wdog.c

ADI公司ADSP-TS101S的看门狗电路控制程序

//*********************************************************
//
//  wdog.c : Test of watchgdog timer.
//
//  PROVIDED BY:
//  ------------
//  Bittware, Inc.
//  33 North Main Street
//  Concord, NH  03301
//  Ph: 603-226-0404
//  Fax: [phone]
//  WWW: www.bittware.com
//  E-mail: [e-mail]
//
//  Copyright (c) 2001
//
//  The user is hereby granted a non-exclusive license to use and or 
//  modify this software provided that it runs on BittWare hardware.  
//  Usage of this software on non-BittWare hardware without the express 
//  written permission of BittWare is strictly prohibited.
//    Ver.  Dates     Author  Changes                                
//    ----  --------  ------  -----------------------------
//    1.0   11/29/01  rpc     Creation
//*********************************************************

#include <defts101.h>
#include <sysreg.h>
#include <signal.h>
#include "utils.h"
#include "tfin.h"

#define CLKS_PER_MS (unsigned int) 240000

// Set timeout to test particular timeout region 
// timeout=0 for for ~150 ms timeout  
// timeout=1 for for ~600 ms timeout  
// timeout=2 for for ~1200 ms timeout  

// Globals
volatile unsigned int timeout = 2;
volatile int step;
volatile int interval;
volatile int intr_count = 0;
int count;

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/*                                                        */
/*                                                        */
/*                                                        */
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void timer0_handler(int sig)
{
    toggle_flags(FLG0 | FLG1);
    toggle_leds(FLG2);
    intr_count++;
    interval += step;
    init_timer(0,0, interval*CLKS_PER_MS);
}


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/*                                                        */
/*                                                        */
/*                                                        */
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void main (void)
{
    int my_pid;
    int flag_ena;
    int *wdog_reg;

	// Init
    init_Tiger(); 
    my_pid = GetIDC();
    wdog_reg = (int *)(MSH + TFIN_RST_CTL_REG);

    flag_ena = (my_pid == 0) ? B_T0F1_ENA :
               (my_pid == 1) ? B_T1F1_ENA :
               (my_pid == 2) ? B_T2F1_ENA : B_T3F1_ENA;

    switch (timeout) 
    {
        case 0:
        default:
            interval = 50;
            step = 1;
            *wdog_reg = WDOG_SHORT_TO | flag_ena; /* 150 ms (typical) timeout */
        break;

        case 1:
            interval = 200;
            step = 5;
            *wdog_reg = WDOG_MED_TO | flag_ena; /* 600 ms (typical) timeout */
        break;

        case 2:
            interval = 400;
            step = 20;
            *wdog_reg = WDOG_LONG_TO | flag_ena; /* 1200 ms (typical) timeout */
        break;
    }    

    // Initialize flags
    set_flags_as_output(FLG0O | FLG1O);  // set FLG1 as output
    prep_leds();  // set FLG2 as output

	// Set up timer interrupts
	interrupt(SIGTIMER0LP, timer0_handler); // attach handler for timer0 interrupt
    init_timer(0, 0, interval*CLKS_PER_MS);
    start_timer(0);

	while(1)
	{
		count++;
	}	
}

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

/* End of file wdog.c */

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