xing2.c

单片机89s51做的波形发生器

#include<reg51.h> 

#define uchar unsigned char 

#define uint unsigned int 

sbit LCP=P2^2; 

sbit SCP=P2^1; 

sbit SI=P2^0; 

sbit S1=P2^3; 

sbit S2=P2^4; 

sbit S3=P2^5; 

sbit S4=P2^6; 

sbit S5=P2^7; 

sbit DA0832=P3^3; 

sbit DA0832_ON=P3^2; 

uchar fun=0,b=0,c=0,d=0,tl,th; 

uchar code tab[10]={0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f}; 

uchar code tosin[256]={0x80,0x83,0x86,0x89,0x8d,0x90,0x93,0x96,0x99,0x9c,0x9f,0xa2,0xa5,0xa8,0xab,0xae,0xb1,0xb4,0xb7,0xba,0xbc,0xbf,0xc2,0xc5 

,0xc7,0xca,0xcc,0xcf,0xd1,0xd4,0xd6,0xd8,0xda,0xdd,0xdf,0xe1,0xe3,0xe5,0xe7,0xe9,0xea,0xec,0xee,0xef,0xf1,0xf2,0xf4,0xf5 

,0xf6,0xf7,0xf8,0xf9,0xfa,0xfb,0xfc,0xfd,0xfd,0xfe,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xfe,0xfd 

,0xfd,0xfc,0xfb,0xfa,0xf9,0xf8,0xf7,0xf6,0xf5,0xf4,0xf2,0xf1,0xef,0xee,0xec,0xea,0xe9,0xe7,0xe5,0xe3,0xe1,0xde,0xdd,0xda 

,0xd8,0xd6,0xd4,0xd1,0xcf,0xcc,0xca,0xc7,0xc5,0xc2,0xbf,0xbc,0xba,0xb7,0xb4,0xb1,0xae,0xab,0xa8,0xa5,0xa2,0x9f,0x9c,0x99 

,0x96,0x93,0x90,0x8d,0x89,0x86,0x83,0x80,0x80,0x7c,0x79,0x76,0x72,0x6f,0x6c,0x69,0x66,0x63,0x60,0x5d,0x5a,0x57,0x55,0x51 

,0x4e,0x4c,0x48,0x45,0x43,0x40,0x3d,0x3a,0x38,0x35,0x33,0x30,0x2e,0x2b,0x29,0x27,0x25,0x22,0x20,0x1e,0x1c,0x1a,0x18,0x16 

,0x15,0x13,0x11,0x10,0x0e,0x0d,0x0b,0x0a,0x09,0x08,0x07,0x06,0x05,0x04,0x03,0x02,0x02,0x01,0x00,0x00,0x00,0x00,0x00,0x00 

,0x00,0x00,0x00,0x00,0x00,0x00,0x01,0x02 ,0x02,0x03,0x04,0x05,0x06,0x07,0x08,0x09,0x0a,0x0b,0x0d,0x0e,0x10,0x11,0x13,0x15 

,0x16,0x18,0x1a,0x1c,0x1e,0x20,0x22,0x25,0x27,0x29,0x2b,0x2e,0x30,0x33,0x35,0x38,0x3a,0x3d,0x40,0x43,0x45,0x48,0x4c,0x4e 

,0x51,0x55,0x57,0x5a,0x5d,0x60,0x63,0x66 ,0x69,0x6c,0x6f,0x72,0x76,0x79,0x7c,0x80 }; 

void display(unsigned char command) 

{ 

	unsigned char i; 
	
	LCP=0; 
	
	for(i=8;i>0;i--) 
	
	{ 
	
		SCP=0; 
		
		if((command & 0x80)==0) 
		
		{ 
		
			SI=0; 
		
		} 
		
		else 
		
		{ 
		
			SI=1; 
		
		} 
		
		command<<=1; 
		
		SCP=1; 

	} 

	LCP=1; 

} 

void key1(void) 

{ 

	fun++; 
	
	if(fun==4) 
	
	fun=0x00; 

} 

void key2(void) 

{ 

	tl++; 
	
	if(tl==0x1f) 
	
	th++; 

} 

void key3(void) 

{ 

	tl--; 
	
	if(tl==0x00) 
	
	th--; 

} 

void key4(void) 

{ 

	double t; 
	
	int f; 
	
	TR0=0; 
	
	t=(65535-th*256-tl);//*0.4; 
	
	f=(int)(1000/t); 
	
	S3=tab[f%10]; 
	
	f=f/10; 
	
	S2=tab[f%10]; 
	
	f=f/10; 
	
	if(f==0) 
	
	S1=0; 
	
	else 
	
	S1=tab[f]; 
	
	TR0=1; 

} 

void key5(void) 

{ 

	tl--; 
	
	if(tl==0x00) 
	
	th++; 

} 

void judge(void) 

{ 

	uchar line,row,de1,de2,keym; 
	
	P1=0x0f; 
	
	keym=P1; 
	
	if(keym==0x0f)return; 
	
	for(de1=0;de1<200;de1++) 
	
	for(de2=0;de2<125;de2++){;} 
	
	P1=0x0f; 
	
	keym=P1; 
	
	if(keym==0x0f)return; 
	
	P1=0x0f; 
	
	line=P1; 
	
	P1=0xf0; 
	
	row=P1; 
	
	line=line+row; /*存放特征键值*/ 
	
	if(line==0xde)key1(); 
	
	if(line==0x7e)key2(); 
	
	if(line==0xbd)key3(); 
	
	if(line==0x7d)key4(); 

} 

void time0_int(void) interrupt 1 //中断服务程序 

{ 

	TR0=0; 
	
	if(fun==1) 
	
	{ 
	
		DA0832=tosin[b]; //正弦波 
		
		b++; 
		
	} 
	
	else if(fun==2) //锯齿波 
	
	{ 
	
		if(c<128) 
		
		DA0832=c; 
	
		else 
		
		DA0832=255-c; 
		
		c++; 
	
	} 
	
	else if(fun==3) // 方波 
	
	{ 
	
		d++; 
		
		if(d<=128) 
		
		DA0832=0x00; 
		
		else 
		
		DA0832=0xff; 

	} 

	TH0=th; 
	
	TL0=tl; 
	
	TR0=1; 

} 

void main(void) 

{ 

	TMOD=0X01; 
	
	TR0=1; 
	
	th=0xff; 
	
	tl=0xd0; 
	
	TH0=th; 
	
	TL0=tl; 
	
	ET0=1; 
	
	EA=1; 
	
	while(1) 
	
	{ 
	
		display(0xfe); 
		
		judge(); 
	
	} 

}