#include <reg52.h> //頭文件
#define uchar unsigned char
#define uint unsigned int
sbit lcdrw=P3^3; //位變量的定義
sbit lcdrs=P3^2; //位變量的定義
sbit lcde=P3^4; //位變量的定義
sbit s1=P2^0; //位變量的定義
sbit s2=P2^1; //位變量的定義
sbit s3=P2^2; //位變量的定義
sbit cs1=P3^5; //位變量的定義
sbit cs2=P3^6; //位變量的定義
uchar s1num,a,ys,j; //變量的定義（字符型）
uint fre; //變量的定義（整型）
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 };/*正弦波碼 */
void delay(uint z) //延時(shí)子程序
{
uchar i,j;
for(i=z;i>0;i--)
for(j=110;j>0;j--);
}
void delay1(uint y) //延時(shí)子程序
{
uint i;
for(i=y;i>0;i--);
}
void write_com(uchar com) //1602寫指令
{
lcdrs=0;
P1=com;
delay(5);
lcde=1;
delay(5);
lcde=0;
}
void write_data(uchar date) //1602數(shù)據(jù)
{
lcdrs=1;
P1=date;
delay(5);
lcde=1;
delay(5);
lcde=0;
}
void init() //初始化
{
lcdrw=0;
lcde=0;
cs2=0;
cs1=0;
write_com(0x38);
write_com(0x0c);
write_com(0x06);
write_com(0x01);
write_com(0x80+0x00);
write_data(0x77); //寫wave:
write_data(0x61);
write_data(0x76);
write_data(0x65);
write_data(0x3a);
write_com(0x80+0x40); //寫 f：
write_data(0x66);
write_data(0x3a);
}
void write_f(uint date) //寫頻率
{
uchar qian,bai,shi,ge;
qian=date/1000;
bai=date/100%10;
shi=date/10%10;
ge=date%10;
write_com(0x80+0x42);
write_data(0x30+qian);
write_data(0x30+bai);
write_data(0x30+shi);
write_data(0x30+ge);
write_data(0x48);
write_data(0x5a);
}
void xsf() //顯示頻率
{
if(s1num==1) //if語(yǔ)句（判斷是否是狀態(tài)1）
{
fre=(1000/(9+3*ys)); //頻率計(jì)算公式
write_f(fre); //寫頻率
}
}
void keyscanf() //按鍵部分
{
if(s1==0)
{
delay(5);
if(s1==0)
{
while(!s1); //無(wú)限循環(huán)函數(shù)
s1num++; //s1num+1
if(s1num==1) //if語(yǔ)句（判斷是否是狀態(tài)1）
{
ys=0;
write_com(0x80+0x05);
write_data(0x73); //寫sine:
write_data(0x69);
write_data(0x6e);
write_data(0x65);
write_data(0x20);
write_data(0x20);
}
if(s1num==2) //if語(yǔ)句（判斷是否是狀態(tài)2）
{
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);
write_data(0x20);
write_data(0x20);
}
}
}
if(s2==0) //按鍵減頻率
{
delay(5);
if(s2==0)
{
while(!s2);
ys++;
}
}
if(s3==0) //按鍵加頻率
{
delay(5);
if(s3==0)
{
while(!s3);
ys--;
}
}
}
void main() //主函數(shù)
{
init();
while(1) //無(wú)限循環(huán)語(yǔ)句
{
keyscanf();
if(s1num==1) //正弦波
{
for(j=0;j<255;j++)
{
P0=tosin[j];
delay1(ys);
}
}
if(!(s1&s2&s3))
{
xsf();
}
}
}
這個(gè)程序有什么問(wèn)題嗎？為什么導(dǎo)入單片機(jī)中沒(méi)有正弦波呢？
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