RTOS: MSP432 Real Time Clock

Hi User,
You can look at the SYS/BIOS Seconds module for MSP432. It uses the RTC to provide APIs used by the SYS/BIOS time() function. You can find the code in <TI-RTOS_INSTALL_DIR>/products/bios_xx_xx_xx_xx/packages/ti/sysbios/family/arm/msp432/Seconds.c.
Best regards,
Janet

Thank you Janet,

I've tried:

   Seconds_set(1412800000);

    while (1) {

        uint32_t sec = Seconds_get();

        System_printf("Sec = %i\n", sec);

        System_flush();

        Task_sleep((UInt)arg0);

        GPIO_toggle(Board_LED0);

    }

And it seams to work.

Then I commented out the set command:

//Seconds_set(1412800000);

After the that the time does not increase every second.

I haven't unplugged the device from AC. 

Does it mean that I have to set the time every time I rebuild the program or my RTC is not working like it should.

Thank you!
Miha

Hi Miha,

For MSP432, Seconds_set() starts the real-time clock by clearing the RTCHOLD bit in the RTCCTL1 register.  On reset, the RTCHOLD bit is 1.  Here is the information from the data sheet:

Best regards,

Janet

Hi Janet,

Can you please help me, how do I set a value to a register in TI RTOS?

Thank you for your help.