242 lines
7 KiB
C
242 lines
7 KiB
C
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#include <stdio.h>
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#include "stm32f4xx_hal.h"
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#include "stm32f4xx_hal_rtc.h"
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#include "misc.h"
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#include "mpconfig.h"
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#include "qstr.h"
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#include "obj.h"
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#include "systick.h"
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#include "rtc.h"
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static RTC_HandleTypeDef RtcHandle;
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static machine_uint_t rtc_info;
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#define RTC_INFO_USE_EXISTING (0)
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#define RTC_INFO_USE_LSE (1)
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#define RTC_INFO_USE_LSI (3)
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// Note: LSI is around (32KHz), these dividers should work either way
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// ck_spre(1Hz) = RTCCLK(LSE) /(uwAsynchPrediv + 1)*(uwSynchPrediv + 1)
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#define RTC_ASYNCH_PREDIV (0x7f)
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#define RTC_SYNCH_PREDIV (0x00ff)
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#if 0
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void rtc_init(void) {
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// Enable the PWR clock
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RCC_APB1PeriphClockCmd(RCC_APB1Periph_PWR, ENABLE);
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// Allow access to RTC
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PWR_BackupAccessCmd(ENABLE);
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if (RTC_ReadBackupRegister(RTC_BKP_DR0) == 0x32F2) {
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// RTC still alive, so don't re-init it
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// wait for RTC APB register synchronisation
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RTC_WaitForSynchro();
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rtc_info = RTC_INFO_USE_EXISTING;
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return;
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}
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uint32_t timeout = 10000000;
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// Enable the PWR clock
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RCC_APB1PeriphClockCmd(RCC_APB1Periph_PWR, ENABLE);
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// Allow access to RTC
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PWR_BackupAccessCmd(ENABLE);
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// Enable the LSE OSC
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RCC_LSEConfig(RCC_LSE_ON);
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// Wait till LSE is ready
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machine_uint_t sys_tick = sys_tick_counter;
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while((RCC_GetFlagStatus(RCC_FLAG_LSERDY) == RESET) && (--timeout > 0)) {
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}
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// record how long it took for the RTC to start up
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rtc_info = (sys_tick_counter - sys_tick) << 2;
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// If LSE timed out, use LSI instead
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if (timeout == 0) {
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// Disable the LSE OSC
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RCC_LSEConfig(RCC_LSE_OFF);
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// Enable the LSI OSC
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RCC_LSICmd(ENABLE);
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// Wait till LSI is ready
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while(RCC_GetFlagStatus(RCC_FLAG_LSIRDY) == RESET) {
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}
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// Use LSI as the RTC Clock Source
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RCC_RTCCLKConfig(RCC_RTCCLKSource_LSI);
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// record that we are using the LSI
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rtc_info |= RTC_INFO_USE_LSI;
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} else {
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// Use LSE as the RTC Clock Source
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RCC_RTCCLKConfig(RCC_RTCCLKSource_LSE);
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// record that we are using the LSE
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rtc_info |= RTC_INFO_USE_LSE;
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}
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// Note: LSI is around (32KHz), these dividers should work either way
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// ck_spre(1Hz) = RTCCLK(LSE) /(uwAsynchPrediv + 1)*(uwSynchPrediv + 1)
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uint32_t uwSynchPrediv = 0xFF;
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uint32_t uwAsynchPrediv = 0x7F;
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// Enable the RTC Clock
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RCC_RTCCLKCmd(ENABLE);
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// Wait for RTC APB registers synchronisation
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RTC_WaitForSynchro();
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// Configure the RTC data register and RTC prescaler
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RTC_InitTypeDef RTC_InitStructure;
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RTC_InitStructure.RTC_AsynchPrediv = uwAsynchPrediv;
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RTC_InitStructure.RTC_SynchPrediv = uwSynchPrediv;
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RTC_InitStructure.RTC_HourFormat = RTC_HourFormat_24;
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RTC_Init(&RTC_InitStructure);
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// Set the date (BCD)
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RTC_DateTypeDef RTC_DateStructure;
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RTC_DateStructure.RTC_Year = 0x13;
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RTC_DateStructure.RTC_Month = RTC_Month_October;
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RTC_DateStructure.RTC_Date = 0x26;
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RTC_DateStructure.RTC_WeekDay = RTC_Weekday_Saturday;
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RTC_SetDate(RTC_Format_BCD, &RTC_DateStructure);
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// Set the time (BCD)
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RTC_TimeTypeDef RTC_TimeStructure;
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RTC_TimeStructure.RTC_H12 = RTC_H12_AM;
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RTC_TimeStructure.RTC_Hours = 0x01;
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RTC_TimeStructure.RTC_Minutes = 0x53;
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RTC_TimeStructure.RTC_Seconds = 0x00;
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RTC_SetTime(RTC_Format_BCD, &RTC_TimeStructure);
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// Indicator for the RTC configuration
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RTC_WriteBackupRegister(RTC_BKP_DR0, 0x32F2);
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}
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#endif
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static void RTC_CalendarConfig(void);
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void rtc_init(void) {
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/*##-1- Configure the RTC peripheral #######################################*/
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RtcHandle.Instance = RTC;
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/* Configure RTC prescaler and RTC data registers */
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/* RTC configured as follow:
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- Hour Format = Format 24
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- Asynch Prediv = Value according to source clock
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- Synch Prediv = Value according to source clock
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- OutPut = Output Disable
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- OutPutPolarity = High Polarity
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- OutPutType = Open Drain */
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RtcHandle.Init.HourFormat = RTC_HOURFORMAT_24;
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RtcHandle.Init.AsynchPrediv = RTC_ASYNCH_PREDIV;
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RtcHandle.Init.SynchPrediv = RTC_SYNCH_PREDIV;
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RtcHandle.Init.OutPut = RTC_OUTPUT_DISABLE;
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RtcHandle.Init.OutPutPolarity = RTC_OUTPUT_POLARITY_HIGH;
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RtcHandle.Init.OutPutType = RTC_OUTPUT_TYPE_OPENDRAIN;
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machine_uint_t tick = HAL_GetTick();
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if(HAL_RTC_Init(&RtcHandle) != HAL_OK)
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{
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/* Initialization Error */
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//Error_Handler();
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return;
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}
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// record how long it took for the RTC to start up
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rtc_info = HAL_GetTick() - tick;
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/*##-2- Check if Data stored in BackUp register0: No Need to reconfigure RTC#*/
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/* Read the Back Up Register 0 Data */
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if(HAL_RTCEx_BKUPRead(&RtcHandle, RTC_BKP_DR0) != 0x32F2)
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{
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/* Configure RTC Calendar */
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RTC_CalendarConfig();
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}
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else
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{
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/* Check if the Power On Reset flag is set */
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if(__HAL_RCC_GET_FLAG(RCC_FLAG_PORRST) != RESET)
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{
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/* Turn on LED2: Power on reset occured */
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//BSP_LED_On(LED2);
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}
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/* Check if Pin Reset flag is set */
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if(__HAL_RCC_GET_FLAG(RCC_FLAG_PINRST) != RESET)
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{
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/* Turn on LED4: External reset occured */
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//BSP_LED_On(LED4);
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}
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/* Clear source Reset Flag */
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__HAL_RCC_CLEAR_RESET_FLAGS();
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}
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}
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static void RTC_CalendarConfig(void)
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{
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RTC_DateTypeDef sdatestructure;
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RTC_TimeTypeDef stimestructure;
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/*##-1- Configure the Date #################################################*/
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/* Set Date: Tuesday February 18th 2014 */
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sdatestructure.Year = 0x14;
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sdatestructure.Month = RTC_MONTH_FEBRUARY;
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sdatestructure.Date = 0x18;
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sdatestructure.WeekDay = RTC_WEEKDAY_TUESDAY;
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if(HAL_RTC_SetDate(&RtcHandle,&sdatestructure,FORMAT_BCD) != HAL_OK)
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{
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/* Initialization Error */
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//Error_Handler();
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return;
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}
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/*##-2- Configure the Time #################################################*/
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/* Set Time: 02:00:00 */
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stimestructure.Hours = 0x02;
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stimestructure.Minutes = 0x00;
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stimestructure.Seconds = 0x00;
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stimestructure.TimeFormat = RTC_HOURFORMAT12_AM;
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stimestructure.DayLightSaving = RTC_DAYLIGHTSAVING_NONE ;
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stimestructure.StoreOperation = RTC_STOREOPERATION_RESET;
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if(HAL_RTC_SetTime(&RtcHandle,&stimestructure,FORMAT_BCD) != HAL_OK)
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{
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/* Initialization Error */
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//Error_Handler();
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return;
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}
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/*##-3- Writes a data in a RTC Backup data Register0 #######################*/
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HAL_RTCEx_BKUPWrite(&RtcHandle,RTC_BKP_DR0,0x32F2);
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}
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/******************************************************************************/
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// Micro Python bindings
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mp_obj_t pyb_rtc_info(void) {
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return mp_obj_new_int(rtc_info);
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}
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MP_DEFINE_CONST_FUN_OBJ_0(pyb_rtc_info_obj, pyb_rtc_info);
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mp_obj_t pyb_rtc_read(void) {
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RTC_TimeTypeDef time;
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RTC_DateTypeDef date;
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HAL_RTC_GetTime(&RtcHandle, &time, FORMAT_BIN);
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HAL_RTC_GetDate(&RtcHandle, &date, FORMAT_BIN);
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printf("%02d-%02d-%04d %02d:%02d:%02d\n",date.Date, date.Month, 2000 + date.Year, time.Hours, time.Minutes, time.Seconds);
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return mp_const_none;
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}
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MP_DEFINE_CONST_FUN_OBJ_0(pyb_rtc_read_obj, pyb_rtc_read);
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