#include <reg52.h>
#include<intrins.h> // _nop_() 函数延时1US用
#define uchar unsigned char
#define uint unsigned int
#define LCDdata P1
// #define LCDDAdata DAdata
#define DAdata1 P0
void delay(uchar i);
void WR_Com(uchar temp);
void WR_Data(uchar num);
void disp_lcd(uchar addr,uchar *temp1);
void disp_lcdF(uchar addr1,uchar *temp11);
void SquareOUT();
void SineOUT();
void TriangleOUT();
void lcd_Reset();
uchar Wavecount,THtemp,TLtemp;
uchar Waveform=0;
uint WaveCoef,WaveCoef1;
uchar i;
sbit RS=P3^7;
sbit RW=P3^6;
sbit E=P3^5;
sbit DA=P2^0;
sbit KEY=P3^2; uchar code Si
neta
b[256]={
0x80,0x82,0x84,0x86,0x88,0x8a,0x8c,0x8e,
0x90,0x92,0x94,0x96,0x98,0x9a,0x9c,0x9e,
0xa0,0xa2,0xa4,0xa6,0xa8,0xaa,0xab,0xad,
0xaf,0xb1,0xb2,0xb4,0xb6,0xb7,0xb9,0xba,
0xbc,0xbd,0xbf,0xc0,0xc1,0xc3,0xc4,0xc5,
0xc6,0xc8,0xc9,0xca,0xcb,0xcc,0xcd,0xce,
0xce,0xcf,0xd0,0xd1,0xd1,0xd2,0xd2,0xd3,
0xd3,0xd3,
0xd2,0xd2,0xd1,0xd1,0xd0,0xcf,
0xce,0xce,0xcd,0xcc,0xcb,0xca,0xc9,0xc8,
0xc6,0xc5,0xc4,0xc3,0xc1,0xc0,0xbf,0xbd,
0xbc,0xba,0xb9,0xb7,0xb6,0xb4,0xb2,0xb1,
0xaf,0xad,0xab,0xaa,0xa8,0xa6,0xa4,0xa2,
0xa0,0x9e,0x9c,0x9a,0x98,0x96,0x94,0x92,
0x90,0x8e,0x8c,0x8a,0x88,0x86,0x84,0x82,
0x80,0x7d,0x7b,0x79,0x77,0x75,0x73,0x71,
0x6f,0x6d,0x6b,0x69,0x67,0x65,0x63,0x61,
0x5f,0x5d,0x5b,0x59,0x57,0x55,0x54,0x52,
0x50,0x4e,0x4d,0x4b,0x49,0x48,0x46,0x45,
0x43,0x42,0x40,0x3f,0x3e,0x3c,0x3b,0x3a,
0x39,0x37,0x36,0x35,0x34,0x33,0x32,0x31,
0x31,0x30,0x2f,0x2e,0x2e,0x2d,0x2d,0x2c,
0x2c,0x2b,0x2b,0x2b,0x2b,0x2a,0x2a,0x2a,
0x2a,0x2a,0x2a,0x2a,0x2b,0x2b,0x2b,0x2b,
0x2c,0x2c,0x2d,0x2d,0x2e,0x2e,0x2f,0x30,
0x31,0x31,0x32,0x33,0x34,0x35,0x36,0x37,
0x39,0x3a,0x3b,0x3c,0x3e,0x3f,0x40,0x42,
0x43,0x45,0x46,0x48,0x49,0x4b,0x4d,0x4e,
0x50,0x52,0x54,0x55,0x57,0x59,0x5b,0x5d,
0x5f,0x61,0x63,0x65,0x67,0x69,0x6b,0x6d,
0x6f,0x71,0x73,0x75,0x77,0x79,0x7b,0x7d,
};//正弦 uchar code Triangletab[58]={
0x1a,0x21,0x28,0x2f,0x36,0x3d,0x44,0x4b,
0x52,0x59,0x60,0x67,0x6e,0x75,0x7c,0x83,
0x8a,0x91,0x98,0x9f,0xa6,0xad,0xb4,0xbb,
0xc2,0xc9,0xd0,0xd7,0xde,0xe5,
0xde,0xd7,0xd0,0xc9,0xc2,0xbb,0xb4,0xad,
0xa6,0x9f,0x98,0x91,0x8a,0x83,0x7c,0x75,
0x6e,0x67,0x60,0x59,0x52,0x4b,0x44,0x3d,
0x36,0x2f,0x28,0x21
};//三角 uchar code Squaretab[2]={0x56,0xaa};//方波 uchar code disp1[]={"Sine Wave "
"Triangle Wale "
"Square Wave "
}; uchar idata disp2[16]={"Frequency: Hz"}; uchar code Coef[3]={10,100,200};//步进 uchar idata WaveFre[3]={1,1,1}; uchar code WaveTH[]={
0xfc,0xfe,0xfe,0xff,0xff,0xff,0xff,0xff,0xff,0xff,
0xfc,0xfe,0xfe,0xff,0xff,0xff,0xff,0xff,0xff,0xff,
0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff
}; uchar code WaveTL[]={
0xf2,0x78,0xfb,0x3c,0x63,0x7d,0x8f,0x9d,0xa8,0xb1,
0x17,0x0b,0xb2,0x05,0x37,0x58,0x70,0x82,0x90,0x9b,
0x4d,0xa7,0xc4,0xd3,0xdc,0xe2,0xe6,0xea,0xec,0xee
};
void main()
{
lcd_Reset(); //1602初始化 P2=0xff; WR_Com(0x8c); //设置频率值显示初始位置
WaveCoef=WaveFre[Waveform]*Coef[Waveform];//计算频率值 //需要输出的频率值
disp2[13]=WaveCoef%10+0x30;//取个位
WaveCoef/=10;
disp2[12]=WaveCoef%10+0x30;//取十位
WaveCoef/=10;
disp2[11]=WaveCoef%10+0x30;//取百位
WaveCoef/=10;
disp2[10]=WaveCoef%10+0x30;//取千位
WaveCoef/=10; disp_lcd(0x80,&disp1[Waveform*13]);
disp_lcd(0xc0,disp2);
// i=0;
LCDdata=0x00;
DAdata1=0x00;
DA=0; TMOD=0x01; //设置定时器0工作于方式1
IT0=1; //设置外部中断0为下降沿触发
ET0=1; //允许定时器0申请中断
EX0=1; //允许外部中断0申请中断 TH0=THtemp; //装载定时初值
TL0=TLtemp; EA=1; //开总中断
while(1);
}
/*************************************************************************************
函数名：LCD初始化
功能：设置LCD显示规则，设置显示模式:8位子行5×7点阵
显示器开、光标开、光标允许闪烁
文字不动，光标自动右移
变量：无
输入：无
输出：无
***************************************************************************************/
void lcd_Reset()
{
WR_Com(0x01); //清屏光标复位
WR_Com(0x38); //设置显示模式:8位子行5×7点阵 WR_Com(0x0c); //显示器开、光标关、光标不允许闪烁
WR_Com(0x06); //文字不动，光标自动右移
} /**********************************************************************************
函数名：LCD写入控制
功能：将命令写入到LCD
输入：temp；待输出的命令数据
输出：无
*************************************************************************************/
void WR_Com(uchar temp)
{
RS=0;
RW=0;
LCDdata=temp;
E=0;
delay(10);
E=1;
} /********************************************************************************
函数名：LCD完成显示功能
功能：在LCD的界面上显示出数据
输入：num；待输出数据
输出：无
*************************************************************************************/
void WR_Data(uchar num)
{
RS=1;
RW=0;
LCDdata=num;
E=0;
delay(10);
E=1;
} /***********************************************************************************************
函数名：LCD连续显示
功能：在LCD上连续显示16位数据
输入：addr、*temp1
输出：无
**********************************************************************************************/
void disp_lcd(uchar addr,uchar *temp1)
{
uchar J;
WR_Com(addr);
delay(10);
for(J=0;J<16;J++)
{
WR_Data(temp1[J]);
delay(10);
}
} /****************************************************************************
函数名：LCD更新频率
功能：
输入：addr、*temp1
输出：无
****************************************************************************/
void disp_lcdF(uchar addr1,uchar *temp11)
{
uchar i;
WR_Com(addr1);
delay(10);
for(i=0;i<3;i++)
{
WR_Data(temp11[i]);
delay(10);
}
} /***********************************************************************************************
函数名：延时1ms
输入：i
输出：无
**********************************************************************************************/
void delay(uchar i)
{
uchar j;
while(--i)
for(j=0;j<72;j++);
} /****************************************************************************
函数名：中断
功能：
输入：
输出：无
****************************************************************************/
void key_int() interrupt 0
{
uchar keytemp,keytemp1; EA=0; //关总中断
TR0=0; //关定时器0
keytemp1=0;
delay(10); // 消拌
P2=0xff; keytemp=(~P2)&0x1e;
keytemp>>=1;
while(!KEY);//判断按键是否放开 if(keytemp!=keytemp1)
{
keytemp1=keytemp; switch(keytemp)
{
case 1:
{if(++Waveform==3) Waveform=0; break;}//选择输出信号的种类，0为正弦波，1为三角波，2为方波
case 2:
{if(++WaveFre[Waveform]==49) WaveFre[Waveform]=1;break;}//倍加
case 4:
{if(--WaveFre[Waveform]==0) WaveFre[Waveform]=10;break;}//倍减
} THtemp=WaveTH[Waveform*10+(WaveFre[Waveform]-1)];
TLtemp=WaveTL[Waveform*10+(WaveFre[Waveform]-1)];
// WaveCoef1=WaveFre[Waveform]*Coef[Waveform];//计算需要输出信号的频率
WaveCoef=WaveFre[Waveform]*Coef[Waveform];
disp2[13]=WaveCoef%10+0x30;//取个位
WaveCoef/=10;
disp2[12]=WaveCoef%10+0x30;//取十位
WaveCoef/=10;
disp2[11]=WaveCoef%10+0x30;//取百位
WaveCoef/=10;
disp2[10]=WaveCoef%10+0x30;//取千位
// WaveCoef/=10;
disp_lcd(0x80,&disp1[Waveform*16]);
disp_lcdF(0xca,&disp2[10]);
P2=0xff;
}
TH0=THtemp;
TL0=TLtemp;
Wavecount=0; //设置下一个波形从起点开始画
EA=1;
} /****************************************************************************
函数名：中断
功能：判别按键按了几下，1为正弦波，2为三角波，3为方波
输入：
输出：无
****************************************************************************/
void timer() interrupt 1
{
TH0=THtemp;
TL0=TLtemp; if(Waveform==0)
SineOUT();
else if(Waveform==1)
TriangleOUT();
else if(Waveform==2)
SquareOUT();
} /****************************************************************************
函数名：输出正弦波
****************************************************************************/
void SineOUT()
{
DAdata1=Sinetab[Wavecount++];
Wavecount=0;
DA=0;
_nop_() ;
DA=1;
}
/****************************************************************************
函数名：输出三角波
****************************************************************************/
void TriangleOUT()
{
DAdata1=Triangletab[Wavecount++];
if(Wavecount>57)
Wavecount=0;
DA=0;
_nop_();
DA=1;
} /****************************************************************************
函数名：输出方波
****************************************************************************/
void SquareOUT()
{
DAdata1=Squaretab[Wavecount++];
if(Wavecount>1)
Wavecount=0;
DA=0;
_nop_();
DA=1;
}