RTOS/CC2650: CC2650

I took a look at that before building my project, but my problem is:

     when I use duty in US, my function run correctly,

     when I use duty in FRACTION, my function only work if I don't use PWM_setDuty(); .My func like this:

void pwm_demo(UArg arg0, UArg arg1)
{
uint16_t pwmfrequences = 1000;

uint16_t duty = 0;
uint16_t dutyInc = 2.5;

PWM_Params_init(&pwmParams);
pwmParams.periodUnits = PWM_PERIOD_HZ;
pwmParams.periodValue = 1e3;
pwmParams.dutyUnits = PWM_DUTY_FRACTION;// mode fraction doesn't work
pwmParams.dutyValue = 20; //%
pwmParams.idleLevel = PWM_IDLE_HIGH;
pwmHandle = PWM_open(Board_PWM1, &pwmParams);

if (pwmHandle == NULL) {
System_abort("Board_PWM1 did not open");
}

PWM_start(pwmHandle);

}

=> my led is dim because I set duty value  = 20% right.

     and when I add this:

while(1)
{
PWM_setDuty(pwmHandle, duty);

duty = duty + dutyInc;
if(duty == 100 || duty == 0)
dutyInc = -dutyInc;
Task_sleep(5000);
}

with dutyInc = 2.5; //%

       duty = 0;

=>  my led is not toggle anymore and I don't know why.

Hello,

  PWM_DUTY_FRACTION: The duty is in a fractional part of the period where 0 is 0% and PWM_DUTY_FRACTION_MAX is 100%. Therefore, try the following:

Void pwmLEDFxn(UArg arg0, UArg arg1)
{
    PWM_Handle pwm1;
    PWM_Params params;
    uint32_t   duty = 0;
    float percentage = 0;

    PWM_Params_init(&params);
    params.dutyValue = PWM_DUTY_FRACTION_MAX;
    pwm1 = PWM_open(Board_PWM0, &params);

    if (pwm1 == NULL) {
        System_abort("Board_PWM0 did not open");
    }
    PWM_start(pwm1);

    /* Loop forever incrementing the PWM duty */
    while (1) {
        duty = (percentage / 100) * PWM_DUTY_FRACTION_MAX;
        PWM_setDuty(pwm1, duty);
        Task_sleep((UInt) arg0);
        percentage += 1;

        if (percentage > 100)
        {
            percentage = 0;
        }
    }
}

Hopefully this helps.

  David

Thank you so much David, I copied your function into my program but it didn't work, the led was not dim

I don;t know if it because of hardware or not,   PWM_DUTY_US is still ok.