RE: Reassign PWM pin

Ole Bauck — Tue, 15 Dec 2015 10:01:39 GMT

You can have max 4 pwm channels, this is also limited to the number of GPIOTE channels on nRF51 which is 4.

The PWM driver in the SDK runs with SoftDevice, but in SDK 9 there was problems regarding the app_pwm_init and app_pwm_enable functions. You should use the driver from SDK 10 (either do your project in this SDK or use the app_pwm files from this SDK). This driver have fixed a lot of things.

You will have to uninit the pwm, assign a new pin and then init the pwm again to switch pin. More detailed:

err_code = app_pwm_uninit(&PWM);
APP_ERROR_CHECK(err_code);

pwm_cfg.pins[0] = LED1;  //new pin

err_code = app_pwm_init(&PWM,&pwm_cfg,pwm_ready_callback);
APP_ERROR_CHECK(err_code);

app_pwm_enable(&PWM);