/**
* @brief This function handles RTC Tamper and Time Stamp interrupts requests.
* @param None
* @retval None
*/
void TAMP_STAMP_IRQHandler(void)
{
if(RTC_GetFlagStatus(RTC_FLAG_TAMP1F) != RESET)
{
/* Tamper 1 detection event occurred */
/* Check if RTC Backup Data registers are cleared */
if(IsBackupRegReset() == 0)
{
/* OK, RTC Backup Data registers are reset as expected */
/* Toggle LED2 */
STM_EVAL_LEDToggle(LED2);
}
else
{
/* RTC Backup Data registers are not reset */
/* Toggle LED4 */
STM_EVAL_LEDToggle(LED4);
}
/* Clear Tamper 1 pin Event pending flag */
RTC_ClearFlag(RTC_FLAG_TAMP1F);
/* Disable Tamper pin 1 */
RTC_TamperCmd(RTC_Tamper_1, DISABLE);
/* Enable Tamper pin */
RTC_TamperCmd(RTC_Tamper_1, ENABLE);
}
}
/**
* @brief RTC Tamper Configuration.
* @param None
* @retval None
*/
void Tamper_Init(void)
{
RTC_TamperFilterConfig((RTC_TamperFilter_TypeDef)RTC_TampFilter[TampFilterIndex]);
RTC_TamperSamplingFreqConfig(RTC_TamperSamplingFreq_RTCCLK_Div32768);
RTC_TamperPinsPrechargeDuration(RTC_TamperPrechargeDuration_None);
RTC_TamperLevelConfig(RTC_Tamper_1, RTC_TamperLevel_Low );
RTC_TamperCmd(RTC_Tamper_1, ENABLE);
RTC_ITConfig(RTC_IT_TAMP, ENABLE);
}
/**
* @brief This function handles Tamper interrupt request.
* @param None
* @retval None
*/
void TAMPER_STAMP_IRQHandler(void) {
if (RTC_GetFlagStatus(RTC_FLAG_TAMP1F) != RESET) {
/* Tamper 1 detection event occurred */
/* Check if RTC Backup Data registers are cleared */
if (IsBackupRegReset() == 0) {
/* OK, RTC Backup Data registers are reset as expected */
/* Turn on GREEN and BLUE */
GPIO_SetBits(GPIOB, LD_GREEN_GPIO_PIN | LD_BLUE_GPIO_PIN);
} else {
/* RTC Backup Data registers are not reset */
/* Turn off GREEN and BLUE */
GPIO_ResetBits(GPIOB, LD_GREEN_GPIO_PIN | LD_BLUE_GPIO_PIN);
}
/* Clear Tamper 1 pin Event(TAMP1F) pending flag */
RTC_ClearFlag(RTC_FLAG_TAMP1F);
/* Disable Tamper pin 1 */
RTC_TamperCmd(RTC_Tamper_1, DISABLE);
/* Enable Tamper pin */
RTC_TamperCmd(RTC_Tamper_1, ENABLE);
}
}
/**
* @brief RTC Tamper Configuration.
* @param None
* @retval None
*/
void Tamper_Init(void)
{
/* Tamper detection after time < 2 sample and time > 1 sample*/
RTC_TamperFilterConfig(RTC_TamperFilter_2Sample);
/* configure 1 Sample = RTCCLK/32768 = 1s */
RTC_TamperSamplingFreqConfig(RTC_TamperSamplingFreq_RTCCLK_Div32768);
/* Tamper sensitivity is to Low level */
RTC_TamperLevelConfig(RTC_Tamper_1, RTC_TamperLevel_Low );
/* Enable Tamper 1*/
RTC_TamperCmd(RTC_Tamper_1, ENABLE);
/* Enable Tamper Interrupt */
RTC_ITConfig(RTC_IT_TAMP, ENABLE);
}
/**
* @brief RTC Tamper Configuration.
* @param None
* @retval None
*/
void RTC_TamperConfig(void)
{
EXTI_InitTypeDef EXTI_InitStructure;
NVIC_InitTypeDef NVIC_InitStructure;
/* EXTI configuration */
EXTI_ClearITPendingBit(EXTI_Line21);
EXTI_InitStructure.EXTI_Line = EXTI_Line21;
EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt;
EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Rising;
EXTI_InitStructure.EXTI_LineCmd = ENABLE;
EXTI_Init(&EXTI_InitStructure);
/* Enable RTC_TAMP_STAMP_IRQn */
NVIC_InitStructure.NVIC_IRQChannel = TAMP_STAMP_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);
/* determines the number of active pulse for the specific level */
RTC_TamperFilterConfig(RTC_TamperFilter_2Sample);
/* Determines the frequency at which each of the tamper inputs are sampled */
RTC_TamperSamplingFreqConfig(RTC_TamperSamplingFreq_RTCCLK_Div16384);
/* Select the tamper 1 with High level */
RTC_TamperTriggerConfig(RTC_Tamper_1, RTC_TamperTrigger_LowLevel );
/* Enabale the tamper 1 */
RTC_TamperCmd(RTC_Tamper_1 , ENABLE);
/* Enable Tamper interrupt */
RTC_ITConfig(RTC_IT_TAMP, ENABLE);
/* Clear tamper 1 falg */
RTC_ClearFlag(RTC_FLAG_TAMP1F);
}
/**
* @brief Configure the RTC peripheral by selecting the clock source.
* @param None
* @retval None
*/
void RTC_Config(void)
{
NVIC_InitTypeDef NVIC_InitStructure;
EXTI_InitTypeDef EXTI_InitStructure;
/* Enable the PWR clock */
RCC_APB1PeriphClockCmd(RCC_APB1Periph_PWR, ENABLE);
/* Allow access to RTC */
PWR_BackupAccessCmd(ENABLE);
/* Reset BKP Domain */
RCC_BackupResetCmd(ENABLE);
RCC_BackupResetCmd(DISABLE);
#if defined (RTC_CLOCK_SOURCE_LSI) /* LSI used as RTC source clock*/
/* The RTC Clock may varies due to LSI frequency dispersion. */
/* Enable the LSI OSC */
RCC_LSICmd(ENABLE);
/* Wait till LSI is ready */
while(RCC_GetFlagStatus(RCC_FLAG_LSIRDY) == RESET)
{
}
/* Select the RTC Clock Source */
RCC_RTCCLKConfig(RCC_RTCCLKSource_LSI);
#elif defined (RTC_CLOCK_SOURCE_LSE) /* LSE used as RTC source clock */
/* Enable the LSE OSC */
RCC_LSEConfig(RCC_LSE_ON);
/* Wait till LSE is ready */
while(RCC_GetFlagStatus(RCC_FLAG_LSERDY) == RESET)
{
}
/* Select the RTC Clock Source */
RCC_RTCCLKConfig(RCC_RTCCLKSource_LSE);
#else
#error Please select the RTC Clock source inside the main.c file
#endif /* RTC_CLOCK_SOURCE_LSI */
/* Enable The external line21 interrupt */
EXTI_ClearITPendingBit(EXTI_Line21);
EXTI_InitStructure.EXTI_Line = EXTI_Line21;
EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt;
EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Rising;
EXTI_InitStructure.EXTI_LineCmd = ENABLE;
EXTI_Init(&EXTI_InitStructure);
/* Enable TAMPER IRQChannel */
NVIC_InitStructure.NVIC_IRQChannel = TAMP_STAMP_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);
/* Disable the Tamper 1 detection */
RTC_TamperCmd(RTC_Tamper_1, DISABLE);
/* Clear Tamper 1 pin Event(TAMP1F) pending flag */
RTC_ClearFlag(RTC_FLAG_TAMP1F);
/* Configure the Tamper 1 Trigger */
RTC_TamperTriggerConfig(RTC_Tamper_1, RTC_TamperTrigger_FallingEdge);
/* Enable the Tamper interrupt */
RTC_ITConfig(RTC_IT_TAMP, ENABLE);
/* Clear Tamper 1 pin interrupt pending bit */
RTC_ClearITPendingBit(RTC_IT_TAMP1);
/* Enable the Tamper 1 detection */
RTC_TamperCmd(RTC_Tamper_1, 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_stm32f0xx.s) before to branch to application main.
To reconfigure the default setting of SystemInit() function, refer to
system_stm32f0xx.c file
*/
RTC_TimeTypeDef RTC_TimeStruct;
RTC_TimeTypeDef RTC_TimeStructureInit;
RTC_TimeTypeDef RTC_StampTimeStruct;
/* Configure the external interrupt "RIGHT" and "LEFT" buttons */
STM_EVAL_PBInit(BUTTON_RIGHT,BUTTON_MODE_EXTI);
STM_EVAL_PBInit(BUTTON_LEFT,BUTTON_MODE_EXTI);
/* Configure the RTC peripheral by selecting the clock source.*/
RTC_Config();
/* LCD Display init */
Display_Init();
/* Configure the RTC tamper register : To Clear all the Backup data register */
RTC_TamperConfig();
/* Initialize time Stucture */
RTC_TimeStructInit(&RTC_TimeStruct);
/* Infinite loop */
while (1)
{
/* Set the LCD Back Color and text size */
LCD_SetFont(&Font16x24);
LCD_SetBackColor(White);
/* Check on the event 'start' */
if(StartEvent != 0x0)
{
/* Get the RTC sub second fraction */
SecondFraction = (((256 - (uint32_t)RTC_GetSubSecond()) * 1000) / 256);
/* Get the Curent time */
RTC_GetTime(RTC_Format_BIN, &RTC_TimeStruct);
/* Refresh : Display the curent time and the sub second on the LCD */
RTC_Time_Display(37, Black , RTC_Get_Time(SecondFraction , &RTC_TimeStruct));
}
else
{
/* Re-initialize the Display time on the LCD */
RTC_Time_InitDisplay();
}
/* Left button is pressed */
if (Button_State == LEFT_ON)
{
/* Enable Tamper interrupt */
RTC_ITConfig(RTC_IT_TAMP, ENABLE);
/* Enabale the tamper 1 */
RTC_TamperCmd(RTC_Tamper_1 , ENABLE);
/* Set the LCD Back Color */
LCD_SetBackColor(White);
/* Clear the LCD line 5 */
LCD_ClearLine(Line5);
/* Get the current time */
RTC_GetTime(RTC_Format_BIN, &RTC_TimeStructureInit);
CurrentTimeSec = (RTC_TimeStructureInit.RTC_Hours * 3600) + (RTC_TimeStructureInit.RTC_Minutes * 60) +
RTC_TimeStructureInit.RTC_Seconds;
/* start count */
StartEvent = 0x1;
/* Reinitialize Button_State variable */
Button_State = 0;
}
/* Right button is pressed */
else if (Button_State == RIGHT_ON)
{
uint16_t Colorx;
if (BackupIndex < 5)
{
if((uint8_t)(BackupIndex% 2) != 0x0)
{
/* Set LCD backcolor*/
LCD_SetBackColor(Blue2);
Colorx = White;
}
else
{
/* Set LCD backcolor*/
LCD_SetBackColor(Cyan);
Colorx = Black;
}
SubSecFrac = 0;
/* Get the Current sub second and time */
SubSecFrac = (((256 - (uint32_t)RTC_GetSubSecond()) * 1000) / 256);
RTC_GetTime(RTC_Format_BIN, &RTC_StampTimeStruct);
LCD_SetFont(&Font16x24);
/* Display result on the LCD */
RTC_Time_Display( LINE(3 + BackupIndex), Colorx, RTC_Get_Time(SubSecFrac , &RTC_StampTimeStruct) );
if (BackupIndex < 2)
{
/* Save time register to Backup register ( the first 5 register is reserved for time) */
RTC_WriteBackupRegister(BKPDataReg[BackupIndex],(uint32_t)RTC->TR);
/* Save sub second time stamp register ( the latest 6 register is reserved for time) */
RTC_WriteBackupRegister(BKPDataReg[BackupIndex + 2], SubSecFrac);
}
}
else
{
/* the backup register is full with 10trials */
/* Set the LCD Back Color */
LCD_SetBackColor(White);
LCD_SetFont(&Font12x12);
/* Set the LCD Text Color */
LCD_SetTextColor(Red);
LCD_DisplayStringLine(LINE(16), (uint8_t *)MESSAGE4);
LCD_DisplayStringLine(LINE(17), (uint8_t *)MESSAGE5);
}
BackupIndex++;
/* Set the LCD Back Color */
LCD_SetBackColor(White);
/* Reinitialize Button_State variable */
Button_State = 0;
}
/* TAMPER button is pressed */
else if (Button_RTC == RTC_TAMP)
{
/* Set the LCD Back Color */
LCD_SetBackColor(White);
LCD_SetFont(&Font16x24);
/* Clear LCD line 5 to 9 */
for (i=0; i < 5; i++)
{
/* Clear all the LCD lignes from 3 to 7 */
LCD_ClearLine(LINE(3+i));
}
/* reset Counter */
BackupIndex = 0 ;
/* Enetr to idle */
StartEvent =0x0;
LCD_SetFont(&Font12x12);
RTC_Time_InitDisplay();
LCD_SetFont(&Font12x12);
LCD_ClearLine(LINE(16));
LCD_ClearLine(LINE(17));
/* Enable Tamper interrupt */
RTC_ITConfig(RTC_IT_TAMP, DISABLE);
/* Enabale the tamper 1 */
RTC_TamperCmd(RTC_Tamper_1 , DISABLE);
/* Reinitialize Button_RTC variable */
Button_RTC = 0;
}
}
}
