stmhal: Clean up rtc.c a bit.
This commit is contained in:
Damien George
parent
7533700393
commit
83407ad082
154
stmhal/rtc.c
154
stmhal/rtc.c
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@ -7,15 +7,13 @@
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#include "qstr.h"
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#include "obj.h"
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#include "runtime.h"
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//#include "systick.h"
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#include "rtc.h"
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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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// rtc_info indicates various things about RTC startup
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// it's a bit of a hack at the moment
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static machine_uint_t rtc_info;
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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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@ -23,6 +21,10 @@ static machine_uint_t rtc_info;
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#define RTC_SYNCH_PREDIV (0x00ff)
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#if 0
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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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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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@ -124,100 +126,82 @@ void rtc_init(void) {
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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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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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/* 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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- 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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if (HAL_RTC_Init(&RTCHandle) != HAL_OK) {
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// init error
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rtc_info = 0xffff; // indicate error
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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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// check data stored in BackUp register0
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if (HAL_RTCEx_BKUPRead(&RTCHandle, RTC_BKP_DR0) != 0x32f2) {
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// fresh reset; configure RTC Calendar
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RTC_CalendarConfig();
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} else {
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// RTC was previously set, so leave it alon
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if(__HAL_RCC_GET_FLAG(RCC_FLAG_PORRST) != RESET) {
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// power on reset occured
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rtc_info |= 0x10000;
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}
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if(__HAL_RCC_GET_FLAG(RCC_FLAG_PINRST) != RESET) {
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// external reset occured
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rtc_info |= 0x20000;
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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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/* 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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static void RTC_CalendarConfig(void) {
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// set the date to 1st Jan 2014
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RTC_DateTypeDef date;
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date.Year = 0x14;
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date.Month = RTC_MONTH_JANUARY;
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date.Date = 0x01;
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date.WeekDay = RTC_WEEKDAY_WEDNESDAY;
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if(HAL_RTC_SetDate(&RTCHandle, &date, FORMAT_BCD) != HAL_OK) {
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// init error
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return;
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}
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// set the time to 00:00:00
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RTC_TimeTypeDef time;
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time.Hours = 0x00;
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time.Minutes = 0x00;
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time.Seconds = 0x00;
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time.TimeFormat = RTC_HOURFORMAT12_AM;
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time.DayLightSaving = RTC_DAYLIGHTSAVING_NONE;
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time.StoreOperation = RTC_STOREOPERATION_RESET;
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if (HAL_RTC_SetTime(&RTCHandle, &time, FORMAT_BCD) != HAL_OK) {
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// init error
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return;
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}
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// write data to indicate the RTC has been set
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HAL_RTCEx_BKUPWrite(&RTCHandle, RTC_BKP_DR0, 0x32f2);
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}
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/******************************************************************************/
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