RE: LE1 cann't enter interrupt function after RTC wake up

Håkon Alseth — Tue, 13 May 2014 12:04:09 GMT

Hi,

The RTC will first wakeup on a pre-start time (see page 97 in the datasheet) to make sure that the clock sources are running.

Add this to your main while loop:


        LED3=!LED3;
        PWRDWN = 4;
        PWRDWN = 0;
        // Device will wake up on pre-TICK. Set to STANDBY until actually TICK occurs.
        // If this next line is commented out, Race condition will occur: the device will go into REG_RET without running the TICK routine!
        PWRDWN = 7;
        PWRDWN = 0;

Note: Theres no need to init the RTC again in the while loop, as you've already init'ed it before going into the while loop.

Best regards Håkon