mix.c

c5x中关于C编程的实验

//******************************************************************************
//               		SJTU DSP Tech. Center
//        Copyright (c) 2001 SJTU DSP Tech. Center. All Rights Reserved.
//
//  Description:
//  		TMS320C54x Program for Students Experiment
//
//  History:
//		Date		Authors			
//		2003/07/23	Zheng Yigang	
//******************************************************************************
#include <stdio.h>

#define		PRD0     0x0025
#define 	TCR0     0x0026 	
#define     PMST     0x001d  
#define 	SWWSR    0x0028
#define 	IFR      0x0001
#define 	IMR		 0x0000
#define 	ST1		 0x0007	

int i_var1,i_var2=0;
short s_var;
char c_var;
long l_var;
int *lp_var;
ioport unsigned port0;

int func_c(int var1, int var2)
{
	int sum;

	sum = var1 + var2;
		
	return sum;
}

interrupt void Timer0_ISR()
{
	i_var2++;
	c_var = 1;
	
	if(i_var2==10)
	{
		port0 = port0 ^ 1;
		i_var2=0;
	}
}

void main()
{	
	//register setting	
	asm("	ssbx	INTM");
//	*(int *)ST1 = 0x6900;
	asm("	stm		#0x7fff, SWWSR");
	asm("	stm		#0x00A0, PMST");

	//set timer0
	*(int *)IMR = 0x0008;
	*(int *)IFR = 0xffff;
	*(int *)TCR0 = 0x001f;		//set time control register,and stop the timer
	*(int *)PRD0 = 0x8000;         // set time interrupt calling period   
	
	asm("	rsbx    INTM ");
	*(int *)TCR0 = 0x002f;		//start timer
	
	c_var = 0;
	do 
	{
		if(c_var == 1)
		{
			c_var =0;
			
			s_var = 1;
			i_var1 = 2;
			s_var = func_c(s_var, i_var1);
			printf("s_var = %d\n", s_var);
		}
		
	}while(1);
	
	return;
}