new.c

DSP的PWM波形程序,可用与TI公司的2407等DSP,用于电机控制

#include <math.h>
#include<stdio.h>
#define Pi 3.1415926
int s=0,u[16384];

void main()
{
	FILE *fp;
	int i=-1,j=-1,z=0;
	unsigned long int t;
	unsigned int ts,t1;
	int n1,nd,a1=0,a2=0;
	float Uc,Ucm=5,Ug,Ugm;
	t1=41;
	scanf("%d",&nd);
	Ugm=((0.53-0.438)/31*nd+0.438)*5;
	fp=fopen("D:\\tc\\spwm\\z3.txt","w+");
	for(t=0;t<=16383;t=t+1)
	{
		Ug=Ugm*sin(2*Pi*t/16383);
		n1=floor(t/164);
		ts=t-164*n1;
		if(ts<t1)
		Uc=-Ucm*ts/t1;
		if(t1<=ts&&ts<=3*t1)
		Uc=Ucm*(ts-t1)/t1-5;
		else
		Uc=Ucm*(4*t1-ts)/t1;
		if(Uc<=Ug)
		{
			u[s]=6;
			j=i;   
			i=-1;  
			a2+=1; 			
		}
		else
		{
		        u[s]=9;	
			j=i;   
			i=1;   
			a1+=1; 
		}
		if(z==1)
		{
			u[s]=0x0000;
			z=0;
		}
		if(i*j<0)
		{
			u[s]=0x0000;
			u[s-2]=0x0000;
			u[s-1]=0x0000;
			z=1;
		}
		s=s+1;
	}
		printf("%d\n",a1);
		printf("%d\n",a2);
		s=0;
		for(s=0;s<=16384;s++)
		{
			fprintf(fp,"%u",u[s]);
		}
		fclose(fp);
}