lib/main/STM32G4/Drivers/STM32G4xx_HAL_Driver/Src/stm32g4xx_ll_exti.c

   1 /**
   2   ******************************************************************************
   3   * @file    stm32g4xx_ll_exti.c
   4   * @author  MCD Application Team
   5   * @brief   EXTI LL module driver.
   6   ******************************************************************************
   7   * @attention
   8   *
   9   * <h2><center>&copy; Copyright (c) 2017 STMicroelectronics.
  10   * All rights reserved.</center></h2>
  11   *
  12   * This software component is licensed by ST under BSD 3-Clause license,
  13   * the "License"; You may not use this file except in compliance with the
  14   * License. You may obtain a copy of the License at:
  15   *                        opensource.org/licenses/BSD-3-Clause
  16   *
  17   ******************************************************************************
  18   */
  19 #if defined(USE_FULL_LL_DRIVER)
  20
  21 /* Includes ------------------------------------------------------------------*/
  22 #include "stm32g4xx_ll_exti.h"
  23 #ifdef  USE_FULL_ASSERT
  24 #include "stm32_assert.h"
  25 #else
  26 #define assert_param(expr) ((void)0U)
  27 #endif /* USE_FULL_ASSERT */
  28
  29 /** @addtogroup STM32G4xx_LL_Driver
  30   * @{
  31   */
  32
  33 #if defined (EXTI)
  34
  35 /** @defgroup EXTI_LL EXTI
  36   * @{
  37   */
  38
  39 /* Private types -------------------------------------------------------------*/
  40 /* Private variables ---------------------------------------------------------*/
  41 /* Private constants ---------------------------------------------------------*/
  42 /* Private macros ------------------------------------------------------------*/
  43 /** @addtogroup EXTI_LL_Private_Macros
  44   * @{
  45   */
  46
  47 #define IS_LL_EXTI_LINE_0_31(__VALUE__)              (((__VALUE__) & ~LL_EXTI_LINE_ALL_0_31) == 0x00000000U)
  48 #define IS_LL_EXTI_LINE_32_63(__VALUE__)             (((__VALUE__) & ~LL_EXTI_LINE_ALL_32_63) == 0x00000000U)
  49
  50 #define IS_LL_EXTI_MODE(__VALUE__)                   (((__VALUE__) == LL_EXTI_MODE_IT)            \
  51                                                       || ((__VALUE__) == LL_EXTI_MODE_EVENT)         \
  52                                                       || ((__VALUE__) == LL_EXTI_MODE_IT_EVENT))
  53
  54
  55 #define IS_LL_EXTI_TRIGGER(__VALUE__)                (((__VALUE__) == LL_EXTI_TRIGGER_NONE)       \
  56                                                       || ((__VALUE__) == LL_EXTI_TRIGGER_RISING)     \
  57                                                       || ((__VALUE__) == LL_EXTI_TRIGGER_FALLING)    \
  58                                                       || ((__VALUE__) == LL_EXTI_TRIGGER_RISING_FALLING))
  59
  60 /**
  61   * @}
  62   */
  63
  64 /* Private function prototypes -----------------------------------------------*/
  65
  66 /* Exported functions --------------------------------------------------------*/
  67 /** @addtogroup EXTI_LL_Exported_Functions
  68   * @{
  69   */
  70
  71 /** @addtogroup EXTI_LL_EF_Init
  72   * @{
  73   */
  74
  75 /**
  76   * @brief  De-initialize the EXTI registers to their default reset values.
  77   * @retval An ErrorStatus enumeration value:
  78   *          - 0x00: EXTI registers are de-initialized
  79   */
  80 uint32_t LL_EXTI_DeInit(void)
  81 {
  82   /* Interrupt mask register set to default reset values */
  83   LL_EXTI_WriteReg(IMR1,   0x1F840000U);
  84   /* Event mask register set to default reset values */
  85   LL_EXTI_WriteReg(EMR1,   0x00000000U);
  86   /* Rising Trigger selection register set to default reset values */
  87   LL_EXTI_WriteReg(RTSR1,  0x00000000U);
  88   /* Falling Trigger selection register set to default reset values */
  89   LL_EXTI_WriteReg(FTSR1,  0x00000000U);
  90   /* Software interrupt event register set to default reset values */
  91   LL_EXTI_WriteReg(SWIER1, 0x00000000U);
  92   /* Pending register clear */
  93   LL_EXTI_WriteReg(PR1,    0x007DFFFFU);
  94
  95   /* Interrupt mask register 2 set to default reset values */
  96 #if defined(LL_EXTI_LINE_32) && defined(LL_EXTI_LINE_33) && defined(LL_EXTI_LINE_35) && defined(LL_EXTI_LINE_42)
  97   LL_EXTI_WriteReg(IMR2,        0x0000043CU);
  98 #else
  99   LL_EXTI_WriteReg(IMR2,        0x00000034U);
 100 #endif /* LL_EXTI_LINE_xx */
 101   /* Event mask register 2 set to default reset values */
 102   LL_EXTI_WriteReg(EMR2,        0x00000000U);
 103   /* Rising Trigger selection register 2 set to default reset values */
 104   LL_EXTI_WriteReg(RTSR2,       0x00000000U);
 105   /* Falling Trigger selection register 2 set to default reset values */
 106   LL_EXTI_WriteReg(FTSR2,       0x00000000U);
 107   /* Software interrupt event register 2 set to default reset values */
 108   LL_EXTI_WriteReg(SWIER2,      0x00000000U);
 109   /* Pending register 2 clear */
 110   LL_EXTI_WriteReg(PR2,         0x00000078U);
 111
 112   return 0x00u;
 113 }
 114
 115 /**
 116   * @brief  Initialize the EXTI registers according to the specified parameters in EXTI_InitStruct.
 117   * @param  EXTI_InitStruct pointer to a @ref LL_EXTI_InitTypeDef structure.
 118   * @retval An ErrorStatus enumeration value:
 119   *          - 0x00: EXTI registers are initialized
 120   *          - any other calue : wrong configuration
 121   */
 122 uint32_t LL_EXTI_Init(LL_EXTI_InitTypeDef *EXTI_InitStruct)
 123 {
 124   uint32_t status = 0x00u;
 125
 126   /* Check the parameters */
 127   assert_param(IS_LL_EXTI_LINE_0_31(EXTI_InitStruct->Line_0_31));
 128   assert_param(IS_LL_EXTI_LINE_32_63(EXTI_InitStruct->Line_32_63));
 129   assert_param(IS_FUNCTIONAL_STATE(EXTI_InitStruct->LineCommand));
 130   assert_param(IS_LL_EXTI_MODE(EXTI_InitStruct->Mode));
 131
 132   /* ENABLE LineCommand */
 133   if (EXTI_InitStruct->LineCommand != DISABLE)
 134   {
 135     assert_param(IS_LL_EXTI_TRIGGER(EXTI_InitStruct->Trigger));
 136
 137     /* Configure EXTI Lines in range from 0 to 31 */
 138     if (EXTI_InitStruct->Line_0_31 != LL_EXTI_LINE_NONE)
 139     {
 140       switch (EXTI_InitStruct->Mode)
 141       {
 142         case LL_EXTI_MODE_IT:
 143           /* First Disable Event on provided Lines */
 144           LL_EXTI_DisableEvent_0_31(EXTI_InitStruct->Line_0_31);
 145           /* Then Enable IT on provided Lines */
 146           LL_EXTI_EnableIT_0_31(EXTI_InitStruct->Line_0_31);
 147           break;
 148         case LL_EXTI_MODE_EVENT:
 149           /* First Disable IT on provided Lines */
 150           LL_EXTI_DisableIT_0_31(EXTI_InitStruct->Line_0_31);
 151           /* Then Enable Event on provided Lines */
 152           LL_EXTI_EnableEvent_0_31(EXTI_InitStruct->Line_0_31);
 153           break;
 154         case LL_EXTI_MODE_IT_EVENT:
 155           /* Directly Enable IT on provided Lines */
 156           LL_EXTI_EnableIT_0_31(EXTI_InitStruct->Line_0_31);
 157           /* Directly Enable Event on provided Lines */
 158           LL_EXTI_EnableEvent_0_31(EXTI_InitStruct->Line_0_31);
 159           break;
 160         default:
 161           status = 0x01u;
 162           break;
 163       }
 164       if (EXTI_InitStruct->Trigger != LL_EXTI_TRIGGER_NONE)
 165       {
 166         switch (EXTI_InitStruct->Trigger)
 167         {
 168           case LL_EXTI_TRIGGER_RISING:
 169             /* First Disable Falling Trigger on provided Lines */
 170             LL_EXTI_DisableFallingTrig_0_31(EXTI_InitStruct->Line_0_31);
 171             /* Then Enable Rising Trigger on provided Lines */
 172             LL_EXTI_EnableRisingTrig_0_31(EXTI_InitStruct->Line_0_31);
 173             break;
 174           case LL_EXTI_TRIGGER_FALLING:
 175             /* First Disable Rising Trigger on provided Lines */
 176             LL_EXTI_DisableRisingTrig_0_31(EXTI_InitStruct->Line_0_31);
 177             /* Then Enable Falling Trigger on provided Lines */
 178             LL_EXTI_EnableFallingTrig_0_31(EXTI_InitStruct->Line_0_31);
 179             break;
 180           case LL_EXTI_TRIGGER_RISING_FALLING:
 181             /* Enable Rising Trigger on provided Lines */
 182             LL_EXTI_EnableRisingTrig_0_31(EXTI_InitStruct->Line_0_31);
 183             /* Enable Falling Trigger on provided Lines */
 184             LL_EXTI_EnableFallingTrig_0_31(EXTI_InitStruct->Line_0_31);
 185             break;
 186           default:
 187             status |= 0x02u;
 188             break;
 189         }
 190       }
 191     }
 192     /* Configure EXTI Lines in range from 32 to 63 */
 193     if (EXTI_InitStruct->Line_32_63 != LL_EXTI_LINE_NONE)
 194     {
 195       switch (EXTI_InitStruct->Mode)
 196       {
 197         case LL_EXTI_MODE_IT:
 198           /* First Disable Event on provided Lines */
 199           LL_EXTI_DisableEvent_32_63(EXTI_InitStruct->Line_32_63);
 200           /* Then Enable IT on provided Lines */
 201           LL_EXTI_EnableIT_32_63(EXTI_InitStruct->Line_32_63);
 202           break;
 203         case LL_EXTI_MODE_EVENT:
 204           /* First Disable IT on provided Lines */
 205           LL_EXTI_DisableIT_32_63(EXTI_InitStruct->Line_32_63);
 206           /* Then Enable Event on provided Lines */
 207           LL_EXTI_EnableEvent_32_63(EXTI_InitStruct->Line_32_63);
 208           break;
 209         case LL_EXTI_MODE_IT_EVENT:
 210           /* Directly Enable IT on provided Lines */
 211           LL_EXTI_EnableIT_32_63(EXTI_InitStruct->Line_32_63);
 212           /* Directly Enable IT on provided Lines */
 213           LL_EXTI_EnableEvent_32_63(EXTI_InitStruct->Line_32_63);
 214           break;
 215         default:
 216           status |= 0x04u;
 217           break;
 218       }
 219       if (EXTI_InitStruct->Trigger != LL_EXTI_TRIGGER_NONE)
 220       {
 221         switch (EXTI_InitStruct->Trigger)
 222         {
 223           case LL_EXTI_TRIGGER_RISING:
 224             /* First Disable Falling Trigger on provided Lines */
 225             LL_EXTI_DisableFallingTrig_32_63(EXTI_InitStruct->Line_32_63);
 226             /* Then Enable IT on provided Lines */
 227             LL_EXTI_EnableRisingTrig_32_63(EXTI_InitStruct->Line_32_63);
 228             break;
 229           case LL_EXTI_TRIGGER_FALLING:
 230             /* First Disable Rising Trigger on provided Lines */
 231             LL_EXTI_DisableRisingTrig_32_63(EXTI_InitStruct->Line_32_63);
 232             /* Then Enable Falling Trigger on provided Lines */
 233             LL_EXTI_EnableFallingTrig_32_63(EXTI_InitStruct->Line_32_63);
 234             break;
 235           case LL_EXTI_TRIGGER_RISING_FALLING:
 236             /* Enable Rising Trigger on provided Lines */
 237             LL_EXTI_EnableRisingTrig_32_63(EXTI_InitStruct->Line_32_63);
 238             /* Enable Falling Trigger on provided Lines */
 239             LL_EXTI_EnableFallingTrig_32_63(EXTI_InitStruct->Line_32_63);
 240             break;
 241           default:
 242             status |= 0x05u;
 243             break;
 244         }
 245       }
 246     }
 247   }
 248   /* DISABLE LineCommand */
 249   else
 250   {
 251     /* De-configure IT EXTI Lines in range from 0 to 31 */
 252     LL_EXTI_DisableIT_0_31(EXTI_InitStruct->Line_0_31);
 253     /* De-configure Event EXTI Lines in range from 0 to 31 */
 254     LL_EXTI_DisableEvent_0_31(EXTI_InitStruct->Line_0_31);
 255     /* De-configure IT EXTI Lines in range from 32 to 63 */
 256     LL_EXTI_DisableIT_32_63(EXTI_InitStruct->Line_32_63);
 257     /* De-configure Event EXTI Lines in range from 32 to 63 */
 258     LL_EXTI_DisableEvent_32_63(EXTI_InitStruct->Line_32_63);
 259   }
 260
 261   return status;
 262 }
 263
 264 /**
 265   * @brief  Set each @ref LL_EXTI_InitTypeDef field to default value.
 266   * @param  EXTI_InitStruct Pointer to a @ref LL_EXTI_InitTypeDef structure.
 267   * @retval None
 268   */
 269 void LL_EXTI_StructInit(LL_EXTI_InitTypeDef *EXTI_InitStruct)
 270 {
 271   EXTI_InitStruct->Line_0_31      = LL_EXTI_LINE_NONE;
 272   EXTI_InitStruct->Line_32_63     = LL_EXTI_LINE_NONE;
 273   EXTI_InitStruct->LineCommand    = DISABLE;
 274   EXTI_InitStruct->Mode           = LL_EXTI_MODE_IT;
 275   EXTI_InitStruct->Trigger        = LL_EXTI_TRIGGER_FALLING;
 276 }
 277
 278 /**
 279   * @}
 280   */
 281
 282 /**
 283   * @}
 284   */
 285
 286 /**
 287   * @}
 288   */
 289
 290 #endif /* defined (EXTI) */
 291
 292 /**
 293   * @}
 294   */
 295
 296 #endif /* USE_FULL_LL_DRIVER */
 297
 298 /************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/