96 lines
3.9 KiB
Plaintext
96 lines
3.9 KiB
Plaintext
/**
|
|
@page RTC_Alarm RTC Alarm Example
|
|
|
|
@verbatim
|
|
******************** (C) COPYRIGHT 2016 STMicroelectronics *******************
|
|
* @file RTC/RTC_Alarm/readme.txt
|
|
* @author MCD Application Team
|
|
* @brief Description of the RTC Alarm example.
|
|
******************************************************************************
|
|
* @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.
|
|
*
|
|
******************************************************************************
|
|
@endverbatim
|
|
|
|
@par Example Description
|
|
|
|
Configuration and generation of an RTC alarm using the RTC HAL API.
|
|
|
|
At the beginning of the main program the HAL_Init() function is called to reset
|
|
all the peripherals, initialize the Flash interface and the systick.
|
|
Then the SystemClock_Config() function is used to configure the system
|
|
clock (SYSCLK) to run at 48 MHz.
|
|
|
|
The RTC peripheral configuration is ensured by the HAL_RTC_Init() function.
|
|
This later is calling the HAL_RTC_MspInit()function which core is implementing
|
|
the configuration of the needed RTC resources according to the used hardware (CLOCK,
|
|
PWR, RTC clock source and BackUp). You may update this function to change RTC configuration.
|
|
|
|
@note LSI oscillator clock is used as RTC clock source by default.
|
|
The user can use also LSE as RTC clock source. The user uncomment the adequate
|
|
line on the main.h file.
|
|
@code
|
|
#define RTC_CLOCK_SOURCE_LSI
|
|
/* #define RTC_CLOCK_SOURCE_LSE */
|
|
@endcode
|
|
LSI oscillator clock is delivered by a 40 kHz RC.
|
|
LSE (when available on board) is delivered by a 32.768 kHz crystal.
|
|
|
|
HAL_RTC_SetDate() and HAL_RTC_SetTime() functions are called to initialize the
|
|
time and the date.
|
|
HAL_RTC_SetAlarm_IT() function is then called to initialize the Alarm feature with
|
|
interrupt mode.
|
|
|
|
In this example, the Time is set to 02:20:00 and the Alarm must be generated after
|
|
30 seconds on 02:20:30.
|
|
|
|
LED2 is turned ON when the RTC Alarm is generated correctly.
|
|
The current time is updated and displayed on the debugger in aShowTime variable.
|
|
|
|
In case of error, LED2 is toggled with a period of one second.
|
|
|
|
@note Care must be taken when using HAL_Delay(), this function provides accurate delay (in milliseconds)
|
|
based on variable incremented in SysTick ISR. This implies that if HAL_Delay() is called from
|
|
a peripheral ISR process, then the SysTick interrupt must have higher priority (numerically lower)
|
|
than the peripheral interrupt. Otherwise the caller ISR process will be blocked.
|
|
To change the SysTick interrupt priority you have to use HAL_NVIC_SetPriority() function.
|
|
|
|
@note The application need to ensure that the SysTick time base is always set to 1 millisecond
|
|
to have correct HAL operation.
|
|
|
|
@par Directory contents
|
|
|
|
- RTC/RTC_Alarm/Inc/stm32f0xx_hal_conf.h HAL configuration file
|
|
- RTC/RTC_Alarm/Inc/stm32f0xx_it.h Interrupt handlers header file
|
|
- RTC/RTC_Alarm/Inc/main.h Header for main.c module
|
|
- RTC/RTC_Alarm/Src/stm32f0xx_it.c Interrupt handlers
|
|
- RTC/RTC_Alarm/Src/main.c Main program
|
|
- RTC/RTC_Alarm/Src/stm32f0xx_hal_msp.c HAL MSP module
|
|
- RTC/RTC_Alarm/Src/system_stm32f0xx.c STM32F0xx system source file
|
|
|
|
|
|
@par Hardware and Software environment
|
|
|
|
- This example runs on STM32F070xB devices.
|
|
- This example has been tested with STMicroelectronics STM32F070RB-Nucleo RevC
|
|
board and can be easily tailored to any other supported device
|
|
and development board.
|
|
|
|
@par How to use it ?
|
|
|
|
In order to make the program work, you must do the following :
|
|
- Open your preferred toolchain
|
|
- Rebuild all files and load your image into target memory
|
|
- Run the example
|
|
|
|
|
|
|
|
*/
|