Outline ![]()
Files ![]()
loading...
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
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
/**
******************************************************************************
* @file stm32f4xx_ll_wwdg.h
* @author MCD Application Team
* @brief Header file of WWDG LL module.
******************************************************************************
* @attention
*
* Copyright (c) 2016 STMicroelectronics.
* All rights reserved.
*
* This software is licensed under terms that can be found in the LICENSE file
* in the root directory of this software component.
* If no LICENSE file comes with this software, it is provided AS-IS.
*
******************************************************************************
*/
/* Define to prevent recursive inclusion -------------------------------------*/
#ifndef STM32F4xx_LL_WWDG_H
#define STM32F4xx_LL_WWDG_H
#ifdef __cplusplus
extern "C" {
#endif
/* Includes ------------------------------------------------------------------*/
#include "stm32f4xx.h"
/** @addtogroup STM32F4xx_LL_Driver
* @{
*/
#if defined (WWDG)
/** @defgroup WWDG_LL WWDG
* @{
*/
/* Private types -------------------------------------------------------------*/
/* Private variables ---------------------------------------------------------*/
/* Private constants ---------------------------------------------------------*/
/* Private macros ------------------------------------------------------------*/
/* Exported types ------------------------------------------------------------*/
/* Exported constants --------------------------------------------------------*/
/** @defgroup WWDG_LL_Exported_Constants WWDG Exported Constants
* @{
*/
/** @defgroup WWDG_LL_EC_IT IT Defines
* @brief IT defines which can be used with LL_WWDG_ReadReg and LL_WWDG_WriteReg functions
* @{
*/
#define LL_WWDG_CFR_EWI WWDG_CFR_EWI
/**
* @}
*/
/** @defgroup WWDG_LL_EC_PRESCALER PRESCALER
* @{
*/
#define LL_WWDG_PRESCALER_1 0x00000000u /*!< WWDG counter clock = (PCLK1/4096)/1 */
#define LL_WWDG_PRESCALER_2 WWDG_CFR_WDGTB_0 /*!< WWDG counter clock = (PCLK1/4096)/2 */
#define LL_WWDG_PRESCALER_4 WWDG_CFR_WDGTB_1 /*!< WWDG counter clock = (PCLK1/4096)/4 */
#define LL_WWDG_PRESCALER_8 (WWDG_CFR_WDGTB_0 | WWDG_CFR_WDGTB_1) /*!< WWDG counter clock = (PCLK1/4096)/8 */
/**
* @}
*/
/**
* @}
*/
/* Exported macro ------------------------------------------------------------*/
/** @defgroup WWDG_LL_Exported_Macros WWDG Exported Macros
* @{
*/
/** @defgroup WWDG_LL_EM_WRITE_READ Common Write and read registers macros
* @{
*/
/**
* @brief Write a value in WWDG register
* @param __INSTANCE__ WWDG Instance
* @param __REG__ Register to be written
* @param __VALUE__ Value to be written in the register
* @retval None
*/
#define LL_WWDG_WriteReg(__INSTANCE__, __REG__, __VALUE__) WRITE_REG(__INSTANCE__->__REG__, (__VALUE__))
/**
* @brief Read a value in WWDG register
* @param __INSTANCE__ WWDG Instance
* @param __REG__ Register to be read
* @retval Register value
*/
#define LL_WWDG_ReadReg(__INSTANCE__, __REG__) READ_REG(__INSTANCE__->__REG__)
/**
* @}
*/
/**
* @}
*/
/* Exported functions --------------------------------------------------------*/
/** @defgroup WWDG_LL_Exported_Functions WWDG Exported Functions
* @{
*/
/** @defgroup WWDG_LL_EF_Configuration Configuration
* @{
*/
/**
* @brief Enable Window Watchdog. The watchdog is always disabled after a reset.
* @note It is enabled by setting the WDGA bit in the WWDG_CR register,
* then it cannot be disabled again except by a reset.
* This bit is set by software and only cleared by hardware after a reset.
* When WDGA = 1, the watchdog can generate a reset.
* @rmtoll CR WDGA LL_WWDG_Enable
* @param WWDGx WWDG Instance
* @retval None
*/
__STATIC_INLINE void LL_WWDG_Enable(WWDG_TypeDef *WWDGx)
{
SET_BIT(WWDGx->CR, WWDG_CR_WDGA);
}
/**
* @brief Checks if Window Watchdog is enabled
* @rmtoll CR WDGA LL_WWDG_IsEnabled
* @param WWDGx WWDG Instance
* @retval State of bit (1 or 0).
*/
__STATIC_INLINE uint32_t LL_WWDG_IsEnabled(WWDG_TypeDef *WWDGx)
{
return ((READ_BIT(WWDGx->CR, WWDG_CR_WDGA) == (WWDG_CR_WDGA)) ? 1UL : 0UL);
}
/**
* @brief Set the Watchdog counter value to provided value (7-bits T[6:0])
* @note When writing to the WWDG_CR register, always write 1 in the MSB b6 to avoid generating an immediate reset
* This counter is decremented every (4096 x 2expWDGTB) PCLK cycles
* A reset is produced when it rolls over from 0x40 to 0x3F (bit T6 becomes cleared)
* Setting the counter lower then 0x40 causes an immediate reset (if WWDG enabled)
* @rmtoll CR T LL_WWDG_SetCounter
* @param WWDGx WWDG Instance
* @param Counter 0..0x7F (7 bit counter value)
* @retval None
*/
__STATIC_INLINE void LL_WWDG_SetCounter(WWDG_TypeDef *WWDGx, uint32_t Counter)
{
MODIFY_REG(WWDGx->CR, WWDG_CR_T, Counter);
}
/**
* @brief Return current Watchdog Counter Value (7 bits counter value)
* @rmtoll CR T LL_WWDG_GetCounter
* @param WWDGx WWDG Instance
* @retval 7 bit Watchdog Counter value
*/
__STATIC_INLINE uint32_t LL_WWDG_GetCounter(WWDG_TypeDef *WWDGx)
{
return (READ_BIT(WWDGx->CR, WWDG_CR_T));
}
/**
* @brief Set the time base of the prescaler (WDGTB).
* @note Prescaler is used to apply ratio on PCLK clock, so that Watchdog counter
* is decremented every (4096 x 2expWDGTB) PCLK cycles
* @rmtoll CFR WDGTB LL_WWDG_SetPrescaler
* @param WWDGx WWDG Instance
* @param Prescaler This parameter can be one of the following values:
* @arg @ref LL_WWDG_PRESCALER_1
* @arg @ref LL_WWDG_PRESCALER_2
* @arg @ref LL_WWDG_PRESCALER_4
* @arg @ref LL_WWDG_PRESCALER_8
* @retval None
*/
__STATIC_INLINE void LL_WWDG_SetPrescaler(WWDG_TypeDef *WWDGx, uint32_t Prescaler)
{
MODIFY_REG(WWDGx->CFR, WWDG_CFR_WDGTB, Prescaler);
}
/**
* @brief Return current Watchdog Prescaler Value
* @rmtoll CFR WDGTB LL_WWDG_GetPrescaler
* @param WWDGx WWDG Instance
* @retval Returned value can be one of the following values:
* @arg @ref LL_WWDG_PRESCALER_1
* @arg @ref LL_WWDG_PRESCALER_2
* @arg @ref LL_WWDG_PRESCALER_4
* @arg @ref LL_WWDG_PRESCALER_8
*/
__STATIC_INLINE uint32_t LL_WWDG_GetPrescaler(WWDG_TypeDef *WWDGx)
{
return (READ_BIT(WWDGx->CFR, WWDG_CFR_WDGTB));
}
/**
* @brief Set the Watchdog Window value to be compared to the downcounter (7-bits W[6:0]).
* @note This window value defines when write in the WWDG_CR register
* to program Watchdog counter is allowed.
* Watchdog counter value update must occur only when the counter value
* is lower than the Watchdog window register value.
* Otherwise, a MCU reset is generated if the 7-bit Watchdog counter value
* (in the control register) is refreshed before the downcounter has reached
* the watchdog window register value.
* Physically is possible to set the Window lower then 0x40 but it is not recommended.
* To generate an immediate reset, it is possible to set the Counter lower than 0x40.
* @rmtoll CFR W LL_WWDG_SetWindow
* @param WWDGx WWDG Instance
* @param Window 0x00..0x7F (7 bit Window value)
* @retval None
*/
__STATIC_INLINE void LL_WWDG_SetWindow(WWDG_TypeDef *WWDGx, uint32_t Window)
{
MODIFY_REG(WWDGx->CFR, WWDG_CFR_W, Window);
}
/**
* @brief Return current Watchdog Window Value (7 bits value)
* @rmtoll CFR W LL_WWDG_GetWindow
* @param WWDGx WWDG Instance
* @retval 7 bit Watchdog Window value
*/
__STATIC_INLINE uint32_t LL_WWDG_GetWindow(WWDG_TypeDef *WWDGx)
{
return (READ_BIT(WWDGx->CFR, WWDG_CFR_W));
}
/**
* @}
*/
/** @defgroup WWDG_LL_EF_FLAG_Management FLAG_Management
* @{
*/
/**
* @brief Indicates if the WWDG Early Wakeup Interrupt Flag is set or not.
* @note This bit is set by hardware when the counter has reached the value 0x40.
* It must be cleared by software by writing 0.
* A write of 1 has no effect. This bit is also set if the interrupt is not enabled.
* @rmtoll SR EWIF LL_WWDG_IsActiveFlag_EWKUP
* @param WWDGx WWDG Instance
* @retval State of bit (1 or 0).
*/
__STATIC_INLINE uint32_t LL_WWDG_IsActiveFlag_EWKUP(WWDG_TypeDef *WWDGx)
{
return ((READ_BIT(WWDGx->SR, WWDG_SR_EWIF) == (WWDG_SR_EWIF)) ? 1UL : 0UL);
}
/**
* @brief Clear WWDG Early Wakeup Interrupt Flag (EWIF)
* @rmtoll SR EWIF LL_WWDG_ClearFlag_EWKUP
* @param WWDGx WWDG Instance
* @retval None
*/
__STATIC_INLINE void LL_WWDG_ClearFlag_EWKUP(WWDG_TypeDef *WWDGx)
{
WRITE_REG(WWDGx->SR, ~WWDG_SR_EWIF);
}
/**
* @}
*/
/** @defgroup WWDG_LL_EF_IT_Management IT_Management
* @{
*/
/**
* @brief Enable the Early Wakeup Interrupt.
* @note When set, an interrupt occurs whenever the counter reaches value 0x40.
* This interrupt is only cleared by hardware after a reset
* @rmtoll CFR EWI LL_WWDG_EnableIT_EWKUP
* @param WWDGx WWDG Instance
* @retval None
*/
__STATIC_INLINE void LL_WWDG_EnableIT_EWKUP(WWDG_TypeDef *WWDGx)
{
SET_BIT(WWDGx->CFR, WWDG_CFR_EWI);
}
/**
* @brief Check if Early Wakeup Interrupt is enabled
* @rmtoll CFR EWI LL_WWDG_IsEnabledIT_EWKUP
* @param WWDGx WWDG Instance
* @retval State of bit (1 or 0).
*/
__STATIC_INLINE uint32_t LL_WWDG_IsEnabledIT_EWKUP(WWDG_TypeDef *WWDGx)
{
return ((READ_BIT(WWDGx->CFR, WWDG_CFR_EWI) == (WWDG_CFR_EWI)) ? 1UL : 0UL);
}
/**
* @}
*/
/**
* @}
*/
/**
* @}
*/
#endif /* WWDG */
/**
* @}
*/
#ifdef __cplusplus
}
#endif
#endif /* STM32F4xx_LL_WWDG_H */
Details ![]()
Show: from Types: Columns: ![]( "Show Project Names")
![]( "Show Locations")
![]( "Show Referring Symbols")
![]( "Show Scope")
This file uses the notable symbols shown below. Click anywhere in the file to view more details.