CC1312R: SimpleLink driver Timer callback from C++

Martin Helie

Part Number: CC1312R
Other Parts Discussed in Thread: SYSBIOS

Hello,

I have a C++ class which currently uses the TIRTOS Clock with a C callback wrapper function, along the lines of:

// Wrapper function for clock callback
extern "C" {
    void abstractClockTick(UArg arg0) {
        static RadioDevice *task = reinterpret_cast<RadioDevice*>(arg0);
        task->tick();
    }
}

...and the clock is initialized thus:

    Clock_Params clkParams;
    Clock_Params_init(&clkParams);
    clkParams.period    = 5000;
    clkParams.startFlag = TRUE;
    clkParams.arg       = (UArg)this;

I now need more accuracy and want to use a hardware timer through the Timer driver api, but it doesn't look like I can pass an argument (this) to the C function so it can reference the instance, per Timer doc: TI Drivers Runtime APIs

Is there a workaround?

over 4 years ago

0 Siri over 4 years ago

TI__Guru* 87001 points

I will assign someone o look into this for you.

Siri

0 Elin W over 4 years ago

TI__Genius 14845 points

Hi mh,

I don't understand why you need a workaround. If you need the clock to be configured a different way, you can configure it a different way. What accuracy do you need and can you share some details about your use-case?

Thanks,
Elin

0 Martin Helie over 4 years ago in reply to Elin W

Expert 2555 points

Hi Elin,

I was following guidelines from the TIRTOS documentation which states:

Each system tick, which is derived from the real-time clock RTC, launches a Clock object that compares the running tick count with the period of each clock to determine if the associated function should run. For higher-resolution timers, TI recommends using a 16-bit hardware timer channel or the sensor controller. See the Clock module in the package ti.sysbios.knl section of the TI-RTOS Kernel User Guide for more information on these functions.

So my aim was to set up a timer with a callback function, rather than the clock.

0 Elin W over 4 years ago in reply to Martin Helie

TI__Genius 14845 points

Hi mh,

You can read all about timers and see examples in the timers general documentation and device specific documentation.

I would also recommend you to read the chapter 13 of the CC1312R technical reference manual which discusses timers in more detail.

Thanks,
Elin

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CC1312R: SimpleLink driver Timer callback from C++