https://devzone.nordicsemi.com/f/nordic-q-a/2136/a-rproblem-on-ppiI want to generate a pulse signal with PPI, timer2 and gpiote. But it doesn&#39;t work. Anything wrong with my code? void init_timer1() { NRF_TIMER1-&gt;PRESCALER = 1; NRF_TIMER1-&gt;TASKS_CLEAR = 1; NRF_TIMER1-&gt;BITMODE = TIMER_BITMODE_BITMODE_16Bit; NRF_TIMER1en-USTelligent Community 13Thu, 10 Apr 2014 22:55:13 GMThttps://devzone.nordicsemi.com/thread/9096?ContentTypeID=1Thu, 10 Apr 2014 22:55:13 GMT137ad170-7792-4731-bb38-c0d22fbe4515:a99b2c2f-0b73-4e96-93c7-b942d77d3a12ovrebekk<p>Hi</p> <p>You can&#39;t have more than one GPIOTE channel controlling the same pin. If you want to both set and clear a pin through the GPIOTE you have to use the toggle polarity configuration, and use the same GPIOTE channel both for clearing and setting the pin.</p> <p>I don&#39;t know exactly what type of application you are developing, but for an example of PWM on the nrF51822 please have a look at the following thread: <a href="https://devzone.nordicsemi.com/index.php/is-there-an-example-code-for-using-pwm-on-the-nrf51822-with-a-softdevice">devzone.nordicsemi.com/.../is-there-an-example-code-for-using-pwm-on-the-nrf51822-with-a-softdevice</a></p> <p>Best regards Torbjørn</p><div style="clear:both;"></div>