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1 
/**
 1 
/**
2 
  ******************************************************************************
 2 
  ******************************************************************************
3 
  * @file    stm32l1xx_ll_exti.c
 3 
  * @file    stm32l1xx_ll_exti.c
4 
  * @author  MCD Application Team
 4 
  * @author  MCD Application Team
5 
  * @brief   EXTI LL module driver.
 5 
  * @brief   EXTI LL module driver.
6 
  ******************************************************************************
 6 
  ******************************************************************************
7 
  * @attention
 7 
  * @attention
8 
  *
 8 
  *
9 
  * <h2><center>&copy; Copyright (c) 2017 STMicroelectronics.
 9 
  * Copyright (c) 2017 STMicroelectronics.
10 
  * All rights reserved.</center></h2>
 10 
  * All rights reserved.
11 
  *
 11 
  *
12 
  * This software component is licensed by ST under BSD 3-Clause license,
 12 
  * This software is licensed under terms that can be found in the LICENSE file
13 
  * the "License"; You may not use this file except in compliance with the
 13 
  * in the root directory of this software component.
14 
  * License. You may obtain a copy of the License at:
 14 
  * If no LICENSE file comes with this software, it is provided AS-IS.
15 
  *                        opensource.org/licenses/BSD-3-Clause
 15 
  *
16 
  *
 16 
  ******************************************************************************
17 
  ******************************************************************************
 17 
  */
18 
  */
 18 
#if defined(USE_FULL_LL_DRIVER)
19 
#if defined(USE_FULL_LL_DRIVER)
 19 
 
20 
 
 20 
/* Includes ------------------------------------------------------------------*/
21 
/* Includes ------------------------------------------------------------------*/
 21 
#include "stm32l1xx_ll_exti.h"
22 
#include "stm32l1xx_ll_exti.h"
 22 
#ifdef  USE_FULL_ASSERT
23 
#ifdef  USE_FULL_ASSERT
 23 
#include "stm32_assert.h"
24 
#include "stm32_assert.h"
 24 
#else
25 
#else
 25 
#define assert_param(expr) ((void)0U)
26 
#define assert_param(expr) ((void)0U)
 26 
#endif
27 
#endif
 27 
 
28 
 
 28 
/** @addtogroup STM32L1xx_LL_Driver
29 
/** @addtogroup STM32L1xx_LL_Driver
 29 
  * @{
30 
  * @{
 30 
  */
31 
  */
 31 
 
32 
 
 32 
#if defined (EXTI)
33 
#if defined (EXTI)
 33 
 
34 
 
 34 
/** @defgroup EXTI_LL EXTI
35 
/** @defgroup EXTI_LL EXTI
 35 
  * @{
36 
  * @{
 36 
  */
37 
  */
 37 
 
38 
 
 38 
/* Private types -------------------------------------------------------------*/
39 
/* Private types -------------------------------------------------------------*/
 39 
/* Private variables ---------------------------------------------------------*/
40 
/* Private variables ---------------------------------------------------------*/
 40 
/* Private constants ---------------------------------------------------------*/
41 
/* Private constants ---------------------------------------------------------*/
 41 
/* Private macros ------------------------------------------------------------*/
42 
/* Private macros ------------------------------------------------------------*/
 42 
/** @addtogroup EXTI_LL_Private_Macros
43 
/** @addtogroup EXTI_LL_Private_Macros
 43 
  * @{
44 
  * @{
 44 
  */
45 
  */
 45 
 
46 
 
 46 
#define IS_LL_EXTI_LINE_0_31(__VALUE__)              (((__VALUE__) & ~LL_EXTI_LINE_ALL_0_31) == 0x00000000U)
47 
#define IS_LL_EXTI_LINE_0_31(__VALUE__)              (((__VALUE__) & ~LL_EXTI_LINE_ALL_0_31) == 0x00000000U)
 47 
 
48 
 
 48 
#define IS_LL_EXTI_MODE(__VALUE__)                   (((__VALUE__) == LL_EXTI_MODE_IT)            \
49 
#define IS_LL_EXTI_MODE(__VALUE__)                   (((__VALUE__) == LL_EXTI_MODE_IT)            \
 49 
                                                   || ((__VALUE__) == LL_EXTI_MODE_EVENT)         \
50 
                                                   || ((__VALUE__) == LL_EXTI_MODE_EVENT)         \
 50 
                                                   || ((__VALUE__) == LL_EXTI_MODE_IT_EVENT))
51 
                                                   || ((__VALUE__) == LL_EXTI_MODE_IT_EVENT))
 51 
 
52 
 
 52 
 
53 
 
 53 
#define IS_LL_EXTI_TRIGGER(__VALUE__)                (((__VALUE__) == LL_EXTI_TRIGGER_NONE)       \
54 
#define IS_LL_EXTI_TRIGGER(__VALUE__)                (((__VALUE__) == LL_EXTI_TRIGGER_NONE)       \
 54 
                                                   || ((__VALUE__) == LL_EXTI_TRIGGER_RISING)     \
55 
                                                   || ((__VALUE__) == LL_EXTI_TRIGGER_RISING)     \
 55 
                                                   || ((__VALUE__) == LL_EXTI_TRIGGER_FALLING)    \
56 
                                                   || ((__VALUE__) == LL_EXTI_TRIGGER_FALLING)    \
 56 
                                                   || ((__VALUE__) == LL_EXTI_TRIGGER_RISING_FALLING))
57 
                                                   || ((__VALUE__) == LL_EXTI_TRIGGER_RISING_FALLING))
 57 
 
58 
 
 58 
/**
59 
/**
 59 
  * @}
60 
  * @}
 60 
  */
61 
  */
 61 
 
62 
 
 62 
/* Private function prototypes -----------------------------------------------*/
63 
/* Private function prototypes -----------------------------------------------*/
 63 
 
64 
 
 64 
/* Exported functions --------------------------------------------------------*/
65 
/* Exported functions --------------------------------------------------------*/
 65 
/** @addtogroup EXTI_LL_Exported_Functions
66 
/** @addtogroup EXTI_LL_Exported_Functions
 66 
  * @{
67 
  * @{
 67 
  */
68 
  */
 68 
 
69 
 
 69 
/** @addtogroup EXTI_LL_EF_Init
70 
/** @addtogroup EXTI_LL_EF_Init
 70 
  * @{
71 
  * @{
 71 
  */
72 
  */
 72 
 
73 
 
 73 
/**
74 
/**
 74 
  * @brief  De-initialize the EXTI registers to their default reset values.
75 
  * @brief  De-initialize the EXTI registers to their default reset values.
 75 
  * @retval An ErrorStatus enumeration value:
76 
  * @retval An ErrorStatus enumeration value:
 76 
  *          - SUCCESS: EXTI registers are de-initialized
77 
  *          - SUCCESS: EXTI registers are de-initialized
 77 
  *          - ERROR: not applicable
78 
  *          - ERROR: not applicable
 78 
  */
79 
  */
 79 
uint32_t LL_EXTI_DeInit(void)
80 
uint32_t LL_EXTI_DeInit(void)
 80 
{
81 
{
 81 
  /* Interrupt mask register set to default reset values */
82 
  /* Interrupt mask register set to default reset values */
 82 
  LL_EXTI_WriteReg(IMR,   0x00000000U);
83 
  LL_EXTI_WriteReg(IMR,   0x00000000U);
 83 
  /* Event mask register set to default reset values */
84 
  /* Event mask register set to default reset values */
 84 
  LL_EXTI_WriteReg(EMR,   0x00000000U);
85 
  LL_EXTI_WriteReg(EMR,   0x00000000U);
 85 
  /* Rising Trigger selection register set to default reset values */
86 
  /* Rising Trigger selection register set to default reset values */
 86 
  LL_EXTI_WriteReg(RTSR,  0x00000000U);
87 
  LL_EXTI_WriteReg(RTSR,  0x00000000U);
 87 
  /* Falling Trigger selection register set to default reset values */
88 
  /* Falling Trigger selection register set to default reset values */
 88 
  LL_EXTI_WriteReg(FTSR,  0x00000000U);
89 
  LL_EXTI_WriteReg(FTSR,  0x00000000U);
 89 
  /* Software interrupt event register set to default reset values */
90 
  /* Software interrupt event register set to default reset values */
 90 
  LL_EXTI_WriteReg(SWIER, 0x00000000U);
91 
  LL_EXTI_WriteReg(SWIER, 0x00000000U);
 91 
  /* Pending register clear */
92 
  /* Pending register clear */
 92 
  LL_EXTI_WriteReg(PR,    0x00FFFFFFU);
93 
  LL_EXTI_WriteReg(PR,    0x00FFFFFFU);
 93 
 
94 
 
 94 
  return SUCCESS;
95 
  return SUCCESS;
 95 
}
96 
}
 96 
 
97 
 
 97 
/**
98 
/**
 98 
  * @brief  Initialize the EXTI registers according to the specified parameters in EXTI_InitStruct.
99 
  * @brief  Initialize the EXTI registers according to the specified parameters in EXTI_InitStruct.
 99 
  * @param  EXTI_InitStruct pointer to a @ref LL_EXTI_InitTypeDef structure.
100 
  * @param  EXTI_InitStruct pointer to a @ref LL_EXTI_InitTypeDef structure.
 100 
  * @retval An ErrorStatus enumeration value:
101 
  * @retval An ErrorStatus enumeration value:
 101 
  *          - SUCCESS: EXTI registers are initialized
102 
  *          - SUCCESS: EXTI registers are initialized
 102 
  *          - ERROR: not applicable
103 
  *          - ERROR: not applicable
 103 
  */
104 
  */
 104 
uint32_t LL_EXTI_Init(LL_EXTI_InitTypeDef *EXTI_InitStruct)
105 
uint32_t LL_EXTI_Init(LL_EXTI_InitTypeDef *EXTI_InitStruct)
 105 
{
106 
{
 106 
  ErrorStatus status = SUCCESS;
107 
  ErrorStatus status = SUCCESS;
 107 
  /* Check the parameters */
108 
  /* Check the parameters */
 108 
  assert_param(IS_LL_EXTI_LINE_0_31(EXTI_InitStruct->Line_0_31));
109 
  assert_param(IS_LL_EXTI_LINE_0_31(EXTI_InitStruct->Line_0_31));
 109 
  assert_param(IS_FUNCTIONAL_STATE(EXTI_InitStruct->LineCommand));
110 
  assert_param(IS_FUNCTIONAL_STATE(EXTI_InitStruct->LineCommand));
 110 
  assert_param(IS_LL_EXTI_MODE(EXTI_InitStruct->Mode));
111 
  assert_param(IS_LL_EXTI_MODE(EXTI_InitStruct->Mode));
 111 
 
112 
 
 112 
  /* ENABLE LineCommand */
113 
  /* ENABLE LineCommand */
 113 
  if (EXTI_InitStruct->LineCommand != DISABLE)
114 
  if (EXTI_InitStruct->LineCommand != DISABLE)
 114 
  {
115 
  {
 115 
    assert_param(IS_LL_EXTI_TRIGGER(EXTI_InitStruct->Trigger));
116 
    assert_param(IS_LL_EXTI_TRIGGER(EXTI_InitStruct->Trigger));
 116 
 
117 
 
 117 
    /* Configure EXTI Lines in range from 0 to 31 */
118 
    /* Configure EXTI Lines in range from 0 to 31 */
 118 
    if (EXTI_InitStruct->Line_0_31 != LL_EXTI_LINE_NONE)
119 
    if (EXTI_InitStruct->Line_0_31 != LL_EXTI_LINE_NONE)
 119 
    {
120 
    {
 120 
      switch (EXTI_InitStruct->Mode)
121 
      switch (EXTI_InitStruct->Mode)
 121 
      {
122 
      {
 122 
        case LL_EXTI_MODE_IT:
123 
        case LL_EXTI_MODE_IT:
 123 
          /* First Disable Event on provided Lines */
124 
          /* First Disable Event on provided Lines */
 124 
          LL_EXTI_DisableEvent_0_31(EXTI_InitStruct->Line_0_31);
125 
          LL_EXTI_DisableEvent_0_31(EXTI_InitStruct->Line_0_31);
 125 
          /* Then Enable IT on provided Lines */
126 
          /* Then Enable IT on provided Lines */
 126 
          LL_EXTI_EnableIT_0_31(EXTI_InitStruct->Line_0_31);
127 
          LL_EXTI_EnableIT_0_31(EXTI_InitStruct->Line_0_31);
 127 
          break;
128 
          break;
 128 
        case LL_EXTI_MODE_EVENT:
129 
        case LL_EXTI_MODE_EVENT:
 129 
          /* First Disable IT on provided Lines */
130 
          /* First Disable IT on provided Lines */
 130 
          LL_EXTI_DisableIT_0_31(EXTI_InitStruct->Line_0_31);
131 
          LL_EXTI_DisableIT_0_31(EXTI_InitStruct->Line_0_31);
 131 
          /* Then Enable Event on provided Lines */
132 
          /* Then Enable Event on provided Lines */
 132 
          LL_EXTI_EnableEvent_0_31(EXTI_InitStruct->Line_0_31);
133 
          LL_EXTI_EnableEvent_0_31(EXTI_InitStruct->Line_0_31);
 133 
          break;
134 
          break;
 134 
        case LL_EXTI_MODE_IT_EVENT:
135 
        case LL_EXTI_MODE_IT_EVENT:
 135 
          /* Directly Enable IT & Event on provided Lines */
136 
          /* Directly Enable IT & Event on provided Lines */
 136 
          LL_EXTI_EnableIT_0_31(EXTI_InitStruct->Line_0_31);
137 
          LL_EXTI_EnableIT_0_31(EXTI_InitStruct->Line_0_31);
 137 
          LL_EXTI_EnableEvent_0_31(EXTI_InitStruct->Line_0_31);
138 
          LL_EXTI_EnableEvent_0_31(EXTI_InitStruct->Line_0_31);
 138 
          break;
139 
          break;
 139 
        default:
140 
        default:
 140 
          status = ERROR;
141 
          status = ERROR;
 141 
          break;
142 
          break;
 142 
      }
143 
      }
 143 
      if (EXTI_InitStruct->Trigger != LL_EXTI_TRIGGER_NONE)
144 
      if (EXTI_InitStruct->Trigger != LL_EXTI_TRIGGER_NONE)
 144 
      {
145 
      {
 145 
        switch (EXTI_InitStruct->Trigger)
146 
        switch (EXTI_InitStruct->Trigger)
 146 
        {
147 
        {
 147 
          case LL_EXTI_TRIGGER_RISING:
148 
          case LL_EXTI_TRIGGER_RISING:
 148 
            /* First Disable Falling Trigger on provided Lines */
149 
            /* First Disable Falling Trigger on provided Lines */
 149 
            LL_EXTI_DisableFallingTrig_0_31(EXTI_InitStruct->Line_0_31);
150 
            LL_EXTI_DisableFallingTrig_0_31(EXTI_InitStruct->Line_0_31);
 150 
            /* Then Enable Rising Trigger on provided Lines */
151 
            /* Then Enable Rising Trigger on provided Lines */
 151 
            LL_EXTI_EnableRisingTrig_0_31(EXTI_InitStruct->Line_0_31);
152 
            LL_EXTI_EnableRisingTrig_0_31(EXTI_InitStruct->Line_0_31);
 152 
            break;
153 
            break;
 153 
          case LL_EXTI_TRIGGER_FALLING:
154 
          case LL_EXTI_TRIGGER_FALLING:
 154 
            /* First Disable Rising Trigger on provided Lines */
155 
            /* First Disable Rising Trigger on provided Lines */
 155 
            LL_EXTI_DisableRisingTrig_0_31(EXTI_InitStruct->Line_0_31);
156 
            LL_EXTI_DisableRisingTrig_0_31(EXTI_InitStruct->Line_0_31);
 156 
            /* Then Enable Falling Trigger on provided Lines */
157 
            /* Then Enable Falling Trigger on provided Lines */
 157 
            LL_EXTI_EnableFallingTrig_0_31(EXTI_InitStruct->Line_0_31);
158 
            LL_EXTI_EnableFallingTrig_0_31(EXTI_InitStruct->Line_0_31);
 158 
            break;
159 
            break;
 159 
          case LL_EXTI_TRIGGER_RISING_FALLING:
160 
          case LL_EXTI_TRIGGER_RISING_FALLING:
 160 
            LL_EXTI_EnableRisingTrig_0_31(EXTI_InitStruct->Line_0_31);
161 
            LL_EXTI_EnableRisingTrig_0_31(EXTI_InitStruct->Line_0_31);
 161 
            LL_EXTI_EnableFallingTrig_0_31(EXTI_InitStruct->Line_0_31);
162 
            LL_EXTI_EnableFallingTrig_0_31(EXTI_InitStruct->Line_0_31);
 162 
            break;
163 
            break;
 163 
          default:
164 
          default:
 164 
            status = ERROR;
165 
            status = ERROR;
 165 
            break;
166 
            break;
 166 
        }
167 
        }
 167 
      }
168 
      }
 168 
    }
169 
    }
 169 
  }
170 
  }
 170 
  /* DISABLE LineCommand */
171 
  /* DISABLE LineCommand */
 171 
  else
172 
  else
 172 
  {
173 
  {
 173 
    /* De-configure EXTI Lines in range from 0 to 31 */
174 
    /* De-configure EXTI Lines in range from 0 to 31 */
 174 
    LL_EXTI_DisableIT_0_31(EXTI_InitStruct->Line_0_31);
175 
    LL_EXTI_DisableIT_0_31(EXTI_InitStruct->Line_0_31);
 175 
    LL_EXTI_DisableEvent_0_31(EXTI_InitStruct->Line_0_31);
176 
    LL_EXTI_DisableEvent_0_31(EXTI_InitStruct->Line_0_31);
 176 
  }
177 
  }
 177 
  return status;
178 
  return status;
 178 
}
179 
}
 179 
 
180 
 
 180 
/**
181 
/**
 181 
  * @brief  Set each @ref LL_EXTI_InitTypeDef field to default value.
182 
  * @brief  Set each @ref LL_EXTI_InitTypeDef field to default value.
 182 
  * @param  EXTI_InitStruct Pointer to a @ref LL_EXTI_InitTypeDef structure.
183 
  * @param  EXTI_InitStruct Pointer to a @ref LL_EXTI_InitTypeDef structure.
 183 
  * @retval None
184 
  * @retval None
 184 
  */
185 
  */
 185 
void LL_EXTI_StructInit(LL_EXTI_InitTypeDef *EXTI_InitStruct)
186 
void LL_EXTI_StructInit(LL_EXTI_InitTypeDef *EXTI_InitStruct)
 186 
{
187 
{
 187 
  EXTI_InitStruct->Line_0_31      = LL_EXTI_LINE_NONE;
188 
  EXTI_InitStruct->Line_0_31      = LL_EXTI_LINE_NONE;
 188 
  EXTI_InitStruct->LineCommand    = DISABLE;
189 
  EXTI_InitStruct->LineCommand    = DISABLE;
 189 
  EXTI_InitStruct->Mode           = LL_EXTI_MODE_IT;
190 
  EXTI_InitStruct->Mode           = LL_EXTI_MODE_IT;
 190 
  EXTI_InitStruct->Trigger        = LL_EXTI_TRIGGER_FALLING;
191 
  EXTI_InitStruct->Trigger        = LL_EXTI_TRIGGER_FALLING;
 191 
}
192 
}
 192 
 
193 
 
 193 
/**
194 
/**
 194 
  * @}
195 
  * @}
 195 
  */
196 
  */
 196 
 
197 
 
 197 
/**
198 
/**
 198 
  * @}
199 
  * @}
 199 
  */
200 
  */
 200 
 
201 
 
 201 
/**
202 
/**
 202 
  * @}
203 
  * @}
 203 
  */
204 
  */
 204 
 
205 
 
 205 
#endif /* defined (EXTI) */
206 
#endif /* defined (EXTI) */
 206 
 
207 
 
 207 
/**
208 
/**
 208 
  * @}
209 
  * @}
 209 
  */
210 
  */
 210 
 
211 
 
 211 
#endif /* USE_FULL_LL_DRIVER */
212 
#endif /* USE_FULL_LL_DRIVER */
 212 
 
213 
 
 213 
/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/
214 
/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/
 -