ztimer_convert_frac frequency conversion layer

Translates between clock tick rates. More...

Detailed Description

Translates between clock tick rates.

Translates the ticks of an underlying clock into virtual ticks at a different frequency. This module makes use of frac for calculating fractions using multiplicative inversions, avoiding integer divisions. frac trades accuracy for speed. Please see the documentation of frac for more details.

Files
file	convert_frac.h
	ztimer_convert_frac interface definitions

Data Structures
struct	ztimer_convert_frac_t
	ztimer_convert_frac frequency conversion layer class More...

Functions
void	ztimer_convert_frac_init (ztimer_convert_frac_t *self, ztimer_clock_t *lower, uint32_t freq_self, uint32_t freq_lower)
	ztimer_convert_frac_t constructor
void	ztimer_convert_frac_change_rate (ztimer_convert_frac_t *self, uint32_t freq_self, uint32_t freq_lower)
	Change the scaling without affecting the current count.

Function Documentation

ztimer_convert_frac_change_rate()

void ztimer_convert_frac_change_rate	(	ztimer_convert_frac_t *	self,
		uint32_t	freq_self,
		uint32_t	freq_lower
	)

Change the scaling without affecting the current count.

Parameters

[in]	self	pointer to instance being initialized
[in]	freq_self	desired frequency of this clock
[in]	freq_lower	frequency of the underlying clock

ztimer_convert_frac_init()

void ztimer_convert_frac_init	(	ztimer_convert_frac_t *	self,
		ztimer_clock_t *	lower,
		uint32_t	freq_self,
		uint32_t	freq_lower
	)

ztimer_convert_frac_t constructor

Parameters

[in]	self	pointer to instance being initialized
[in]	lower	pointer to underlying clock
[in]	freq_self	desired frequency of this clock
[in]	freq_lower	frequency of the underlying clock