tsblink.c

ADI公司ADSP-TS101S的FLAG信号控制编程

//*********************************************************
//
//  tsblink.c : Simple example of flag toggling on the 
//              TigerSharc to blink LEDs.  The processor
//              LEDs blink as follows:
//              PROC    RATE
//              P0      1Hz
//              P1      2Hz
//              P2      4Hz
//              P3      8Hz
//
//  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
//
//    Ver.  Dates     Author  Changes                                
//    ----  --------  ------  -----------------------------
//    1.0   11/29/01  rpc     Creation
//*********************************************************

#include <defts101.h>
#include <sysreg.h>
#include <signal.h>
#include "utils.h"
/**********************************************************/

#define USE_INTERRUPT  1  // Set to 1 to use the timer interrupt

int count, cnt;
int mpid;
volatile int intr_count = 0;

/**********************************************************/
/*                                                        */
/*                                                        */
/*                                                        */
/**********************************************************/
void timer0_handler(int sig)
{
    toggle_leds(FLG2|FLG3);
    intr_count++;
}


/**********************************************************/
/*                                                        */
/*                                                        */
/*                                                        */
/**********************************************************/
void main ( void )
{
    int tmr_val;

	// Set up SYSCON and SDRAM
    init_Tiger(); 

    // Initialize flags
    prep_leds();

    mpid = GetIDC();

#if USE_INTERRUPT
	// Set up timer interrupts
	interrupt(SIGTIMER0LP, timer0_handler);     // attach handler for timer0 interrupt
	tmr_val = 240000000 >> mpid;                // timer value dependent upon processor
    init_timer(0, 0, tmr_val);
    start_timer(0);
#endif

	// Toggle flags to blink LEDs
	while(1)
	{
		count++;
//		count++;
//		count++;
//		count++;

//#if !USE_INTERRUPT

//		for (cnt = 0 ; cnt < 24000000 ; cnt++);   // delay

//		if(count % 2)
	        __builtin_sysreg_write(__SQCTLST, (FLG2|FLG3)); // set the flag bits
//		else
//	        __builtin_sysreg_write(__SQCTLCL, ~(FLG2|FLG3)); //clear the flag bits
//#endif
	}	
}

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

/* End of file tsblink.c */

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