RTC lags
Hi I am having lags in the RTC after one day.
I am currently using the Nucleo L476RG board, the RTC oscillator is LSE and my CubeIDE version is 1.6.1. It seems as if in the time intervals where I do not read the RTC it is not updated. The next table shows the difference between the PC hour and the RTC hour.
Here is a part of my code:
A brief explanation of my code. It compares the date and time of the RTC with a file stored on the SD card. Then, if it is at the right timae, it writes the date and time to a data log and sends a data through the UART 4. Then it waits X time (using the getTicks function line 47).
My interest is that there is no delay between the RTC and the real time.
Help me!
while ( (RTC_info.year == Line_info.start_year) &&
(RTC_info.month == Line_info.start_month) &&
(RTC_info.day == Line_info.start_day))
{
// Read RTC
rtc_get_time_normal(&RTC_info);
//rtc_print(&RTC_info);
int check_hour = hour_is_between(RTC_info, Line_info);
if (check_hour == -1)
{
//deb_println("Waiting for the time interval");
{};
}
else if (check_hour == 1)
{
//! Hour are equals
rtc_get_time_normal(&RTC_info);
while (hour_is_between(RTC_info, Line_info) == 1)
{
// Change the random value
if (cnt_random >= 5)
{
cnt_random = 0;
generate_random_float(&random_value);
}
sd_create_file(dossier_log);
//! Generated random vale size 10 characters
float_to_string(random_value, str_random_val);
rtc_get_time_normal(&RTC_info);
char* str = string_csv_file(str_random_val, RTC_info, Line_info);
deb_println("Writing in log.txt");
sd_write_line(dossier_log, str);
send_KIM_data_msg(KIM, str_random_val, strlen(str_random_val));
free(str);
uint32_t now = HAL_GetTick();
while( (HAL_GetTick() - now) < (Trans_Period * 1000) )
{
{};
}
}
}
}Here is the function that allows to store the RTC value in a structure that I created.
uint8_t rtc_get_time_normal(struct time_info *time_param)
{
/**
* This function allows to obtain the time in a normal
* format (human). The values are stored in a structure
* pointer
*/
uint8_t ack = false;
RTC_DateTypeDef gDate;
RTC_TimeTypeDef gTime;
__HAL_RTC_WRITEPROTECTION_DISABLE(&hrtc);
if (HAL_RTC_WaitForSynchro(&hrtc) != HAL_OK)
{
return false;
}
HAL_RTC_GetTime(&hrtc, &gTime, RTC_FORMAT_BIN);
HAL_RTC_GetDate(&hrtc, &gDate, RTC_FORMAT_BIN);
time_param->year = gDate.Year;
time_param->month = gDate.Month;
time_param->day = gDate.Date;
time_param->hour = gTime.Hours;
time_param->minute = gTime.Minutes;
time_param->second = gTime.Seconds;
return ack;
}