Interpretation of built-in routines of the nrf51 SDK

Simple PWM motor control example simple_pwm_motor_control_example

In fact, it is PWM to control the LED brightness.

1. First, set gpiote to a high level
2. Then set the compare0 and compare1 of the PPI timer timer2 to trigger gpiote flip.
3. Set the timer timer2 pre-division to 4 by clock 16 MHz per tick = 16000000/2 ^ 4 exactly for 1us
Set low point with cc0 as PWM to full PWM cycle CC2 enable compare2 interrupt compare1 reset for PWM High Point
The execution sequence should be cc0-> CC2-> cc0-> cc0 triggered interruption at the gap between CC2 and cc0, thus changing the PWM duty cycle.

Interpretation of built-in routines of the nrf51 SDK