Posted on September 03, 2015 at 17:18Hey, I have encountered a interesting error. I have made a logger and to save power it goes to stop mode (~6-7ms), while the sensor is converting the results and to stand by mode (1-2s) till the next measurement. The datasheet says that while in stop mode the consumption should be ~40uA and in standby ~2-4uA. Now here is the question in standby mode the consumption is close to zero, while in stop mode it is ~20mA, so why? If the circuitry would be wrong the logger should always consume 20mA. The main code part looks like this:
RTC_Config();
PWR_EnterSTOPMode(PWR_LowPowerRegulator_ON, PWR_STOPEntry_WFI);
RCC_APB1PeriphClockCmd(RCC_APB1Periph_PWR, ENABLE);
/* Allow access to Backup */
PWR_BackupAccessCmd(ENABLE);
RTC_WakeUpCmd(DISABLE);
SYSCLKConfig_STOP();
GPIO_ResetBits(GPIOB, GPIO_Pin_14);
PWR_ClearFlag(PWR_FLAG_SB | PWR_FLAG_WU);
RTC_WaitForSynchro();
RTC_ClearFlag(RTC_FLAG_WUTF);
jumperTime = 1020;
RTC_SetWakeUpCounter(jumperTime);
RTC_WakeUpCmd(ENABLE);
PWR_EnterSTANDBYMode();
on each wake up it initializeses the RTC settings, and after Stop mode just changes the sleep duration. Have any of you encountered this?
