https://devzone.nordicsemi.com/f/nordic-q-a/21865/nrf51822-pwm-failureI am trying to add the example in examples\peripheral\pwm_library to another project to get pwm working. In the other project I have included all necessary stuff but I get: ..\..\..\main.c(59): error: #20: identifier &quot;TIMER1_INSTANCE_INDEX&quot; is undefineden-USTelligent Community 13Mon, 08 May 2017 08:43:34 GMThttps://devzone.nordicsemi.com/thread/85856?ContentTypeID=1Mon, 08 May 2017 08:43:34 GMT137ad170-7792-4731-bb38-c0d22fbe4515:d3081226-1c5f-449c-80d7-b8329b4b3427Sigurd<p>Have you set <code>TIMER1_ENABLED</code> to 1 ? You can set this in <code>nrf_drv_config.h</code>(SDK version 11 and prior) or <code>sdk_config.h</code>(from SDK version 12)</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/85857?ContentTypeID=1Sun, 07 May 2017 15:46:57 GMT137ad170-7792-4731-bb38-c0d22fbe4515:c502220a-9407-4ca2-89ed-81625a417ad5dingari<p>Might be related to this: <a href="https://devzone.nordicsemi.com/question/39716/app_pwm_instance-error/">devzone.nordicsemi.com/.../</a></p> <p>Did you enable the peripheral?</p><div style="clear:both;"></div>