clocktask

#include <stdbool.h>
#include <inc/hw_memmap.h>



#include <xdc/std.h>
#include <xdc/runtime/System.h>
#include <xdc/runtime/Error.h>

#include <ti/sysbios/BIOS.h>
#include <ti/sysbios/knl/Clock.h>
#include <ti/sysbios/knl/Task.h>
#include <ti/sysbios/knl/Event.h>
#include <ti/sysbios/knl/Semaphore.h>

#include <driverlib/gpio.h>
#include <driverlib/pin_map.h>/*supplies GPIO_PIN_x*/
#include <driverlib/sysctl.h>


Void clockfnc();
void blinkled();

Event_Handle eventtrg;


/*
 *  ======== main ========
 */
Int main()
{
    Clock_Params clkParams;
    Task_Params tskParams;

    SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOF);
    GPIOPadConfigSet(GPIO_PORTF_BASE, GPIO_PIN_0, GPIO_STRENGTH_2MA, GPIO_PIN_TYPE_STD);

    GPIOPinTypeGPIOOutput(GPIO_PORTF_BASE,GPIO_PIN_0);
    GPIOPinWrite(GPIO_PORTF_BASE, GPIO_PIN_0, 0x00);

    Error_Block eb;

    Error_init(&eb);

    eventtrg = Event_create(NULL, &eb);
    if (eventtrg == NULL) {
        System_abort("Event create failed");
    }




    /* Create a periodic Clock Instance with period = 1000 system time units */
    Clock_Params_init(&clkParams);
    clkParams.period = 1000;
    clkParams.startFlag = TRUE;
    Clock_create(clockfnc, 1000, &clkParams, NULL);

    /* create a ledblink task */
    Task_Params_init(&tskParams);
    tskParams.priority = 15;
    tskParams.arg0 = NULL;
    Task_create(blinkled, &tskParams, NULL);

    BIOS_start();    /* does not return */
    return(0);
}

/*
 *  ======== clockfnc =======
 */
Void clockfnc()
{
    /* Explicit posting of Event_Id_00 by calling Event_post() */
    Event_post(eventtrg, Event_Id_00);
}

void blinkled()
{
    static uint8_t ui8val = 0;
    UInt res;

    for (;;) {

        res = Event_pend(eventtrg,Event_Id_00,Event_Id_00,NULL);
        if (res != 0)
            ui8val=ui8val ^ 1;

        GPIOPinWrite (GPIO_PORTF_BASE, GPIO_PIN_0, ui8val);
    }

}