pico_timer.c File Reference

Implementation of pico timer driver. More...

#include "no_os_error.h"
#include "no_os_util.h"
#include "no_os_timer.h"
#include "no_os_alloc.h"
#include "pico_timer.h"
#include "hardware/timer.h"
#include "hardware/irq.h"

Include dependency graph for pico_timer.c:

Macros
#define	PICO_ALARM_MAX_NB   4

Functions
int32_t	pico_timer_init (struct no_os_timer_desc **desc, const struct no_os_timer_init_param *param)
	Initialize the timer peripheral.
int32_t	pico_timer_remove (struct no_os_timer_desc *desc)
	Free the resources allocated by no_os_timer_init().
int32_t	pico_timer_start (struct no_os_timer_desc *desc)
	Start a timer.
int32_t	pico_timer_stop (struct no_os_timer_desc *desc)
	Stop a timer from counting.
int32_t	pico_timer_counter_get (struct no_os_timer_desc *desc, uint32_t *counter)
	Get the value of the counter register for the timer.
int32_t	pico_timer_counter_set (struct no_os_timer_desc *desc, uint32_t new_val)
	Set the timer counter register value.
int32_t	pico_timer_count_clk_get (struct no_os_timer_desc *desc, uint32_t *freq_hz)
	Get the timer clock frequency.
int32_t	pico_timer_count_clk_set (struct no_os_timer_desc *desc, uint32_t freq_hz)
	Set the timer clock frequency.
int32_t	pico_timer_get_elapsed_time_nsec (struct no_os_timer_desc *desc, uint64_t *elapsed_time)
	Get the elapsed time in nsec for the timer.

Variables
struct no_os_timer_desc *	pico_alarm_desc [PICO_ALARM_MAX_NB] = {NULL}
const struct no_os_timer_platform_ops	pico_timer_ops
	pico platform specific timer platform ops structure

Detailed Description

Implementation of pico timer driver.

Author

RBolboac (ramon.nosp@m.a.bo.nosp@m.lboac.nosp@m.a@an.nosp@m.alog..nosp@m.com)

Copyright 2022(c) Analog Devices, Inc.

SPDX-License-Identifier: BSD-3-Clause

Macro Definition Documentation

PICO_ALARM_MAX_NB

#define PICO_ALARM_MAX_NB   4

Function Documentation

pico_timer_count_clk_get()

int32_t pico_timer_count_clk_get	(	struct no_os_timer_desc *	desc,
		uint32_t *	freq_hz )

Get the timer clock frequency.

Parameters

[in]	desc	- Pointer to the device handler.
[out]	freq_hz	- The value in Hz of the timer clock.

Returns

0 in case of success, error code otherwise.

pico_timer_count_clk_set()

int32_t pico_timer_count_clk_set	(	struct no_os_timer_desc *	desc,
		uint32_t	freq_hz )

Set the timer clock frequency.

Parameters

[in]	desc	- Pointer to the device handler.
[in]	freq_hz	- The value in Hz of the new timer clock.

Returns

0 in case of success, error code otherwise.

pico_timer_counter_get()

int32_t pico_timer_counter_get	(	struct no_os_timer_desc *	desc,
		uint32_t *	counter )

Get the value of the counter register for the timer.

Parameters

[in]	desc	- Pointer to the device handler.
[out]	counter	- Pointer to the counter value.

Returns

-ENOSYS

pico_timer_counter_set()

int32_t pico_timer_counter_set	(	struct no_os_timer_desc *	desc,
		uint32_t	new_val )

Set the timer counter register value.

Parameters

[in]	desc	- Pointer to the device handler.
[in]	new_val	- The new value of the counter register.

Returns

-ENOSYS

pico_timer_get_elapsed_time_nsec()

int32_t pico_timer_get_elapsed_time_nsec	(	struct no_os_timer_desc *	desc,
		uint64_t *	elapsed_time )

Get the elapsed time in nsec for the timer.

Parameters

[in]	desc	- Pointer to the device handler.
[in]	elapsed_time	- The elapsed time in nsec.

Returns

0 in case of success, error code otherwise.

pico_timer_init()

int32_t pico_timer_init	(	struct no_os_timer_desc **	desc,
		const struct no_os_timer_init_param *	param )

Initialize the timer peripheral.

Parameters

desc	- The timer descriptor.
param	- The structure that contains the timer parameters.

Returns

0 in case of success, error code otherwise.

pico_timer_remove()

int32_t pico_timer_remove

(

struct no_os_timer_desc *

desc

)

Free the resources allocated by no_os_timer_init().

Parameters

desc	- The timer descriptor.

Returns

0 in case of success, error code otherwise.

pico_timer_start()

int32_t pico_timer_start

(

struct no_os_timer_desc *

desc

)

Start a timer.

Parameters

desc	- Pointer to the device handler.

Returns

0 in case of success, error code otherwise.

pico_timer_stop()

int32_t pico_timer_stop

(

struct no_os_timer_desc *

desc

)

Stop a timer from counting.

Parameters

desc	- Pointer to the device handler.

Returns

0 in case of success, error code otherwise.

Variable Documentation

pico_alarm_desc

struct no_os_timer_desc* pico_alarm_desc[PICO_ALARM_MAX_NB] = {NULL}

pico_timer_ops

const struct no_os_timer_platform_ops pico_timer_ops

Initial value:

= {
    .init = &pico_timer_init,
    .start = &pico_timer_start,
    .stop = &pico_timer_stop,
    .counter_get = &pico_timer_counter_get,
    .counter_set = &pico_timer_counter_set,
    .count_clk_get = &pico_timer_count_clk_get,
    .count_clk_set = &pico_timer_count_clk_set,
    .get_elapsed_time_nsec = &pico_timer_get_elapsed_time_nsec,
    .remove = &pico_timer_remove
}

pico platform specific timer platform ops structure

pico specific timer platform ops structure