/**
* @brief This function handles External line 0 interrupt request.
* @param None
* @retval None
*/
void EXTI0_IRQHandler(void)
{
if(EXTI_GetITStatus(WAKEUP_BUTTON_EXTI_LINE) != RESET)
{
/* Display the current alarm */
RTC_AlarmShow();
/* Clear the Wakeup Button EXTI line pending bit */
EXTI_ClearITPendingBit(WAKEUP_BUTTON_EXTI_LINE);
}
}
/**
* @brief This function handles External line 9 to 5 interrupt request.
* @param None
* @retval None
*/
void EXTI9_5_IRQHandler(void)
{
if(EXTI_GetITStatus(KEY_BUTTON_EXTI_LINE) != RESET)
{
/* Display the current time on the Hyperterminal */
RTC_TimeShow();
/* Clear the Key Button EXTI line pending bit */
EXTI_ClearITPendingBit(KEY_BUTTON_EXTI_LINE);
}
if(EXTI_GetITStatus(UP_BUTTON_EXTI_LINE) != RESET)
{
/* Display the current alarm on the Hyperterminal */
RTC_AlarmShow();
/* Clear the UP Button EXTI line pending bit */
EXTI_ClearITPendingBit(UP_BUTTON_EXTI_LINE);
}
}
void RTC_Configuration(void) {
EXTI_InitTypeDef EXTI_InitStructure;
NVIC_InitTypeDef NVIC_InitStructure;
/* If this is first time turn on the board */
if (RTC_ReadBackupRegister(RTC_BKP_DR0) != 0x32F2) {
/* RTC configuration */
RTC_Config();
/* Display the RTC Time and Alarm */
RTC_TimeShow();
RTC_AlarmShow();
} else { // If this is not the first time turn on the board
/* Check if the Power On Reset flag is set */
if (RCC_GetFlagStatus(RCC_FLAG_PORRST) != RESET) {
/* Power On Reset occurred */
printf("\r\n * Power On Reset occurred");
/* Check if the Pin Reset flag is set */
} else if (RCC_GetFlagStatus(RCC_FLAG_PINRST) != RESET) {
/* External Reset occurred */
printf("\r\n * External Reset occurred");
}
/* Enable the PWR clock */
RCC_APB1PeriphClockCmd(RCC_APB1Periph_PWR, ENABLE);
/* Allow access to RTC */
PWR_BackupAccessCmd(ENABLE);
/* Wait for RTC APB registers synchronisation */
RTC_WaitForSynchro();
/* Clear the RTC Alarm Flag */
RTC_ClearFlag(RTC_FLAG_ALRAF);
/* Clear the EXTI Line 17 Pending bit (Connected internally to RTC Alarm) */
EXTI_ClearITPendingBit(EXTI_Line17);
/* Display the RTC Time and Alarm */
RTC_TimeShow();
RTC_AlarmShow();
}
/* RTC Alarm A Interrupt Configuration */
/* EXTI configuration *********************************************************/
EXTI_ClearITPendingBit(EXTI_Line17);
EXTI_InitStructure.EXTI_Line = EXTI_Line17;
EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt;
EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Rising;
EXTI_InitStructure.EXTI_LineCmd = ENABLE;
EXTI_Init(&EXTI_InitStructure);
EXTI_ClearITPendingBit(EXTI_Line22);
EXTI_InitStructure.EXTI_Line = EXTI_Line22;
EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt;
EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Rising;
EXTI_InitStructure.EXTI_LineCmd = ENABLE;
EXTI_Init(&EXTI_InitStructure);
/* Enable the RTC Wakeup Interrupt */
NVIC_InitStructure.NVIC_IRQChannel = RTC_WKUP_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 1;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);
/* Enable the RTC Alarm Interrupt */
NVIC_InitStructure.NVIC_IRQChannel = RTC_Alarm_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 2;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);
}
/**
* @brief Main program.
* @param None
* @retval None
*/
void RTC_Calendar_Example(void)
{
/*!< At this stage the microcontroller clock setting is already configured,
this is done through SystemInit() function which is called from startup
file (startup_stm32f30x.s) before to branch to application main.
To reconfigure the default setting of SystemInit() function, refer to
system_stm32f30x.c file
*/
NVIC_InitTypeDef NVIC_InitStructure;
EXTI_InitTypeDef EXTI_InitStructure;
/* USARTx configured as follow:
- BaudRate = 115200 baud
- Word Length = 8 Bits
- One Stop Bit
- No parity
- Hardware flow control disabled (RTS and CTS signals)
- Receive and transmit enabled
*/
USART_InitStructure.USART_BaudRate = 115200;
USART_InitStructure.USART_WordLength = USART_WordLength_8b;
USART_InitStructure.USART_StopBits = USART_StopBits_1;
USART_InitStructure.USART_Parity = USART_Parity_No;
USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;
USART_InitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx;
STM_EVAL_COMInit(COM1, &USART_InitStructure);
/* Output a message on Hyperterminal using printf function */
printf("\n\r *********************** RTC Hardware Calendar Example ***********************\n\r");
#if defined (RTC_CLOCK_SOURCE_LSI)
RCC_LSICmd(ENABLE);
#endif
if (RTC_ReadBackupRegister(RTC_BKP_DR0) != 0x32F2)
{
/* RTC configuration */
RTC_Config();
/* Configure the RTC data register and RTC prescaler */
RTC_InitStructure.RTC_AsynchPrediv = AsynchPrediv;
RTC_InitStructure.RTC_SynchPrediv = SynchPrediv;
RTC_InitStructure.RTC_HourFormat = RTC_HourFormat_24;
/* Check on RTC init */
if (RTC_Init(&RTC_InitStructure) == ERROR)
{
printf("\n\r /!\\***** RTC Prescaler Config failed ********/!\\ \n\r");
}
/* Configure the time register */
RTC_TimeRegulate();
}
else
{
/* Check if the Power On Reset flag is set */
if (RCC_GetFlagStatus(RCC_FLAG_PORRST) != RESET)
{
printf("\r\n Power On Reset occurred....\n\r");
}
/* Check if the Pin Reset flag is set */
else if (RCC_GetFlagStatus(RCC_FLAG_PINRST) != RESET)
{
printf("\r\n External Reset occurred....\n\r");
}
printf("\n\r No need to configure RTC....\n\r");
/* Enable the PWR clock */
RCC_APB1PeriphClockCmd(RCC_APB1Periph_PWR, ENABLE);
/* Allow access to RTC */
PWR_BackupAccessCmd(ENABLE);
/* Wait for RTC APB registers synchronisation */
RTC_WaitForSynchro();
/* Clear the RTC Alarm Flag */
RTC_ClearFlag(RTC_FLAG_ALRAF);
/* Clear the EXTI Line 17 Pending bit (Connected internally to RTC Alarm) */
EXTI_ClearITPendingBit(EXTI_Line17);
/* Display the RTC Time and Alarm */
RTC_TimeShow();
RTC_AlarmShow();
}
/* Configure the external interrupt "KEY", "SEL" and "UP" buttons */
STM_EVAL_PBInit(BUTTON_KEY, BUTTON_MODE_EXTI);
STM_EVAL_PBInit(BUTTON_SEL, BUTTON_MODE_EXTI);
STM_EVAL_PBInit(BUTTON_UP, BUTTON_MODE_EXTI);
/* Configure LEDs */
STM_EVAL_LEDInit(LED1);
STM_EVAL_LEDInit(LED2);
/* Turn LED2 ON */
STM_EVAL_LEDOn(LED2);
/* RTC Alarm A Interrupt Configuration */
/* EXTI configuration *******************************************************/
EXTI_ClearITPendingBit(EXTI_Line17);
EXTI_InitStructure.EXTI_Line = EXTI_Line17;
EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt;
EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Rising;
EXTI_InitStructure.EXTI_LineCmd = ENABLE;
EXTI_Init(&EXTI_InitStructure);
/* Enable the RTC Alarm Interrupt */
NVIC_InitStructure.NVIC_IRQChannel = RTC_Alarm_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);
/* Infinite loop */
while (1)
{
}
}
/**
* @brief Returns the time entered by user, using Hyperterminal.
* @param None
* @retval None
*/
void RTC_TimeRegulate(void)
{
uint32_t tmp_hh = 0xFF, tmp_mm = 0xFF, tmp_ss = 0xFF;
printf("\n\r==============Time Settings=====================================\n\r");
RTC_TimeStructure.RTC_H12 = RTC_H12_AM;
printf(" Please Set Hours:\n\r");
while (tmp_hh == 0xFF)
{
tmp_hh = USART_Scanf(23);
RTC_TimeStructure.RTC_Hours = tmp_hh;
}
printf(" %u\n\r", tmp_hh);
printf(" Please Set Minutes:\n\r");
while (tmp_mm == 0xFF)
{
tmp_mm = USART_Scanf(59);
RTC_TimeStructure.RTC_Minutes = tmp_mm;
}
printf(" %0.2d\n\r", tmp_mm);
printf(" Please Set Seconds:\n\r");
while (tmp_ss == 0xFF)
{
tmp_ss = USART_Scanf(59);
RTC_TimeStructure.RTC_Seconds = tmp_ss;
}
printf(" %0.2d\n\r", tmp_ss);
/* Configure the RTC time register */
if(RTC_SetTime(RTC_Format_BIN, &RTC_TimeStructure) == ERROR)
{
printf("\n\r>> !! RTC Set Time failed. !! <<\n\r");
}
else
{
printf("\n\r>> !! RTC Set Time success. !! <<\n\r");
RTC_TimeShow();
/* Indicator for the RTC configuration */
RTC_WriteBackupRegister(RTC_BKP_DR0, 0x32F2);
}
tmp_hh = 0xFF;
tmp_mm = 0xFF;
tmp_ss = 0xFF;
/* Disable the Alarm A */
RTC_AlarmCmd(RTC_Alarm_A, DISABLE);
printf("\n\r==============Alarm A Settings=====================================\n\r");
RTC_AlarmStructure.RTC_AlarmTime.RTC_H12 = RTC_H12_AM;
printf(" Please Set Alarm Hours:\n\r");
while (tmp_hh == 0xFF)
{
tmp_hh = USART_Scanf(23);
RTC_AlarmStructure.RTC_AlarmTime.RTC_Hours = tmp_hh;
}
printf(" %0.2d\n\r", tmp_hh);
printf(" Please Set Alarm Minutes:\n\r");
while (tmp_mm == 0xFF)
{
tmp_mm = USART_Scanf(59);
RTC_AlarmStructure.RTC_AlarmTime.RTC_Minutes = tmp_mm;
}
printf(" %0.2d\n\r", tmp_mm);
printf(" Please Set Alarm Seconds:\n\r");
while (tmp_ss == 0xFF)
{
tmp_ss = USART_Scanf(59);
RTC_AlarmStructure.RTC_AlarmTime.RTC_Seconds = tmp_ss;
}
printf(" %0.2d", tmp_ss);
/* Set the Alarm A */
RTC_AlarmStructure.RTC_AlarmDateWeekDay = RTC_Weekday_Monday;
RTC_AlarmStructure.RTC_AlarmDateWeekDaySel = RTC_AlarmDateWeekDaySel_Date;
RTC_AlarmStructure.RTC_AlarmMask = RTC_AlarmMask_DateWeekDay;
/* Configure the RTC Alarm A register */
RTC_SetAlarm(RTC_Format_BIN, RTC_Alarm_A, &RTC_AlarmStructure);
printf("\n\r>> !! RTC Set Alarm success. !! <<\n\r");
RTC_AlarmShow();
/* Enable the RTC Alarm A Interrupt */
RTC_ITConfig(RTC_IT_ALRA, ENABLE);
/* Enable the alarm A */
RTC_AlarmCmd(RTC_Alarm_A, ENABLE);
}
/**
* @brief Main program
* @param None
* @retval None
*/
int main(void)
{
/*!< At this stage the microcontroller clock setting is already configured,
this is done through SystemInit() function which is called from startup
file (startup_stm32f4xx.s) before to branch to application main.
To reconfigure the default setting of SystemInit() function, refer to
system_stm32f4xx.c file
*/
NVIC_InitTypeDef NVIC_InitStructure;
EXTI_InitTypeDef EXTI_InitStructure;
LEDGpio_Init();
EXTILine0_Config();
EXTILine6_Config();
uart_init();
/* Output a message on Hyperterminal using printf function */
printf("\n\r *********************** RTC Hardware Calendar Example ***********************\n\r");
if (RTC_ReadBackupRegister(RTC_BKP_DR0) != 0x32F2)
{
/* RTC configuration */
RTC_Config();
/* Configure the RTC data register and RTC prescaler */
RTC_InitStructure.RTC_AsynchPrediv = AsynchPrediv;
RTC_InitStructure.RTC_SynchPrediv = SynchPrediv;
RTC_InitStructure.RTC_HourFormat = RTC_HourFormat_24;
/* Check on RTC init */
if (RTC_Init(&RTC_InitStructure) == ERROR)
{
printf("\n\r /!\\***** RTC Prescaler Config failed ********/!\\ \n\r");
}
/* Configure the time register */
RTC_TimeRegulate();
}
else
{
/* Check if the Power On Reset flag is set */
if (RCC_GetFlagStatus(RCC_FLAG_PORRST) != RESET)
{
printf("\r\n Power On Reset occurred....\n\r");
}
/* Check if the Pin Reset flag is set */
else if (RCC_GetFlagStatus(RCC_FLAG_PINRST) != RESET)
{
printf("\r\n External Reset occurred....\n\r");
}
printf("\n\r No need to configure RTC....\n\r");
/* Enable the PWR clock */
RCC_APB1PeriphClockCmd(RCC_APB1Periph_PWR, ENABLE);
/* Allow access to RTC */
PWR_BackupAccessCmd(ENABLE);
/* Wait for RTC APB registers synchronisation */
RTC_WaitForSynchro();
/* Clear the RTC Alarm Flag */
RTC_ClearFlag(RTC_FLAG_ALRAF);
/* Clear the EXTI Line 17 Pending bit (Connected internally to RTC Alarm) */
EXTI_ClearITPendingBit(EXTI_Line17);
/* Display the RTC Time and Alarm */
RTC_TimeShow();
RTC_AlarmShow();
}
// /* Configure the external interrupt "WAKEUP", "KEY" and "TAMPER" buttons */
// STM_EVAL_PBInit(BUTTON_KEY, BUTTON_MODE_EXTI);
// STM_EVAL_PBInit(BUTTON_TAMPER , BUTTON_MODE_EXTI);
// STM_EVAL_PBInit(BUTTON_WAKEUP , BUTTON_MODE_EXTI);
//
// /* Configure LEDx */
// STM_EVAL_LEDInit(LED1);
// STM_EVAL_LEDInit(LED2);
//
// /* Turn LED1 ON */
// STM_EVAL_LEDOn(LED2);
/* RTC Alarm A Interrupt Configuration */
/* EXTI configuration *********************************************************/
EXTI_ClearITPendingBit(EXTI_Line17);
EXTI_InitStructure.EXTI_Line = EXTI_Line17;
EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt;
EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Rising;
EXTI_InitStructure.EXTI_LineCmd = ENABLE;
EXTI_Init(&EXTI_InitStructure);
/* Enable the RTC Alarm Interrupt */
NVIC_InitStructure.NVIC_IRQChannel = RTC_Alarm_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);
while (1)
{
}
}
