Implementing simple LED blink (10Hz) for 5 seconds?

[Mo A]

Hi All,

I am new to the field and working on nRF51822. As mentioned in the question, which is the easiest way to Implement a simple LED blink (10Hz) for 5 seconds?. Is it possible achieve this using the libraries that are provided in the SDK? eg. app_timer.c?

Please let me get started with this.

Regards, Mo

[FormerMember]

Hi there,

One way to make a LED blink every 5 second is to use a timer. In ble_app_hrs the heart rate measurement interval, HEART_RATE_MEAS_INTERVAL, uses for example a timer. The timer is initialized in timers_init(), and started in application_timers_start().

• Kristin

[Mo A]

Thanks Kristin ,

I am following this. But I am facing one issue , When I put the PRESCALER value as 327 and started timer as app_timer_start(timer_ID, 100, NULL);, It was giving only 920ms instead of 1s? why is this so?