Renesas M3T-ICC740 Technical Information PDF herunterladen (Seite 17)

Source program tutor3.c

/*-----------------------------------------------------

* File: tutor3.c

* Purpose: Handling real time interrupts

* Usage: ICC -r -L -q tutor3.c

* XLINK -r -f <link file> tutor3

* Description: Using BRK vector to print a character

* $Id: tutor3.c 1.3 1998/01/15 09:24:55Z Laban Exp $

*-----------------------------------------------------*/

#pragma language=extended /* enable use of extended keywords */

#include <stdlib.h>

#include <stdio.h>

#include "intr740.h" /* include intrinsics */

/**********************************

* Variables *

**********************************/

char my_char = '*';

int call_count = 0;

/**********************************

* Start of code *

**********************************/

void interrupt [0x00] brk_interrupt(void)

{

// putchar('I');

my_char='.';

}

void execute_brk(void)

{

break_instruction(); /* Use intrinsic function */

}

void do_foreground_process(void)

{

call_count++;

// putchar(my_char);

my_char = rand() % 26 + 'a';

}

void main(void)

{

while (1)

{

do_foreground_process();

if (my_char=='i') execute_brk();

}

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