单片机源程序如下:

#include

#include

#define uchar unsigned char

#define uint unsigned int

sbit RS=P3^0;

sbit RW=P3^1;

sbit EN=P3^3;

sbit K1=P2^0;

sbit K2=P2^1;

sbit K3=P2^2;

sbit K4=P2^3;

sbit K5=P2^4;

uchar WaveChoice=1;

uchar ys=30;

uchar i,a=0;

uchar sqar_num=128;

uint freq;

uchar code Sin[]={"Sine "};

uchar code Squ[]={"Square "} ;

uchar code Tri[]={"Triangle "};

uchar code Saw[]={"Sawtooth "} ;

uchar code No[]={"No Signal out "};

uchar code Wave[]={"Wave :"};

uchar code Fre[]={"Freq :"};

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 DelayMS(uchar ms)

{

uchar i;

while(ms--) for(i=0;i<120;i++);

}

void Delay1(uint y)

{

uint i;

for(i=y;i>0;i--);

}

uchar Busy_Check()

{

uchar LCD_Status;

RS=0; // 寄存器选择

RW=1; //读状态寄存器

EN=1; // 开始读

DelayMS(1);

LCD_Status=P1;

EN=0;

return LCD_Status;

}

void Write_LCD_Command(uchar cmd)

{

while((Busy_Check()&0x80)==0x80); //忙等待

RS=0; //选择命令寄存器

RW=0; //写

EN=0;

P1=cmd;EN=1;DelayMS(1);EN=0;

}

void Write_LCD_Data(uchar dat)

{

while((Busy_Check()&0x80)==0x80); //忙等待

RS=1; RW=0; EN=0; P1=dat;EN=1;DelayMS(1);EN=0;

}

void Init_LCD()

{

Write_LCD_Command(0x38);

DelayMS(1);

Write_LCD_Command(0x01); //清屏

DelayMS(1);

Write_LCD_Command(0x06); //字符进入模式：屏幕不动，字符后移

DelayMS(1);

Write_LCD_Command(0x0C); //显示开、关光标

DelayMS(1);

}

void Write_freq(uint k)

{

uchar qian,bai,shi,ge;

qian=k/1000;

bai=k/100%10;

shi=k/10%10;

ge=k%10;

Write_LCD_Command(0x86+0x40);

Write_LCD_Data(0x30+qian);

Write_LCD_Data(0x30+bai);

Write_LCD_Data(0x30+shi);

Write_LCD_Data(0x30+ge);

Write_LCD_Data(0x48);

Write_LCD_Data(0x5a);

}

void Xianshi_f()

{

if(WaveChoice==1)

{

freq=(10000000/(50000+2860*ys));

Write_freq(freq);

}

if(WaveChoice==2)

{

freq=(10000000/(50000+2300*ys));

Write_freq(freq);

}

if(WaveChoice==3)

{

freq=(10000000/(14000+2300*ys));

Write_freq(freq);

}

if(WaveChoice==4)

{

freq=(10000000/(15000+2300*ys));

Write_freq(freq);

}

}

void Write_wave(uchar t )

{

switch(t)

{

case 0:

Write_LCD_Command(0x86);

DelayMS(5);

for (i=0;i

{

Write_LCD_Data(No[i]);

DelayMS(5);

}

break;

case 1:

ys=25;

Write_LCD_Command(0x86);

DelayMS(5);

for (i=0;i

{

Write_LCD_Data(Sin[i]);

DelayMS(5);

}

break;

case 2:

ys=30;

Write_LCD_Command(0x86);

DelayMS(5);

for (i=0;i

{

Write_LCD_Data(Squ[i]);

DelayMS(5);

}

break;

case 3:

ys=30;

Write_LCD_Command(0x86);

DelayMS(5);

for (i=0;i

{