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#include<reg52.h> //包含頭文件
#include<intrins.h>
#define uchar unsigned char //宏定義
#define uint unsigned int
sbit s1=P3^5; //定義按鍵的接口
sbit s2=P3^6;
sbit s3=P3^7;
sbit s4=P3^4;
sbit led0=P3^0; //定義四個(gè)LED，分別表示不同的波形
sbit led1=P3^1;
sbit led2=P3^2;
sbit led3=P3^3;
sbit lcdrs=P2^7; //液晶控制引腳，還有一個(gè)控制腳是RW，因?yàn)槲覀冎恍枰蛞壕Ю飳憯?shù)據(jù)系那是就好了，所以，我們直接將RW引腳接地
sbit lcden=P2^6;
char num,boxing,u; //定義全局變量
int pinlv=100,bujin=1,bujin1=1; //頻率初始值是10Hz，步進(jìn)值默認(rèn)是0.1，顯示步進(jìn)值變量
uchar code table[]="0123456789"; //定義顯示的數(shù)組
uchar code table1[]="Fout= Wave form:"; //初始化顯示字符
unsigned long int m; //定義長整形變量 m
int a,b,h,num1; //定義全局變量
//自定義字符
uchar code zifu[]={ //此數(shù)組內(nèi)數(shù)據(jù)為液晶上顯示波形符號(hào)的自定義字符
0x0e,0x11,0x11,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x11,0x11,0x0e,0x00, //正弦波 0 1
0x00,0x07,0x04,0x04,0x04,0x04,0x1c,0x00,
0x00,0x1c,0x04,0x04,0x04,0x04,0x07,0x00, //矩形波 2 3
0x00,0x01,0x02,0x04,0x08,0x10,0x00,0x00,
0x00,0x10,0x08,0x04,0x02,0x01,0x00,0x00, //三角波 4 5
0x00,0x01,0x03,0x05,0x09,0x11,0x00,0x00, //鋸齒波 6
};
uchar code sin[64]={ //此數(shù)組內(nèi)的數(shù)據(jù)為，da輸出對(duì)應(yīng)電壓值對(duì)應(yīng)的數(shù)字量，0是0V，255是5V
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
}; //正弦波取碼
uchar code juxing[64]={ //一個(gè)周期是采樣64個(gè)點(diǎn)，所以數(shù)組內(nèi)是64個(gè)數(shù)據(jù)
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
}; //矩形波取碼
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
}; //三角波取碼
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
}; //鋸齒波取碼
void delay(uint xms) //延時(shí)函數(shù)
{
int a,b;
for(a=xms;a>0;a--)
for(b=110;b>0;b--);
}
void write_com(uchar com) //寫命令函數(shù)
{
lcdrs=0;
P0=com;
delay(1);
lcden=1;
delay(1);
lcden=0;
}
void write_date(uchar date) //寫數(shù)據(jù)函數(shù)
{
lcdrs=1;
P0=date;
delay(1);
lcden=1;
delay(1);
lcden=0;
}
//自定義字符集
void Lcd_ram()
{
uint i,j,k=0,temp=0x40;
for(i=0;i<7;i++)
{
for(j=0;j<8;j++)
{
write_com(temp+j);
write_date(zifu[k]);
k++;
}
temp=temp+8;
}
}
void init_lcd() //初始化函數(shù)
{
uchar i;
lcden=0; //默認(rèn)開始狀態(tài)為關(guān)使能端，見時(shí)序圖
Lcd_ram();
write_com(0x0f);
write_com(0x38); //顯示模式設(shè)置，默認(rèn)為0x38,不用變。
write_com(0x01); //顯示清屏，將上次的內(nèi)容清除，默認(rèn)為0x01.
write_com(0x0c); //顯示功能設(shè)置0x0f為開顯示，顯示光標(biāo)，光標(biāo)閃爍；0x0c為開顯示，不顯光標(biāo)，光標(biāo)不閃
write_com(0x06); //設(shè)置光標(biāo)狀態(tài)默認(rèn)0x06,為讀一個(gè)字符光標(biāo)加1.
write_com(0x80); //設(shè)置初始化數(shù)據(jù)指針，是在讀指令的操作里進(jìn)行的
for(i=10;i<20;i++) //顯示初始化
{
write_date(table1[i]); //顯示第一行字符
}
write_com(0x80+0x40); //選擇第二行
for(i=0;i<9;i++)
{
write_date(table1[i]); //顯示第二行字符
}
write_com(0x80+10); //選擇第一行第十個(gè)位置
write_date(0);
write_date(1);
write_date(0);
write_date(1);
write_date(0);
write_date(1); //顯示自定義的波形圖案
write_com(0x80+0x40+0x09); //選擇第二行第九個(gè)位置
write_date(' ');
write_date('1');
write_date('0');
write_date('.');
write_date('0');
write_date('H');
write_date('z'); //顯示初始的頻率值
}
void initclock() //定時(shí)器初始化函數(shù)
{
TMOD=0x01; //定時(shí)器的工作方式
TH0=a;
TL0=b; //定時(shí)器賦初值
EA=1; //打開中斷總開關(guān)
ET0=1; //打開定時(shí)器允許中斷開關(guān)
TR0=1; //打開定時(shí)器定時(shí)開關(guān)
}

復(fù)制代碼

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