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comparison Common/Drivers/STM32F4xx_HAL_Driver/Src/stm32f4xx_ll_exti.c @ 160:e3ca52b8e7fa

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Merge with FlipDisplay
author heinrichsweikamp
date Thu, 07 Mar 2019 15:06:43 +0100
parents c78bcbd5deda
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80:cc2bb7bb8456 160:e3ca52b8e7fa
1 /**
2 ******************************************************************************
3 * @file stm32f4xx_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</center></h2>
10 *
11 * Redistribution and use in source and binary forms, with or without modification,
12 * are permitted provided that the following conditions are met:
13 * 1. Redistributions of source code must retain the above copyright notice,
14 * this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright notice,
16 * this list of conditions and the following disclaimer in the documentation
17 * and/or other materials provided with the distribution.
18 * 3. Neither the name of STMicroelectronics nor the names of its contributors
19 * may be used to endorse or promote products derived from this software
20 * without specific prior written permission.
21 *
22 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
23 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
25 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
28 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
29 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
30 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
31 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
32 *
33 ******************************************************************************
34 */
35 #if defined(USE_FULL_LL_DRIVER)
36
37 /* Includes ------------------------------------------------------------------*/
38 #include "stm32f4xx_ll_exti.h"
39 #ifdef USE_FULL_ASSERT
40 #include "stm32_assert.h"
41 #else
42 #define assert_param(expr) ((void)0U)
43 #endif
44
45 /** @addtogroup STM32F4xx_LL_Driver
46 * @{
47 */
48
49 #if defined (EXTI)
50
51 /** @defgroup EXTI_LL EXTI
52 * @{
53 */
54
55 /* Private types -------------------------------------------------------------*/
56 /* Private variables ---------------------------------------------------------*/
57 /* Private constants ---------------------------------------------------------*/
58 /* Private macros ------------------------------------------------------------*/
59 /** @addtogroup EXTI_LL_Private_Macros
60 * @{
61 */
62
63 #define IS_LL_EXTI_LINE_0_31(__VALUE__) (((__VALUE__) & ~LL_EXTI_LINE_ALL_0_31) == 0x00000000U)
64
65 #define IS_LL_EXTI_MODE(__VALUE__) (((__VALUE__) == LL_EXTI_MODE_IT) \
66 || ((__VALUE__) == LL_EXTI_MODE_EVENT) \
67 || ((__VALUE__) == LL_EXTI_MODE_IT_EVENT))
68
69
70 #define IS_LL_EXTI_TRIGGER(__VALUE__) (((__VALUE__) == LL_EXTI_TRIGGER_NONE) \
71 || ((__VALUE__) == LL_EXTI_TRIGGER_RISING) \
72 || ((__VALUE__) == LL_EXTI_TRIGGER_FALLING) \
73 || ((__VALUE__) == LL_EXTI_TRIGGER_RISING_FALLING))
74
75 /**
76 * @}
77 */
78
79 /* Private function prototypes -----------------------------------------------*/
80
81 /* Exported functions --------------------------------------------------------*/
82 /** @addtogroup EXTI_LL_Exported_Functions
83 * @{
84 */
85
86 /** @addtogroup EXTI_LL_EF_Init
87 * @{
88 */
89
90 /**
91 * @brief De-initialize the EXTI registers to their default reset values.
92 * @retval An ErrorStatus enumeration value:
93 * - SUCCESS: EXTI registers are de-initialized
94 * - ERROR: not applicable
95 */
96 uint32_t LL_EXTI_DeInit(void)
97 {
98 /* Interrupt mask register set to default reset values */
99 LL_EXTI_WriteReg(IMR, 0x00000000U);
100 /* Event mask register set to default reset values */
101 LL_EXTI_WriteReg(EMR, 0x00000000U);
102 /* Rising Trigger selection register set to default reset values */
103 LL_EXTI_WriteReg(RTSR, 0x00000000U);
104 /* Falling Trigger selection register set to default reset values */
105 LL_EXTI_WriteReg(FTSR, 0x00000000U);
106 /* Software interrupt event register set to default reset values */
107 LL_EXTI_WriteReg(SWIER, 0x00000000U);
108 /* Pending register set to default reset values */
109 LL_EXTI_WriteReg(PR, 0x00FFFFFFU);
110
111 return SUCCESS;
112 }
113
114 /**
115 * @brief Initialize the EXTI registers according to the specified parameters in EXTI_InitStruct.
116 * @param EXTI_InitStruct pointer to a @ref LL_EXTI_InitTypeDef structure.
117 * @retval An ErrorStatus enumeration value:
118 * - SUCCESS: EXTI registers are initialized
119 * - ERROR: not applicable
120 */
121 uint32_t LL_EXTI_Init(LL_EXTI_InitTypeDef *EXTI_InitStruct)
122 {
123 ErrorStatus status = SUCCESS;
124 /* Check the parameters */
125 assert_param(IS_LL_EXTI_LINE_0_31(EXTI_InitStruct->Line_0_31));
126 assert_param(IS_FUNCTIONAL_STATE(EXTI_InitStruct->LineCommand));
127 assert_param(IS_LL_EXTI_MODE(EXTI_InitStruct->Mode));
128
129 /* ENABLE LineCommand */
130 if (EXTI_InitStruct->LineCommand != DISABLE)
131 {
132 assert_param(IS_LL_EXTI_TRIGGER(EXTI_InitStruct->Trigger));
133
134 /* Configure EXTI Lines in range from 0 to 31 */
135 if (EXTI_InitStruct->Line_0_31 != LL_EXTI_LINE_NONE)
136 {
137 switch (EXTI_InitStruct->Mode)
138 {
139 case LL_EXTI_MODE_IT:
140 /* First Disable Event on provided Lines */
141 LL_EXTI_DisableEvent_0_31(EXTI_InitStruct->Line_0_31);
142 /* Then Enable IT on provided Lines */
143 LL_EXTI_EnableIT_0_31(EXTI_InitStruct->Line_0_31);
144 break;
145 case LL_EXTI_MODE_EVENT:
146 /* First Disable IT on provided Lines */
147 LL_EXTI_DisableIT_0_31(EXTI_InitStruct->Line_0_31);
148 /* Then Enable Event on provided Lines */
149 LL_EXTI_EnableEvent_0_31(EXTI_InitStruct->Line_0_31);
150 break;
151 case LL_EXTI_MODE_IT_EVENT:
152 /* Directly Enable IT & Event on provided Lines */
153 LL_EXTI_EnableIT_0_31(EXTI_InitStruct->Line_0_31);
154 LL_EXTI_EnableEvent_0_31(EXTI_InitStruct->Line_0_31);
155 break;
156 default:
157 status = ERROR;
158 break;
159 }
160 if (EXTI_InitStruct->Trigger != LL_EXTI_TRIGGER_NONE)
161 {
162 switch (EXTI_InitStruct->Trigger)
163 {
164 case LL_EXTI_TRIGGER_RISING:
165 /* First Disable Falling Trigger on provided Lines */
166 LL_EXTI_DisableFallingTrig_0_31(EXTI_InitStruct->Line_0_31);
167 /* Then Enable Rising Trigger on provided Lines */
168 LL_EXTI_EnableRisingTrig_0_31(EXTI_InitStruct->Line_0_31);
169 break;
170 case LL_EXTI_TRIGGER_FALLING:
171 /* First Disable Rising Trigger on provided Lines */
172 LL_EXTI_DisableRisingTrig_0_31(EXTI_InitStruct->Line_0_31);
173 /* Then Enable Falling Trigger on provided Lines */
174 LL_EXTI_EnableFallingTrig_0_31(EXTI_InitStruct->Line_0_31);
175 break;
176 case LL_EXTI_TRIGGER_RISING_FALLING:
177 LL_EXTI_EnableRisingTrig_0_31(EXTI_InitStruct->Line_0_31);
178 LL_EXTI_EnableFallingTrig_0_31(EXTI_InitStruct->Line_0_31);
179 break;
180 default:
181 status = ERROR;
182 break;
183 }
184 }
185 }
186 }
187 /* DISABLE LineCommand */
188 else
189 {
190 /* De-configure EXTI Lines in range from 0 to 31 */
191 LL_EXTI_DisableIT_0_31(EXTI_InitStruct->Line_0_31);
192 LL_EXTI_DisableEvent_0_31(EXTI_InitStruct->Line_0_31);
193 }
194 return status;
195 }
196
197 /**
198 * @brief Set each @ref LL_EXTI_InitTypeDef field to default value.
199 * @param EXTI_InitStruct Pointer to a @ref LL_EXTI_InitTypeDef structure.
200 * @retval None
201 */
202 void LL_EXTI_StructInit(LL_EXTI_InitTypeDef *EXTI_InitStruct)
203 {
204 EXTI_InitStruct->Line_0_31 = LL_EXTI_LINE_NONE;
205 EXTI_InitStruct->LineCommand = DISABLE;
206 EXTI_InitStruct->Mode = LL_EXTI_MODE_IT;
207 EXTI_InitStruct->Trigger = LL_EXTI_TRIGGER_FALLING;
208 }
209
210 /**
211 * @}
212 */
213
214 /**
215 * @}
216 */
217
218 /**
219 * @}
220 */
221
222 #endif /* defined (EXTI) */
223
224 /**
225 * @}
226 */
227
228 #endif /* USE_FULL_LL_DRIVER */
229
230 /************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/