stephen mathenge / Mbed OS final-water-level_2

How to measure water in a reservoir

Dependencies:   Cayenne-MQTT-mbed Cayenne-LPP

inc/standby.h@0:7bfeb237e600, 2019-03-08 (annotated)

Committer:
wamae
Date:
Fri Mar 08 11:34:56 2019 +0000
Revision:
0:7bfeb237e600
working code

Who changed what in which revision?

UserRevisionLine numberNew contents of line
wamae 0:7bfeb237e600 1 #ifndef _DSA_STANDBY_H_
wamae 0:7bfeb237e600 2 #define _DSA_STANDBY_H_
wamae 0:7bfeb237e600 3
wamae 0:7bfeb237e600 4 #include "mbed.h"
wamae 0:7bfeb237e600 5 #include "rtc_api_hal.h"
wamae 0:7bfeb237e600 6
wamae 0:7bfeb237e600 7 enum WakeupType {
wamae 0:7bfeb237e600 8 WAKEUP_RESET,
wamae 0:7bfeb237e600 9 WAKEUP_TIMER,
wamae 0:7bfeb237e600 10 WAKEUP_PIN
wamae 0:7bfeb237e600 11 };
wamae 0:7bfeb237e600 12
wamae 0:7bfeb237e600 13 static RTC_HandleTypeDef RtcHandle;
wamae 0:7bfeb237e600 14
wamae 0:7bfeb237e600 15 void rtc_set_wake_up_timer_s(uint32_t delta)
wamae 0:7bfeb237e600 16 {
wamae 0:7bfeb237e600 17 uint32_t clock = RTC_WAKEUPCLOCK_CK_SPRE_16BITS;
wamae 0:7bfeb237e600 18
wamae 0:7bfeb237e600 19 // HAL_RTCEx_SetWakeUpTimer_IT will assert that delta is 0xFFFF at max
wamae 0:7bfeb237e600 20 if (delta > 0xFFFF) {
wamae 0:7bfeb237e600 21 delta -= 0x10000;
wamae 0:7bfeb237e600 22 clock = RTC_WAKEUPCLOCK_CK_SPRE_17BITS;
wamae 0:7bfeb237e600 23 }
wamae 0:7bfeb237e600 24
wamae 0:7bfeb237e600 25 RtcHandle.Instance = RTC;
wamae 0:7bfeb237e600 26
wamae 0:7bfeb237e600 27 HAL_StatusTypeDef status = HAL_RTCEx_SetWakeUpTimer_IT(&RtcHandle, delta, clock);
wamae 0:7bfeb237e600 28
wamae 0:7bfeb237e600 29 if (status != HAL_OK) {
wamae 0:7bfeb237e600 30 printf("Set wake up timer failed: %d\n", status);
wamae 0:7bfeb237e600 31 NVIC_SystemReset();
wamae 0:7bfeb237e600 32 }
wamae 0:7bfeb237e600 33 }
wamae 0:7bfeb237e600 34
wamae 0:7bfeb237e600 35 WakeupType get_wakeup_type() {
wamae 0:7bfeb237e600 36
wamae 0:7bfeb237e600 37 if(READ_BIT(RTC->ISR, RTC_ISR_WUTF))
wamae 0:7bfeb237e600 38 return WAKEUP_TIMER;
wamae 0:7bfeb237e600 39
wamae 0:7bfeb237e600 40 // this is set by timer too, but that's checked already
wamae 0:7bfeb237e600 41 // above.
wamae 0:7bfeb237e600 42 if(READ_BIT(PWR->CSR, PWR_CSR_WUF))
wamae 0:7bfeb237e600 43 return WAKEUP_PIN;
wamae 0:7bfeb237e600 44
wamae 0:7bfeb237e600 45 return WAKEUP_RESET;
wamae 0:7bfeb237e600 46 }
wamae 0:7bfeb237e600 47
wamae 0:7bfeb237e600 48 void standby(int seconds) {
wamae 0:7bfeb237e600 49 printf("Going to sleep!\n");
wamae 0:7bfeb237e600 50
wamae 0:7bfeb237e600 51 core_util_critical_section_enter();
wamae 0:7bfeb237e600 52
wamae 0:7bfeb237e600 53 // Clear wakeup flag, just in case.
wamae 0:7bfeb237e600 54 SET_BIT(PWR->CR, PWR_CR_CWUF);
wamae 0:7bfeb237e600 55
wamae 0:7bfeb237e600 56 // Enable wakeup timer.
wamae 0:7bfeb237e600 57 rtc_set_wake_up_timer_s(seconds);
wamae 0:7bfeb237e600 58
wamae 0:7bfeb237e600 59 // Enable debug interface working in standby. Causes power consumption to increase drastically while in standby.
wamae 0:7bfeb237e600 60 //HAL_DBGMCU_EnableDBGStandbyMode();
wamae 0:7bfeb237e600 61
wamae 0:7bfeb237e600 62 HAL_PWR_EnterSTANDBYMode();
wamae 0:7bfeb237e600 63
wamae 0:7bfeb237e600 64 // this should not happen...
wamae 0:7bfeb237e600 65 rtc_deactivate_wake_up_timer();
wamae 0:7bfeb237e600 66 core_util_critical_section_exit();
wamae 0:7bfeb237e600 67
wamae 0:7bfeb237e600 68 // something went wrong, let's reset
wamae 0:7bfeb237e600 69 NVIC_SystemReset();
wamae 0:7bfeb237e600 70 }
wamae 0:7bfeb237e600 71
wamae 0:7bfeb237e600 72 #endif // _DSA_STANDBY_H_