summaryrefslogtreecommitdiff
path: root/hid-dials/Drivers/STM32F0xx_HAL_Driver/Src/stm32f0xx_ll_exti.c
blob: 28320375b4689b37f72c0c8c18f9d5bde544851b (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
/**
  ******************************************************************************
  * @file    stm32f0xx_ll_exti.c
  * @author  MCD Application Team
  * @brief   EXTI LL module driver.
  ******************************************************************************
  * @attention
  *
  * <h2><center>&copy; Copyright (c) 2016 STMicroelectronics.
  * All rights reserved.</center></h2>
  *
  * This software component is licensed by ST under BSD 3-Clause license,
  * the "License"; You may not use this file except in compliance with the
  * License. You may obtain a copy of the License at:
  *                        opensource.org/licenses/BSD-3-Clause
  *
  ******************************************************************************
  */

#if defined(USE_FULL_LL_DRIVER)

/* Includes ------------------------------------------------------------------*/
#include "stm32f0xx_ll_exti.h"
#ifdef  USE_FULL_ASSERT
#include "stm32_assert.h"
#else
#define assert_param(expr) ((void)0U)
#endif

/** @addtogroup STM32F0xx_LL_Driver
  * @{
  */

#if defined (EXTI)

/** @defgroup EXTI_LL EXTI
  * @{
  */

/* Private types -------------------------------------------------------------*/
/* Private variables ---------------------------------------------------------*/
/* Private constants ---------------------------------------------------------*/
/* Private macros ------------------------------------------------------------*/
/** @addtogroup EXTI_LL_Private_Macros
  * @{
  */

#define IS_LL_EXTI_LINE_0_31(__VALUE__)              (((__VALUE__) & ~LL_EXTI_LINE_ALL_0_31) == 0x00000000U)

#define IS_LL_EXTI_MODE(__VALUE__)                   (((__VALUE__) == LL_EXTI_MODE_IT)            \
                                                   || ((__VALUE__) == LL_EXTI_MODE_EVENT)         \
                                                   || ((__VALUE__) == LL_EXTI_MODE_IT_EVENT))


#define IS_LL_EXTI_TRIGGER(__VALUE__)                (((__VALUE__) == LL_EXTI_TRIGGER_NONE)       \
                                                   || ((__VALUE__) == LL_EXTI_TRIGGER_RISING)     \
                                                   || ((__VALUE__) == LL_EXTI_TRIGGER_FALLING)    \
                                                   || ((__VALUE__) == LL_EXTI_TRIGGER_RISING_FALLING))

/**
  * @}
  */

/* Private function prototypes -----------------------------------------------*/

/* Exported functions --------------------------------------------------------*/
/** @addtogroup EXTI_LL_Exported_Functions
  * @{
  */

/** @addtogroup EXTI_LL_EF_Init
  * @{
  */

/**
  * @brief  De-initialize the EXTI registers to their default reset values.
  * @retval An ErrorStatus enumeration value:
  *          - SUCCESS: EXTI registers are de-initialized
  *          - ERROR: not applicable
  */
uint32_t LL_EXTI_DeInit(void)
{
  /* Interrupt mask register set to default reset values */
#if defined(STM32F030x6) || defined(STM32F031x6) ||defined(STM32F038xx)
  LL_EXTI_WriteReg(IMR,   0x0FF40000U);
#elif defined(STM32F070x6) || defined(STM32F042x6) || defined(STM32F048xx)
  LL_EXTI_WriteReg(IMR,   0x7FF40000U);
#elif defined(STM32F030x8) || defined(STM32F051x8) || defined(STM32F058xx)
  LL_EXTI_WriteReg(IMR,   0x0F940000U);
#else
  LL_EXTI_WriteReg(IMR,   0x7F840000U);
#endif
  /* Event mask register set to default reset values */
  LL_EXTI_WriteReg(EMR,   0x00000000U);
  /* Rising Trigger selection register set to default reset values */
  LL_EXTI_WriteReg(RTSR,  0x00000000U);
  /* Falling Trigger selection register set to default reset values */
  LL_EXTI_WriteReg(FTSR,  0x00000000U);
  /* Software interrupt event register set to default reset values */
  LL_EXTI_WriteReg(SWIER, 0x00000000U);
  /* Pending register clear */
  LL_EXTI_WriteReg(PR,    0x007BFFFFU);

  return SUCCESS;
}

/**
  * @brief  Initialize the EXTI registers according to the specified parameters in EXTI_InitStruct.
  * @param  EXTI_InitStruct pointer to a @ref LL_EXTI_InitTypeDef structure.
  * @retval An ErrorStatus enumeration value:
  *          - SUCCESS: EXTI registers are initialized
  *          - ERROR: not applicable
  */
uint32_t LL_EXTI_Init(LL_EXTI_InitTypeDef *EXTI_InitStruct)
{
  ErrorStatus status = SUCCESS;
  /* Check the parameters */
  assert_param(IS_LL_EXTI_LINE_0_31(EXTI_InitStruct->Line_0_31));
  assert_param(IS_FUNCTIONAL_STATE(EXTI_InitStruct->LineCommand));
  assert_param(IS_LL_EXTI_MODE(EXTI_InitStruct->Mode));

  /* ENABLE LineCommand */
  if (EXTI_InitStruct->LineCommand != DISABLE)
  {
    assert_param(IS_LL_EXTI_TRIGGER(EXTI_InitStruct->Trigger));

    /* Configure EXTI Lines in range from 0 to 31 */
    if (EXTI_InitStruct->Line_0_31 != LL_EXTI_LINE_NONE)
    {
      switch (EXTI_InitStruct->Mode)
      {
        case LL_EXTI_MODE_IT:
          /* First Disable Event on provided Lines */
          LL_EXTI_DisableEvent_0_31(EXTI_InitStruct->Line_0_31);
          /* Then Enable IT on provided Lines */
          LL_EXTI_EnableIT_0_31(EXTI_InitStruct->Line_0_31);
          break;
        case LL_EXTI_MODE_EVENT:
          /* First Disable IT on provided Lines */
          LL_EXTI_DisableIT_0_31(EXTI_InitStruct->Line_0_31);
          /* Then Enable Event on provided Lines */
          LL_EXTI_EnableEvent_0_31(EXTI_InitStruct->Line_0_31);
          break;
        case LL_EXTI_MODE_IT_EVENT:
          /* Directly Enable IT & Event on provided Lines */
          LL_EXTI_EnableIT_0_31(EXTI_InitStruct->Line_0_31);
          LL_EXTI_EnableEvent_0_31(EXTI_InitStruct->Line_0_31);
          break;
        default:
          status = ERROR;
          break;
      }
      if (EXTI_InitStruct->Trigger != LL_EXTI_TRIGGER_NONE)
      {
        switch (EXTI_InitStruct->Trigger)
        {
          case LL_EXTI_TRIGGER_RISING:
            /* First Disable Falling Trigger on provided Lines */
            LL_EXTI_DisableFallingTrig_0_31(EXTI_InitStruct->Line_0_31);
            /* Then Enable Rising Trigger on provided Lines */
            LL_EXTI_EnableRisingTrig_0_31(EXTI_InitStruct->Line_0_31);
            break;
          case LL_EXTI_TRIGGER_FALLING:
            /* First Disable Rising Trigger on provided Lines */
            LL_EXTI_DisableRisingTrig_0_31(EXTI_InitStruct->Line_0_31);
            /* Then Enable Falling Trigger on provided Lines */
            LL_EXTI_EnableFallingTrig_0_31(EXTI_InitStruct->Line_0_31);
            break;
          case LL_EXTI_TRIGGER_RISING_FALLING:
            LL_EXTI_EnableRisingTrig_0_31(EXTI_InitStruct->Line_0_31);
            LL_EXTI_EnableFallingTrig_0_31(EXTI_InitStruct->Line_0_31);
            break;
          default:
            status = ERROR;
            break;
        }
      }
    }
  }
  /* DISABLE LineCommand */
  else
  {
    /* De-configure EXTI Lines in range from 0 to 31 */
    LL_EXTI_DisableIT_0_31(EXTI_InitStruct->Line_0_31);
    LL_EXTI_DisableEvent_0_31(EXTI_InitStruct->Line_0_31);
  }
  return status;
}

/**
  * @brief  Set each @ref LL_EXTI_InitTypeDef field to default value.
  * @param  EXTI_InitStruct Pointer to a @ref LL_EXTI_InitTypeDef structure.
  * @retval None
  */
void LL_EXTI_StructInit(LL_EXTI_InitTypeDef *EXTI_InitStruct)
{
  EXTI_InitStruct->Line_0_31      = LL_EXTI_LINE_NONE;
  EXTI_InitStruct->LineCommand    = DISABLE;
  EXTI_InitStruct->Mode           = LL_EXTI_MODE_IT;
  EXTI_InitStruct->Trigger        = LL_EXTI_TRIGGER_FALLING;
}

/**
  * @}
  */

/**
  * @}
  */

/**
  * @}
  */

#endif /* defined (EXTI) */

/**
  * @}
  */

#endif /* USE_FULL_LL_DRIVER */

/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/