timer_example2.c File Reference

#include "timer.h"

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Defines
#define	CLEAR   2
#define	EACH_EDGE   3
#define	FALLING_EDGE   2
#define	FALSE   0
#define	NONE   0
#define	NOOP   0
#define	RISING_EDGE   1
#define	SET   1
#define	TOGGLE   3
#define	TRUE   1
Functions
void	init_timer_input (unsigned int instance, unsigned int channel)
void	init_timer_output (unsigned int instance, unsigned int channel)
int	main (int argc, char *argv[])

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Define Documentation

#define CLEAR   2

Definition at line 21 of file timer_example2.c.

#define EACH_EDGE   3

Definition at line 27 of file timer_example2.c.

#define FALLING_EDGE   2

Definition at line 26 of file timer_example2.c.

Referenced by init_timer_input().

#define FALSE   0

Definition at line 32 of file timer_example2.c.

#define NONE   0

Definition at line 24 of file timer_example2.c.

Referenced by init_timer_input().

#define NOOP   0

Definition at line 19 of file timer_example2.c.

#define RISING_EDGE   1

Definition at line 25 of file timer_example2.c.

#define SET   1

Definition at line 20 of file timer_example2.c.

#define TOGGLE   3

Definition at line 22 of file timer_example2.c.

#define TRUE   1

Definition at line 31 of file timer_example2.c.

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Function Documentation

void init_timer_input	(	unsigned int	instance,
		unsigned int	channel
	)

Definition at line 82 of file timer_example2.c.

References timer_capture_opt_t::abetrg, timer_capture_opt_t::burst, timer_capture_opt_t::channel, timer_capture_opt_t::clki, timer_capture_opt_t::cpctrg, timer_capture_opt_t::etrgedg, FALLING_EDGE, FALSE, timer_capture_opt_t::ldbdis, timer_capture_opt_t::ldbstop, timer_capture_opt_t::ldra, timer_capture_opt_t::ldrb, NONE, timer_capture_opt_t::tcclks, TIMER_CLOCK_SOURCE_TC5, timer_init_capture(), and TRUE.

Referenced by main().

{
        struct timer_capture_opt_t capture_opt;

        /* Options for Capture mode */
        capture_opt.channel = channel;
        capture_opt.tcclks = TIMER_CLOCK_SOURCE_TC5;
        capture_opt.clki = FALSE;
        capture_opt.burst = FALSE;
        capture_opt.ldbstop = FALSE;
        capture_opt.ldbdis = FALSE;
        capture_opt.etrgedg = FALLING_EDGE;
        capture_opt.abetrg = FALSE; /* Select TIOB */
        capture_opt.cpctrg = TRUE;
        capture_opt.ldra = FALLING_EDGE;
        capture_opt.ldrb = NONE;

        /*Initialize the timer*/
        timer_init_capture(instance, &capture_opt);
}

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void init_timer_output	(	unsigned int	instance,
		unsigned int	channel
	)

Definition at line 104 of file timer_example2.c.

References timer_waveform_opt_t::acpa, timer_waveform_opt_t::acpc, timer_waveform_opt_t::aeevt, timer_waveform_opt_t::aswtrg, timer_waveform_opt_t::bcpb, timer_waveform_opt_t::bcpc, timer_waveform_opt_t::beevt, timer_waveform_opt_t::bswtrg, timer_waveform_opt_t::burst, timer_waveform_opt_t::channel, CLEAR, timer_waveform_opt_t::clki, timer_waveform_opt_t::cpcdis, timer_waveform_opt_t::cpcstop, timer_waveform_opt_t::eevt, timer_waveform_opt_t::eevtedg, timer_waveform_opt_t::enetrg, FALSE, NOOP, SET, timer_waveform_opt_t::tcclks, TIMER_CLOCK_SOURCE_TC4, timer_init_waveform(), TIMER_WAVEFORM_SEL_UP_MODE, and timer_waveform_opt_t::wavsel.

Referenced by main().

{
        struct timer_waveform_opt_t waveform_opt;

        /* Options for Waveform genration */
        waveform_opt.channel = channel;
        waveform_opt.tcclks = TIMER_CLOCK_SOURCE_TC4;
        waveform_opt.clki = FALSE;
        waveform_opt.burst = FALSE;
        waveform_opt.cpcstop = FALSE;
        waveform_opt.cpcdis = FALSE;
        waveform_opt.eevtedg = FALSE;
        waveform_opt.eevt = 0;
        waveform_opt.enetrg = FALSE;
        waveform_opt.wavsel = TIMER_WAVEFORM_SEL_UP_MODE;

        waveform_opt.acpa = CLEAR;
        waveform_opt.acpc = SET;
        waveform_opt.aeevt = NOOP;
        waveform_opt.aswtrg = NOOP;

        waveform_opt.bcpb = NOOP;
        waveform_opt.bcpc = NOOP;
        waveform_opt.beevt = NOOP;
        waveform_opt.bswtrg = NOOP;

        /* Initialize the timer */
        timer_init_waveform(instance, &waveform_opt);
}

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int main	(	int	argc,
		char *	argv[]
	)

Definition at line 39 of file timer_example2.c.

References init_timer_input(), init_timer_output(), timer_read_ra(), timer_start(), and timer_write_ra().

{

        avr32_pio_t *piob = (void *) AVR32_PIOB_ADDRESS;


        /* The channel number and instance is used in several functions */
        /* It's defined as local variable for ease-of-use and readability */
        int output_instance = 1;
        int output_channel = 1;

        int input_instance = 2;
        int input_channel = 0;

        /* Used for reading the RA value for the input Timer/Counter instance */
        int ra=0;

        /* Enable Timer module on PIOB */
        piob->pdr = 0x0000ffff;
        piob->asr = 0x0000ffff;

        /* Init the Timer */
        init_timer_input(input_instance, input_channel);
        init_timer_output(output_instance, output_channel);

        /* Set the compare triggers*/
        timer_write_ra(output_instance, output_channel, 0x2000 );

        /* Start the timers */
        timer_start(output_instance, output_channel);
        timer_start(input_instance, input_channel);

        while(1){
                ra = timer_read_ra(input_instance, input_channel);
                if(ra>0){
                        timer_write_ra(output_instance, output_channel, ra);
                        ra=0;
                }
        }
        return 0;
}

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