blink.c

Tigersharc ts101 芯片

//*********************************************************
//
//  tsblink.c : Simple example of flag toggling on the 
//              TigerSharc to blink LEDs
//
//  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 <stdio.h>
/**********************************************************/

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

/**********************************************************/
#define FLG0O    0x00100000 // Make FLG0 output
#define FLG1O    0x00200000 // Make FLG1 output
#define FLG2O    0x00400000 // Make FLG2 output
#define FLG3O    0x00800000 // Make FLG3 output
#define FLG0     0x01000000 // Bit for FLG0 
#define FLG1     0x02000000 // Bit for FLG1 
#define FLG2     0x04000000 // Bit for FLG2 
#define FLG3     0x08000000 // Bit for FLG3 
#define TMR0RN   0x00001000 // Bit to enable timer 0
#define TMR1RN   0x00002000 // Bit to enable timer 1
/**********************************************************/

int count, cnt;
volatile int intr_count = 0;

/**********************************************************/
/*                                                        */
/*                                                        */
/*                                                        */
/**********************************************************/
void timer0_handler(int sig)
{
	if(intr_count % 2)
        __builtin_sysreg_write(__SQCTLST, (FLG2|FLG3)); // set the flag bits
	else
        __builtin_sysreg_write(__SQCTLCL, ~(FLG2|FLG3)); //clear the flag bits
    intr_count++;
    
    printf("1111122321\n");
}


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

	//__builtin_sysreg_write(IVSW, 0xFFFB);
	// Set up SYSCON and SDRAM
	//__builtin_sysreg_write(__SYSCON,0x003a3041);	// or 0x3a3027
	//__builtin_sysreg_write(__SDRCON,0x00003003);	// SDRAM enabled, CAS LATENCY = two, Pipe Depth = 0, Page Boundry = 256,
 
    // Initialize flags and get Processor ID
	__builtin_sysreg_write(__SQCTLST, (FLG2O | FLG3O));	// make flags 2 and 3 outputs

#if USE_INTERRUPT
	// Set up timer interrupts
	interrupt(SIGTIMER0LP, timer0_handler);     // attach handler for timer0 interrupt
	tmr_val = 0x1000000*3;               // timer value based on proc ID
	__builtin_sysreg_write(__TMRIN0L, tmr_val);	// set timer0 low count
	__builtin_sysreg_write(__TMRIN0H, 0);	    // set timer0 high count
	__builtin_sysreg_write(__SQCTLST, TMR0RN);	// start timer0
#endif

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

#if !USE_INTERRUPT

		for (cnt = 0 ; cnt < 2500000 ; 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 */

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