Explanation of pwm example code please

[nordicdev]

Hi, I need to configure pwm with 14uSec off time and 46uSec on time. I had a look at the pwm example in the install directory and also : developer.nordicsemi.com/.../a00039.html. But it is bit confusing, in the sense, if I need to set a duty cycle of 25% which registers to change. When I change the duty_cycle to 250, or, 100(in the local variable "duty_cycle"), there is no effect in the PWM wave generated. The On and Off times are 256msec always. Even tried pressing the configured buttons, but still no change in duty cycle. Attached my code here: main.c

Questions:

1. Which register to change to set a desired duty cycle(say 25% off time and 75% on time)
2. If I want to use the same PWM module for generating 25% duty cycle outputting on PIN1 for the first time, then 100% duty cycle outputting on PIN2 the next time and the above continues forever, do I need to deinit the gpiote and configure(nrf_gpio_tsk_config) every time I swap the PWM pins?

[nordicdev]

Thanks Ole. It works. But, I need softdevice + PWM to work. This is because I need BLE and control the duty cycle of the PWM pulses from the bonded BLE mode from the mobile phone App. As I need PWM pulses of on time 42usec and off time 14usec, this would be disturbed if softdevice is used, because softdevice has higher IRQ priority than timer. How to handle this situation? Thanks