PWM with soft device

[Mohamed O.Abouzeid]

I'm working in a project & I want to use the PWM application provided by the SDK with the bluetooth module, I want to control the LEDs light intensity using the PWM, the PWM app is working well without using the softdevice, when I integrate the PWM with the ble application ,I faced a problem that it doesn't work, it didn't generate any warnings or errors I don't know the reason for that & how to overcome the problem.

thanks in advance

[Krzysztof Chruscinski]

Hi,

topic is well covered in this thread: https://devzone.nordicsemi.com/question/39809/sometimes-pwm-signal-is-reversed/.

Conclusion: if you take SDK 9.0 and library present there (components/pwm) and use patch provided in the topic above (will be present in next SDK release) you should get reliable output if your period is not too short (issues seen with period 64us, not seen with 128us). I guess that for LED you don't need such short period.