https://devzone.nordicsemi.com/f/nordic-q-a/260/how-to-enable-disable-ppi-and-gpioteHi ,everyone: i design a pwm driver ,that contain one timer(TIMER2) and 4 ppi interface. 1.pwm(ppi and gpiote) Now,i have a problem with it not be Synchronous .when i pause one of pwm pin(by ppi) then reopen( call hal_pwm_go()) it not work correctlyen-USTelligent Community 13Mon, 12 Aug 2013 23:34:17 GMThttps://devzone.nordicsemi.com/thread/1379?ContentTypeID=1Mon, 12 Aug 2013 23:34:17 GMT137ad170-7792-4731-bb38-c0d22fbe4515:3089d986-c0e5-4e66-9bf7-a29b1a6ee569steven<p>Hi,</p> <p>about the second question, i find that is priorities issue. Because when i call sd_xx() function at the lower(prior 3,timer interrupt) that will hardfault error. so i have set that at high prior level(1).</p> <p><img src="http://img198.imageshack.us/i/ske4.png/" alt="http://img198.imageshack.us/i/ske4.png/" /></p> <p>but i can&#39;t Explanation the above Figure 71 API call section ,it is ok(low prior application interrupt to svc )?</p> <p>reference nRF51 reference nrF51_reference_manual.pdf p171 page.</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/1378?ContentTypeID=1Mon, 12 Aug 2013 07:45:08 GMT137ad170-7792-4731-bb38-c0d22fbe4515:29c0da0f-6ce5-4139-b2dd-88d7a7851469steven<p>thank you for your reply quickly. Now,i only try program at not using softdevice. so ,i not call sd_ppi_xx() function to setting the ppi .</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/1377?ContentTypeID=1Mon, 12 Aug 2013 07:33:04 GMT137ad170-7792-4731-bb38-c0d22fbe4515:8f5d2c9d-356f-421e-b2ae-7d7e75e1923eS&#233;bastien Despont<p>Hi,</p> <p>if you are using soft_device, you have to use functions sd_ppi_X to manage the PPI.</p><div style="clear:both;"></div>