#include<reg51.h>
#define uchar unsigned char
#define uint unsigned int
sbit csda=P2^2;
sbit wr=P2^1;
sbit s1=P3^2;
sbit s2=P3^3;
sbit led1=P1^0;
sbit led2=P1^1;
sbit led3=P1^2;
uchar timeCnt=0;
uchar k=0,p=0,delay=0;
uchar bxxz=0;pinglv=0;
uchar a=1,b=0,c=0,d=0;
//正弦波數據
uchar code zhengxian[64]={
135,145,158,167,176,188,199,209,218,226,234,240,245,249,252,254,254,253,251,247,243,237,230,222,213,204,193,182,170,158,
146,133,121,108,96,84,72,61,50,41,32,24,17,11,7,3,1,0,0,2,5,9,14,20,28,36,45,55,66,78,90,102,114,128
};
//方波數據報表
uchar code juxing[64]={
255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,
255,255,255,255,255,255,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0
};
//鋸齒波數據
uchar code juchi[64]={
0,4,8,12,16,20,24,28,32,36,40,45,49,53,57,61,65,69,73,77,81,85,89,93,97,101,105,109,113,117,121,125,130,134,138,142,
146,150,154,158,162,166,170,174,178,182,186,190,194,198,202,206,210,215,219,223,227,231,235,239,243,247,251,255
};
//三角波數據
uchar code sanjiao[64]={
0,8,16,24,32,40,48,56,64,72,80,88,96,104,112,120,128,136,144,152,160,168,176,184,192,200,208,216,224,232,240,248,
248,240,232,224,216,208,200,192,184,176,168,160,152,144,136,128,120,112,104,96,88,80,72,64,56,48,40,32,24,16,8,0
};
void delay1() //延時
{
int a,b;
for(a=1;a>0;a--)
for(b=122;b>0;b--);
}
void int0() interrupt 0 //中斷處理，用于波型切換
{
EX0=0;
delay1();
if(s1==0)
{
bxxz++;
if(bxxz==4)
bxxz=0;
switch(bxxz)
{
case 0 :
{a=1,b=0,c=0,d=0;} // 正弦波
break;
case 1 :
{a=0,b=1,c=0,d=0;} //方波
break;
case 2 :
{a=0,b=0,c=1,d=0;} // 鋸齒波
break;
case 3 :
{a=0,b=0,c=0,d=1;} // 三角波
break;
}
delay1();
while(!s1);
}
while(!s1);
EX0=1;
}
void int1() interrupt 2
{
EX1=0;
delay1();
if(s2==0){
p++;
if(p==5)
p=0;
switch(p)
{
case 1 :
pinglv=63; //50Hz
break;
case 2 :
pinglv=21; //100Hz
break;
case 3 :
pinglv=3; //500Hz
break;
case 4 :
pinglv=0; //1000Hz
break;
default :
pinglv=150; //2000Hz
break;
}
delay1();
while(!s2);
}
while(!s2);
EX1=1;
}
void main()
{
csda=0;
wr=0;
EA=1;
IT0=1;
EX0=1;
IT1=1;
EX1=1;
pinglv=15;
while(1)
{
while(a) //產生正弦波
{
delay=pinglv; //獲取周期數據
P0=zhengxian[k]; //數據數P0口進行波形轉換
k++;
if(k==64) //一個周期取64點波數據
k=0;
while(delay) //延時處理
delay--;
}
while(b) //產生方波
{
delay=pinglv;
P0=juxing[k];
k++;
if(k==64)
k=0;
while(delay)
delay--;
}
while(c) //產生鋸齒波
{
delay=pinglv;
P0=juchi[k];
k++;
if(k==64)
k=0;
while(delay)
delay--;
}
while(d) //產生三角波
{
delay=pinglv;
P0=sanjiao[k];
k++;
if(k==64)
k=0;
while(delay)
delay--;
}
}
}
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