stm32l4xx_hal_gpio.c

00001 /**
00002   ******************************************************************************
00003   * @file    stm32l4xx_hal_gpio.c
00004   * @author  MCD Application Team
00005   * @version V1.1.0
00006   * @date    16-September-2015
00007   * @brief   GPIO HAL module driver.
00008   *          This file provides firmware functions to manage the following
00009   *          functionalities of the General Purpose Input/Output (GPIO) peripheral:
00010   *           + Initialization and de-initialization functions
00011   *           + IO operation functions
00012   *
00013   @verbatim
00014   ==============================================================================
00015                     ##### GPIO Peripheral features #####
00016   ==============================================================================
00017   [..]
00018     (+) Each port bit of the general-purpose I/O (GPIO) ports can be individually
00019         configured by software in several modes:
00020         (++) Input mode
00021         (++) Analog mode
00022         (++) Output mode
00023         (++) Alternate function mode
00024         (++) External interrupt/event lines
00025 
00026     (+) During and just after reset, the alternate functions and external interrupt
00027         lines are not active and the I/O ports are configured in input floating mode.
00028 
00029     (+) All GPIO pins have weak internal pull-up and pull-down resistors, which can be
00030         activated or not.
00031 
00032     (+) In Output or Alternate mode, each IO can be configured on open-drain or push-pull
00033         type and the IO speed can be selected depending on the VDD value.
00034 
00035     (+) The microcontroller IO pins are connected to onboard peripherals/modules through a
00036         multiplexer that allows only one peripheral alternate function (AF) connected
00037        to an IO pin at a time. In this way, there can be no conflict between peripherals
00038        sharing the same IO pin.
00039 
00040     (+) All ports have external interrupt/event capability. To use external interrupt
00041         lines, the port must be configured in input mode. All available GPIO pins are
00042         connected to the 16 external interrupt/event lines from EXTI0 to EXTI15.
00043 
00044     (+) The external interrupt/event controller consists of up to 39 edge detectors
00045         (16 lines are connected to GPIO) for generating event/interrupt requests (each
00046         input line can be independently configured to select the type (interrupt or event)
00047         and the corresponding trigger event (rising or falling or both). Each line can
00048         also be masked independently.
00049 
00050                      ##### How to use this driver #####
00051   ==============================================================================
00052   [..]
00053     (#) Enable the GPIO AHB clock using the following function: __HAL_RCC_GPIOx_CLK_ENABLE().
00054 
00055     (#) Configure the GPIO pin(s) using HAL_GPIO_Init().
00056         (++) Configure the IO mode using "Mode" member from GPIO_InitTypeDef structure
00057         (++) Activate Pull-up, Pull-down resistor using "Pull" member from GPIO_InitTypeDef
00058              structure.
00059         (++) In case of Output or alternate function mode selection: the speed is
00060              configured through "Speed" member from GPIO_InitTypeDef structure.
00061         (++) In alternate mode is selection, the alternate function connected to the IO
00062              is configured through "Alternate" member from GPIO_InitTypeDef structure.
00063         (++) Analog mode is required when a pin is to be used as ADC channel
00064              or DAC output.
00065         (++) In case of external interrupt/event selection the "Mode" member from
00066              GPIO_InitTypeDef structure select the type (interrupt or event) and
00067              the corresponding trigger event (rising or falling or both).
00068 
00069     (#) In case of external interrupt/event mode selection, configure NVIC IRQ priority
00070         mapped to the EXTI line using HAL_NVIC_SetPriority() and enable it using
00071         HAL_NVIC_EnableIRQ().
00072 
00073     (#) To get the level of a pin configured in input mode use HAL_GPIO_ReadPin().
00074 
00075     (#) To set/reset the level of a pin configured in output mode use
00076         HAL_GPIO_WritePin()/HAL_GPIO_TogglePin().
00077 
00078    (#) To lock pin configuration until next reset use HAL_GPIO_LockPin().
00079   
00080     (#) During and just after reset, the alternate functions are not
00081         active and the GPIO pins are configured in input floating mode (except JTAG
00082         pins).
00083 
00084     (#) The LSE oscillator pins OSC32_IN and OSC32_OUT can be used as general purpose
00085         (PC14 and PC15, respectively) when the LSE oscillator is off. The LSE has
00086         priority over the GPIO function.
00087 
00088     (#) The HSE oscillator pins OSC_IN/OSC_OUT can be used as
00089         general purpose PH0 and PH1, respectively, when the HSE oscillator is off.
00090         The HSE has priority over the GPIO function.
00091 
00092   @endverbatim
00093   ******************************************************************************
00094   * @attention
00095   *
00096   * <h2><center>&copy; COPYRIGHT(c) 2015 STMicroelectronics</center></h2>
00097   *
00098   * Redistribution and use in source and binary forms, with or without modification,
00099   * are permitted provided that the following conditions are met:
00100   *   1. Redistributions of source code must retain the above copyright notice,
00101   *      this list of conditions and the following disclaimer.
00102   *   2. Redistributions in binary form must reproduce the above copyright notice,
00103   *      this list of conditions and the following disclaimer in the documentation
00104   *      and/or other materials provided with the distribution.
00105   *   3. Neither the name of STMicroelectronics nor the names of its contributors
00106   *      may be used to endorse or promote products derived from this software
00107   *      without specific prior written permission.
00108   *
00109   * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
00110   * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
00111   * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
00112   * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
00113   * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
00114   * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
00115   * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
00116   * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
00117   * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
00118   * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
00119   *
00120   ******************************************************************************
00121   */
00122 
00123 /* Includes ------------------------------------------------------------------*/
00124 #include "stm32l4xx_hal.h"
00125 
00126 /** @addtogroup STM32L4xx_HAL_Driver
00127   * @{
00128   */
00129 
00130 /** @defgroup GPIO GPIO
00131   * @brief GPIO HAL module driver
00132   * @{
00133   */
00134 
00135 #ifdef HAL_GPIO_MODULE_ENABLED
00136 
00137 /* Private typedef -----------------------------------------------------------*/
00138 /* Private defines -----------------------------------------------------------*/
00139 /** @defgroup GPIO_Private_Defines GPIO Private Defines
00140   * @{
00141   */
00142 #define GPIO_MODE             ((uint32_t)0x00000003)
00143 #define ANALOG_MODE           ((uint32_t)0x00000008)
00144 #define EXTI_MODE             ((uint32_t)0x10000000)
00145 #define GPIO_MODE_IT          ((uint32_t)0x00010000)
00146 #define GPIO_MODE_EVT         ((uint32_t)0x00020000)
00147 #define RISING_EDGE           ((uint32_t)0x00100000)
00148 #define FALLING_EDGE          ((uint32_t)0x00200000)
00149 #define GPIO_OUTPUT_TYPE      ((uint32_t)0x00000010)
00150 
00151 #define GPIO_NUMBER           ((uint32_t)16)
00152 /**
00153   * @}
00154   */
00155   
00156 /* Private macros ------------------------------------------------------------*/
00157 /* Private macros ------------------------------------------------------------*/
00158 /** @defgroup GPIO_Private_Macros GPIO Private Macros
00159   * @{
00160   */
00161 /**
00162   * @}
00163   */
00164 /* Private variables ---------------------------------------------------------*/
00165 /* Private function prototypes -----------------------------------------------*/
00166 /* Exported functions --------------------------------------------------------*/
00167 
00168 /** @defgroup GPIO_Exported_Functions GPIO Exported Functions
00169   * @{
00170   */
00171 
00172 /** @defgroup GPIO_Exported_Functions_Group1 Initialization/de-initialization functions 
00173  *  @brief    Initialization and Configuration functions
00174  *
00175 @verbatim
00176  ===============================================================================
00177               ##### Initialization and de-initialization functions #####
00178  ===============================================================================
00179 
00180 @endverbatim
00181   * @{
00182   */
00183 
00184 /**
00185   * @brief  Initialize the GPIOx peripheral according to the specified parameters in the GPIO_Init.
00186   * @param  GPIOx: where x can be (A..H) to select the GPIO peripheral for STM32L4 family
00187   * @param  GPIO_Init: pointer to a GPIO_InitTypeDef structure that contains
00188   *         the configuration information for the specified GPIO peripheral.
00189   * @retval None
00190   */
00191 void HAL_GPIO_Init(GPIO_TypeDef  *GPIOx, GPIO_InitTypeDef *GPIO_Init)
00192 {
00193   uint32_t position = 0x00;
00194   uint32_t iocurrent = 0x00;
00195   uint32_t temp = 0x00;
00196 
00197   /* Check the parameters */
00198   assert_param(IS_GPIO_ALL_INSTANCE(GPIOx));
00199   assert_param(IS_GPIO_PIN(GPIO_Init->Pin));
00200   assert_param(IS_GPIO_MODE(GPIO_Init->Mode));
00201   assert_param(IS_GPIO_PULL(GPIO_Init->Pull));
00202 
00203   /* Configure the port pins */
00204   while (((GPIO_Init->Pin) >> position) != RESET)
00205   {
00206     /* Get current io position */
00207     iocurrent = (GPIO_Init->Pin) & (1U << position);
00208 
00209     if(iocurrent)
00210     {
00211       /*--------------------- GPIO Mode Configuration ------------------------*/
00212       /* In case of Alternate function mode selection */
00213       if((GPIO_Init->Mode == GPIO_MODE_AF_PP) || (GPIO_Init->Mode == GPIO_MODE_AF_OD))
00214       {
00215         /* Check the Alternate function parameters */
00216         assert_param(IS_GPIO_AF_INSTANCE(GPIOx));
00217         assert_param(IS_GPIO_AF(GPIO_Init->Alternate));
00218         
00219         /* Configure Alternate function mapped with the current IO */
00220         temp = GPIOx->AFR[position >> 3];
00221         temp &= ~((uint32_t)0xF << ((uint32_t)(position & (uint32_t)0x07) * 4)) ;
00222         temp |= ((uint32_t)(GPIO_Init->Alternate) << (((uint32_t)position & (uint32_t)0x07) * 4));
00223         GPIOx->AFR[position >> 3] = temp;
00224       }
00225 
00226       /* Configure IO Direction mode (Input, Output, Alternate or Analog) */
00227       temp = GPIOx->MODER;
00228       temp &= ~(GPIO_MODER_MODER0 << (position * 2));
00229       temp |= ((GPIO_Init->Mode & GPIO_MODE) << (position * 2));
00230       GPIOx->MODER = temp;
00231 
00232       /* In case of Output or Alternate function mode selection */
00233       if((GPIO_Init->Mode == GPIO_MODE_OUTPUT_PP) || (GPIO_Init->Mode == GPIO_MODE_AF_PP) ||
00234          (GPIO_Init->Mode == GPIO_MODE_OUTPUT_OD) || (GPIO_Init->Mode == GPIO_MODE_AF_OD))
00235       {
00236         /* Check the Speed parameter */
00237         assert_param(IS_GPIO_SPEED(GPIO_Init->Speed));
00238         /* Configure the IO Speed */
00239         temp = GPIOx->OSPEEDR;
00240         temp &= ~(GPIO_OSPEEDER_OSPEEDR0 << (position * 2));
00241         temp |= (GPIO_Init->Speed << (position * 2));
00242         GPIOx->OSPEEDR = temp;
00243 
00244         /* Configure the IO Output Type */
00245         temp = GPIOx->OTYPER;
00246         temp &= ~(GPIO_OTYPER_OT_0 << position) ;
00247         temp |= (((GPIO_Init->Mode & GPIO_OUTPUT_TYPE) >> 4) << position);
00248         GPIOx->OTYPER = temp;
00249       }
00250 
00251       /* In case of Analog mode, check if ADC control mode is selected */
00252       if((GPIO_Init->Mode & GPIO_MODE_ANALOG) == GPIO_MODE_ANALOG)
00253       {
00254         /* Configure the IO Output Type */
00255         temp = GPIOx->ASCR;
00256         temp &= ~(GPIO_ASCR_EN_0 << position) ;
00257         temp |= (((GPIO_Init->Mode & ANALOG_MODE) >> 3) << position);
00258         GPIOx->ASCR = temp;
00259       }
00260 
00261       /* Activate the Pull-up or Pull down resistor for the current IO */
00262       temp = GPIOx->PUPDR;
00263       temp &= ~(GPIO_PUPDR_PUPDR0 << (position * 2));
00264       temp |= ((GPIO_Init->Pull) << (position * 2));
00265       GPIOx->PUPDR = temp;
00266 
00267       /*--------------------- EXTI Mode Configuration ------------------------*/
00268       /* Configure the External Interrupt or event for the current IO */
00269       if((GPIO_Init->Mode & EXTI_MODE) == EXTI_MODE)
00270       {
00271         /* Enable SYSCFG Clock */
00272         __HAL_RCC_SYSCFG_CLK_ENABLE();
00273 
00274         temp = SYSCFG->EXTICR[position >> 2];
00275         temp &= ~(((uint32_t)0x0F) << (4 * (position & 0x03)));
00276         temp |= (GPIO_GET_INDEX(GPIOx) << (4 * (position & 0x03)));
00277         SYSCFG->EXTICR[position >> 2] = temp;
00278 
00279         /* Clear EXTI line configuration */
00280         temp = EXTI->IMR1;
00281         temp &= ~((uint32_t)iocurrent);
00282         if((GPIO_Init->Mode & GPIO_MODE_IT) == GPIO_MODE_IT)
00283         {
00284           temp |= iocurrent;
00285         }
00286         EXTI->IMR1 = temp;
00287 
00288         temp = EXTI->EMR1;
00289         temp &= ~((uint32_t)iocurrent);
00290         if((GPIO_Init->Mode & GPIO_MODE_EVT) == GPIO_MODE_EVT)
00291         {
00292           temp |= iocurrent;
00293         }
00294         EXTI->EMR1 = temp;
00295 
00296         /* Clear Rising Falling edge configuration */
00297         temp = EXTI->RTSR1;
00298         temp &= ~((uint32_t)iocurrent);
00299         if((GPIO_Init->Mode & RISING_EDGE) == RISING_EDGE)
00300         {
00301           temp |= iocurrent;
00302         }
00303         EXTI->RTSR1 = temp;
00304 
00305         temp = EXTI->FTSR1;
00306         temp &= ~((uint32_t)iocurrent);
00307         if((GPIO_Init->Mode & FALLING_EDGE) == FALLING_EDGE)
00308         {
00309           temp |= iocurrent;
00310         }
00311         EXTI->FTSR1 = temp;
00312       }
00313     }
00314     
00315     position++;
00316   }
00317 }
00318 
00319 /**
00320   * @brief  De-initialize the GPIOx peripheral registers to their default reset values.
00321   * @param  GPIOx: where x can be (A..H) to select the GPIO peripheral for STM32L4 family
00322   * @param  GPIO_Pin: specifies the port bit to be written.
00323   *         This parameter can be one of GPIO_PIN_x where x can be (0..15).
00324   * @retval None
00325   */
00326 void HAL_GPIO_DeInit(GPIO_TypeDef  *GPIOx, uint32_t GPIO_Pin)
00327 {
00328   uint32_t position = 0x00;
00329   uint32_t iocurrent = 0x00;
00330   uint32_t tmp = 0x00;
00331 
00332   /* Check the parameters */
00333   assert_param(IS_GPIO_ALL_INSTANCE(GPIOx));
00334   assert_param(IS_GPIO_PIN(GPIO_Pin));
00335 
00336   /* Configure the port pins */
00337   while ((GPIO_Pin >> position) != RESET)
00338   {
00339     /* Get current io position */
00340     iocurrent = (GPIO_Pin) & (1U << position);
00341 
00342     if (iocurrent)
00343     {
00344       /*------------------------- GPIO Mode Configuration --------------------*/
00345       /* Configure IO in Analog Mode */
00346       GPIOx->MODER |= (GPIO_MODER_MODER0 << (position * 2));
00347 
00348       /* Configure the default Alternate Function in current IO */
00349       GPIOx->AFR[position >> 3] &= ~((uint32_t)0xF << ((uint32_t)(position & (uint32_t)0x07) * 4)) ;
00350 
00351       /* Configure the default value for IO Speed */
00352       GPIOx->OSPEEDR &= ~(GPIO_OSPEEDER_OSPEEDR0 << (position * 2));
00353 
00354       /* Configure the default value IO Output Type */
00355       GPIOx->OTYPER  &= ~(GPIO_OTYPER_OT_0 << position) ;
00356 
00357       /* Deactivate the Pull-up and Pull-down resistor for the current IO */
00358       GPIOx->PUPDR &= ~(GPIO_PUPDR_PUPDR0 << (position * 2));
00359 
00360       /* Deactivate the Control bit of Analog mode for the current IO */
00361       GPIOx->ASCR &= ~(GPIO_ASCR_EN_0<< position);
00362 
00363       /*------------------------- EXTI Mode Configuration --------------------*/
00364       /* Clear the External Interrupt or Event for the current IO */
00365       
00366       tmp = SYSCFG->EXTICR[position >> 2];
00367       tmp &= (((uint32_t)0x0F) << (4 * (position & 0x03)));
00368       if(tmp == (GPIO_GET_INDEX(GPIOx) << (4 * (position & 0x03))))
00369       {
00370         tmp = ((uint32_t)0x0F) << (4 * (position & 0x03));
00371         SYSCFG->EXTICR[position >> 2] &= ~tmp;
00372 
00373         /* Clear EXTI line configuration */
00374         EXTI->IMR1 &= ~((uint32_t)iocurrent);
00375         EXTI->EMR1 &= ~((uint32_t)iocurrent);
00376 
00377         /* Clear Rising Falling edge configuration */
00378         EXTI->RTSR1 &= ~((uint32_t)iocurrent);
00379         EXTI->FTSR1 &= ~((uint32_t)iocurrent);
00380       }
00381     }
00382     
00383     position++;
00384   }
00385 }
00386 
00387 /**
00388   * @}
00389   */
00390 
00391 /** @defgroup GPIO_Exported_Functions_Group2 IO operation functions 
00392  *  @brief GPIO Read, Write, Toggle, Lock and EXTI management functions.
00393  *
00394 @verbatim
00395  ===============================================================================
00396                        ##### IO operation functions #####
00397  ===============================================================================
00398 
00399 @endverbatim
00400   * @{
00401   */
00402 
00403 /**
00404   * @brief  Read the specified input port pin.
00405   * @param  GPIOx: where x can be (A..H) to select the GPIO peripheral for STM32L4 family
00406   * @param  GPIO_Pin: specifies the port bit to read.
00407   *         This parameter can be GPIO_PIN_x where x can be (0..15).
00408   * @retval The input port pin value.
00409   */
00410 GPIO_PinState HAL_GPIO_ReadPin(GPIO_TypeDef* GPIOx, uint16_t GPIO_Pin)
00411 {
00412   GPIO_PinState bitstatus;
00413 
00414   /* Check the parameters */
00415   assert_param(IS_GPIO_PIN(GPIO_Pin));
00416 
00417   if((GPIOx->IDR & GPIO_Pin) != (uint32_t)GPIO_PIN_RESET)
00418   {
00419     bitstatus = GPIO_PIN_SET;
00420   }
00421   else
00422   {
00423     bitstatus = GPIO_PIN_RESET;
00424   }
00425   return bitstatus;
00426 }
00427 
00428 /**
00429   * @brief  Set or clear the selected data port bit.
00430   *
00431   * @note   This function uses GPIOx_BSRR and GPIOx_BRR registers to allow atomic read/modify
00432   *         accesses. In this way, there is no risk of an IRQ occurring between
00433   *         the read and the modify access.
00434   *
00435   * @param  GPIOx: where x can be (A..H) to select the GPIO peripheral for STM32L4 family
00436   * @param  GPIO_Pin: specifies the port bit to be written.
00437   *         This parameter can be one of GPIO_PIN_x where x can be (0..15).
00438   * @param  PinState: specifies the value to be written to the selected bit.
00439   *         This parameter can be one of the GPIO_PinState enum values:
00440   *            @arg GPIO_PIN_RESET: to clear the port pin
00441   *            @arg GPIO_PIN_SET: to set the port pin
00442   * @retval None
00443   */
00444 void HAL_GPIO_WritePin(GPIO_TypeDef* GPIOx, uint16_t GPIO_Pin, GPIO_PinState PinState)
00445 {
00446   /* Check the parameters */
00447   assert_param(IS_GPIO_PIN(GPIO_Pin));
00448   assert_param(IS_GPIO_PIN_ACTION(PinState));
00449 
00450   if(PinState != GPIO_PIN_RESET)
00451   {
00452     GPIOx->BSRR = (uint32_t)GPIO_Pin;
00453   }
00454   else
00455   {
00456     GPIOx->BRR = (uint32_t)GPIO_Pin;
00457   }
00458 }
00459 
00460 /**
00461   * @brief  Toggle the specified GPIO pin.
00462   * @param  GPIOx: where x can be (A..H) to select the GPIO peripheral for STM32L4 family
00463   * @param  GPIO_Pin: specifies the pin to be toggled.
00464   * @retval None
00465   */
00466 void HAL_GPIO_TogglePin(GPIO_TypeDef* GPIOx, uint16_t GPIO_Pin)
00467 {
00468   /* Check the parameters */
00469   assert_param(IS_GPIO_PIN(GPIO_Pin));
00470 
00471   GPIOx->ODR ^= GPIO_Pin;
00472 }
00473 
00474 /**
00475 * @brief  Lock GPIO Pins configuration registers.
00476   * @note   The locked registers are GPIOx_MODER, GPIOx_OTYPER, GPIOx_OSPEEDR,
00477   *         GPIOx_PUPDR, GPIOx_AFRL and GPIOx_AFRH.
00478   * @note   The configuration of the locked GPIO pins can no longer be modified
00479   *         until the next reset.
00480   * @param  GPIOx: where x can be (A..H) to select the GPIO peripheral for STM32L4 family
00481   * @param  GPIO_Pin: specifies the port bits to be locked.
00482   *         This parameter can be any combination of GPIO_Pin_x where x can be (0..15).
00483   * @retval None
00484   */
00485 HAL_StatusTypeDef HAL_GPIO_LockPin(GPIO_TypeDef* GPIOx, uint16_t GPIO_Pin)
00486 {
00487   __IO uint32_t tmp = GPIO_LCKR_LCKK;
00488 
00489   /* Check the parameters */
00490   assert_param(IS_GPIO_LOCK_INSTANCE(GPIOx));
00491   assert_param(IS_GPIO_PIN(GPIO_Pin));
00492 
00493   /* Apply lock key write sequence */
00494   tmp |= GPIO_Pin;
00495   /* Set LCKx bit(s): LCKK='1' + LCK[15-0] */
00496   GPIOx->LCKR = tmp;
00497   /* Reset LCKx bit(s): LCKK='0' + LCK[15-0] */
00498   GPIOx->LCKR = GPIO_Pin;
00499   /* Set LCKx bit(s): LCKK='1' + LCK[15-0] */
00500   GPIOx->LCKR = tmp;
00501   /* Read LCKK bit*/
00502   tmp = GPIOx->LCKR;
00503 
00504   if((GPIOx->LCKR & GPIO_LCKR_LCKK) != RESET)
00505   {
00506     return HAL_OK;
00507   }
00508   else
00509   {
00510     return HAL_ERROR;
00511   }
00512 }
00513 
00514 /**
00515   * @brief  Handle EXTI interrupt request.
00516   * @param  GPIO_Pin: Specifies the port pin connected to corresponding EXTI line.
00517   * @retval None
00518   */
00519 void HAL_GPIO_EXTI_IRQHandler(uint16_t GPIO_Pin)
00520 {
00521   /* EXTI line interrupt detected */
00522   if(__HAL_GPIO_EXTI_GET_IT(GPIO_Pin) != RESET)
00523   {
00524     __HAL_GPIO_EXTI_CLEAR_IT(GPIO_Pin);
00525     HAL_GPIO_EXTI_Callback(GPIO_Pin);
00526   }
00527 }
00528 
00529 /**
00530   * @brief  EXTI line detection callback.
00531   * @param  GPIO_Pin: Specifies the port pin connected to corresponding EXTI line.
00532   * @retval None
00533   */
00534 __weak void HAL_GPIO_EXTI_Callback(uint16_t GPIO_Pin)
00535 {
00536   /* NOTE: This function should not be modified, when the callback is needed,
00537            the HAL_GPIO_EXTI_Callback could be implemented in the user file
00538    */
00539 }
00540 
00541 /**
00542   * @}
00543   */
00544 
00545 
00546 /**
00547   * @}
00548   */
00549 
00550 #endif /* HAL_GPIO_MODULE_ENABLED */
00551 /**
00552   * @}
00553   */
00554 
00555 /**
00556   * @}
00557   */
00558 
00559 /************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/
00560