You cannot select more than 25 topics Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
This repo is archived. You can view files and clone it, but cannot push or open issues/pull-requests.

207 lines
5.8 KiB
C

/**
* \file
*
* \brief Timer task functionality declaration.
*
* Copyright (c) 2014-2018 Microchip Technology Inc. and its subsidiaries.
*
* \asf_license_start
*
* \page License
*
* Subject to your compliance with these terms, you may use Microchip
* software and any derivatives exclusively with Microchip products.
* It is your responsibility to comply with third party license terms applicable
* to your use of third party software (including open source software) that
* may accompany Microchip software.
*
* THIS SOFTWARE IS SUPPLIED BY MICROCHIP "AS IS". NO WARRANTIES,
* WHETHER EXPRESS, IMPLIED OR STATUTORY, APPLY TO THIS SOFTWARE,
* INCLUDING ANY IMPLIED WARRANTIES OF NON-INFRINGEMENT, MERCHANTABILITY,
* AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT WILL MICROCHIP BE
* LIABLE FOR ANY INDIRECT, SPECIAL, PUNITIVE, INCIDENTAL OR CONSEQUENTIAL
* LOSS, DAMAGE, COST OR EXPENSE OF ANY KIND WHATSOEVER RELATED TO THE
* SOFTWARE, HOWEVER CAUSED, EVEN IF MICROCHIP HAS BEEN ADVISED OF THE
* POSSIBILITY OR THE DAMAGES ARE FORESEEABLE. TO THE FULLEST EXTENT
* ALLOWED BY LAW, MICROCHIP'S TOTAL LIABILITY ON ALL CLAIMS IN ANY WAY
* RELATED TO THIS SOFTWARE WILL NOT EXCEED THE AMOUNT OF FEES, IF ANY,
* THAT YOU HAVE PAID DIRECTLY TO MICROCHIP FOR THIS SOFTWARE.
*
* \asf_license_stop
*
*/
#ifndef _HAL_TIMER_H_INCLUDED
#define _HAL_TIMER_H_INCLUDED
#include <utils_list.h>
#include <hpl_timer.h>
#ifdef __cplusplus
extern "C" {
#endif
/**
* \addtogroup doc_driver_hal_timer
*
* @{
*/
/**
* \brief Timer mode type
*/
enum timer_task_mode { TIMER_TASK_ONE_SHOT, TIMER_TASK_REPEAT };
/**
* \brief Timer task descriptor
*
* The timer task descriptor forward declaration.
*/
struct timer_task;
/**
* \brief Timer task callback function type
*/
typedef void (*timer_cb_t)(const struct timer_task *const timer_task);
/**
* \brief Timer task structure
*/
struct timer_task {
struct list_element elem; /*! List element. */
uint32_t time_label; /*! Absolute timer start time. */
uint32_t interval; /*! Number of timer ticks before calling the task. */
timer_cb_t cb; /*! Function pointer to the task. */
enum timer_task_mode mode; /*! Task mode: one shot or repeat. */
};
/**
* \brief Timer structure
*/
struct timer_descriptor {
struct _timer_device device;
uint32_t time;
struct list_descriptor tasks; /*! Timer tasks list. */
volatile uint8_t flags;
};
/**
* \brief Initialize timer
*
* This function initializes the given timer.
* It checks if the given hardware is not initialized and if the given hardware
* is permitted to be initialized.
*
* \param[out] descr A timer descriptor to initialize
* \param[in] hw The pointer to the hardware instance
* \param[in] func The pointer to a set of function pointers
*
* \return Initialization status.
*/
int32_t timer_init(struct timer_descriptor *const descr, void *const hw, struct _timer_hpl_interface *const func);
/**
* \brief Deinitialize timer
*
* This function deinitializes the given timer.
* It checks if the given hardware is initialized and if the given hardware is
* permitted to be deinitialized.
*
* \param[in] descr A timer descriptor to deinitialize
*
* \return De-initialization status.
*/
int32_t timer_deinit(struct timer_descriptor *const descr);
/**
* \brief Start timer
*
* This function starts the given timer.
* It checks if the given hardware is initialized.
*
* \param[in] descr The timer descriptor of a timer to start
*
* \return Timer starting status.
*/
int32_t timer_start(struct timer_descriptor *const descr);
/**
* \brief Stop timer
*
* This function stops the given timer.
* It checks if the given hardware is initialized.
*
* \param[in] descr The timer descriptor of a timer to stop
*
* \return Timer stopping status.
*/
int32_t timer_stop(struct timer_descriptor *const descr);
/**
* \brief Set amount of clock cycles per timer tick
*
* This function sets the amount of clock cycles per timer tick for the given timer.
* It checks if the given hardware is initialized.
*
* \param[in] descr The timer descriptor of a timer to stop
* \param[in] clock_cycles The amount of clock cycles per tick to set
*
* \return Setting clock cycles amount status.
*/
int32_t timer_set_clock_cycles_per_tick(struct timer_descriptor *const descr, const uint32_t clock_cycles);
/**
* \brief Retrieve the amount of clock cycles in a tick
*
* This function retrieves how many clock cycles there are in a single timer tick.
* It checks if the given hardware is initialized.
*
* \param[in] descr The timer descriptor of a timer to convert ticks to
* clock cycles
* \param[out] cycles The amount of clock cycles
*
* \return The status of clock cycles retrieving.
*/
int32_t timer_get_clock_cycles_in_tick(const struct timer_descriptor *const descr, uint32_t *const cycles);
/**
* \brief Add timer task
*
* This function adds the given timer task to the given timer.
* It checks if the given hardware is initialized.
*
* \param[in] descr The timer descriptor of a timer to add task to
* \param[in] task A task to add
*
* \return Timer's task adding status.
*/
int32_t timer_add_task(struct timer_descriptor *const descr, struct timer_task *const task);
/**
* \brief Remove timer task
*
* This function removes the given timer task from the given timer.
* It checks if the given hardware is initialized.
*
* \param[in] descr The timer descriptor of a timer to remove task from
* \param[in] task A task to remove
*
* \return Timer's task removing status.
*/
int32_t timer_remove_task(struct timer_descriptor *const descr, const struct timer_task *const task);
/**
* \brief Retrieve the current driver version
*
* \return Current driver version.
*/
uint32_t timer_get_version(void);
/**@}*/
#ifdef __cplusplus
}
#endif
#endif /* _HAL_TIMER_H_INCLUDED */