nrf51422a led intensity control

[Mohamed O.Abouzeid]

I wonder if I can ask about the leds intensity control:

I need to control the led intensity without the PWM because I'm using the softdevice & PWM didn't work with it, I'm thinking of applying a waveform of zeros& ones to led & the resultant intensity depends on how much ones in the waveform I need another method as the previous one didn't work

[Krzysztof Chruscinski]

Hi,

have you tried PWM (app_pwm) from SDK? It's working fine with SoftDevice. Another thing that you could try is to use app_timer to create software-controlled low power, low frequency PWM. It's not precise because of other interrupts (mainly softdevice) but might be good enough for LED intensity changing. BTW you will find such module in upcoming SDK.

[Mohamed O.Abouzeid]

the main problem is that the softdevice reserve some resources like timers & the pwm need to use these resources, how to manage on that?

I tried to put the pwm functions before the softdevice (ble stack init) and after it but no gain is this a sample code showing me how to use it ? ?