1 /**
2   ******************************************************************************
3   * @file    stm32n6xx_ll_exti.c
4   * @author  GPM Application Team
5   * @brief   EXTI LL module driver.
6   ******************************************************************************
7   * @attention
8   *
9   * Copyright (c) 2023 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 "stm32n6xx_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 STM32N6xx_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 
48 #define IS_LL_EXTI_LINE_32_63(__VALUE__)             (((__VALUE__) & ~LL_EXTI_LINE_ALL_32_63) == 0x00000000U)
49 
50 #define IS_LL_EXTI_LINE_64_95(__VALUE__)             (((__VALUE__) & ~LL_EXTI_LINE_ALL_64_95) == 0x00000000U)
51 
52 #define IS_LL_EXTI_MODE(__VALUE__)                   (((__VALUE__) == LL_EXTI_MODE_IT)            \
53                                                       || ((__VALUE__) == LL_EXTI_MODE_EVENT)         \
54                                                       || ((__VALUE__) == LL_EXTI_MODE_IT_EVENT))
55 
56 
57 #define IS_LL_EXTI_TRIGGER(__VALUE__)                (((__VALUE__) == LL_EXTI_TRIGGER_NONE)       \
58                                                       || ((__VALUE__) == LL_EXTI_TRIGGER_RISING)     \
59                                                       || ((__VALUE__) == LL_EXTI_TRIGGER_FALLING)    \
60                                                       || ((__VALUE__) == LL_EXTI_TRIGGER_RISING_FALLING))
61 
62 /**
63   * @}
64   */
65 
66 /* Private function prototypes -----------------------------------------------*/
67 
68 /* Exported functions --------------------------------------------------------*/
69 /** @addtogroup EXTI_LL_Exported_Functions
70   * @{
71   */
72 
73 /** @addtogroup EXTI_LL_EF_Init
74   * @{
75   */
76 
77 /**
78   * @brief  De-initialize the EXTI registers to their default reset values.
79   * @retval An ErrorStatus enumeration value:
80   *          - 0x00: EXTI registers are de-initialized
81   */
LL_EXTI_DeInit(void)82 uint32_t LL_EXTI_DeInit(void)
83 {
84   /* Interrupt mask register set to default reset values */
85   LL_EXTI_WriteReg(IMR1,   0x00000000U);
86   /* Event mask register set to default reset values */
87   LL_EXTI_WriteReg(EMR1,   0x00000000U);
88   /* Rising Trigger selection register set to default reset values */
89   LL_EXTI_WriteReg(RTSR1,  0x00000000U);
90   /* Falling Trigger selection register set to default reset values */
91   LL_EXTI_WriteReg(FTSR1,  0x00000000U);
92   /* Software interrupt event register set to default reset values */
93   LL_EXTI_WriteReg(SWIER1, 0x00000000U);
94   /* Pending register set to default reset values */
95   LL_EXTI_WriteReg(RPR1,   0xFFFFFFFFU);
96   LL_EXTI_WriteReg(FPR1,   0xFFFFFFFFU);
97   /* Privilege register set to default reset values */
98   LL_EXTI_WriteReg(PRIVCFGR1,  0x00000000U);
99 #if defined CPU_IN_SECURE_STATE
100   /* Secure register set to default reset values */
101   LL_EXTI_WriteReg(SECCFGR1,  0x00000000U);
102 #endif /* CPU_IN_SECURE_STATE */
103 
104   /* Interrupt mask register set to default reset values */
105   LL_EXTI_WriteReg(IMR2,   0x00000000U);
106   /* Event mask register set to default reset values */
107   LL_EXTI_WriteReg(EMR2,   0x00000000U);
108   /* Rising Trigger selection register set to default reset values */
109   LL_EXTI_WriteReg(RTSR2,  0x00000000U);
110   /* Falling Trigger selection register set to default reset values */
111   LL_EXTI_WriteReg(FTSR2,  0x00000000U);
112   /* Software interrupt event register set to default reset values */
113   LL_EXTI_WriteReg(SWIER2, 0x00000000U);
114   /* Pending register set to default reset values */
115   LL_EXTI_WriteReg(RPR2,   0xFFFFFFFFU);
116   LL_EXTI_WriteReg(FPR2,   0xFFFFFFFFU);
117   /* Privilege register set to default reset values */
118   LL_EXTI_WriteReg(PRIVCFGR2,  0x00000000U);
119 #if defined CPU_IN_SECURE_STATE
120   /* Secure register set to default reset values */
121   LL_EXTI_WriteReg(SECCFGR2,  0x00000000U);
122 #endif /* CPU_IN_SECURE_STATE */
123 
124   /* Interrupt mask register set to default reset values */
125   LL_EXTI_WriteReg(IMR3,   0x00000000U);
126   /* Event mask register set to default reset values */
127   LL_EXTI_WriteReg(EMR3,   0x00000000U);
128   /* Rising Trigger selection register set to default reset values */
129   LL_EXTI_WriteReg(RTSR3,  0x00000000U);
130   /* Falling Trigger selection register set to default reset values */
131   LL_EXTI_WriteReg(FTSR3,  0x00000000U);
132   /* Software interrupt event register set to default reset values */
133   LL_EXTI_WriteReg(SWIER3, 0x00000000U);
134   /* Pending register set to default reset values */
135   LL_EXTI_WriteReg(RPR3,   0xFFFFFFFFU);
136   LL_EXTI_WriteReg(FPR3,   0xFFFFFFFFU);
137   /* Privilege register set to default reset values */
138   LL_EXTI_WriteReg(PRIVCFGR3,  0x00000000U);
139 #if defined CPU_IN_SECURE_STATE
140   /* Secure register set to default reset values */
141   LL_EXTI_WriteReg(SECCFGR3,  0x00000000U);
142 #endif /* CPU_IN_SECURE_STATE */
143 
144   return 0x00u;
145 }
146 
147 /**
148   * @brief  Initialize the EXTI registers according to the specified parameters in EXTI_InitStruct.
149   * @param  EXTI_InitStruct pointer to a @ref LL_EXTI_InitTypeDef structure.
150   * @retval An ErrorStatus enumeration value:
151   *          - 0x00: EXTI registers are initialized
152   *          - any other value : wrong configuration
153   */
LL_EXTI_Init(LL_EXTI_InitTypeDef * EXTI_InitStruct)154 uint32_t LL_EXTI_Init(LL_EXTI_InitTypeDef *EXTI_InitStruct)
155 {
156   uint32_t status = 0x00u;
157 
158   /* Check the parameters */
159   assert_param(IS_LL_EXTI_LINE_0_31(EXTI_InitStruct->Line_0_31));
160   assert_param(IS_LL_EXTI_LINE_32_63(EXTI_InitStruct->Line_32_63));
161   assert_param(IS_LL_EXTI_LINE_64_95(EXTI_InitStruct->Line_64_95));
162   assert_param(IS_FUNCTIONAL_STATE(EXTI_InitStruct->LineCommand));
163   assert_param(IS_LL_EXTI_MODE(EXTI_InitStruct->Mode));
164 
165   /* ENABLE LineCommand */
166   if (EXTI_InitStruct->LineCommand != DISABLE)
167   {
168     assert_param(IS_LL_EXTI_TRIGGER(EXTI_InitStruct->Trigger));
169 
170     /* Configure EXTI Lines in range from 0 to 31 */
171     if (EXTI_InitStruct->Line_0_31 != LL_EXTI_LINE_NONE)
172     {
173       switch (EXTI_InitStruct->Mode)
174       {
175         case LL_EXTI_MODE_IT:
176           /* First Disable Event on provided Lines */
177           LL_EXTI_DisableEvent_0_31(EXTI_InitStruct->Line_0_31);
178           /* Then Enable IT on provided Lines */
179           LL_EXTI_EnableIT_0_31(EXTI_InitStruct->Line_0_31);
180           break;
181         case LL_EXTI_MODE_EVENT:
182           /* First Disable IT on provided Lines */
183           LL_EXTI_DisableIT_0_31(EXTI_InitStruct->Line_0_31);
184           /* Then Enable Event on provided Lines */
185           LL_EXTI_EnableEvent_0_31(EXTI_InitStruct->Line_0_31);
186           break;
187         case LL_EXTI_MODE_IT_EVENT:
188           /* Directly Enable IT & Event on provided Lines */
189           LL_EXTI_EnableIT_0_31(EXTI_InitStruct->Line_0_31);
190           LL_EXTI_EnableEvent_0_31(EXTI_InitStruct->Line_0_31);
191           break;
192         default:
193           status = 0x01u;
194           break;
195       }
196       if (EXTI_InitStruct->Trigger != LL_EXTI_TRIGGER_NONE)
197       {
198         switch (EXTI_InitStruct->Trigger)
199         {
200           case LL_EXTI_TRIGGER_RISING:
201             /* First Disable Falling Trigger on provided Lines */
202             LL_EXTI_DisableFallingTrig_0_31(EXTI_InitStruct->Line_0_31);
203             /* Then Enable Rising Trigger on provided Lines */
204             LL_EXTI_EnableRisingTrig_0_31(EXTI_InitStruct->Line_0_31);
205             break;
206           case LL_EXTI_TRIGGER_FALLING:
207             /* First Disable Rising Trigger on provided Lines */
208             LL_EXTI_DisableRisingTrig_0_31(EXTI_InitStruct->Line_0_31);
209             /* Then Enable Falling Trigger on provided Lines */
210             LL_EXTI_EnableFallingTrig_0_31(EXTI_InitStruct->Line_0_31);
211             break;
212           case LL_EXTI_TRIGGER_RISING_FALLING:
213             LL_EXTI_EnableRisingTrig_0_31(EXTI_InitStruct->Line_0_31);
214             LL_EXTI_EnableFallingTrig_0_31(EXTI_InitStruct->Line_0_31);
215             break;
216           default:
217             status |= 0x02u;
218             break;
219         }
220       }
221     }
222     /* Configure EXTI Lines in range from 32 to 63 */
223     if (EXTI_InitStruct->Line_32_63 != LL_EXTI_LINE_NONE)
224     {
225       switch (EXTI_InitStruct->Mode)
226       {
227         case LL_EXTI_MODE_IT:
228           /* First Disable Event on provided Lines */
229           LL_EXTI_DisableEvent_32_63(EXTI_InitStruct->Line_32_63);
230           /* Then Enable IT on provided Lines */
231           LL_EXTI_EnableIT_32_63(EXTI_InitStruct->Line_32_63);
232           break;
233         case LL_EXTI_MODE_EVENT:
234           /* First Disable IT on provided Lines */
235           LL_EXTI_DisableIT_32_63(EXTI_InitStruct->Line_32_63);
236           /* Then Enable Event on provided Lines */
237           LL_EXTI_EnableEvent_32_63(EXTI_InitStruct->Line_32_63);
238           break;
239         case LL_EXTI_MODE_IT_EVENT:
240           /* Directly Enable IT & Event on provided Lines */
241           LL_EXTI_EnableIT_32_63(EXTI_InitStruct->Line_32_63);
242           LL_EXTI_EnableEvent_32_63(EXTI_InitStruct->Line_32_63);
243           break;
244         default:
245           status |= 0x04u;
246           break;
247       }
248       if (EXTI_InitStruct->Trigger != LL_EXTI_TRIGGER_NONE)
249       {
250         switch (EXTI_InitStruct->Trigger)
251         {
252           case LL_EXTI_TRIGGER_RISING:
253             /* First Disable Falling Trigger on provided Lines */
254             LL_EXTI_DisableFallingTrig_32_63(EXTI_InitStruct->Line_32_63);
255             /* Then Enable IT on provided Lines */
256             LL_EXTI_EnableRisingTrig_32_63(EXTI_InitStruct->Line_32_63);
257             break;
258           case LL_EXTI_TRIGGER_FALLING:
259             /* First Disable Rising Trigger on provided Lines */
260             LL_EXTI_DisableRisingTrig_32_63(EXTI_InitStruct->Line_32_63);
261             /* Then Enable Falling Trigger on provided Lines */
262             LL_EXTI_EnableFallingTrig_32_63(EXTI_InitStruct->Line_32_63);
263             break;
264           case LL_EXTI_TRIGGER_RISING_FALLING:
265             LL_EXTI_EnableRisingTrig_32_63(EXTI_InitStruct->Line_32_63);
266             LL_EXTI_EnableFallingTrig_32_63(EXTI_InitStruct->Line_32_63);
267             break;
268           default:
269             status |= 0x08u;
270             break;
271         }
272       }
273     }
274     /* Configure EXTI Lines in range from 64 to 95 */
275     if (EXTI_InitStruct->Line_64_95 != LL_EXTI_LINE_NONE)
276     {
277       switch (EXTI_InitStruct->Mode)
278       {
279         case LL_EXTI_MODE_IT:
280           /* First Disable Event on provided Lines */
281           LL_EXTI_DisableEvent_64_95(EXTI_InitStruct->Line_64_95);
282           /* Then Enable IT on provided Lines */
283           LL_EXTI_EnableIT_64_95(EXTI_InitStruct->Line_64_95);
284           break;
285         case LL_EXTI_MODE_EVENT:
286           /* First Disable IT on provided Lines */
287           LL_EXTI_DisableIT_64_95(EXTI_InitStruct->Line_64_95);
288           /* Then Enable Event on provided Lines */
289           LL_EXTI_EnableEvent_64_95(EXTI_InitStruct->Line_64_95);
290           break;
291         case LL_EXTI_MODE_IT_EVENT:
292           /* Directly Enable IT & Event on provided Lines */
293           LL_EXTI_EnableIT_64_95(EXTI_InitStruct->Line_64_95);
294           LL_EXTI_EnableEvent_64_95(EXTI_InitStruct->Line_64_95);
295           break;
296         default:
297           status |= 0x10u;
298           break;
299       }
300       if (EXTI_InitStruct->Trigger != LL_EXTI_TRIGGER_NONE)
301       {
302         switch (EXTI_InitStruct->Trigger)
303         {
304           case LL_EXTI_TRIGGER_RISING:
305             /* First Disable Falling Trigger on provided Lines */
306             LL_EXTI_DisableFallingTrig_64_95(EXTI_InitStruct->Line_64_95);
307             /* Then Enable IT on provided Lines */
308             LL_EXTI_EnableRisingTrig_64_95(EXTI_InitStruct->Line_64_95);
309             break;
310           case LL_EXTI_TRIGGER_FALLING:
311             /* First Disable Rising Trigger on provided Lines */
312             LL_EXTI_DisableRisingTrig_64_95(EXTI_InitStruct->Line_64_95);
313             /* Then Enable Falling Trigger on provided Lines */
314             LL_EXTI_EnableFallingTrig_64_95(EXTI_InitStruct->Line_64_95);
315             break;
316           case LL_EXTI_TRIGGER_RISING_FALLING:
317             LL_EXTI_EnableRisingTrig_64_95(EXTI_InitStruct->Line_64_95);
318             LL_EXTI_EnableFallingTrig_64_95(EXTI_InitStruct->Line_64_95);
319             break;
320           default:
321             status |= 0x20u;
322             break;
323         }
324       }
325     }
326   }
327   /* DISABLE LineCommand */
328   else
329   {
330     /* De-configure EXTI Lines in range from 0 to 31 */
331     LL_EXTI_DisableIT_0_31(EXTI_InitStruct->Line_0_31);
332     LL_EXTI_DisableEvent_0_31(EXTI_InitStruct->Line_0_31);
333     /* De-configure EXTI Lines in range from 32 to 63 */
334     LL_EXTI_DisableIT_32_63(EXTI_InitStruct->Line_32_63);
335     LL_EXTI_DisableEvent_32_63(EXTI_InitStruct->Line_32_63);
336     /* De-configure EXTI Lines in range from 64 to 95 */
337     LL_EXTI_DisableIT_64_95(EXTI_InitStruct->Line_64_95);
338     LL_EXTI_DisableEvent_64_95(EXTI_InitStruct->Line_64_95);
339   }
340   return status;
341 }
342 
343 /**
344   * @brief  Set each @ref LL_EXTI_InitTypeDef field to default value.
345   * @param  EXTI_InitStruct Pointer to a @ref LL_EXTI_InitTypeDef structure.
346   * @retval None
347   */
LL_EXTI_StructInit(LL_EXTI_InitTypeDef * EXTI_InitStruct)348 void LL_EXTI_StructInit(LL_EXTI_InitTypeDef *EXTI_InitStruct)
349 {
350   EXTI_InitStruct->Line_0_31      = LL_EXTI_LINE_NONE;
351   EXTI_InitStruct->Line_32_63     = LL_EXTI_LINE_NONE;
352   EXTI_InitStruct->Line_64_95     = LL_EXTI_LINE_NONE;
353   EXTI_InitStruct->LineCommand    = DISABLE;
354   EXTI_InitStruct->Mode           = LL_EXTI_MODE_IT;
355   EXTI_InitStruct->Trigger        = LL_EXTI_TRIGGER_FALLING;
356 }
357 
358 /**
359   * @}
360   */
361 
362 /**
363   * @}
364   */
365 
366 /**
367   * @}
368   */
369 
370 #endif /* defined (EXTI) */
371 
372 /**
373   * @}
374   */
375 
376 #endif /* USE_FULL_LL_DRIVER */
377 
378