Outline ![]()
Files ![]()
loading (2/3)...
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
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
/**
******************************************************************************
* @file Examples_LL/RTC/RTC_Alarm_Init/Src/main.c
* @author MCD Application Team
* @brief This example code shows how to use STM32F4xx RTC LL API to configure
* an alarm.
* Peripheral initialization done using LL initialization function.
******************************************************************************
* @attention
*
* Copyright (c) 2017 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.
*
******************************************************************************
*/
/* Includes ------------------------------------------------------------------*/
#include "main.h"
/** @addtogroup STM32F4xx_LL_Examples
* @{
*/
/** @addtogroup RTC_Alarm_Init
* @{
*/
/* Private typedef -----------------------------------------------------------*/
/* Private define ------------------------------------------------------------*/
/* Oscillator time-out values */
#define LSI_TIMEOUT_VALUE ((uint32_t)2) /* 2 ms */
#define LSE_TIMEOUT_VALUE ((uint32_t)5000) /* 5 s */
/* Defines related to Clock configuration */
/* Uncomment to enable the adequate Clock Source */
#define RTC_CLOCK_SOURCE_LSI
/*#define RTC_CLOCK_SOURCE_LSE*/
#ifdef RTC_CLOCK_SOURCE_LSI
/* ck_apre=LSIFreq/(ASYNC prediv + 1) with LSIFreq=32 kHz RC */
#define RTC_ASYNCH_PREDIV ((uint32_t)0x7F)
/* ck_spre=ck_apre/(SYNC prediv + 1) = 1 Hz */
#define RTC_SYNCH_PREDIV ((uint32_t)0x00F9)
#endif
#ifdef RTC_CLOCK_SOURCE_LSE
/* ck_apre=LSEFreq/(ASYNC prediv + 1) = 256Hz with LSEFreq=32768Hz */
#define RTC_ASYNCH_PREDIV ((uint32_t)0x7F)
/* ck_spre=ck_apre/(SYNC prediv + 1) = 1 Hz */
#define RTC_SYNCH_PREDIV ((uint32_t)0x00FF)
#endif
/* Private macro -------------------------------------------------------------*/
/* Private variables ---------------------------------------------------------*/
/* Buffers used for displaying Time and Date */
uint8_t aShowTime[50] = {0};
uint8_t aShowDate[50] = {0};
#if (USE_TIMEOUT == 1)
uint32_t Timeout = 0; /* Variable used for Timeout management */
#endif /* USE_TIMEOUT */
/* Private function prototypes -----------------------------------------------*/
void SystemClock_Config(void);
void Configure_RTC(void);
void Configure_RTC_Alarm(void);
void Show_RTC_Calendar(void);
void LED_Init(void);
void LED_On(void);
void LED_Blinking(uint32_t Period);
/* Private functions ---------------------------------------------------------*/
/**
* @brief Main program
* @param None
* @retval None
*/
int main(void)
{
/* Configure the system clock to 100 MHz */
SystemClock_Config();
/* Initialize LED2 */
LED_Init();
/*##-1- Configure the RTC peripheral #######################################*/
Configure_RTC();
/*##-2- Configure Alarm ####################################################*/
/* Configure RTC Alarm */
Configure_RTC_Alarm();
/* Infinite loop */
while (1)
{
/*##-3- Display the updated Time and Date ################################*/
Show_RTC_Calendar();
}
}
/**
* @brief Configure RTC.
* @param None
* @retval None
*/
void Configure_RTC(void)
{
LL_RTC_InitTypeDef rtc_initstruct;
/*##-1- Enables the PWR Clock and Enables access to the backup domain #######*/
/* To change the source clock of the RTC feature (LSE, LSI), you have to:
- Enable the power clock
- Enable write access to configure the RTC clock source (to be done once after reset).
- Reset the Back up Domain
- Configure the needed RTC clock source */
LL_APB1_GRP1_EnableClock(LL_APB1_GRP1_PERIPH_PWR);
LL_PWR_EnableBkUpAccess();
/*##-2- Configure LSE/LSI as RTC clock source ###############################*/
#ifdef RTC_CLOCK_SOURCE_LSE
/* Enable LSE only if disabled.*/
if (LL_RCC_LSE_IsReady() == 0)
{
LL_RCC_ForceBackupDomainReset();
LL_RCC_ReleaseBackupDomainReset();
LL_RCC_LSE_Enable();
#if (USE_TIMEOUT == 1)
Timeout = LSE_TIMEOUT_VALUE;
#endif /* USE_TIMEOUT */
while (LL_RCC_LSE_IsReady() != 1)
{
#if (USE_TIMEOUT == 1)
if (LL_SYSTICK_IsActiveCounterFlag())
{
Timeout --;
}
if (Timeout == 0)
{
/* LSE activation error */
LED_Blinking(LED_BLINK_ERROR);
}
#endif /* USE_TIMEOUT */
}
LL_RCC_SetRTCClockSource(LL_RCC_RTC_CLKSOURCE_LSE);
/*##-3- Enable RTC peripheral Clocks #######################################*/
/* Enable RTC Clock */
LL_RCC_EnableRTC();
}
#elif defined(RTC_CLOCK_SOURCE_LSI)
/* Enable LSI */
LL_RCC_LSI_Enable();
#if (USE_TIMEOUT == 1)
Timeout = LSI_TIMEOUT_VALUE;
#endif /* USE_TIMEOUT */
while (LL_RCC_LSI_IsReady() != 1)
{
#if (USE_TIMEOUT == 1)
if (LL_SYSTICK_IsActiveCounterFlag())
{
Timeout --;
}
if (Timeout == 0)
{
/* LSI activation error */
LED_Blinking(LED_BLINK_ERROR);
}
#endif /* USE_TIMEOUT */
}
LL_RCC_ForceBackupDomainReset();
LL_RCC_ReleaseBackupDomainReset();
LL_RCC_SetRTCClockSource(LL_RCC_RTC_CLKSOURCE_LSI);
/*##-3- Enable RTC peripheral Clocks #######################################*/
/* Enable RTC Clock */
LL_RCC_EnableRTC();
#else
#error "configure clock for RTC"
#endif
/*##-4 Configure RTC ######################################################*/
/* Configure RTC prescaler and RTC data registers */
if (LL_RTC_DeInit(RTC) != SUCCESS)
{
/* Initialization Error */
LED_Blinking(LED_BLINK_ERROR);
}
/* Set fields of initialization structure:
- Hour Format = Format 12
- Asynch Prediv = Value according to source clock
- Synch Prediv = Value according to source clock
*/
rtc_initstruct.HourFormat = LL_RTC_HOURFORMAT_AMPM;
rtc_initstruct.AsynchPrescaler = RTC_ASYNCH_PREDIV;
rtc_initstruct.SynchPrescaler = RTC_SYNCH_PREDIV;
/* Initialize RTC instance according to parameters defined in initialization structure. */
if (LL_RTC_Init(RTC, &rtc_initstruct) != SUCCESS)
{
/* Initialization Error */
LED_Blinking(LED_BLINK_ERROR);
}
}
/**
* @brief Configure the current time and date and set alarm.
* Note __LL_RTC_CONVERT_BIN2BCD helper macro can be used if user wants to
* provide directly the decimal value:
* LL_RTC_DATE_Config(RTC, LL_RTC_WEEKDAY_MONDAY,
* __LL_RTC_CONVERT_BIN2BCD(31), (...))
* @param None
* @retval None
*/
void Configure_RTC_Alarm(void)
{
LL_RTC_DateTypeDef rtc_date_initstruct;
LL_RTC_TimeTypeDef rtc_time_initstruct;
LL_RTC_AlarmTypeDef rtc_alarm_initstruct;
/*## Configure the Date ################################################*/
/* Set Date: Friday December 29th 2016 */
rtc_date_initstruct.WeekDay = LL_RTC_WEEKDAY_FRIDAY;
rtc_date_initstruct.Day = 0x29;
rtc_date_initstruct.Month = LL_RTC_MONTH_DECEMBER;
rtc_date_initstruct.Year = 0x16;
/* Initialize RTC date according to parameters defined in initialization structure. */
if (LL_RTC_DATE_Init(RTC, LL_RTC_FORMAT_BCD, &rtc_date_initstruct) != SUCCESS)
{
/* Initialization Error */
LED_Blinking(LED_BLINK_ERROR);
}
/*## Configure the Time ################################################*/
/* Set Time: 11:59:55 PM*/
rtc_time_initstruct.TimeFormat = LL_RTC_TIME_FORMAT_PM;
rtc_time_initstruct.Hours = 0x11;
rtc_time_initstruct.Minutes = 0x59;
rtc_time_initstruct.Seconds = 0x55;
/* Initialize RTC time according to parameters defined in initialization structure. */
if (LL_RTC_TIME_Init(RTC, LL_RTC_FORMAT_BCD, &rtc_time_initstruct) != SUCCESS)
{
/* Initialization Error */
LED_Blinking(LED_BLINK_ERROR);
}
/*## Configure the RTC Alarm peripheral #################################*/
/* Set Alarm to 12:00:25 */
rtc_alarm_initstruct.AlarmTime.TimeFormat = LL_RTC_ALMA_TIME_FORMAT_AM;
rtc_alarm_initstruct.AlarmTime.Hours = 0x12;
rtc_alarm_initstruct.AlarmTime.Minutes = 0x00;
rtc_alarm_initstruct.AlarmTime.Seconds = 0x25;
/* RTC Alarm Generation: Alarm on Hours, Minutes and Seconds (ignore date/weekday)*/
rtc_alarm_initstruct.AlarmMask = LL_RTC_ALMA_MASK_DATEWEEKDAY;
rtc_alarm_initstruct.AlarmDateWeekDaySel = LL_RTC_ALMA_DATEWEEKDAYSEL_DATE;
rtc_alarm_initstruct.AlarmDateWeekDay = 0x01;
/* Initialize ALARM A according to parameters defined in initialization structure. */
if (LL_RTC_ALMA_Init(RTC, LL_RTC_FORMAT_BCD, &rtc_alarm_initstruct) != SUCCESS)
{
/* Initialization Error */
LED_Blinking(LED_BLINK_ERROR);
}
/* Disable the write protection for RTC registers */
LL_RTC_DisableWriteProtection(RTC);
/* Enable Alarm*/
LL_RTC_ALMA_Enable(RTC);
/* Clear the Alarm interrupt pending bit */
LL_RTC_ClearFlag_ALRA(RTC);
/* Enable IT Alarm */
LL_RTC_EnableIT_ALRA(RTC);
/* Enable the write protection for RTC registers */
LL_RTC_EnableWriteProtection(RTC);
/* RTC Alarm Interrupt Configuration: EXTI configuration */
LL_EXTI_EnableIT_0_31(LL_EXTI_LINE_17);
LL_EXTI_EnableRisingTrig_0_31(LL_EXTI_LINE_17);
/*## Configure the NVIC for RTC Alarm ##################################*/
NVIC_SetPriority(RTC_Alarm_IRQn, 0x0F);
NVIC_EnableIRQ(RTC_Alarm_IRQn);
}
/**
* @brief Display the current time and date.
* @param None
* @retval None
*/
void Show_RTC_Calendar(void)
{
/* Note: need to convert in decimal value in using __LL_RTC_CONVERT_BCD2BIN helper macro */
/* Display time Format : hh:mm:ss */
sprintf((char*)aShowTime,"%.2d:%.2d:%.2d", __LL_RTC_CONVERT_BCD2BIN(LL_RTC_TIME_GetHour(RTC)),
__LL_RTC_CONVERT_BCD2BIN(LL_RTC_TIME_GetMinute(RTC)),
__LL_RTC_CONVERT_BCD2BIN(LL_RTC_TIME_GetSecond(RTC)));
/* Display date Format : mm-dd-yy */
sprintf((char*)aShowDate,"%.2d-%.2d-%.2d", __LL_RTC_CONVERT_BCD2BIN(LL_RTC_DATE_GetMonth(RTC)),
__LL_RTC_CONVERT_BCD2BIN(LL_RTC_DATE_GetDay(RTC)),
2000 + __LL_RTC_CONVERT_BCD2BIN(LL_RTC_DATE_GetYear(RTC)));
}
/**
* @brief Initialize LED2.
* @param None
* @retval None
*/
void LED_Init(void)
{
/* Enable the LED2 Clock */
LED2_GPIO_CLK_ENABLE();
/* Configure IO in output push-pull mode to drive external LED2 */
LL_GPIO_SetPinMode(LED2_GPIO_PORT, LED2_PIN, LL_GPIO_MODE_OUTPUT);
/* Reset value is LL_GPIO_OUTPUT_PUSHPULL */
//LL_GPIO_SetPinOutputType(LED2_GPIO_PORT, LED2_PIN, LL_GPIO_OUTPUT_PUSHPULL);
/* Reset value is LL_GPIO_SPEED_FREQ_LOW */
//LL_GPIO_SetPinSpeed(LED2_GPIO_PORT, LED2_PIN, LL_GPIO_SPEED_FREQ_LOW);
/* Reset value is LL_GPIO_PULL_NO */
//LL_GPIO_SetPinPull(LED2_GPIO_PORT, LED2_PIN, LL_GPIO_PULL_NO);
}
/**
* @brief Turn-on LED2.
* @param None
* @retval None
*/
void LED_On(void)
{
/* Turn LED2 on */
LL_GPIO_SetOutputPin(LED2_GPIO_PORT, LED2_PIN);
}
/**
* @brief Set LED2 to Blinking mode for an infinite loop (toggle period based on value provided as input parameter).
* @param Period : Period of time (in ms) between each togg ling of LED
* This parameter can be user defined values. Pre-defined values used in that example are :
* @arg LED_BLINK_FAST : Fast Blinking
* @arg LED_BLINK_SLOW : Slow Blinking
* @arg LED_BLINK_ERROR : Error specific Blinking
* @retval None
*/
void LED_Blinking(uint32_t Period)
{
/* Toggle IO in an infinite loop */
while (1)
{
LL_GPIO_TogglePin(LED2_GPIO_PORT, LED2_PIN);
LL_mDelay(Period);
}
}
/**
* @brief System Clock Configuration
* The system Clock is configured as follow :
* System Clock source = PLL (HSE)
* SYSCLK(Hz) = 100000000
* HCLK(Hz) = 100000000
* AHB Prescaler = 1
* APB1 Prescaler = 2
* APB2 Prescaler = 1
* HSE Frequency(Hz) = 8000000
* PLL_M = 8
* PLL_N = 400
* PLL_P = 4
* VDD(V) = 3.3
* Main regulator output voltage = Scale1 mode
* Flash Latency(WS) = 3
* @param None
* @retval None
*/
void SystemClock_Config(void)
{
/* Enable HSE oscillator */
LL_RCC_HSE_EnableBypass();
LL_RCC_HSE_Enable();
while(LL_RCC_HSE_IsReady() != 1)
{
};
/* Set FLASH latency */
LL_FLASH_SetLatency(LL_FLASH_LATENCY_3);
/* Main PLL configuration and activation */
LL_RCC_PLL_ConfigDomain_SYS(LL_RCC_PLLSOURCE_HSE, LL_RCC_PLLM_DIV_8, 400, LL_RCC_PLLP_DIV_4);
LL_RCC_PLL_Enable();
while(LL_RCC_PLL_IsReady() != 1)
{
};
/* Sysclk activation on the main PLL */
LL_RCC_SetAHBPrescaler(LL_RCC_SYSCLK_DIV_1);
LL_RCC_SetSysClkSource(LL_RCC_SYS_CLKSOURCE_PLL);
while(LL_RCC_GetSysClkSource() != LL_RCC_SYS_CLKSOURCE_STATUS_PLL)
{
};
/* Set APB1 & APB2 prescaler */
LL_RCC_SetAPB1Prescaler(LL_RCC_APB1_DIV_2);
LL_RCC_SetAPB2Prescaler(LL_RCC_APB2_DIV_1);
/* Set systick to 1ms */
SysTick_Config(100000000 / 1000);
/* Update CMSIS variable (which can be updated also through SystemCoreClockUpdate function) */
SystemCoreClock = 100000000;
}
/******************************************************************************/
/* USER IRQ HANDLER TREATMENT */
/******************************************************************************/
/**
* @brief Alarm callback
* @param None
* @retval None
*/
void Alarm_Callback(void)
{
/* Turn LED2 on: Alarm generation */
LED_On();
}
#ifdef USE_FULL_ASSERT
/**
* @brief Reports the name of the source file and the source line number
* where the assert_param error has occurred.
* @param file: pointer to the source file name
* @param line: assert_param error line source number
* @retval None
*/
void assert_failed(uint8_t *file, uint32_t line)
{
/* User can add his own implementation to report the file name and line number,
ex: printf("Wrong parameters value: file %s on line %d\r\n", file, line) */
/* Infinite loop */
while (1)
{
}
}
#endif
/**
* @}
*/
/**
* @}
*/
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.