timer.c File Reference

D21 implementation of the timer interface.

Copyright (c) 2017-2019 Microchip Technology Inc. and its subsidiaries.

#include "AWS_SDK/aws_iot_src/protocol/mqtt/aws_iot_embedded_client_wrapper/timer_interface.h"

Functions
void	countdown (Timer *timer, unsigned int timeout)
	count down timer function. More...
void	countdown_ms (Timer *timer, unsigned int timeout)
	count down timer function. More...
char	expired (Timer *timer)
	Timer expiry check function. More...
uint32_t	getTimeInMillis (void)
	Get time in milliseconds. More...
void	InitTimer (Timer *timer)
	Timer intialization function. More...
int	left_ms (Timer *timer)
	Time avaible for timer expiry function. More...

Variables
volatile uint32_t	ms_ticks
	SysTick counter to avoid busy wait delay. More...

void countdown	(	Timer *	timer,
		unsigned int	timeout
	)

count down timer function.

Create a timer (seconds)

Parameters

[in]	timer	Timer to be started.
[in]	timeout	timeout in seconds.

Returns

None.

References Timer::end_time, getTimeInMillis(), and Timer::offset.

Referenced by addToAckWaitList(), cycle(), keepalive(), MQTTConnect(), and subscribeToShadowActionAcks().

void countdown_ms	(	Timer *	timer,
		unsigned int	timeout
	)

count down timer function.

Create a timer (milliseconds)

Parameters

[in]	timer	Timer to be started.
[in]	timeout	timeout in milliseconds.

Returns

None.

References Timer::end_time, getTimeInMillis(), and Timer::offset.

Referenced by handleReconnect(), keepalive(), MQTTConnect(), MQTTDisconnect(), MQTTPublish(), MQTTResubscribe(), MQTTSubscribe(), MQTTUnsubscribe(), and MQTTYield().

char expired

(

Timer *

timer

)

Timer expiry check function.

Check if a timer is expired.

Parameters

[in]

timer

Timer to be checked.

Returns

time to expiry.

References Timer::end_time, getTimeInMillis(), and Timer::offset.

Referenced by HandleExpiredResponseCallbacks(), handleReconnect(), keepalive(), MQTTYield(), sendPacket(), subscribeToShadowActionAcks(), and waitfor().

uint32_t getTimeInMillis

(

void

)

Get time in milliseconds.

Returns

milli second ticks count.

References ms_ticks.

Referenced by countdown(), countdown_ms(), expired(), and left_ms().

void InitTimer

(

Timer *

timer

)

Timer intialization function.

Initialize a timer.

Parameters

[in]

timer

Timer to be intialized.

Returns

None.

References Timer::end_time, and Timer::offset.

Referenced by addToAckWaitList(), keepalive(), MQTTClient(), MQTTConnect(), MQTTDisconnect(), MQTTPublish(), MQTTResubscribe(), MQTTSubscribe(), MQTTUnsubscribe(), MQTTYield(), and subscribeToShadowActionAcks().

int left_ms

(

Timer *

timer

)

Time avaible for timer expiry function.

Check the time remaining on a give timer.

Parameters

[in]

timer

Timer to be started.

Returns

Time for expiry in milliseconds.

References Timer::end_time, getTimeInMillis(), and Timer::offset.

Referenced by readPacket(), and sendPacket().

volatile uint32_t ms_ticks

SysTick counter to avoid busy wait delay.

TLS read functionality.

Referenced by button_press_duration(), getTimeInMillis(), and SysTick_Handler().