Flicker LEDs to indicate full brightness

RE: Flicker LEDs to indicate full brightness

Petter Myhre — Mon, 30 Jan 2017 12:49:32 GMT

Thank you for adding an answer.

RE: Flicker LEDs to indicate full brightness

Bryan H — Fri, 27 Jan 2017 21:27:10 GMT

For completeness, I ended up using a timer to call the flicker code below.

if (myData.powerState == 1)
{
	if (flickerNumber <= 11 && flickerNumber !=0)
		{
		if (pwmValue[myData.pwmIndex] >= 50)
			{
			if (flickerNumber % 2)
				{
				app_pwm_channel_duty_set(&PWM1, 0, pwmValue[(sizeof pwmValue / sizeof *pwmValue - 1)]);
				}
			else
				{
				app_pwm_channel_duty_set(&PWM1, 0, 35);
				}
			++flickerNumber;
			}
		if (pwmValue[myData.pwmIndex] < 50)
			{
			if (flickerNumber % 2)
				{
				app_pwm_channel_duty_set(&PWM1, 0, 0);
				}
			else
				{
				app_pwm_channel_duty_set(&PWM1, 0, pwmValue[myData.pwmIndex]);
				}
			++flickerNumber;
			}

		}
	if (flickerNumber >= 12)
	{
		flickerNumber = 0;
		if (outputLedState == false)
		{
			switchLedsOff();
		}
		else if (outputLedState == true)
		{
			switchLedsOn();
		}
	}
}

RE: Flicker LEDs to indicate full brightness

Petter Myhre — Mon, 07 Nov 2016 12:42:49 GMT

Is the problem is that the timer interrupt is not able to interrupt the flicker code? Then one solution is to run the flicker code in a context with lower priority, or increase the priority of the timer interrupt. But if the timer interrupt is able to interrupt the flicker code it could affect the delay between the playbacks. Another solution would be to use a hardware timer instead of nrf_delay_ms(), then the timer interrupt could be handled inbetween.