common_sw_timer.c File Reference

Copyright (c) 2013-2018 Microchip Technology Inc.

and its subsidiaries.

#include "compiler.h"
#include "conf_common_sw_timer.h"
#include "common_hw_timer.h"
#include "common_sw_timer.h"
#include "system.h"
#include "board.h"

Functions
static bool	compare_time (uint32_t t1, uint32_t t2)
static uint32_t	gettime (void)
void	hw_expiry_cb (void)
void	hw_overflow_cb (void)
static void	internal_timer_handler (void)
static void	load_hw_timer (uint8_t timer_id)
static void	prog_ocr (void)
static void	start_absolute_timer (uint8_t timer_id, uint32_t point_in_time, FUNC_PTR handler_cb, void *parameter)
status_code_t	sw_timer_get_id (uint8_t *timer_id)
	Returns a timer id to be used before starting a timer. More...
uint32_t	sw_timer_get_residual_time (uint8_t timer_id)
uint32_t	sw_timer_get_time (void)
	Gets current time. More...
void	sw_timer_init (void)
	Initializes the Software Timer module. More...
bool	sw_timer_is_running (uint8_t timer_id)
	Checks whether a given timer is running or not. More...
uint32_t	sw_timer_next_timer_expiry_duration (void)
void	sw_timer_run_residual_time (uint32_t offset)
void	sw_timer_service (void)
	Handles Queues and Callbacks for Expired Timers. More...
status_code_t	sw_timer_start (uint8_t timer_id, uint32_t timer_count, sw_timeout_type_t timeout_type, FUNC_PTR timer_cb, void *param_cb)
	Starts a timer. More...
status_code_t	sw_timer_stop (uint8_t timer_id)
	Stops a running timer. More...
void	wakeup_cb (void *parameter)

Variables
static uint8_t	alloc_timer_id = 0
static uint_fast8_t	expired_timer_queue_head
static uint_fast8_t	expired_timer_queue_tail
static uint_fast8_t	running_timer_queue_head
static uint8_t	running_timers
bool	sys_sleep
volatile uint16_t	sys_time
	This is the most significant part of the system time. More...
timer_info_t	timer_array [TOTAL_NUMBER_OF_SW_TIMERS]
volatile bool	timer_trigger

static bool compare_time ( uint32_t  t1, uint32_t  t2  )

inlinestatic

Referenced by load_hw_timer(), and start_absolute_timer().

static uint32_t gettime ( void  )

inlinestatic

References common_tc_read_count(), and sys_time.

Referenced by load_hw_timer(), sw_timer_get_residual_time(), sw_timer_get_time(), and sw_timer_start().

static void internal_timer_handler ( void  )

static

References expired_timer_queue_head, expired_timer_queue_tail, load_hw_timer(), NO_TIMER, running_timer_queue_head, running_timers, and timer_trigger.

Referenced by start_absolute_timer(), sw_timer_service(), and sw_timer_stop().

static void load_hw_timer ( uint8_t  timer_id )

static

References timer_info_tag::abs_exp_timer, common_tc_compare_stop(), common_tc_delay(), compare_time(), gettime(), timer_info_tag::loaded, NO_TIMER, and timer_trigger.

Referenced by internal_timer_handler(), start_absolute_timer(), and sw_timer_stop().

static void prog_ocr ( void  )

static

References timer_info_tag::abs_exp_timer, common_tc_delay(), cpu_irq_restore(), cpu_irq_save(), HW_TIME_MASK, timer_info_tag::loaded, NO_TIMER, running_timer_queue_head, sys_time, and SYS_TIME_SHIFT_MASK.

Referenced by hw_overflow_cb().

static void start_absolute_timer ( uint8_t  timer_id, uint32_t  point_in_time, FUNC_PTR  handler_cb, void *  parameter  )

static

References timer_info_tag::abs_exp_timer, compare_time(), cpu_irq_restore(), cpu_irq_save(), FUNC_PTR, internal_timer_handler(), load_hw_timer(), timer_info_tag::loaded, timer_info_tag::next_timer_in_queue, NO_TIMER, timer_info_tag::param_cb, running_timer_queue_head, running_timers, and timer_info_tag::timer_cb.

Referenced by sw_timer_start().

void wakeup_cb

(

void *

parameter

)

uint8_t alloc_timer_id = 0

static

Referenced by sw_timer_get_id(), and sw_timer_init().

uint_fast8_t expired_timer_queue_head

static

Referenced by internal_timer_handler(), sw_timer_init(), sw_timer_service(), and sw_timer_stop().

uint_fast8_t expired_timer_queue_tail

static

Referenced by internal_timer_handler(), sw_timer_init(), sw_timer_service(), and sw_timer_stop().

uint_fast8_t running_timer_queue_head

static

Referenced by internal_timer_handler(), prog_ocr(), start_absolute_timer(), sw_timer_init(), sw_timer_next_timer_expiry_duration(), sw_timer_run_residual_time(), and sw_timer_stop().

uint8_t running_timers

static

Referenced by hw_expiry_cb(), internal_timer_handler(), start_absolute_timer(), sw_timer_init(), and sw_timer_stop().

bool sys_sleep

Referenced by hw_expiry_cb(), hw_overflow_cb(), and tmr_init().

volatile uint16_t sys_time

This is the most significant part of the system time.

The least one is timer1 itself. Exported since input capture units might want to know about this value as well.

Referenced by gettime(), hw_overflow_cb(), prog_ocr(), and sw_timer_init().

timer_info_t timer_array[TOTAL_NUMBER_OF_SW_TIMERS]

volatile bool timer_trigger

Referenced by hw_expiry_cb(), internal_timer_handler(), load_hw_timer(), and sw_timer_init().