timer.h File Reference

#include <stdint.h>
#include <stdbool.h>
#include "libhw/hardware.h"

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Macros
#define	timer_metadata_init_(_name, _base, _frequency, _interrupt, _periodic)
#define	timer_metadata_init(_base, _frequency, _interrupt, _periodic)   timer_metadata_init_(timer_metadata, _base, _frequency, _interrupt, _periodic)

Functions
void	timer_add_interrupt (hw_metadata metadata)

Macro Definition Documentation

#define timer_metadata_init	(		_base,
			_frequency,
			_interrupt,
			_periodic
	)		timer_metadata_init_(timer_metadata, _base, _frequency, _interrupt, _periodic)

Create a struct named `timer_metadata'.

Definition at line 21 of file timer.h.

Referenced by button_debounce_start(), main(), sA_Handler(), TIMER0A_Handler(), TIMER1A_Handler(), and TIMER2A_Handler().

#define timer_metadata_init_	(		_name,
			_base,
			_frequency,
			_interrupt,
			_periodic
	)

Value:

hw_metadata _name;                          \
    _name.timer = (hw_timer_metadata) {                 \
        .base      = (memory_address_t) _base,              \
        .frequency = (uint32_t)  _frequency,                \
        .interrupt = (uint32_t)  _interrupt,                \
        .periodic  = (uint32_t)  _periodic              \
    }

Create a struct named _name.

Definition at line 11 of file timer.h.

Function Documentation

void timer_add_interrupt

(

hw_metadata

metadata

)

Schedule a task (function) to be invoked periodically.

Parameters

Metadata

regarding the timer peripheral and isr to use.

Definition at line 18 of file timer.c.

References hw_timer_metadata::base, hw_timer_metadata::frequency, IntEnable(), hw_timer_metadata::interrupt, hw_timer_metadata::periodic, SysCtlClockGet(), hw_metadata::timer, TIMER_A, TIMER_DEFAULT_PRIORITY, TIMER_TIMA_TIMEOUT, TimerConfigure(), TimerEnable(), TimerIntEnable(), and TimerLoadSet().

Referenced by hw_channel_init().

                                               {

    TimerConfigure(metadata.timer.base, metadata.timer.periodic);
    TimerLoadSet(metadata.timer.base, TIMER_A, SysCtlClockGet() / metadata.timer.frequency);
    TimerIntEnable(metadata.timer.base, TIMER_TIMA_TIMEOUT);
    IntEnable(metadata.timer.interrupt, TIMER_DEFAULT_PRIORITY);
    TimerEnable(metadata.timer.base, TIMER_A);
}

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