval None
+  */
+void HAL_TSC_IRQHandler(TSC_HandleTypeDef* htsc)
+{
+  /* Check the parameters */
+  assert_param(IS_TSC_ALL_INSTANCE(htsc->Instance));
+
+  /* Check if the end of acquisition occurred */
+  if (__HAL_TSC_GET_FLAG(htsc, TSC_FLAG_EOA) != RESET)
+  {
+    /* Clear EOA flag */
+    __HAL_TSC_CLEAR_FLAG(htsc, TSC_FLAG_EOA);
+  }
+  
+  /* Check if max count error occurred */
+  if (__HAL_TSC_GET_FLAG(htsc, TSC_FLAG_MCE) != RESET)
+  {
+    /* Clear MCE flag */
+    __HAL_TSC_CLEAR_FLAG(htsc, TSC_FLAG_MCE);
+    /* Change TSC state */
+    htsc->State = HAL_TSC_STATE_ERROR;
+    /* Conversion completed callback */
+    HAL_TSC_ErrorCallback(htsc);
+  }
+  else
+  {
+    /* Change TSC state */
+    htsc->State = HAL_TSC_STATE_READY;
+    /* Conversion completed callback */
+    HAL_TSC_ConvCpltCallback(htsc);
+  }
+}
+
+/**
+  * @brief  Acquisition completed callback in non-blocking mode.
+  * @param  htsc: pointer to a TSC_HandleTypeDef structure that contains
+  *         the configuration information for the specified TSC.
+  * @retval None
+  */
+__weak void HAL_TSC_ConvCpltCallback(TSC_HandleTypeDef* htsc)
+{
+  /* NOTE : This function should not be modified, when the callback is needed,
+            the HAL_TSC_ConvCpltCallback could be implemented in the user file.
+   */
+}
+
+/**
+  * @brief  Error callback in non-blocking mode.
+  * @param  htsc: pointer to a TSC_HandleTypeDef structure that contains
+  *         the configuration information for the specified TSC.
+  * @retval None
+  */
+__weak void HAL_TSC_ErrorCallback(TSC_HandleTypeDef* htsc)
+{
+  /* NOTE : This function should not be modified, when the callback is needed,
+            the HAL_TSC_ErrorCallback could be implemented in the user file.
+   */
+}
+
+/**
+  * @}
+  */
+
+/**
+  * @}
+  */
+
+/* Private functions ---------------------------------------------------------*/
+/** @defgroup TSC_Private_Functions Private Functions
+  * @{
+  */
+  
+/**
+  * @brief  Utility function used to set the acquired groups mask.
+  * @param  iomask: Channels IOs mask
+  * @retval Acquired groups mask
+  */
+static uint32_t TSC_extract_groups(uint32_t iomask)
+{
+  uint32_t groups = 0;
+  uint32_t idx;
+  
+  for (idx = 0; idx < TSC_NB_OF_GROUPS; idx++)
+  {
+    if ((iomask & ((uint32_t)0x0F << (idx * 4))) != RESET)
+    {
+      groups |= ((uint32_t)1 << idx);
+    }
+  }
+  
+  return groups;
+}
+
+/**
+  * @}
+  */
+
+#endif /* HAL_TSC_MODULE_ENABLED */
+
+/**
+  * @}
+  */ 
+
+/**
+  * @}
+  */ 
+
+/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/