pwm.h File Reference

Go to the source code of this file.

Macros
PWM period set helpers
The period cell in the PWM specifier needs to be provided in nanoseconds. However, in some applications it is more convenient to use another scale.
#define	PWM_NSEC(x)   (x)
	Specify PWM period in nanoseconds.
#define	PWM_USEC(x)   (PWM_NSEC(x) * 1000UL)
	Specify PWM period in microseconds.
#define	PWM_MSEC(x)   (PWM_USEC(x) * 1000UL)
	Specify PWM period in milliseconds.
#define	PWM_SEC(x)   (PWM_MSEC(x) * 1000UL)
	Specify PWM period in seconds.
#define	PWM_HZ(x)   (PWM_SEC(1UL) / (x))
	Specify PWM frequency in hertz.
#define	PWM_KHZ(x)   (PWM_HZ((x) * 1000UL))
	Specify PWM frequency in kilohertz.
PWM polarity flags
The PWM_POLARITY_* flags are used with pwm_set_cycles(), pwm_set() or pwm_configure_capture() to specify the polarity of a PWM channel. The flags are on the lower 8bits of the pwm_flags_t
#define	PWM_POLARITY_NORMAL   (0 << 0)
	PWM pin normal polarity (active-high pulse).
#define	PWM_POLARITY_INVERTED   (1 << 0)
	PWM pin inverted polarity (active-low pulse).