1 /**
2   ******************************************************************************
3   * @file    stm32g0xx_ll_exti.c
4   * @author  MCD Application Team
5   * @brief   EXTI LL module driver.
6   ******************************************************************************
7   * @attention
8   *
9   * Copyright (c) 2018 STMicroelectronics.
10   * All rights reserved.
11   *
12   * This software is licensed under terms that can be found in the LICENSE file
13   * in the root directory of this software component.
14   * If no LICENSE file comes with this software, it is provided AS-IS.
15   *
16   ******************************************************************************
17   */
18 #if defined(USE_FULL_LL_DRIVER)
19 
20 /* Includes ------------------------------------------------------------------*/
21 #include "stm32g0xx_ll_exti.h"
22 #ifdef  USE_FULL_ASSERT
23 #include "stm32_assert.h"
24 #else
25 #define assert_param(expr) ((void)0U)
26 #endif /* USE_FULL_ASSERT */
27 
28 /** @addtogroup STM32G0xx_LL_Driver
29   * @{
30   */
31 
32 #if defined (EXTI)
33 
34 /** @defgroup EXTI_LL EXTI
35   * @{
36   */
37 
38 /* Private types -------------------------------------------------------------*/
39 /* Private variables ---------------------------------------------------------*/
40 /* Private constants ---------------------------------------------------------*/
41 /* Private macros ------------------------------------------------------------*/
42 /** @addtogroup EXTI_LL_Private_Macros
43   * @{
44   */
45 
46 #define IS_LL_EXTI_LINE_0_31(__VALUE__)              (((__VALUE__) & ~LL_EXTI_LINE_ALL_0_31) == 0x00000000U)
47 #if defined(STM32G081xx) || defined(STM32G071xx) || defined(STM32G0C1xx) || defined(STM32G0B1xx) || defined(STM32G0B0xx)
48 #define IS_LL_EXTI_LINE_32_63(__VALUE__)             (((__VALUE__) & ~LL_EXTI_LINE_ALL_32_63) == 0x00000000U)
49 #endif /* STM32G081xx || STM32G071xx || STM32G0C1xx || STM32G0B1xx || STM32G0B0xx */
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   */
LL_EXTI_DeInit(void)80 uint32_t LL_EXTI_DeInit(void)
81 {
82   /* Interrupt mask register set to default reset values */
83   LL_EXTI_WriteReg(IMR1,   0xFFF80000U);
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 set to default reset values */
93 #if defined(STM32G0C1xx) || defined(STM32G0B1xx)
94   LL_EXTI_WriteReg(RPR1,    0x0017FFFFU);
95   LL_EXTI_WriteReg(FPR1,    0x0017FFFFU);
96 #elif defined(STM32G081xx) || defined(STM32G071xx) || defined(STM32G061xx) || defined(STM32G051xx)
97   LL_EXTI_WriteReg(RPR1,    0x0007FFFFU);
98   LL_EXTI_WriteReg(FPR1,    0x0007FFFFU);
99 #elif defined(STM32G041xx) || defined(STM32G031xx)
100   LL_EXTI_WriteReg(RPR1,    0x0001FFFFU);
101   LL_EXTI_WriteReg(FPR1,    0x0001FFFFU);
102 #elif defined(STM32G0B0xx) || defined(STM32G070xx) || defined(STM32G050xx) || defined(STM32G030xx)
103   LL_EXTI_WriteReg(RPR1,    0x0000FFFFU);
104   LL_EXTI_WriteReg(FPR1,    0x0000FFFFU);
105 #endif /* STM32G0C1xx || STM32G0B1xx */
106 
107 #if defined(STM32G081xx) || defined(STM32G071xx)
108   /* Interrupt mask register 2 set to default reset values */
109   LL_EXTI_WriteReg(IMR2, 0x00000003U);
110   /* Event mask register 2 set to default reset values */
111   LL_EXTI_WriteReg(EMR2, 0x00000000U);
112 #elif defined(STM32G0C1xx) || defined(STM32G0B1xx)
113   /* Interrupt mask register 2 set to default reset values */
114   LL_EXTI_WriteReg(IMR2, 0x0000001FU);
115   /* Event mask register 2 set to default reset values */
116   LL_EXTI_WriteReg(EMR2, 0x00000000U);
117   /* Rising Trigger selection register set to default reset values */
118   LL_EXTI_WriteReg(RTSR2, 0x00000000U);
119   /* Falling Trigger selection register set to default reset values */
120   LL_EXTI_WriteReg(FTSR2, 0x00000000U);
121   /* Software interrupt event register set to default reset values */
122   LL_EXTI_WriteReg(SWIER2, 0x00000000U);
123   /* Pending register set to default reset values */
124   LL_EXTI_WriteReg(RPR2, 0x00000004U);
125   LL_EXTI_WriteReg(FPR2, 0x00000004U);
126 #elif defined(STM32G0B0xx)
127   /* Interrupt mask register 2 set to default reset values */
128   LL_EXTI_WriteReg(IMR2, 0x00000010U);
129   /* Event mask register 2 set to default reset values */
130   LL_EXTI_WriteReg(EMR2, 0x00000000U);
131 #endif /* STM32G081xx || STM32G071xx */
132 
133   return 0x00u;
134 }
135 
136 /**
137   * @brief  Initialize the EXTI registers according to the specified parameters in EXTI_InitStruct.
138   * @param  EXTI_InitStruct pointer to a @ref LL_EXTI_InitTypeDef structure.
139   * @retval An ErrorStatus enumeration value:
140   *          - 0x00: EXTI registers are initialized
141   *          - any other value : wrong configuration
142   */
LL_EXTI_Init(LL_EXTI_InitTypeDef * EXTI_InitStruct)143 uint32_t LL_EXTI_Init(LL_EXTI_InitTypeDef *EXTI_InitStruct)
144 {
145   uint32_t status = 0x00u;
146 
147   /* Check the parameters */
148   assert_param(IS_LL_EXTI_LINE_0_31(EXTI_InitStruct->Line_0_31));
149 #if defined(STM32G081xx) || defined(STM32G071xx) || defined(STM32G0C1xx) || defined(STM32G0B1xx) || defined(STM32G0B0xx)
150   assert_param(IS_LL_EXTI_LINE_32_63(EXTI_InitStruct->Line_32_63));
151 #endif /* STM32G081xx || STM32G071xx || STM32G0C1xx || STM32G0B1xx || STM32G0B0xx */
152   assert_param(IS_FUNCTIONAL_STATE(EXTI_InitStruct->LineCommand));
153   assert_param(IS_LL_EXTI_MODE(EXTI_InitStruct->Mode));
154 
155   /* ENABLE LineCommand */
156   if (EXTI_InitStruct->LineCommand != DISABLE)
157   {
158     assert_param(IS_LL_EXTI_TRIGGER(EXTI_InitStruct->Trigger));
159 
160     /* Configure EXTI Lines in range from 0 to 31 */
161     if (EXTI_InitStruct->Line_0_31 != LL_EXTI_LINE_NONE)
162     {
163       switch (EXTI_InitStruct->Mode)
164       {
165         case LL_EXTI_MODE_IT:
166           /* First Disable Event on provided Lines */
167           LL_EXTI_DisableEvent_0_31(EXTI_InitStruct->Line_0_31);
168           /* Then Enable IT on provided Lines */
169           LL_EXTI_EnableIT_0_31(EXTI_InitStruct->Line_0_31);
170           break;
171         case LL_EXTI_MODE_EVENT:
172           /* First Disable IT on provided Lines */
173           LL_EXTI_DisableIT_0_31(EXTI_InitStruct->Line_0_31);
174           /* Then Enable Event on provided Lines */
175           LL_EXTI_EnableEvent_0_31(EXTI_InitStruct->Line_0_31);
176           break;
177         case LL_EXTI_MODE_IT_EVENT:
178           /* Directly Enable IT & Event on provided Lines */
179           LL_EXTI_EnableIT_0_31(EXTI_InitStruct->Line_0_31);
180           LL_EXTI_EnableEvent_0_31(EXTI_InitStruct->Line_0_31);
181           break;
182         default:
183           status = 0x01u;
184           break;
185       }
186       if (EXTI_InitStruct->Trigger != LL_EXTI_TRIGGER_NONE)
187       {
188         switch (EXTI_InitStruct->Trigger)
189         {
190           case LL_EXTI_TRIGGER_RISING:
191             /* First Disable Falling Trigger on provided Lines */
192             LL_EXTI_DisableFallingTrig_0_31(EXTI_InitStruct->Line_0_31);
193             /* Then Enable Rising Trigger on provided Lines */
194             LL_EXTI_EnableRisingTrig_0_31(EXTI_InitStruct->Line_0_31);
195             break;
196           case LL_EXTI_TRIGGER_FALLING:
197             /* First Disable Rising Trigger on provided Lines */
198             LL_EXTI_DisableRisingTrig_0_31(EXTI_InitStruct->Line_0_31);
199             /* Then Enable Falling Trigger on provided Lines */
200             LL_EXTI_EnableFallingTrig_0_31(EXTI_InitStruct->Line_0_31);
201             break;
202           case LL_EXTI_TRIGGER_RISING_FALLING:
203             LL_EXTI_EnableRisingTrig_0_31(EXTI_InitStruct->Line_0_31);
204             LL_EXTI_EnableFallingTrig_0_31(EXTI_InitStruct->Line_0_31);
205             break;
206           default:
207             status |= 0x02u;
208             break;
209         }
210       }
211     }
212 #if defined(STM32G081xx) || defined(STM32G071xx) || defined(STM32G0C1xx) || defined(STM32G0B1xx) || defined(STM32G0B0xx)
213     /* Configure EXTI Lines in range from 32 to 63 */
214     if (EXTI_InitStruct->Line_32_63 != LL_EXTI_LINE_NONE)
215     {
216       switch (EXTI_InitStruct->Mode)
217       {
218         case LL_EXTI_MODE_IT:
219           /* First Disable Event on provided Lines */
220           LL_EXTI_DisableEvent_32_63(EXTI_InitStruct->Line_32_63);
221           /* Then Enable IT on provided Lines */
222           LL_EXTI_EnableIT_32_63(EXTI_InitStruct->Line_32_63);
223           break;
224         case LL_EXTI_MODE_EVENT:
225           /* First Disable IT on provided Lines */
226           LL_EXTI_DisableIT_32_63(EXTI_InitStruct->Line_32_63);
227           /* Then Enable Event on provided Lines */
228           LL_EXTI_EnableEvent_32_63(EXTI_InitStruct->Line_32_63);
229           break;
230         case LL_EXTI_MODE_IT_EVENT:
231           /* Directly Enable IT & Event on provided Lines */
232           LL_EXTI_EnableIT_32_63(EXTI_InitStruct->Line_32_63);
233           LL_EXTI_EnableEvent_32_63(EXTI_InitStruct->Line_32_63);
234           break;
235         default:
236           status |= 0x04u;
237           break;
238       }
239     }
240 #endif /* STM32G081xx || STM32G071xx || STM32G0C1xx || STM32G0B1xx || STM32G0B0xx */
241   }
242   /* DISABLE LineCommand */
243   else
244   {
245     /* De-configure EXTI Lines in range from 0 to 31 */
246     LL_EXTI_DisableIT_0_31(EXTI_InitStruct->Line_0_31);
247     LL_EXTI_DisableEvent_0_31(EXTI_InitStruct->Line_0_31);
248 #if defined(STM32G081xx) || defined(STM32G071xx) || defined(STM32G0C1xx) || defined(STM32G0B1xx) || defined(STM32G0B0xx)
249     /* De-configure EXTI Lines in range from 32 to 63 */
250     LL_EXTI_DisableIT_32_63(EXTI_InitStruct->Line_32_63);
251     LL_EXTI_DisableEvent_32_63(EXTI_InitStruct->Line_32_63);
252 #endif /* STM32G081xx || STM32G071xx || STM32G0C1xx || STM32G0B1xx || STM32G0B0xx */
253   }
254 
255   return status;
256 }
257 
258 /**
259   * @brief  Set each @ref LL_EXTI_InitTypeDef field to default value.
260   * @param  EXTI_InitStruct Pointer to a @ref LL_EXTI_InitTypeDef structure.
261   * @retval None
262   */
LL_EXTI_StructInit(LL_EXTI_InitTypeDef * EXTI_InitStruct)263 void LL_EXTI_StructInit(LL_EXTI_InitTypeDef *EXTI_InitStruct)
264 {
265   EXTI_InitStruct->Line_0_31      = LL_EXTI_LINE_NONE;
266 #if defined(STM32G081xx) || defined(STM32G071xx) || defined(STM32G0C1xx) || defined(STM32G0B1xx) || defined(STM32G0B0xx)
267   EXTI_InitStruct->Line_32_63     = LL_EXTI_LINE_NONE;
268 #endif /* STM32G081xx || STM32G071xx || STM32G0C1xx || STM32G0B1xx || STM32G0B0xx */
269   EXTI_InitStruct->LineCommand    = DISABLE;
270   EXTI_InitStruct->Mode           = LL_EXTI_MODE_IT;
271   EXTI_InitStruct->Trigger        = LL_EXTI_TRIGGER_FALLING;
272 }
273 
274 /**
275   * @}
276   */
277 
278 /**
279   * @}
280   */
281 
282 /**
283   * @}
284   */
285 
286 #endif /* defined (EXTI) */
287 
288 /**
289   * @}
290   */
291 
292 #endif /* USE_FULL_LL_DRIVER */
293 
294