这是运用AT89S52单片机及DAC0832结合控制波形输出，按键控制何种波形的输出，用示波器显示波形，LCD显示频率及波形名称。由于我是新手，所以在按键控制显示时，不太稳定。（希望能够加入论坛，得到各位大虾的帮助）
#include<reg52.h>
#include<math.h>
#include<ABSACC.H>
#define uchar unsigned char
#define uint unsigned int
#define DA_0832 XBYTE[0XFFFE]
sbit lcdrs=P2^0;
sbit lcdwr=P2^1;
sbit lcde=P2^2;
sbit d=P3^7;
sbit s0=P3^0;
sbit s1=P3^1;
sbit s2=P3^2;
sbit s3=P3^3;
long int ys,k,x;
uint i,j;
uint c,a;
uint fre;
uint num;
uchar s1num=0,s3num;
uchar ge,shi,bai,qian;
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};//正弦波码
void delay(uint z)
{
uchar i,j;
for(i=z;i>0;i--)
for(j=248;j>0;j--);
}
void delay1(uint y)
{
for(k=y;k>0;k--)
for(x=10;x>0;x--);
}
void write_com(uchar com)
{
delay(1);
lcdrs=0;
delay(1);
lcdwr=0;
P1=com;
lcde=1;
delay(1);
lcde=0;
}
void write_data(uchar date)
{
delay(1);
lcdrs=1;
delay(1);
lcdwr=0;
P1=date,
lcde=1;
delay(1);
lcde=0;
}
void write_f(uint date)//显示频率
{
qian=date/1000;
bai=date%1000/100;
shi=date%1000%100/10;
ge=date%1000%100%10;
write_com(0x80+0x42);//第4格开始显示
write_data(0x30+qian);
write_data(0x30+bai);
write_data(0x30+shi);
write_data(0x30+ge);
}
void xsf()//频率的计算
{
if(s1num==1)
{
fre=(1000/(9+3*ys));
write_f(fre);
}
if(s1num==2)
{
fre=1/(0.5*10*ys*20)*1000000;
write_f(fre);
}
if(s1num==3)
{
fre=(1000/(15+3*ys));
write_f(fre);
}
}
void keyscan()
{
d=0;
if(s0==0)
{
delay(2);
while(!s0);
delay(2);
//if(!s0)
{
s1num++;
P0=s1num;
write_com(0x80+0x4a);
write_data(0x30+s1num);
if(s1num==1)//按键按一下为正弦波
{
ys=0;
write_com(0x80+0x05);
write_data(0x73);//显示s
write_data(0x69);//显示i
write_data(0x6e);//显示n
write_data(0x65);//显示e
write_data(0x20);//显示空格
write_data(0x20);//显示空格
}
//delay(2);
if(s1num==2)//按两下为方波
{
ys=10;
write_com(0x80+0x05);
delay(10);
write_data(0x73);//显示s
write_data(0x71);//显示q
write_data(0x75);//显示u
write_data(0x61);//显示a
write_data(0x72);//显示r
write_data(0x65);//显示e
}
//delay(2);
if(s1num==3)//安三下为锯齿波
{
ys=0;
write_com(0x80+0x05);
delay(10);
write_data(0x74);//显示t
write_data(0x72);//显示r
write_data(0x61);//显示a
write_data(0x69);//显示i
write_data(0x6e);//显示n
write_data(0x20);
}
//delay(2);
if(s1num>=4)//按四下为空
{
s1num=0;
P1=0;
write_com(0x80+0x05);
write_data(0x20);
write_data(0x20);
write_data(0x20);
write_data(0x20);
write_data(0x20);
write_data(0x20);
write_com(0x80+0x42);
write_data(0x20);
write_data(0x20);
write_data(0x20);
write_data(0x20);
}
}
}
if(s3==0)
{
delay(5);
while(!s3);
delay(5);
s3num++;
if(s3num==1)
{
write_com(0x80+0x46);
delay(5);
write_data(0x4d);
}
if(s3num==2)
{
write_com(0x80+0x46);
delay(5);
write_data(0x20);
}
if(s3num==3)
{
s3num=0;
write_com(0x80+0x46);
delay(5);
write_data(0x4b);
}
}
if(s1==0)//调节频率
{
delay(5);
if(s1==0)
{
delay(5);
while(!s1);
ys++;//频率加
}
}
if(s2==0)//频率减
{
delay(5);
if(s2==0)
{
delay(5);
while(!s2);
ys--;
}
}
}
void init()
{
lcdwr=0;
lcde=0;
write_com(0x38);
write_com(0x0c);
write_com(0x06);
write_com(0x01);
write_com(0x80+0x00);
delay(10);
write_data(0x77);//写wave
write_data(0x61);
write_data(0x76);
write_data(0x65);
write_data(0x3a);
write_com(0x80+0x40);
delay(10);
write_data(0x66);//写f
write_data(0x3a);
write_com(0x80+0x40+0x06);
write_data(0x4b);//对应字母K
write_data(0x48);//对应字母H
write_data(0x5a);//对应字母Z
}
void main()
{
c=0;
init();
P0=0;
while(1)
{
keyscan();
if(s1num==1)//正弦波
{
for(c=0;c<255;c++)
{
DA_0832=tosin[c];
}
}
if(s1num==2)//产生方波
{
DA_0832=0xff;
delay(1);
DA_0832=0x00;
delay(1);
}
if(s1num==3)
{
if(c<128)//产生三角波
{
DA_0832=c;
delay1(ys);
}
if((128<=c)&(c<255))
{
DA_0832=255-c;
delay1(ys);
}
if(c>=255)
{c=0;}
c++;
}
if(s1num>=4)
{
s1num=0;
}
if(!(s0&s1&s2))
{
xsf();
}
}
} |
发表于 2011-7-9 15:35:02
楼主