//RTC设置成内部或者外部时钟
void RTC_Config(rtc_clk rtcclk)
{
RTC_InitTypeDef RTC_InitStructure;
RCC_APB1PeriphClockCmd(RCC_APB1Periph_PWR, ENABLE);
PWR_BackupAccessCmd(ENABLE);
if(rtcclk == extrnal)
{
/* 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);
/* Enable the RTC Clock */
RCC_RTCCLKCmd(ENABLE);
/* Wait for RTC APB registers synchronisation */
RTC_WaitForSynchro();
}
if(rtcclk == inner)
{
RCC_LSICmd(ENABLE); //开启内部低速
while(RCC_GetFlagStatus(RCC_FLAG_LSIRDY) == RESET);
RCC_RTCCLKConfig(RCC_RTCCLKSource_LSI);
RCC_RTCCLKCmd(ENABLE);
RTC_WaitForSynchro();
}
RTC_InitStructure.RTC_AsynchPrediv = 0x7F;
RTC_InitStructure.RTC_SynchPrediv = 0xFF;
RTC_InitStructure.RTC_HourFormat = RTC_HourFormat_24;
RTC_Init(&RTC_InitStructure);
}
/**
* @brief This function handles External line 10 to 15 interrupts request.
* @param None
* @retval None
*/
void EXTI15_10_IRQHandler(void)
{
if((EXTI_GetITStatus(KEY_BUTTON_EXTI_LINE) != RESET))
{
/* Set the LCD Back Color */
LCD_SetBackColor(White);
/* Enable the RTC Clock */
RCC_RTCCLKCmd(ENABLE);
/* Wait for RTC APB registers synchronisation */
RTC_WaitForSynchro();
/* Enable the alarmA */
RTC_AlarmCmd(RTC_Alarm_A, ENABLE);
/* Clear the LEFT EXTI pending bit */
EXTI_ClearITPendingBit(KEY_BUTTON_EXTI_LINE);
}
else if((EXTI_GetITStatus(TAMPER_BUTTON_EXTI_LINE) != RESET))
{
/* Disable the RTC Clock */
RCC_RTCCLKCmd(DISABLE);
/* Wait for RTC APB registers synchronisation */
RTC_WaitForSynchro();
/* Clear the TAMPER EXTI pending bit */
EXTI_ClearITPendingBit(TAMPER_BUTTON_EXTI_LINE);
}
}
// 通过直接计算校准RTC时钟(使用0.01ms周期的systick测量再修正RTC预分频系数)。
void RTC_Calibrate(void)
{
unsigned int systick_sta;
unsigned int rtctick_lmt;
unsigned int prescaler = 0;
// 在使用systick测量RTC tick的周期长度之前，初始化systick
NVIC_SetPriority(SysTick_IRQn, 0);
SysTick_Init();
// 开始rtcalarm计数并使能rtcalarm中断
SysTick_Enable();
// 先设置默认的RTC预分频系数(rtc tike = ~1ms)
RTC_SetPrescaler(DEF_RTC_PRESCALER);
/* Enable RTC Clock */
RCC_RTCCLKCmd(ENABLE);
/* Wait for RTC registers synchronization */
RTC_WaitForSynchro();
/* Wait until last write operation on RTC registers has finished */
RTC_WaitForLastTask();
// 测量RTC单周期长度持续~1秒
rtctick_lmt = systick+1000/SYSTICK_PERIOD;
// 记录测量前的systick值
systick_sta = systick;
// 测量1000个周期的rtc tick(~1s)
while(systick < rtctick_lmt);
prescaler = (DEF_RTC_PRESCALER * 1000)/((systick-systick_sta)/100);
// printf("prescaler = %d.\r\n", prescaler);
// 重新设置RTC预分频系数
RTC_SetPrescaler(prescaler);
/* Enable RTC Clock */
RCC_RTCCLKCmd(ENABLE);
/* Wait for RTC registers synchronization */
RTC_WaitForSynchro();
/* Wait until last write operation on RTC registers has finished */
RTC_WaitForLastTask();
// 校准完RTC时钟后，停止rtcalarm计数并禁止rtcalarm中断
SysTick_Disable();
// printf("RTC Clock calibrated.\r\n");
}
void rtc_init() {
RCC_APB1PeriphClockCmd(RCC_APB1Periph_PWR | RCC_APB1Periph_BKP, ENABLE);
if(BKP->DR1 != BKP_MAGIC) {
PWR_BackupAccessCmd(ENABLE); /* Allow write access to BKP Domain */
RCC_BackupResetCmd(ENABLE); /* Reset Backup Domain */
RCC_BackupResetCmd(DISABLE);
RCC_LSEConfig(RCC_LSE_ON); /* Enable LSE */
while(RCC_GetFlagStatus(RCC_FLAG_LSERDY) == RESET); /* Wait till LSE is ready */
RCC_RTCCLKConfig(RCC_RTCCLKSource_LSE); /* Select LSE as RTC Clock Source */
RCC_RTCCLKCmd(ENABLE); /* Enable RTC Clock */
RTC_WaitForSynchro(); /* Wait for RTC registers synchronization */
RTC_WaitForLastTask();
RTC_SetPrescaler(32767); /* RTC period = RTCCLK/RTC_PR = (32.768 KHz)/(32767+1) */
RTC_WaitForLastTask();
BKP->DR1 = BKP_MAGIC;
PWR_BackupAccessCmd(DISABLE); /* Protect backup registers */
rtc_is_valid = 0;
} else {
/* Wait for RTC registers synchronization */
RTC_WaitForSynchro();
}
}
unsigned int RTC_cfg(void)
{
unsigned int ret;
RTC_DateTypeDef RTC_DateStruct;
RTC_TimeTypeDef RTC_TimeStruct;
ret = 0;
if (RTC_ReadBackupRegister(RTC_BKP_DR1) != 0xA5A5)
{
ret = 1;
/* Allow access to BKP Domain */
PWR_BackupAccessCmd(ENABLE);
/* Reset Backup Domain */
RTC_DeInit();
/* Enable LSE */
RCC_LSEConfig(RCC_LSE_ON);
/* Wait till LSE is ready */
while (RCC_GetFlagStatus(RCC_FLAG_LSERDY) == RESET)
{}
/* Select LSE as RTC Clock Source */
RCC_RTCCLKConfig(RCC_RTCCLKSource_LSE);
/* Enable RTC Clock */
RCC_RTCCLKCmd(ENABLE);
/* Wait for RTC registers synchronization */
RTC_WaitForSynchro();
/* Adjust time */
RTC_DateStruct.RTC_Year = 13;
RTC_DateStruct.RTC_Month = 05;
RTC_DateStruct.RTC_Date = 29;
RTC_DateStruct.RTC_WeekDay = 3;
RTC_TimeStruct.RTC_Hours = 11;
RTC_TimeStruct.RTC_Minutes = 0;
RTC_TimeStruct.RTC_Seconds = 0;
RTC_SetTime(RTC_Format_BIN, &RTC_TimeStruct);
RTC_SetDate(RTC_Format_BIN, &RTC_DateStruct);
RTC_WriteBackupRegister(RTC_BKP_DR1, 0xA5A5);
}
else
{
/* Allow access to BKP Domain */
PWR_BackupAccessCmd(ENABLE);
/* Wait for RTC registers synchronization */
RTC_WaitForSynchro();
while (RTC_GetFlagStatus(RTC_FLAG_RSF) == RESET);
}
return ret;
}
/**
* @brief Configures RTC clock source and prescaler.
* @param None
* @retval None
*/
void RTC_Configuration(void)
{
/* RTC clock source configuration ----------------------------------------*/
/* Allow access to BKP Domain */
PWR_BackupAccessCmd(ENABLE);
/* Reset Backup Domain */
BKP_DeInit();
/* Enable LSE OSC */
RCC_LSICmd(ENABLE);
/* Wait till LSE is ready */
while(RCC_GetFlagStatus(RCC_FLAG_LSIRDY) == RESET)
{
}
/* Select the RTC Clock Source */
RCC_RTCCLKConfig(RCC_RTCCLKSource_LSI);
/* Enable the RTC Clock */
RCC_RTCCLKCmd(ENABLE);
/* RTC configuration -----------------------------------------------------*/
/* Wait for RTC APB registers synchronisation */
RTC_WaitForSynchro();
/* Set the RTC time base to 1s */
RTC_SetPrescaler(32767);
/* Wait until last write operation on RTC registers has finished */
RTC_WaitForLastTask();
RTC_ITConfig(RTC_IT_ALR, ENABLE);
RTC_WaitForLastTask();
}
void RTC_Configuration(void)
{
/* Enable PWR and BKP clocks */
RCC_APB1PeriphClockCmd(RCC_APB1Periph_PWR | RCC_APB1Periph_BKP, ENABLE);
/* Allow access to BKP Domain */
PWR_BackupAccessCmd(ENABLE);
/* Reset Backup Domain */
BKP_DeInit();
// Select HSE/128 as RTC Clock Source
RCC_RTCCLKConfig(RCC_RTCCLKSource_HSE_Div128);
/* Enable RTC Clock */
RCC_RTCCLKCmd(ENABLE);
/* Wait for RTC registers synchronization */
RTC_WaitForSynchro();
/* Wait until last write operation on RTC registers has finished */
RTC_WaitForLastTask();
/* Enable the RTC Second */
// RTC_ITConfig(RTC_IT_SEC, ENABLE);
/* Wait until last write operation on RTC registers has finished */
RTC_WaitForLastTask();
/* Set RTC prescaler: set RTC period to 1sec 1ms */
RTC_SetPrescaler(62); /*62499 RTC period = RTCCLK/RTC_PR = 8M / 128 = 62.5kHz ) -> (62499+1) */
/* Wait until last write operation on RTC registers has finished */
RTC_WaitForLastTask();
}
void rtc_init(void) {
RCC_APB1PeriphClockCmd(RCC_APB1Periph_PWR, ENABLE); // Enable PWR clock
PWR_RTCAccessCmd(ENABLE); // Enable access to RTC
// Note: the LSI is used as RTC source clock
// The RTC Clock may vary due to LSI frequency dispersion.
RCC_LSICmd(ENABLE); // Enable LSI
while (RCC_GetFlagStatus(RCC_FLAG_LSIRDY) == RESET) {} // Wait until ready
RCC_RTCCLKConfig(RCC_RTCCLKSource_LSI); // Select LSI as RTC Clock Source
RCC_RTCCLKCmd(ENABLE); // Enable RTC Clock
RTC_WaitForSynchro(); // Wait for RTC registers synchronization
uint32_t lsi_freq = 40000; // [TODO] To be measured precisely using a timer input capture
RTC_InitTypeDef RTC_InitStructure;
RTC_InitStructure.RTC_AsynchPrediv = 127;
RTC_InitStructure.RTC_SynchPrediv = (lsi_freq / 128) - 1;
RTC_InitStructure.RTC_HourFormat = RTC_HourFormat_24;
RTC_Init(&RTC_InitStructure);
PWR_RTCAccessCmd(DISABLE); // Disable access to RTC
rtc_inited = 1;
}
/**
* @file RTC_Configuration
* @brief Configures the RTC.
* @param 无
* @retval 无
*/
static void RTC_Configuration(void)
{
//启用PWR和BKP的时钟（from APB1）
RCC_APB1PeriphClockCmd(RCC_APB1Periph_PWR | RCC_APB1Periph_BKP, ENABLE);
//后备域解锁
PWR_BackupAccessCmd(ENABLE);
//备份寄存器模块复位
BKP_DeInit();
//外部32.768K时钟使能
RCC_LSEConfig(RCC_LSE_ON);
//等待稳定
while (RCC_GetFlagStatus(RCC_FLAG_LSERDY) == RESET)
{}
//RTC时钟源配置成LSE（外部32.768K）
RCC_RTCCLKConfig(RCC_RTCCLKSource_LSE);
//RTC开启
RCC_RTCCLKCmd(ENABLE);
//开启后需要等待APB1时钟与RTC时钟同步，才能读写寄存器
RTC_WaitForSynchro();
//读写寄存器前，要确定上一个操作已经结束
RTC_WaitForLastTask();
//使能秒中断
RTC_ITConfig(RTC_IT_SEC, ENABLE);
//等待寄存器写入完成
RTC_WaitForLastTask();
//设置RTC分频器，使RTC时钟为1Hz
//RTC period = RTCCLK/RTC_PR = (32.768 KHz)/(32767+1)
RTC_SetPrescaler(32767);
//等待写入完成
RTC_WaitForLastTask();
}
void rtc_init(){
RCC_APB1PeriphClockCmd(RCC_APB1Periph_PWR, ENABLE);
PWR_BackupAccessCmd(ENABLE); //needed?
/* use LSE-clock X3=32768 KHz, C
RCC_LSEConfig(RCC_LSE_ON);
while(RCC_GetFlagStatus(RCC_FLAG_LSERDY) == RESET){};
RCC_RTCCLKConfig(RCC_RTCCLKSource_LSE);
RCC_RTCCLKCmd(ENABLE);
RTC_WaitForSynchro();
RTC_InitTypeDef rtc_init;
rtc_init.RTC_AsynchPrediv = 0xFF;
rtc_init.RTC_SynchPrediv = 0x7F;
rtc_init.RTC_HourFormat = RTC_HourFormat_24; */
RCC_RTCCLKConfig(RCC_RTCCLKSource_HSE_Div32);
RCC_RTCCLKCmd(ENABLE);
RTC_WaitForSynchro();
RTC_InitTypeDef rtc_init;
rtc_init.RTC_SynchPrediv = 0x7a0;
rtc_init.RTC_AsynchPrediv = 0x7F;
rtc_init.RTC_HourFormat = RTC_HourFormat_24;
RTC_Init(&rtc_init);
}
void TM_RTC_Config(TM_RTC_ClockSource_t source) {
if (source == TM_RTC_ClockSource_Internal) {
/* 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);
} else if (source == TM_RTC_ClockSource_External) {
/* 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);
}
/* Enable the RTC Clock */
RCC_RTCCLKCmd(ENABLE);
/* Wait for register synchronization */
RTC_WaitForSynchro();
/* Write status */
RTC_WriteBackupRegister(RTC_STATUS_REG, RTC_STATUS_INIT_OK);
}
void RTC_Configuration(void)
{
/* Reset Backup Domain */
BKP_DeInit();
/* Enable LSE */
RCC_LSEConfig(RCC_LSE_ON);
/* Wait till LSE is ready */
while (RCC_GetFlagStatus(RCC_FLAG_LSERDY) == RESET)
{}
/* Select LSE as RTC Clock Source */
RCC_RTCCLKConfig(RCC_RTCCLKSource_LSE);
/* Enable RTC Clock */
RCC_RTCCLKCmd(ENABLE);
/* Wait for RTC registers synchronization */
RTC_WaitForSynchro();
/* Wait until last write operation on RTC registers has finished */
RTC_WaitForLastTask();
/* Set RTC prescaler: set RTC period to 1sec */
RTC_SetPrescaler(32767); /* RTC period = RTCCLK/RTC_PR = (32.768 KHz)/(32767+1) */
/* Wait until last write operation on RTC registers has finished */
RTC_WaitForLastTask();
}
/****************************************************************************
* 名 称：void RTC_Configuration(void)
* 功 能：RTC配置函数
* 入口参数：无
* 出口参数：无
* 说 明：
* 调用方法：
****************************************************************************/
static void RTC_Configuration(void)
{
/* Enable the PWR clock */
RCC_APB1PeriphClockCmd(RCC_APB1Periph_PWR, ENABLE);
/* Allow access to RTC */
PWR_RTCAccessCmd(ENABLE);
/*!< Reset RTC Domain */
RCC_RTCResetCmd(ENABLE);
RCC_RTCResetCmd(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 *///外部32.378K晶振
/* 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 RTC Clock */
RCC_RTCCLKCmd(ENABLE);
/* Wait for RTC APB registers synchronisation */
RTC_WaitForSynchro();
}
/*******************************************************************************
* Function Name : RTC_Configuration
* Description : Configures the RTC.
* Input : None
* Output : None
* Return : 0 reday,-1 error.
*******************************************************************************/
int RTC_Config(void)
{
u32 count=0x250000;
/* Enable the PWR clock */
RCC_APB1PeriphClockCmd(RCC_APB1Periph_PWR, ENABLE);
/* Allow access to RTC */
PWR_BackupAccessCmd(ENABLE);
RCC_LSEConfig(RCC_LSE_ON);
/* Wait till LSE is ready */
while(RCC_GetFlagStatus(RCC_FLAG_LSERDY) == RESET && (--count) );
if ( count == 0 )
{
return -1;
}
/* Select the RTC Clock Source */
RCC_RTCCLKConfig(RCC_RTCCLKSource_LSE);
SynchPrediv = 0xFF;
AsynchPrediv = 0x7F;
/* Enable the RTC Clock */
RCC_RTCCLKCmd(ENABLE);
/* Wait for RTC APB registers synchronisation */
RTC_WaitForSynchro();
return 0;
}
void RTC_SetUp(void)
{
/* Allow access to RTC */
PWR_BackupAccessCmd(ENABLE);
RCC_LSICmd(ENABLE); // LSI is used as RTC clock source
while (RCC_GetFlagStatus(RCC_FLAG_LSIRDY) == RESET)
; // Wait till LSI is ready
RCC_RTCCLKConfig(RCC_RTCCLKSource_LSI); // Select RTC clock source
// Enable RTC clock
RCC_RTCCLKCmd(ENABLE);
RTC_WaitForSynchro(); // Wait until the RTC Time and Date registers (RTC_TR and RTC_DR) are synchronized with RTC APB clock.
// Set RTC calendar clock to 1 HZ (1 second)
RTC_InitStructure.RTC_HourFormat = RTC_HourFormat_24;
RTC_InitStructure.RTC_AsynchPrediv = 88;
RTC_InitStructure.RTC_SynchPrediv = 470;
if (RTC_Init(&RTC_InitStructure) == ERROR)
{
while (1)
;
}
}
void RTC_Configuration(void)
{
/* Enable PWR and BKP clocks */
RCC_APB1PeriphClockCmd(RCC_APB1Periph_PWR | RCC_APB1Periph_BKP, ENABLE);
/* Allow access to BKP Domain */
PWR_BackupAccessCmd(ENABLE);
/* Reset Backup Domain */
BKP_DeInit();
#ifdef RTCClockSource_LSI
/* Enable LSI */
RCC_LSICmd(ENABLE);
/* Wait till LSI is ready */
while(RCC_GetFlagStatus(RCC_FLAG_LSIRDY) == RESET)
{
}
/* Select LSI as RTC Clock Source */
RCC_RTCCLKConfig(RCC_RTCCLKSource_LSI);
#elif defined RTCClockSource_LSE
/* Enable LSE */
RCC_LSEConfig(RCC_LSE_ON);
/* Wait till LSE is ready */
while (RCC_GetFlagStatus(RCC_FLAG_LSERDY) == RESET)
{}
/* Select LSE as RTC Clock Source */
RCC_RTCCLKConfig(RCC_RTCCLKSource_LSE);
#endif
/* Enable RTC Clock */
RCC_RTCCLKCmd(ENABLE);
/* Wait for RTC registers synchronization */
RTC_WaitForSynchro();
/* Wait until last write operation on RTC registers has finished */
RTC_WaitForLastTask();
/* Enable the RTC Second */
RTC_ITConfig(RTC_IT_SEC, ENABLE);
/* Wait until last write operation on RTC registers has finished */
RTC_WaitForLastTask();
/* Set RTC prescaler: set RTC period to 1sec */
/* Set RTC prescaler: set RTC period to 1sec */
#ifdef RTCClockSource_LSI
RTC_SetPrescaler(31999); /* RTC period = RTCCLK/RTC_PR = (32.000 KHz)/(31999+1) */
#elif defined RTCClockSource_LSE
RTC_SetPrescaler(32767); /* RTC period = RTCCLK/RTC_PR = (32.768 KHz)/(32767+1) */
#endif
// RTC_SetPrescaler(32767); /* RTC period = RTCCLK/RTC_PR = (32.768 KHz)/(32767+1) */
/* Wait until last write operation on RTC registers has finished */
RTC_WaitForLastTask();
}
// 配置RTC硬件。
void RTC_Configure(void)
{
/* Enable PWR and BKP clocks */
RCC_APB1PeriphClockCmd(RCC_APB1Periph_PWR | RCC_APB1Periph_BKP, ENABLE);
/* Allow access to BKP Domain */
PWR_BackupAccessCmd(ENABLE);
RCC_RTCCLKCmd(ENABLE);
/* Reset Backup Domain */
BKP_DeInit();
/* Wait until last write operation on RTC registers has finished */
RTC_WaitForLastTask();
#ifdef RTCClockSource_LSI
/* Enable LSI */
RCC_LSICmd(ENABLE);
/* Wait till LSI is ready */
while(RCC_GetFlagStatus(RCC_FLAG_LSIRDY) == RESET);
/* Select LSI as RTC Clock Source */
RCC_RTCCLKConfig(RCC_RTCCLKSource_LSI);
#elif defined RTCClockSource_LSE
/* Enable LSE */
RCC_LSEConfig(RCC_LSE_ON);
/* Wait till LSE is ready */
while(RCC_GetFlagStatus(RCC_FLAG_LSERDY) == RESET);
/* Select LSE as RTC Clock Source */
RCC_RTCCLKConfig(RCC_RTCCLKSource_LSE);
#endif
// 上电后需要校准RTC时钟，也即准确计算出RTC的周期时长。
RTC_Calibrate();
#ifdef RTCClockOutput_Enable
/* Disable the Tamper Pin */
BKP_TamperPinCmd(DISABLE); /* To output RTCCLK/64 on Tamper pin, the tamper functionality must be disabled */
/* Enable RTC Clock Output on Tamper Pin */
BKP_RTCCalibrationClockOutputCmd(ENABLE);
#endif
/*允许RTC报警中断*/
RTC_ITConfig(RTC_IT_ALR, ENABLE);
/* Wait until last write operation on RTC registers has finished */
RTC_WaitForLastTask();
}
static void sys_clk_init(void)
{
ErrorStatus HSEStartUpStatus;
// set clocks registers back to defaults (for debugging, st_demo)
RCC_DeInit();
// enable the high speed external osc (HSE) and spin for it to stabilise
RCC_HSEConfig(RCC_HSE_ON);
HSEStartUpStatus = RCC_WaitForHSEStartUp();
if (HSEStartUpStatus != SUCCESS)
{
///@todo handle error better
while (1)
{}
}
// Enable Prefetch Buffer
FLASH_PrefetchBufferCmd(ENABLE);
// Flash 1 wait state
FLASH_SetLatency(FLASH_Latency_5);
// Setup the PLLCLK source and pre scaler for the following clocks
// PLLCLK = 8MHz * 336[N] / (8[M] * 2[P]) = 168MHz
// PLLCLK = 8MHz * 336[N] / (8[M] * 7[Q]) = 48MHz
/* Setup the PLLCLK source and pre scaler */
RCC_PLLConfig(RCC_PLLSource_HSE, 8, 336, 2, 7);
// AHB prescaler set to div 1, HCLK = SYSCLK (168MHz [max])
RCC_HCLKConfig(RCC_SYSCLK_Div1);
// APB2 (high speed) prescaler set to div 2, APB2 = HCLK / 2 = 84MHz [max]
RCC_PCLK2Config(RCC_HCLK_Div2);
// APB1 (low speed) prescaler set to div 4, APB1 = HCLK / 4 = 42MHz [max]
RCC_PCLK1Config(RCC_HCLK_Div4);
// Enable the PLL and spin for it to be ready
RCC_PLLCmd(ENABLE);
while(RCC_GetFlagStatus(RCC_FLAG_PLLRDY) == RESET)
{}
// Switch the system clock over to the PLL output and spin until it is ready
RCC_SYSCLKConfig(RCC_SYSCLKSource_PLLCLK);
while(RCC_GetSYSCLKSource() != 0x08) ;
// enable backup register domain clocks incase they are not enabled
RCC_APB1PeriphClockCmd(RCC_APB1Periph_PWR, ENABLE);
PWR_BackupAccessCmd(ENABLE);
RCC_RTCCLKConfig(RCC_RTCCLKSource_HSE_Div31);
RCC_RTCCLKCmd(ENABLE);
#ifdef DEBUG_MCO
/* this is a handy debugging option to output the sys_clk/4 to the MCO1 pin
* it must be sys_clk/4 as gpio can only output 50MHz max, so 168MHz/4 = 42MHz */
RCC_MCO1Config(RCC_MCO1Source_PLLCLK, RCC_MCO1Div_4);
#endif
}
uint8_t RTC_AutoTest(void)
{
uint8_t i = 0;
/* Enable PWR and BKP clocks */
RCC_APB1PeriphClockCmd(RCC_APB1Periph_PWR | RCC_APB1Periph_BKP, ENABLE);
/* Allow access to BKP Domain */
PWR_BackupAccessCmd(ENABLE);
/* Reset Backup Domain */
BKP_DeInit();
/* Enable LSE */
RCC_LSEConfig(RCC_LSE_ON);
/* Wait till LSE is ready */
while (RCC_GetFlagStatus(RCC_FLAG_LSERDY) == RESET)
{
Delay_us(50000);
i++;
if(i>100) //5秒都还没起振，坏了
{
return 0;
}
}
/* Select LSE as RTC Clock Source */
RCC_RTCCLKConfig(RCC_RTCCLKSource_LSE);
/* Enable RTC Clock */
RCC_RTCCLKCmd(ENABLE);
/* Wait for RTC registers synchronization
* 因为RTC时钟是低速的，内环时钟是高速的，所以要同步
*/
RTC_WaitForSynchro();
/* Wait until last write operation on RTC registers has finished */
RTC_WaitForLastTask();
/* Enable the RTC Second */
RTC_ITConfig(RTC_IT_SEC, ENABLE);
/* Wait until last write operation on RTC registers has finished */
RTC_WaitForLastTask();
/* Set RTC prescaler: set RTC period to 1sec */
RTC_SetPrescaler(32767); /* RTC period = RTCCLK/RTC_PR = (32.768 KHz)/(32767+1) = 1HZ */
/* Wait until last write operation on RTC registers has finished */
RTC_WaitForLastTask();
return 1;
}
void rtc_timer_start(u32 alarmValue)
{
//enable BKP and PWR, Clock
RCC_APB1PeriphClockCmd(RCC_APB1Periph_BKP|RCC_APB1Periph_PWR , ENABLE);
// RTC clock source configuration
PWR_BackupAccessCmd(ENABLE); //Allow access to BKP Domain
RCC_LSEConfig(RCC_LSE_ON); //Enable LSE OSC
while(RCC_GetFlagStatus(RCC_FLAG_LSERDY)==RESET); //Wait till LSE is ready
RCC_RTCCLKConfig(RCC_RTCCLKSource_LSE); //Select the RTC Clock Source
RCC_RTCCLKCmd(ENABLE); //enable RTC
// RTC configuration
// Wait for RTC APB registers synchronisation
RTC_WaitForSynchro();
RTC_SetPrescaler(0); //Set the RTC time base to 30.5us
RTC_WaitForLastTask(); //Wait until last write operation on RTC registers has finished
//Set the RTC time counter to 0
RTC_SetCounter(0);
RTC_WaitForLastTask();
// Set the RTC time alarm(the length of slot)
RTC_SetAlarm(alarmValue);
RTC_WaitForLastTask();
//interrupt when reach alarm value
RTC_ClearFlag(RTC_IT_ALR);
RTC_ITConfig(RTC_IT_ALR, ENABLE);
//Configures EXTI line 17 to generate an interrupt on rising edge(alarm interrupt to wakeup board)
EXTI_ClearITPendingBit(EXTI_Line17);
EXTI_InitTypeDef EXTI_InitStructure;
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);
//Configure RTC global interrupt:
//Configure NVIC: Preemption Priority = 1 and Sub Priority = 1
NVIC_InitTypeDef NVIC_InitStructure;
NVIC_InitStructure.NVIC_IRQChannel = RTC_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 1;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);
//Configure RTC Alarm interrupt:
//Configure NVIC: Preemption Priority = 0 and Sub Priority = 1
NVIC_InitStructure.NVIC_IRQChannel = RTCAlarm_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 1;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);
}
OSStatus platform_rtc_init(void)
{
#ifdef MICO_ENABLE_MCU_RTC
RTC_InitTypeDef RTC_InitStruct;
RTC_DeInit( );
RTC_InitStruct.RTC_HourFormat = RTC_HourFormat_24;
/* RTC ticks every second */
RTC_InitStruct.RTC_AsynchPrediv = 0x7F;
RTC_InitStruct.RTC_SynchPrediv = 0xFF;
RTC_Init( &RTC_InitStruct );
#ifdef USE_RTC_BKP
/* Enable the PWR clock */
RCC_APB1PeriphClockCmd(RCC_APB1Periph_PWR, ENABLE);
/* Allow access to BKP Domain */
PWR_BackupAccessCmd(ENABLE);
PWR_BackupRegulatorCmd(ENABLE);
#endif
/* 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);
/* Enable the RTC Clock */
RCC_RTCCLKCmd(ENABLE);
/* RTC configuration -------------------------------------------------------*/
/* Wait for RTC APB registers synchronisation */
RTC_WaitForSynchro();
#ifdef USE_RTC_BKP
if (RTC_ReadBackupRegister(RTC_BKP_DR0) != USE_RTC_BKP) {
/* set it to 12:20:30 08/04/2013 monday */
platform_rtc_set_time(&default_rtc_time);
RTC_WriteBackupRegister(RTC_BKP_DR0, USE_RTC_BKP);
}
#else
//#ifdef RTC_ENABLED
/* application must have mico_application_default_time structure declared somewhere, otherwise it wont compile */
/* write default application time inside rtc */
platform_rtc_set_time(&mico_default_time);
//#endif /* RTC_ENABLED */
#endif
return kNoErr;
#else
return kUnsupportedErr;
#endif
}
void rtc_write(void) {
if(!rtc_ok) {
// Enable the PWR clock
RCC_APB1PeriphClockCmd(RCC_APB1Periph_PWR, ENABLE);
// Allow access to RTC
PWR_BackupAccessCmd(ENABLE);
// 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);
// Enable the RTC Clock
RCC_RTCCLKCmd(ENABLE);
// Wait for RTC APB registers synchronisation
RTC_WaitForSynchro();
// Enable The TimeStamp
RTC_TimeStampCmd(RTC_TimeStampEdge_Falling, ENABLE); // TODO: can return ERROR
RTC_InitTypeDef RTC_InitStructure;
RTC_InitStructure.RTC_AsynchPrediv = 0x7F;
RTC_InitStructure.RTC_SynchPrediv = 0xFF;
RTC_InitStructure.RTC_HourFormat = RTC_HourFormat_24;
RTC_Init(&RTC_InitStructure);
}
RTC_TimeTypeDef TimeRTC;
RTC_DateTypeDef DateRTC;
TimeRTC.RTC_H12 = RTC_H12_AM; // Always AM for 24H
TimeRTC.RTC_Hours = rtc_hour;
TimeRTC.RTC_Minutes = rtc_minute;
TimeRTC.RTC_Seconds = rtc_second;
RTC_SetTime(RTC_Format_BIN, &TimeRTC);
(void)RTC->DR;
DateRTC.RTC_WeekDay = rtc_day;
DateRTC.RTC_Date = rtc_date;
DateRTC.RTC_Month = rtc_month;
DateRTC.RTC_Year = rtc_year;
RTC_SetDate(RTC_Format_BIN, &DateRTC); // TODO: can return ERROR
RTC_WriteBackupRegister(RTC_BKP_DR0, 0xCA7E);
rtc_ok = true;
}
void SetRtcTime(void)
{
/* Enable PWR and BKP clocks */
RCC_APB1PeriphClockCmd(RCC_APB1Periph_PWR | RCC_APB1Periph_BKP, ENABLE);
/* Allow access to BKP Domain */
PWR_BackupAccessCmd(ENABLE);
/* Reset Backup Domain */
BKP_DeInit();
#ifdef RTC_LSE
/* Enable LSE */
RCC_LSEConfig(RCC_LSE_ON);
/* Wait till LSE is ready */
while (RCC_GetFlagStatus(RCC_FLAG_LSERDY) == RESET)
{}
/* Select LSE as RTC Clock Source */
RCC_RTCCLKConfig(RCC_RTCCLKSource_LSE);
#else
/* 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);
#endif
/* Enable RTC Clock */
RCC_RTCCLKCmd(ENABLE);
/* Wait for RTC registers synchronization */
RTC_WaitForSynchro();
/* Wait until last write operation on RTC registers has finished */
RTC_WaitForLastTask();
/* Enable the RTC Second */
RTC_ITConfig(RTC_IT_SEC, ENABLE);
/* Wait until last write operation on RTC registers has finished */
RTC_WaitForLastTask();
printf("\r\n RTC configured....");
/* Adjust time by values entred by the user on the hyperterminal */
// Time_Adjust();
Time_SetCalendarTime(time_set);
BKP_WriteBackupRegister(BKP_DR1, 0xA5A5);
/* Wait until last write operation on RTC registers has finished */
RTC_WaitForLastTask();
}
void initClock(void)
{
RCC_APB1PeriphClockCmd(RCC_APB1Periph_PWR,ENABLE);
RCC_APB2PeriphClockCmd(RCC_APB2Periph_ADC1 | RCC_APB2Periph_SYSCFG , ENABLE);
// divide HCLK / 2
RCC_HCLKConfig(RCC_SYSCLK_Div2);
// enable HSI
RCC_HSICmd(ENABLE);
RCC_PLLCmd(DISABLE);
// wait for HSI to get ready
while (RCC_GetFlagStatus(RCC_FLAG_HSIRDY) == RESET);
// configure PLL - x4 /2
RCC_PLLConfig( RCC_PLLSource_HSI, RCC_PLLMul_8, RCC_PLLDiv_4 );
RCC_PLLCmd(ENABLE);
while ( RCC_GetFlagStatus( RCC_FLAG_PLLRDY ) == RESET );
RCC_SYSCLKConfig(RCC_SYSCLKSource_PLLCLK);
RCC_ClocksTypeDef RCC_Clocks;
RCC_GetClocksFreq(&RCC_Clocks);
SysTick_Config((RCC_Clocks.SYSCLK_Frequency / 2) / 1000); // Cannot exceed 16,777,215
/* Set SysTick Preemption Priority, it's a system handler rather than a regular interrupt */
NVIC_SetPriority(SysTick_IRQn, 0x04);
// setup lse for rtc
PWR_RTCAccessCmd(ENABLE);
// Reset RTC Backup Domain
RCC_RTCResetCmd(ENABLE);
RCC_RTCResetCmd(DISABLE);
// LSE Enable
RCC_LSEConfig(RCC_LSE_ON);
// Wait until LSE is ready
while (RCC_GetFlagStatus(RCC_FLAG_LSERDY) == RESET);
// RTC Clock Source Selection
RCC_RTCCLKConfig(RCC_RTCCLKSource_LSE);
// Enable the RTC
RCC_RTCCLKCmd(ENABLE);
RTC_WaitForSynchro();
}
void back_register_init(void)
{
RCC_APB1PeriphClockCmd(RCC_APB1Periph_PWR, ENABLE);
PWR_BackupAccessCmd(ENABLE);
RCC_RTCCLKConfig(RCC_RTCCLKSource_HSE_Div31);
RCC_RTCCLKCmd(ENABLE);
// RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_BKPSRAM, ENABLE);//打开BACKUP_SRAM的时钟.
// backup_data[0]++;
// rt_kprintf("backup_data[0] = %d\n",backup_data[0]);
}
static void rtcConfig(void)
{
/* Enable PWR and BKP clocks */
RCC_APB1PeriphClockCmd(RCC_APB1Periph_PWR | RCC_APB1Periph_BKP, ENABLE);
/* Allow access to BKP Domain */
PWR_BackupAccessCmd(ENABLE);
/* Reset Backup Domain */
BKP_DeInit();
/* 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);
/* Enable RTC Clock */
RCC_RTCCLKCmd(ENABLE);
/* Wait for RTC registers synchronization */
RTC_WaitForSynchro();
/* Wait until last write operation on RTC registers has finished */
RTC_WaitForLastTask();
/* Enable the RTC Second */
RTC_ITConfig(RTC_IT_SEC, ENABLE);
/* Wait until last write operation on RTC registers has finished */
RTC_WaitForLastTask();
#ifndef PRECISION_IN_MS
/* Set RTC prescaler: set RTC period to 1 sec */
RTC_SetPrescaler(40000); //LSI default is 40k HZ
#else
/* Set RTC prescaler: set RTC period to 1ms */
RTC_SetPrescaler(40); //LSI default is 40k HZ
#endif
/* Wait until last write operation on RTC registers has finished */
RTC_WaitForLastTask();
/* To output second signal on Tamper pin, the tamper functionality
* must be disabled (by default this functionality is disabled)
*/
//BKP_TamperPinCmd(DISABLE);
/* Enable the RTC Second Output on Tamper Pin */
//BKP_RTCOutputConfig(BKP_RTCOutputSource_Second);
}
// Control functions
void rtcInit(void) {
RCC_APB1PeriphClockCmd(RCC_APB1Periph_PWR, ENABLE);
PWR_BackupAccessCmd(ENABLE);
RCC_BackupResetCmd(ENABLE);
RCC_BackupResetCmd(DISABLE);
RCC_LSICmd(ENABLE);
RCC_RTCCLKConfig(RCC_RTCCLKSource_LSI);
RCC_RTCCLKCmd(ENABLE);
}
/*
************************************************************
* 函数名称： RTC_Init
*
* 函数功能： RTC初始化
*
* 入口参数： 无
*
* 返回参数： 无
*
* 说明：
************************************************************
*/
_Bool RTC_Init(void)
{
#if(USE_EXT_RCC == 1)
unsigned char errCount = 0;
#endif
RCC_APB1PeriphClockCmd(RCC_APB1Periph_PWR | RCC_APB1Periph_BKP, ENABLE); //使能PWR和BKP外设时钟
PWR_BackupAccessCmd(ENABLE); //使能后备寄存器访问
BKP_DeInit(); //复位备份区域
#if(USE_EXT_RCC == 1)
RCC_LSEConfig(RCC_LSE_ON); //设置外部低速晶振(LSE),使用外设低速晶振
while(RCC_GetFlagStatus(RCC_FLAG_LSERDY) == RESET && errCount < 250) //检查指定的RCC标志位设置与否,等待低速晶振就绪
{
errCount++;
DelayMs(10);
}
if(errCount >= 250)
return 1; //初始化时钟失败,晶振有问题
#endif
#if(USE_EXT_RCC == 1)
RCC_RTCCLKConfig(RCC_RTCCLKSource_LSE); //设置RTC时钟(RTCCLK),选择LSE作为RTC时钟
#else
RCC_RTCCLKConfig(RCC_RTCCLKSource_HSE_Div128); //设置RTC时钟(HSE/128),选择HES作为RTC时钟
#endif
RCC_RTCCLKCmd(ENABLE); //使能RTC时钟
RTC_WaitForLastTask(); //等待最近一次对RTC寄存器的写操作完成
RTC_WaitForSynchro(); //等待RTC寄存器同步
RTC_ITConfig(RTC_IT_ALR, ENABLE); //使能RTC闹钟中断
RTC_WaitForLastTask(); //等待最近一次对RTC寄存器的写操作完成
RTC_EnterConfigMode(); //允许配置
#if(USE_EXT_RCC == 1)
RTC_SetPrescaler(32767); //设置RTC预分频的值
#else
RTC_SetPrescaler(HSE_VALUE / 128 - 1); //设置RTC预分频的值
#endif
RTC_WaitForLastTask(); //等待最近一次对RTC寄存器的写操作完成
RTC_SetCounter(0); //设置RTC计数器的值
RTC_WaitForLastTask(); //等待最近一次对RTC寄存器的写操作完成
RTC_ExitConfigMode(); //退出配置模式
RTC_NVIC_Init();
return 0;
}
/**
* @brief Configure the RTC peripheral by selecting the clock source.
* @param None
* @retval None
*/
void RTC_Config(void)
{
/* Enable the PWR clock */
RCC_APB1PeriphClockCmd(RCC_APB1Periph_PWR, ENABLE);
/* Allow access to RTC */
PWR_BackupAccessCmd(ENABLE);
#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);
SynchPrediv = 0x18F;
AsynchPrediv = 0x63;
#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);
SynchPrediv = 0xFF;
AsynchPrediv = 0x7F;
#else
#error Please select the RTC Clock source inside the main.c file
#endif /* RTC_CLOCK_SOURCE_LSI */
/* Enable the RTC Clock */
RCC_RTCCLKCmd(ENABLE);
/* Wait for RTC APB registers synchronisation */
RTC_WaitForSynchro();
/* Enable The TimeStamp */
RTC_TimeStampCmd(RTC_TimeStampEdge_Falling, ENABLE);
}
/**
* @brief Configures the RTC Wakeup.
* @param None
* @retval None
*/
void RTC_Config(void)
{
NVIC_InitTypeDef NVIC_InitStructure;
EXTI_InitTypeDef EXTI_InitStructure;
RCC_APB1PeriphClockCmd(RCC_APB1Periph_PWR, ENABLE);
/*!< Allow access to RTC */
PWR_RTCAccessCmd(ENABLE);
/*!< Reset RTC Domain */
RCC_RTCResetCmd(ENABLE);
RCC_RTCResetCmd(DISABLE);
/*!< LSE Enable */
RCC_LSEConfig(RCC_LSE_ON);
/*!< Wait till LSE is ready */
while (RCC_GetFlagStatus(RCC_FLAG_LSERDY) == RESET)
{}
/*!< LCD Clock Source Selection */
RCC_RTCCLKConfig(RCC_RTCCLKSource_LSE);
/*!< Enable the RTC Clock */
RCC_RTCCLKCmd(ENABLE);
/*!< Wait for RTC APB registers synchronisation */
RTC_WaitForSynchro();
/* EXTI configuration *******************************************************/
EXTI_ClearITPendingBit(EXTI_Line20);
EXTI_InitStructure.EXTI_Line = EXTI_Line20;
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 = 0;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);
/* RTC Wakeup Interrupt Generation: Clock Source: RTCDiv_16, Wakeup Time Base: 4s */
RTC_WakeUpClockConfig(RTC_WakeUpClock_RTCCLK_Div16);
RTC_SetWakeUpCounter(0x1FFF);
/* Enable the Wakeup Interrupt */
RTC_ITConfig(RTC_IT_WUT, ENABLE);
}
