pwm_set_relative_duty_cycle — Set a relative duty cycle value
int pwm_set_relative_duty_cycle ( | struct pwm_state * state, |
| unsigned int duty_cycle, | |
unsigned int scale); |
statePWM state to fill
duty_cyclerelative duty cycle value
scale
scale in which duty_cycle is expressed
This functions converts a relative into an absolute duty cycle (expressed in nanoseconds), and puts the result in state->duty_cycle.
For example if you want to configure a 50% duty cycle, call:
pwm_init_state(pwm, state); pwm_set_relative_duty_cycle(state, 50, 100); pwm_apply_state(pwm, state);
This functions returns -EINVAL if duty_cycle and/or scale are
inconsistent (scale == 0 or duty_cycle > scale).