Emulated counter

Emulated counter backend API. More...

Functions
int	counter_capture_emul_input_set (const struct device *dev, uint8_t chan_id, int level)
	Set the emulated capture input level on a channel.
static int	counter_capture_emul_input_set_dt (const struct counter_capture_dt_spec *spec, int level)
	Set the emulated capture input level on a channel from a DT spec.
int	counter_capture_emul_input_get (const struct device *dev, uint8_t chan_id)
	Get the emulated capture input level on a channel.
static int	counter_capture_emul_input_get_dt (const struct counter_capture_dt_spec *spec)
	Get the emulated capture input level on a channel from a DT spec.

Detailed Description

Emulated counter backend API.

Behaviour of the emulated counter capture is application-defined. Tests drive a capture event by setting the emulated input level on a capture channel with counter_capture_emul_input_set. When the level transition matches the edge the channel was configured for (via counter_capture_configure) and the channel is enabled, the registered capture callback is invoked synchronously, much like gpio_emul_input_set fires GPIO interrupt callbacks.

The edges an emulated counter supports are declared in devicetree using the rising-edge and falling-edge boolean properties on the counter node.

Function Documentation

counter_capture_emul_input_get()

int counter_capture_emul_input_get	(	const struct device *	dev,
		uint8_t	chan_id )

#include <zephyr/drivers/counter/counter_capture_emul.h>

Get the emulated capture input level on a channel.

Parameters

dev	Emulated counter device
chan_id	Capture channel ID

Returns

the current input level (0 or 1) on success

-EINVAL if chan_id is out of range

counter_capture_emul_input_get_dt()

int counter_capture_emul_input_get_dt ( const struct counter_capture_dt_spec * spec )

inlinestatic

#include <zephyr/drivers/counter/counter_capture_emul.h>

Get the emulated capture input level on a channel from a DT spec.

Equivalent to:

counter_capture_emul_input_get(spec->dev, spec->chan_id);

Parameters

spec	Counter capture DT spec

Returns

a value from counter_capture_emul_input_get()

counter_capture_emul_input_set()

int counter_capture_emul_input_set	(	const struct device *	dev,
		uint8_t	chan_id,
		int	level )

#include <zephyr/drivers/counter/counter_capture_emul.h>

Set the emulated capture input level on a channel.

Drives level on the emulated capture input of chan_id. If the resulting edge matches the channel's configured capture flags and the channel is enabled, the capture callback is invoked synchronously with the current counter value.

Parameters

dev	Emulated counter device
chan_id	Capture channel ID
level	New input level (0 or non-zero)

Returns

0 on success

-EINVAL if chan_id is out of range

counter_capture_emul_input_set_dt()

int counter_capture_emul_input_set_dt ( const struct counter_capture_dt_spec * spec, int level )

inlinestatic

#include <zephyr/drivers/counter/counter_capture_emul.h>

Set the emulated capture input level on a channel from a DT spec.

Equivalent to:

counter_capture_emul_input_set(spec->dev, spec->chan_id, level);

Parameters

spec	Counter capture DT spec
level	New input level (0 or non-zero)

Returns

a value from counter_capture_emul_input_set()