CC1312R: How to use RTC channel 1 and 2 with TI-RTOS7?

Hi Dimitar,

In TI-RTOS7 I suggest you use the tiposix layer to access the RTC. In particular you should use the ClockP module to set timers and manage delays. 

Below an example on how to set up a 1 second periodic callback using ClockP, but you can tweak the parameters to set it up as a one-shot as well.

This is just a modified version of the empty example to toggle the RED led using ClockP instead of sleep().

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/*
 *  ======== empty.c ========
 */

/* For usleep() */
#include <unistd.h>
#include <stdint.h>
#include <stddef.h>

/* Driver Header files */
#include <ti/drivers/GPIO.h>
// #include <ti/drivers/I2C.h>
// #include <ti/drivers/SPI.h>
// #include <ti/drivers/Watchdog.h>

/* Driver configuration */
#include "ti_drivers_config.h"

#include <ti/drivers/dpl/ClockP.h>


void clkCallback(uintptr_t arg0){

    GPIO_toggle(CONFIG_GPIO_LED_0);
}



/*
 *  ======== mainThread ========
 */
void *mainThread(void *arg0)
{
    /* 1000 second delay */
    uint32_t time = 1000;

    ClockP_Struct clkStruct;
    ClockP_Params clkParams;
    ClockP_Handle clkHandle = NULL;

    ClockP_Params_init(&clkParams);

    clkParams.period = 100000; // 100k RTC ticks (10us each) = 1s
    clkParams.startFlag = true; // start clock immediately after instance is created

    clkHandle = ClockP_construct(&clkStruct, clkCallback, 0, &clkParams);

    /* Call driver init functions */
    GPIO_init();
    // I2C_init();
    // SPI_init();
    // Watchdog_init();

    /* Configure the LED pin */
    GPIO_setConfig(CONFIG_GPIO_LED_0, GPIO_CFG_OUT_STD | GPIO_CFG_OUT_LOW);

    /* Turn on user LED */
    GPIO_write(CONFIG_GPIO_LED_0, CONFIG_GPIO_LED_ON);

    while (1)
    {
        sleep(time);
    }
}

You can find additional documentation on the tiposix calls in <SDK directory>/source/ti/drivers/dpl/ClockP.h

Regards,

Fausto

Hi Fausto,

I am not asking how to use Clock object, I am asking about direct use of RTC channel 1 and chanel 2 with TI_RTOS7.

I am using RTC CH1 capture to capture RTC time on external events and CH2 auto compare load capabilities to generate time periods which time will not drifts as a result on HWI or SWI enter latency (there could be jitter, but not drift).    

Previous version of TI-RTOS provide this with hooks functions within module ti.sysbios.family.arm.cc26xx.Timer.

So my question is how RTC CH1 and CH2 hardware could be used with new TI-RTOS7, not the clock object ?  

Regards,

Dimitar