lib/main/STM32F7/Drivers/STM32F7xx_HAL_Driver/Src/stm32f7xx_ll_exti.c

   1 /**
   2   ******************************************************************************
   3   * @file    stm32f7xx_ll_exti.c
   4   * @author  MCD Application Team
   5   * @version V1.2.2
   6   * @date    14-April-2017
   7   * @brief   EXTI LL module driver.
   8   ******************************************************************************
   9   * @attention
  10   *
  11   * <h2><center>&copy; COPYRIGHT(c) 2017 STMicroelectronics</center></h2>
  12   *
  13   * Redistribution and use in source and binary forms, with or without modification,
  14   * are permitted provided that the following conditions are met:
  15   *   1. Redistributions of source code must retain the above copyright notice,
  16   *      this list of conditions and the following disclaimer.
  17   *   2. Redistributions in binary form must reproduce the above copyright notice,
  18   *      this list of conditions and the following disclaimer in the documentation
  19   *      and/or other materials provided with the distribution.
  20   *   3. Neither the name of STMicroelectronics nor the names of its contributors
  21   *      may be used to endorse or promote products derived from this software
  22   *      without specific prior written permission.
  23   *
  24   * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
  25   * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  26   * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
  27   * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
  28   * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  29   * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
  30   * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
  31   * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
  32   * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  33   * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  34   *
  35   ******************************************************************************
  36   */
  37 #if defined(USE_FULL_LL_DRIVER)
  38
  39 /* Includes ------------------------------------------------------------------*/
  40 #include "stm32f7xx_ll_exti.h"
  41 #ifdef  USE_FULL_ASSERT
  42 #include "stm32_assert.h"
  43 #else
  44 #define assert_param(expr) ((void)0U)
  45 #endif
  46
  47 /** @addtogroup STM32F7xx_LL_Driver
  48   * @{
  49   */
  50
  51 #if defined (EXTI)
  52
  53 /** @defgroup EXTI_LL EXTI
  54   * @{
  55   */
  56
  57 /* Private types -------------------------------------------------------------*/
  58 /* Private variables ---------------------------------------------------------*/
  59 /* Private constants ---------------------------------------------------------*/
  60 /* Private macros ------------------------------------------------------------*/
  61 /** @addtogroup EXTI_LL_Private_Macros
  62   * @{
  63   */
  64
  65 #define IS_LL_EXTI_LINE_0_31(__VALUE__)              (((__VALUE__) & ~LL_EXTI_LINE_ALL_0_31) == 0x00000000U)
  66
  67 #define IS_LL_EXTI_MODE(__VALUE__)                   (((__VALUE__) == LL_EXTI_MODE_IT)            \
  68                                                    || ((__VALUE__) == LL_EXTI_MODE_EVENT)         \
  69                                                    || ((__VALUE__) == LL_EXTI_MODE_IT_EVENT))
  70
  71
  72 #define IS_LL_EXTI_TRIGGER(__VALUE__)                (((__VALUE__) == LL_EXTI_TRIGGER_NONE)       \
  73                                                    || ((__VALUE__) == LL_EXTI_TRIGGER_RISING)     \
  74                                                    || ((__VALUE__) == LL_EXTI_TRIGGER_FALLING)    \
  75                                                    || ((__VALUE__) == LL_EXTI_TRIGGER_RISING_FALLING))
  76
  77 /**
  78   * @}
  79   */
  80
  81 /* Private function prototypes -----------------------------------------------*/
  82
  83 /* Exported functions --------------------------------------------------------*/
  84 /** @addtogroup EXTI_LL_Exported_Functions
  85   * @{
  86   */
  87
  88 /** @addtogroup EXTI_LL_EF_Init
  89   * @{
  90   */
  91
  92 /**
  93   * @brief  De-initialize the EXTI registers to their default reset values.
  94   * @retval An ErrorStatus enumeration value:
  95   *          - SUCCESS: EXTI registers are de-initialized
  96   *          - ERROR: not applicable
  97   */
  98 uint32_t LL_EXTI_DeInit(void)
  99 {
 100   /* Interrupt mask register set to default reset values */
 101   LL_EXTI_WriteReg(IMR,   0x00000000U);
 102   /* Event mask register set to default reset values */
 103   LL_EXTI_WriteReg(EMR,   0x00000000U);
 104   /* Rising Trigger selection register set to default reset values */
 105   LL_EXTI_WriteReg(RTSR,  0x00000000U);
 106   /* Falling Trigger selection register set to default reset values */
 107   LL_EXTI_WriteReg(FTSR,  0x00000000U);
 108   /* Software interrupt event register set to default reset values */
 109   LL_EXTI_WriteReg(SWIER, 0x00000000U);
 110   /* Pending register set to default reset values */
 111   LL_EXTI_WriteReg(PR,    0x01FFFFFFU);
 112
 113   return SUCCESS;
 114 }
 115
 116 /**
 117   * @brief  Initialize the EXTI registers according to the specified parameters in EXTI_InitStruct.
 118   * @param  EXTI_InitStruct pointer to a @ref LL_EXTI_InitTypeDef structure.
 119   * @retval An ErrorStatus enumeration value:
 120   *          - SUCCESS: EXTI registers are initialized
 121   *          - ERROR: not applicable
 122   */
 123 uint32_t LL_EXTI_Init(LL_EXTI_InitTypeDef *EXTI_InitStruct)
 124 {
 125   ErrorStatus status = SUCCESS;
 126   /* Check the parameters */
 127   assert_param(IS_LL_EXTI_LINE_0_31(EXTI_InitStruct->Line_0_31));
 128   assert_param(IS_FUNCTIONAL_STATE(EXTI_InitStruct->LineCommand));
 129   assert_param(IS_LL_EXTI_MODE(EXTI_InitStruct->Mode));
 130
 131   /* ENABLE LineCommand */
 132   if (EXTI_InitStruct->LineCommand != DISABLE)
 133   {
 134     assert_param(IS_LL_EXTI_TRIGGER(EXTI_InitStruct->Trigger));
 135
 136     /* Configure EXTI Lines in range from 0 to 31 */
 137     if (EXTI_InitStruct->Line_0_31 != LL_EXTI_LINE_NONE)
 138     {
 139       switch (EXTI_InitStruct->Mode)
 140       {
 141         case LL_EXTI_MODE_IT:
 142           /* First Disable Event on provided Lines */
 143           LL_EXTI_DisableEvent_0_31(EXTI_InitStruct->Line_0_31);
 144           /* Then Enable IT on provided Lines */
 145           LL_EXTI_EnableIT_0_31(EXTI_InitStruct->Line_0_31);
 146           break;
 147         case LL_EXTI_MODE_EVENT:
 148           /* First Disable IT on provided Lines */
 149           LL_EXTI_DisableIT_0_31(EXTI_InitStruct->Line_0_31);
 150           /* Then Enable Event on provided Lines */
 151           LL_EXTI_EnableEvent_0_31(EXTI_InitStruct->Line_0_31);
 152           break;
 153         case LL_EXTI_MODE_IT_EVENT:
 154           /* Directly Enable IT & Event on provided Lines */
 155           LL_EXTI_EnableIT_0_31(EXTI_InitStruct->Line_0_31);
 156           LL_EXTI_EnableEvent_0_31(EXTI_InitStruct->Line_0_31);
 157           break;
 158         default:
 159           status = ERROR;
 160           break;
 161       }
 162       if (EXTI_InitStruct->Trigger != LL_EXTI_TRIGGER_NONE)
 163       {
 164         switch (EXTI_InitStruct->Trigger)
 165         {
 166           case LL_EXTI_TRIGGER_RISING:
 167             /* First Disable Falling Trigger on provided Lines */
 168             LL_EXTI_DisableFallingTrig_0_31(EXTI_InitStruct->Line_0_31);
 169             /* Then Enable Rising Trigger on provided Lines */
 170             LL_EXTI_EnableRisingTrig_0_31(EXTI_InitStruct->Line_0_31);
 171             break;
 172           case LL_EXTI_TRIGGER_FALLING:
 173             /* First Disable Rising Trigger on provided Lines */
 174             LL_EXTI_DisableRisingTrig_0_31(EXTI_InitStruct->Line_0_31);
 175             /* Then Enable Falling Trigger on provided Lines */
 176             LL_EXTI_EnableFallingTrig_0_31(EXTI_InitStruct->Line_0_31);
 177             break;
 178           case LL_EXTI_TRIGGER_RISING_FALLING:
 179             LL_EXTI_EnableRisingTrig_0_31(EXTI_InitStruct->Line_0_31);
 180             LL_EXTI_EnableFallingTrig_0_31(EXTI_InitStruct->Line_0_31);
 181             break;
 182           default:
 183             status = ERROR;
 184             break;
 185         }
 186       }
 187     }
 188   }
 189   /* DISABLE LineCommand */
 190   else
 191   {
 192     /* De-configure EXTI Lines in range from 0 to 31 */
 193     LL_EXTI_DisableIT_0_31(EXTI_InitStruct->Line_0_31);
 194     LL_EXTI_DisableEvent_0_31(EXTI_InitStruct->Line_0_31);
 195   }
 196   return status;
 197 }
 198
 199 /**
 200   * @brief  Set each @ref LL_EXTI_InitTypeDef field to default value.
 201   * @param  EXTI_InitStruct Pointer to a @ref LL_EXTI_InitTypeDef structure.
 202   * @retval None
 203   */
 204 void LL_EXTI_StructInit(LL_EXTI_InitTypeDef *EXTI_InitStruct)
 205 {
 206   EXTI_InitStruct->Line_0_31      = LL_EXTI_LINE_NONE;
 207   EXTI_InitStruct->LineCommand    = DISABLE;
 208   EXTI_InitStruct->Mode           = LL_EXTI_MODE_IT;
 209   EXTI_InitStruct->Trigger        = LL_EXTI_TRIGGER_FALLING;
 210 }
 211
 212 /**
 213   * @}
 214   */
 215
 216 /**
 217   * @}
 218   */
 219
 220 /**
 221   * @}
 222   */
 223
 224 #endif /* defined (EXTI) */
 225
 226 /**
 227   * @}
 228   */
 229
 230 #endif /* USE_FULL_LL_DRIVER */
 231
 232 /************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/