464 lines
13 KiB
C
464 lines
13 KiB
C
/* USER CODE BEGIN Header */
|
|
/**
|
|
******************************************************************************
|
|
* @file RTC/RTC_LSI/Src/main.c
|
|
* @author MCD Application Team
|
|
* @brief This sample code shows how to use STM32WLxx RTC HAL API to configure
|
|
* Time and Date.
|
|
******************************************************************************
|
|
* @attention
|
|
*
|
|
* Copyright (c) 2020 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.
|
|
*
|
|
******************************************************************************
|
|
*/
|
|
/* USER CODE END Header */
|
|
/* Includes ------------------------------------------------------------------*/
|
|
#include "main.h"
|
|
|
|
/* Private includes ----------------------------------------------------------*/
|
|
/* USER CODE BEGIN Includes */
|
|
|
|
/* USER CODE END Includes */
|
|
|
|
/* Private typedef -----------------------------------------------------------*/
|
|
/* USER CODE BEGIN PTD */
|
|
|
|
/* USER CODE END PTD */
|
|
|
|
/* Private define ------------------------------------------------------------*/
|
|
/* USER CODE BEGIN PD */
|
|
#define WAKEUP_TIMER_ENABLE 0x32F2
|
|
|
|
/* USER CODE END PD */
|
|
|
|
/* Private macro -------------------------------------------------------------*/
|
|
/* USER CODE BEGIN PM */
|
|
|
|
/* USER CODE END PM */
|
|
|
|
/* Private variables ---------------------------------------------------------*/
|
|
RTC_HandleTypeDef hrtc;
|
|
|
|
TIM_HandleTypeDef htim16;
|
|
|
|
/* USER CODE BEGIN PV */
|
|
/* Buffer used for displaying Time */
|
|
__IO uint32_t uwLsiFreq = 0;
|
|
__IO uint32_t RTCStatus = 0;
|
|
|
|
uint16_t tmpCCTIM_CHANNEL[2] = {0, 0};
|
|
__IO uint32_t uwCaptureNumber = 0;
|
|
__IO uint32_t uwPeriodValue = 0;
|
|
/* USER CODE END PV */
|
|
|
|
/* Private function prototypes -----------------------------------------------*/
|
|
void SystemClock_Config(void);
|
|
static void MX_GPIO_Init(void);
|
|
static void MX_RTC_Init(void);
|
|
static void MX_TIM16_Init(void);
|
|
/* USER CODE BEGIN PFP */
|
|
static uint32_t GetLSIFrequency(void);
|
|
/* USER CODE END PFP */
|
|
|
|
/* Private user code ---------------------------------------------------------*/
|
|
/* USER CODE BEGIN 0 */
|
|
|
|
/* USER CODE END 0 */
|
|
|
|
/**
|
|
* @brief The application entry point.
|
|
* @retval int
|
|
*/
|
|
int main(void)
|
|
{
|
|
/* USER CODE BEGIN 1 */
|
|
/* STM32WLxx HAL library initialization:
|
|
- Configure the Flash prefetch
|
|
- Systick timer is configured by default as source of time base, but user
|
|
can eventually implement his proper time base source (a general purpose
|
|
timer for example or other time source), keeping in mind that Time base
|
|
duration should be kept 1ms since PPP_TIMEOUT_VALUEs are defined and
|
|
handled in milliseconds basis.
|
|
- Set NVIC Group Priority to 4
|
|
- Low Level Initialization
|
|
*/
|
|
/* USER CODE END 1 */
|
|
|
|
/* MCU Configuration--------------------------------------------------------*/
|
|
|
|
/* Reset of all peripherals, Initializes the Flash interface and the Systick. */
|
|
HAL_Init();
|
|
|
|
/* USER CODE BEGIN Init */
|
|
/* Configure LED2 and LED3 */
|
|
BSP_LED_Init(LED2);
|
|
BSP_LED_Init(LED3);
|
|
|
|
/* Configure Wkup/Tamper push-button button */
|
|
BSP_PB_Init(BUTTON_SW1,BUTTON_MODE_GPIO);
|
|
/* USER CODE END Init */
|
|
|
|
/* Configure the system clock */
|
|
SystemClock_Config();
|
|
|
|
/* USER CODE BEGIN SysInit */
|
|
|
|
/* USER CODE END SysInit */
|
|
|
|
/* Initialize all configured peripherals */
|
|
MX_GPIO_Init();
|
|
MX_RTC_Init();
|
|
MX_TIM16_Init();
|
|
/* USER CODE BEGIN 2 */
|
|
/*##-2- Check if data stored in BackUp register1: Wakeup timer enable #######*/
|
|
/* Read the Back Up Register 1 Data */
|
|
if (HAL_RTCEx_BKUPRead(&hrtc, RTC_BKP_DR1) == WAKEUP_TIMER_ENABLE)
|
|
{
|
|
/* if the wakeup timer is enabled then deactivate it to disable the wakeup timer interrupt */
|
|
if (HAL_RTCEx_DeactivateWakeUpTimer(&hrtc) != HAL_OK)
|
|
{
|
|
/* Initialization Error */
|
|
Error_Handler();
|
|
}
|
|
}
|
|
|
|
/*##-3- Configure the RTC Wakeup peripheral #################################*/
|
|
/* Setting the Wakeup time to 1 s
|
|
If RTC_WAKEUPCLOCK_CK_SPRE_16BITS is selected, the frequency is 1Hz,
|
|
this allows to get a wakeup time equal to 1 s if the counter is 0x0 */
|
|
HAL_RTCEx_SetWakeUpTimer_IT(&hrtc, 0x0, RTC_WAKEUPCLOCK_CK_SPRE_16BITS,0);
|
|
|
|
|
|
/*##-4- Write 'wakeup timer enabled' tag in RTC Backup data Register 1 #######*/
|
|
HAL_RTCEx_BKUPWrite(&hrtc, RTC_BKP_DR1, WAKEUP_TIMER_ENABLE);
|
|
|
|
/* Wait Until push-button pressed */
|
|
while(BSP_PB_GetState(BUTTON_SW1) != GPIO_PIN_SET)
|
|
{
|
|
}
|
|
|
|
/* Wait Until push-button released */
|
|
while(BSP_PB_GetState(BUTTON_SW1) != GPIO_PIN_RESET)
|
|
{
|
|
}
|
|
|
|
/* Get the LSI frequency: TIM16 is used to measure the LSI frequency */
|
|
uwLsiFreq = GetLSIFrequency();
|
|
|
|
/* Update the Calendar Configuration with the LSI exact value */
|
|
hrtc.Init.HourFormat = RTC_HOURFORMAT_24;
|
|
hrtc.Init.AsynchPrediv = 0x7F;
|
|
hrtc.Init.SynchPrediv = (uwLsiFreq/128) - 1;
|
|
hrtc.Init.OutPut = RTC_OUTPUT_DISABLE;
|
|
hrtc.Init.OutPutPolarity = RTC_OUTPUT_POLARITY_HIGH;
|
|
hrtc.Init.OutPutType = RTC_OUTPUT_TYPE_OPENDRAIN;
|
|
|
|
if(HAL_RTC_Init(&hrtc) != HAL_OK)
|
|
{
|
|
/* Initialization Error */
|
|
Error_Handler();
|
|
}
|
|
/* USER CODE END 2 */
|
|
|
|
/* Infinite loop */
|
|
/* USER CODE BEGIN WHILE */
|
|
RTCStatus = 1;
|
|
while (1)
|
|
{
|
|
/* USER CODE END WHILE */
|
|
|
|
/* USER CODE BEGIN 3 */
|
|
|
|
}
|
|
/* USER CODE END 3 */
|
|
}
|
|
|
|
/**
|
|
* @brief System Clock Configuration
|
|
* @retval None
|
|
*/
|
|
void SystemClock_Config(void)
|
|
{
|
|
RCC_OscInitTypeDef RCC_OscInitStruct = {0};
|
|
RCC_ClkInitTypeDef RCC_ClkInitStruct = {0};
|
|
|
|
/** Configure the main internal regulator output voltage
|
|
*/
|
|
__HAL_PWR_VOLTAGESCALING_CONFIG(PWR_REGULATOR_VOLTAGE_SCALE1);
|
|
|
|
/** Initializes the CPU, AHB and APB buses clocks
|
|
*/
|
|
RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_LSI|RCC_OSCILLATORTYPE_MSI;
|
|
RCC_OscInitStruct.MSIState = RCC_MSI_ON;
|
|
RCC_OscInitStruct.MSICalibrationValue = RCC_MSICALIBRATION_DEFAULT;
|
|
RCC_OscInitStruct.MSIClockRange = RCC_MSIRANGE_11;
|
|
RCC_OscInitStruct.LSIDiv = RCC_LSI_DIV1;
|
|
RCC_OscInitStruct.LSIState = RCC_LSI_ON;
|
|
RCC_OscInitStruct.PLL.PLLState = RCC_PLL_NONE;
|
|
if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK)
|
|
{
|
|
Error_Handler();
|
|
}
|
|
/** Configure the SYSCLKSource, HCLK, PCLK1 and PCLK2 clocks dividers
|
|
*/
|
|
RCC_ClkInitStruct.ClockType = RCC_CLOCKTYPE_HCLK3|RCC_CLOCKTYPE_HCLK
|
|
|RCC_CLOCKTYPE_SYSCLK|RCC_CLOCKTYPE_PCLK1
|
|
|RCC_CLOCKTYPE_PCLK2;
|
|
RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_MSI;
|
|
RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1;
|
|
RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV1;
|
|
RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV1;
|
|
RCC_ClkInitStruct.AHBCLK3Divider = RCC_SYSCLK_DIV1;
|
|
|
|
if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_2) != HAL_OK)
|
|
{
|
|
Error_Handler();
|
|
}
|
|
}
|
|
|
|
/**
|
|
* @brief RTC Initialization Function
|
|
* @param None
|
|
* @retval None
|
|
*/
|
|
static void MX_RTC_Init(void)
|
|
{
|
|
|
|
/* USER CODE BEGIN RTC_Init 0 */
|
|
|
|
/* USER CODE END RTC_Init 0 */
|
|
|
|
/* USER CODE BEGIN RTC_Init 1 */
|
|
|
|
/* USER CODE END RTC_Init 1 */
|
|
/** Initialize RTC Only
|
|
*/
|
|
hrtc.Instance = RTC;
|
|
hrtc.Init.HourFormat = RTC_HOURFORMAT_24;
|
|
hrtc.Init.AsynchPrediv = RTC_ASYNCH_PREDIV;
|
|
hrtc.Init.SynchPrediv = RTC_SYNCH_PREDIV;
|
|
hrtc.Init.OutPut = RTC_OUTPUT_DISABLE;
|
|
hrtc.Init.OutPutRemap = RTC_OUTPUT_REMAP_NONE;
|
|
hrtc.Init.OutPutPolarity = RTC_OUTPUT_POLARITY_HIGH;
|
|
hrtc.Init.OutPutType = RTC_OUTPUT_TYPE_OPENDRAIN;
|
|
hrtc.Init.OutPutPullUp = RTC_OUTPUT_PULLUP_NONE;
|
|
hrtc.Init.BinMode = RTC_BINARY_NONE;
|
|
if (HAL_RTC_Init(&hrtc) != HAL_OK)
|
|
{
|
|
Error_Handler();
|
|
}
|
|
/** Enable the WakeUp
|
|
*/
|
|
if (HAL_RTCEx_SetWakeUpTimer_IT(&hrtc, 0, RTC_WAKEUPCLOCK_RTCCLK_DIV16, 0) != HAL_OK)
|
|
{
|
|
Error_Handler();
|
|
}
|
|
/* USER CODE BEGIN RTC_Init 2 */
|
|
|
|
/* USER CODE END RTC_Init 2 */
|
|
|
|
}
|
|
|
|
/**
|
|
* @brief TIM16 Initialization Function
|
|
* @param None
|
|
* @retval None
|
|
*/
|
|
static void MX_TIM16_Init(void)
|
|
{
|
|
|
|
/* USER CODE BEGIN TIM16_Init 0 */
|
|
|
|
/* USER CODE END TIM16_Init 0 */
|
|
|
|
TIM_IC_InitTypeDef sConfigIC = {0};
|
|
|
|
/* USER CODE BEGIN TIM16_Init 1 */
|
|
|
|
/* USER CODE END TIM16_Init 1 */
|
|
htim16.Instance = TIM16;
|
|
htim16.Init.Prescaler = 0;
|
|
htim16.Init.CounterMode = TIM_COUNTERMODE_UP;
|
|
htim16.Init.Period = 0xFFFF;
|
|
htim16.Init.ClockDivision = TIM_CLOCKDIVISION_DIV1;
|
|
htim16.Init.RepetitionCounter = 0;
|
|
htim16.Init.AutoReloadPreload = TIM_AUTORELOAD_PRELOAD_DISABLE;
|
|
if (HAL_TIM_Base_Init(&htim16) != HAL_OK)
|
|
{
|
|
Error_Handler();
|
|
}
|
|
if (HAL_TIM_IC_Init(&htim16) != HAL_OK)
|
|
{
|
|
Error_Handler();
|
|
}
|
|
sConfigIC.ICPolarity = TIM_INPUTCHANNELPOLARITY_RISING;
|
|
sConfigIC.ICSelection = TIM_ICSELECTION_DIRECTTI;
|
|
sConfigIC.ICPrescaler = TIM_ICPSC_DIV1;
|
|
sConfigIC.ICFilter = 0;
|
|
if (HAL_TIM_IC_ConfigChannel(&htim16, &sConfigIC, TIM_CHANNEL_1) != HAL_OK)
|
|
{
|
|
Error_Handler();
|
|
}
|
|
/* USER CODE BEGIN TIM16_Init 2 */
|
|
|
|
/* USER CODE END TIM16_Init 2 */
|
|
|
|
}
|
|
|
|
/**
|
|
* @brief GPIO Initialization Function
|
|
* @param None
|
|
* @retval None
|
|
*/
|
|
static void MX_GPIO_Init(void)
|
|
{
|
|
|
|
/* GPIO Ports Clock Enable */
|
|
__HAL_RCC_GPIOB_CLK_ENABLE();
|
|
|
|
}
|
|
|
|
/* USER CODE BEGIN 4 */
|
|
/**
|
|
* @brief Input Capture callback in non blocking mode
|
|
* @param htim : TIM IC handle
|
|
* @retval None
|
|
*/
|
|
void HAL_TIM_IC_CaptureCallback(TIM_HandleTypeDef *htim)
|
|
{
|
|
/* Get the Input Capture value */
|
|
tmpCCTIM_CHANNEL[uwCaptureNumber++] = HAL_TIM_ReadCapturedValue(&htim16, TIM_CHANNEL_1);
|
|
|
|
if (uwCaptureNumber >= 2)
|
|
{
|
|
if ( tmpCCTIM_CHANNEL[0] > tmpCCTIM_CHANNEL[1] )
|
|
{
|
|
/* Compute the period length */
|
|
uwPeriodValue = (uint16_t)(0xFFFF - tmpCCTIM_CHANNEL[0] + tmpCCTIM_CHANNEL[1] + 1);
|
|
}
|
|
else
|
|
{
|
|
/* Compute the period length */
|
|
uwPeriodValue = (uint16_t)(tmpCCTIM_CHANNEL[1] - tmpCCTIM_CHANNEL[0]);
|
|
}
|
|
/* Frequency computation */
|
|
uwLsiFreq = (uint32_t) SystemCoreClock / uwPeriodValue;
|
|
uwLsiFreq *= 8;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* @brief WakeUp timer callback
|
|
* @param hrtc : RTC handle
|
|
* @retval None
|
|
*/
|
|
void HAL_RTCEx_WakeUpTimerEventCallback(RTC_HandleTypeDef *hrtc)
|
|
{
|
|
/* Toggle LED2 */
|
|
BSP_LED_Toggle(LED2);
|
|
}
|
|
|
|
/**
|
|
* @brief Configures TIM16 to measure the LSI oscillator frequency.
|
|
* @param None
|
|
* @retval LSI Frequency
|
|
*/
|
|
static uint32_t GetLSIFrequency(void)
|
|
{
|
|
TIM_IC_InitTypeDef TIMInput_Config;
|
|
|
|
/* Configure the TIM peripheral *********************************************/
|
|
/* Set TIMx instance */
|
|
htim16.Instance = TIM16;
|
|
|
|
/* TIM16 configuration: Input Capture mode ---------------------
|
|
The LSI oscillator is connected to TIM16 TIM_CHANNEL_1.
|
|
The Rising edge is used as active edge.
|
|
The TIM16 Capture/Compare register associated to TIM_CHANNEL_1
|
|
is used to compute the frequency value.
|
|
------------------------------------------------------------ */
|
|
htim16.Init.Prescaler = 0;
|
|
htim16.Init.CounterMode = TIM_COUNTERMODE_UP;
|
|
htim16.Init.Period = 0xFFFF;
|
|
htim16.Init.ClockDivision = 0;
|
|
if(HAL_TIM_IC_Init(&htim16) != HAL_OK)
|
|
{
|
|
/* Initialization Error */
|
|
Error_Handler();
|
|
}
|
|
|
|
HAL_TIMEx_RemapConfig(&htim16, TIM_TIM16_TI1_LSI);
|
|
|
|
/* Configure the Input Capture of TIM_CHANNEL_1 */
|
|
TIMInput_Config.ICPolarity = TIM_ICPOLARITY_RISING;
|
|
TIMInput_Config.ICSelection = TIM_ICSELECTION_DIRECTTI;
|
|
TIMInput_Config.ICPrescaler = TIM_ICPSC_DIV8;
|
|
TIMInput_Config.ICFilter = 0;
|
|
if(HAL_TIM_IC_ConfigChannel(&htim16, &TIMInput_Config, TIM_CHANNEL_1) != HAL_OK)
|
|
{
|
|
/* Initialization Error */
|
|
Error_Handler();
|
|
}
|
|
|
|
/* Start the TIM Input Capture measurement in interrupt mode */
|
|
if(HAL_TIM_IC_Start_IT(&htim16, TIM_CHANNEL_1) != HAL_OK)
|
|
{
|
|
Error_Handler();
|
|
}
|
|
|
|
/* Wait until the TIM16 gets 2 LSI edges */
|
|
while(uwCaptureNumber != 2)
|
|
{
|
|
}
|
|
|
|
/* Disable TIM16 Capture/Compare channel Interrupt Request */
|
|
HAL_TIM_IC_Stop_IT(&htim16, TIM_CHANNEL_1);
|
|
|
|
/* Deinitialize the TIM16 peripheral registers to their default reset values */
|
|
HAL_TIM_IC_DeInit(&htim16);
|
|
|
|
return uwLsiFreq;
|
|
}
|
|
|
|
/* USER CODE END 4 */
|
|
|
|
/**
|
|
* @brief This function is executed in case of error occurrence.
|
|
* @retval None
|
|
*/
|
|
void Error_Handler(void)
|
|
{
|
|
/* USER CODE BEGIN Error_Handler_Debug */
|
|
/* User can add his own implementation to report the HAL error return state */
|
|
RTCStatus = 0xE;
|
|
while (1)
|
|
{
|
|
/* LED3 is On: This indicates that the system generates an error. */
|
|
BSP_LED_On(LED3);
|
|
}
|
|
/* USER CODE END Error_Handler_Debug */
|
|
}
|
|
|
|
#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 CODE BEGIN 6 */
|
|
/* 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) */
|
|
/* USER CODE END 6 */
|
|
}
|
|
#endif /* USE_FULL_ASSERT */
|