/** | |
****************************************************************************** | |
* @file stm32l4xx_hal_tsc.c | |
* @author MCD Application Team | |
* @version V1.7.1 | |
* @date 21-April-2017 | |
* @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. | |
(#) 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. | |
[..] 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 | |
****************************************************************************** | |
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) | | | |
+--------------------------------+ | |
****************************************************************************** | |
* @attention | |
* | |
* <h2><center>© COPYRIGHT(c) 2017 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.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) | |
{ | |
/* Prevent unused argument(s) compilation warning */ | |
UNUSED(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) | |
{ | |
/* Prevent unused argument(s) compilation warning */ | |
UNUSED(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)); | |
/* Set touch sensing IOs not acquired to the specified IODefaultMode */ | |
if (htsc->Init.IODefaultMode == TSC_IODEF_OUT_PP_LOW) | |
{ | |
__HAL_TSC_SET_IODEF_OUTPPLOW(htsc); | |
} | |
else | |
{ | |
__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)); | |
/* Set touch sensing IOs not acquired to the specified IODefaultMode */ | |
if (htsc->Init.IODefaultMode == TSC_IODEF_OUT_PP_LOW) | |
{ | |
__HAL_TSC_SET_IODEF_OUTPPLOW(htsc); | |
} | |
else | |
{ | |
__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); | |
/* Set touch sensing IOs in low power mode (output push-pull) */ | |
__HAL_TSC_SET_IODEF_OUTPPLOW(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); | |
/* Set touch sensing IOs in low power mode (output push-pull) */ | |
__HAL_TSC_SET_IODEF_OUTPPLOW(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) | |
{ | |
/* Prevent unused argument(s) compilation warning */ | |
UNUSED(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) | |
{ | |
/* Prevent unused argument(s) compilation warning */ | |
UNUSED(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****/ |