1 /**
2 ******************************************************************************
3 * @file stm32f0xx_ll_exti.c
4 * @author MCD Application Team
5 * @brief EXTI LL module driver.
6 ******************************************************************************
7 * @attention
8 *
9 * <h2><center>© COPYRIGHT(c) 2016 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 "stm32f0xx_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 STM32F0xx_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 */
LL_EXTI_DeInit(void)96 uint32_t LL_EXTI_DeInit(void)
97 {
98 /* Interrupt mask register set to default reset values */
99 #if defined(STM32F030x6) || defined(STM32F031x6) ||defined(STM32F038xx)
100 LL_EXTI_WriteReg(IMR, 0x0FF40000U);
101 #elif defined(STM32F070x6) || defined(STM32F042x6) || defined(STM32F048xx)
102 LL_EXTI_WriteReg(IMR, 0x7FF40000U);
103 #elif defined(STM32F030x8) || defined(STM32F051x8) || defined(STM32F058xx)
104 LL_EXTI_WriteReg(IMR, 0x0F940000U);
105 #else
106 LL_EXTI_WriteReg(IMR, 0x7F840000U);
107 #endif
108 /* Event mask register set to default reset values */
109 LL_EXTI_WriteReg(EMR, 0x00000000U);
110 /* Rising Trigger selection register set to default reset values */
111 LL_EXTI_WriteReg(RTSR, 0x00000000U);
112 /* Falling Trigger selection register set to default reset values */
113 LL_EXTI_WriteReg(FTSR, 0x00000000U);
114 /* Software interrupt event register set to default reset values */
115 LL_EXTI_WriteReg(SWIER, 0x00000000U);
116 /* Pending register clear */
117 LL_EXTI_WriteReg(PR, 0x007BFFFFU);
118
119 return SUCCESS;
120 }
121
122 /**
123 * @brief Initialize the EXTI registers according to the specified parameters in EXTI_InitStruct.
124 * @param EXTI_InitStruct pointer to a @ref LL_EXTI_InitTypeDef structure.
125 * @retval An ErrorStatus enumeration value:
126 * - SUCCESS: EXTI registers are initialized
127 * - ERROR: not applicable
128 */
LL_EXTI_Init(LL_EXTI_InitTypeDef * EXTI_InitStruct)129 uint32_t LL_EXTI_Init(LL_EXTI_InitTypeDef *EXTI_InitStruct)
130 {
131 ErrorStatus status = SUCCESS;
132 /* Check the parameters */
133 assert_param(IS_LL_EXTI_LINE_0_31(EXTI_InitStruct->Line_0_31));
134 assert_param(IS_FUNCTIONAL_STATE(EXTI_InitStruct->LineCommand));
135 assert_param(IS_LL_EXTI_MODE(EXTI_InitStruct->Mode));
136
137 /* ENABLE LineCommand */
138 if (EXTI_InitStruct->LineCommand != DISABLE)
139 {
140 assert_param(IS_LL_EXTI_TRIGGER(EXTI_InitStruct->Trigger));
141
142 /* Configure EXTI Lines in range from 0 to 31 */
143 if (EXTI_InitStruct->Line_0_31 != LL_EXTI_LINE_NONE)
144 {
145 switch (EXTI_InitStruct->Mode)
146 {
147 case LL_EXTI_MODE_IT:
148 /* First Disable Event on provided Lines */
149 LL_EXTI_DisableEvent_0_31(EXTI_InitStruct->Line_0_31);
150 /* Then Enable IT on provided Lines */
151 LL_EXTI_EnableIT_0_31(EXTI_InitStruct->Line_0_31);
152 break;
153 case LL_EXTI_MODE_EVENT:
154 /* First Disable IT on provided Lines */
155 LL_EXTI_DisableIT_0_31(EXTI_InitStruct->Line_0_31);
156 /* Then Enable Event on provided Lines */
157 LL_EXTI_EnableEvent_0_31(EXTI_InitStruct->Line_0_31);
158 break;
159 case LL_EXTI_MODE_IT_EVENT:
160 /* Directly Enable IT & Event on provided Lines */
161 LL_EXTI_EnableIT_0_31(EXTI_InitStruct->Line_0_31);
162 LL_EXTI_EnableEvent_0_31(EXTI_InitStruct->Line_0_31);
163 break;
164 default:
165 status = ERROR;
166 break;
167 }
168 if (EXTI_InitStruct->Trigger != LL_EXTI_TRIGGER_NONE)
169 {
170 switch (EXTI_InitStruct->Trigger)
171 {
172 case LL_EXTI_TRIGGER_RISING:
173 /* First Disable Falling Trigger on provided Lines */
174 LL_EXTI_DisableFallingTrig_0_31(EXTI_InitStruct->Line_0_31);
175 /* Then Enable Rising Trigger on provided Lines */
176 LL_EXTI_EnableRisingTrig_0_31(EXTI_InitStruct->Line_0_31);
177 break;
178 case LL_EXTI_TRIGGER_FALLING:
179 /* First Disable Rising Trigger on provided Lines */
180 LL_EXTI_DisableRisingTrig_0_31(EXTI_InitStruct->Line_0_31);
181 /* Then Enable Falling Trigger on provided Lines */
182 LL_EXTI_EnableFallingTrig_0_31(EXTI_InitStruct->Line_0_31);
183 break;
184 case LL_EXTI_TRIGGER_RISING_FALLING:
185 LL_EXTI_EnableRisingTrig_0_31(EXTI_InitStruct->Line_0_31);
186 LL_EXTI_EnableFallingTrig_0_31(EXTI_InitStruct->Line_0_31);
187 break;
188 default:
189 status = ERROR;
190 break;
191 }
192 }
193 }
194 }
195 /* DISABLE LineCommand */
196 else
197 {
198 /* De-configure EXTI Lines in range from 0 to 31 */
199 LL_EXTI_DisableIT_0_31(EXTI_InitStruct->Line_0_31);
200 LL_EXTI_DisableEvent_0_31(EXTI_InitStruct->Line_0_31);
201 }
202 return status;
203 }
204
205 /**
206 * @brief Set each @ref LL_EXTI_InitTypeDef field to default value.
207 * @param EXTI_InitStruct Pointer to a @ref LL_EXTI_InitTypeDef structure.
208 * @retval None
209 */
LL_EXTI_StructInit(LL_EXTI_InitTypeDef * EXTI_InitStruct)210 void LL_EXTI_StructInit(LL_EXTI_InitTypeDef *EXTI_InitStruct)
211 {
212 EXTI_InitStruct->Line_0_31 = LL_EXTI_LINE_NONE;
213 EXTI_InitStruct->LineCommand = DISABLE;
214 EXTI_InitStruct->Mode = LL_EXTI_MODE_IT;
215 EXTI_InitStruct->Trigger = LL_EXTI_TRIGGER_FALLING;
216 }
217
218 /**
219 * @}
220 */
221
222 /**
223 * @}
224 */
225
226 /**
227 * @}
228 */
229
230 #endif /* defined (EXTI) */
231
232 /**
233 * @}
234 */
235
236 #endif /* USE_FULL_LL_DRIVER */
237
238 /************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/
239