输出的频率与1602上显示的频率不一致，相差很多，希望能帮我解决，谢谢！
时间：10-02
整理：3721RD
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#include <reg51.h>
#include<string.h>
#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=0;
uchar ys=30;
uchar i,a=0;
uchar sqar_num=128;
uint freq;
uchar code Sin[]={"Sine "};
//uchar code exp[]={"Exp "};
uchar code Squ[]={"Square "} ;
uchar code Tri[]={"Triangle "};
uchar code Saw[]={"Sawtooth "} ;
uchar code No[]={"No OutPut"};
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}; //?y?ò2¨??
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; // ??′??÷????
RW=1; //?á×′ì???′??÷
EN=1; // ?aê??á
DelayMS(1);
LCD_Status=P1;
EN=0;
return LCD_Status;
}
void Write_LCD_Command(uchar cmd)
{
while((Busy_Check()&0x80)==0x80);
RS=0;
RW=0;
EN=0;
P1=cmd;
EN=1;
DelayMS(1);
EN=0;
}
void Write_LCD_Data(uchar dat)
{
while((Busy_Check()&0x80)==0x80);
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);
DelayMS(1);
Write_LCD_Command(0x06);
DelayMS(1);
Write_LCD_Command(0x0C);
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<sizeof(No)-1;i++)
{
Write_LCD_Data(No);
DelayMS(5);
}
break;
case 1:
ys=5;
Write_LCD_Command(0x86);
DelayMS(5);
for (i=0;i<sizeof(Sin)-1;i++)
{
Write_LCD_Data(Sin);
DelayMS(5);
}
break;
case 2:
ys=30;
Write_LCD_Command(0x86);
DelayMS(5);
for (i=0;i<sizeof(Squ)-1;i++)
{
Write_LCD_Data(Squ);
DelayMS(5);
}
break;
case 3:
ys=30;
Write_LCD_Command(0x86);
DelayMS(5);
for (i=0;i<sizeof(Tri)-1;i++)
{
Write_LCD_Data(Tri);
DelayMS(5);
}
break;
case 4:
ys=30;
Write_LCD_Command(0x86);
DelayMS(5);
for (i=0;i<sizeof(Saw)-1;i++)
{
Write_LCD_Data(Saw);
DelayMS(5);
}
break;
}
}
void Out_Wave(uchar i)
{ uchar j;
switch(i)
{
case 0: P0=0x00;break;
case 1:
for (j=0;j<255;j++)
{
P0=tosin[j];
Delay1(ys);
}
break;
case 2:
{
if(a<sqar_num)
{
P0=0xff;
Delay1(ys);
}
else
{
P0=0x00;
Delay1(ys);
}
a++;
} break;
case 3:
{
if(a<128)
{
P0=a;
Delay1(ys);
}
else
{
P0=255-a;
Delay1(ys);
}
a++;
} break;
case 4:
{
if(a<255)
{
P0=a;
Delay1(ys);
}
a++;
if(a==255)
{
a=0;
} break;
}
}
}
void keyscanf()
{
if(K2==0)
{
DelayMS(5);
if(K2==0)
{
while(！K2);
ys--;
if(ys==0)
ys=20;
}
}
if(K3==0)
{
DelayMS(5);
if(K3==0)
{
while(！K3);
ys++;
if(ys>22)
ys=20;
}
}
if(K4==0)
{
DelayMS(5);
if(K4==0)
{
while(！K4);
if(WaveChoice==2)
sqar_num=sqar_num+2;
if(sqar_num==238)
sqar_num=128;
}
}
if(K5==0)
{
DelayMS(5);
if(K5==0)
{
while(！K5);
if(WaveChoice==2)
sqar_num=sqar_num-2;
if(sqar_num==18)
sqar_num=128;
}
}
}
void main()
{
Init_LCD();
IE=0X81;
IT0=1;
Write_LCD_Command(0x80);
DelayMS(5);
for (i=0;i<sizeof(Wave)-1;i++)
{
Write_LCD_Data(Wave);
DelayMS(5);
}
Write_LCD_Command(0x80+0X40);
DelayMS(5);
for (i=0;i<sizeof(Fre)-1;i++)
{
Write_LCD_Data(Fre);
DelayMS(5);
}
Write_wave(WaveChoice);
while (1)
{
keyscanf();
Out_Wave(WaveChoice);
if(！(K1&K2&K3))
Xianshi_f();
}
}
void EX_INT0() interrupt 0
{
WaveChoice++;
if(WaveChoice==5) WaveChoice=1;
Write_wave(WaveChoice);
}
#include<string.h>
#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=0;
uchar ys=30;
uchar i,a=0;
uchar sqar_num=128;
uint freq;
uchar code Sin[]={"Sine "};
//uchar code exp[]={"Exp "};
uchar code Squ[]={"Square "} ;
uchar code Tri[]={"Triangle "};
uchar code Saw[]={"Sawtooth "} ;
uchar code No[]={"No OutPut"};
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}; //?y?ò2¨??
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; // ??′??÷????
RW=1; //?á×′ì???′??÷
EN=1; // ?aê??á
DelayMS(1);
LCD_Status=P1;
EN=0;
return LCD_Status;
}
void Write_LCD_Command(uchar cmd)
{
while((Busy_Check()&0x80)==0x80);
RS=0;
RW=0;
EN=0;
P1=cmd;
EN=1;
DelayMS(1);
EN=0;
}
void Write_LCD_Data(uchar dat)
{
while((Busy_Check()&0x80)==0x80);
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);
DelayMS(1);
Write_LCD_Command(0x06);
DelayMS(1);
Write_LCD_Command(0x0C);
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<sizeof(No)-1;i++)
{
Write_LCD_Data(No);
DelayMS(5);
}
break;
case 1:
ys=5;
Write_LCD_Command(0x86);
DelayMS(5);
for (i=0;i<sizeof(Sin)-1;i++)
{
Write_LCD_Data(Sin);
DelayMS(5);
}
break;
case 2:
ys=30;
Write_LCD_Command(0x86);
DelayMS(5);
for (i=0;i<sizeof(Squ)-1;i++)
{
Write_LCD_Data(Squ);
DelayMS(5);
}
break;
case 3:
ys=30;
Write_LCD_Command(0x86);
DelayMS(5);
for (i=0;i<sizeof(Tri)-1;i++)
{
Write_LCD_Data(Tri);
DelayMS(5);
}
break;
case 4:
ys=30;
Write_LCD_Command(0x86);
DelayMS(5);
for (i=0;i<sizeof(Saw)-1;i++)
{
Write_LCD_Data(Saw);
DelayMS(5);
}
break;
}
}
void Out_Wave(uchar i)
{ uchar j;
switch(i)
{
case 0: P0=0x00;break;
case 1:
for (j=0;j<255;j++)
{
P0=tosin[j];
Delay1(ys);
}
break;
case 2:
{
if(a<sqar_num)
{
P0=0xff;
Delay1(ys);
}
else
{
P0=0x00;
Delay1(ys);
}
a++;
} break;
case 3:
{
if(a<128)
{
P0=a;
Delay1(ys);
}
else
{
P0=255-a;
Delay1(ys);
}
a++;
} break;
case 4:
{
if(a<255)
{
P0=a;
Delay1(ys);
}
a++;
if(a==255)
{
a=0;
} break;
}
}
}
void keyscanf()
{
if(K2==0)
{
DelayMS(5);
if(K2==0)
{
while(！K2);
ys--;
if(ys==0)
ys=20;
}
}
if(K3==0)
{
DelayMS(5);
if(K3==0)
{
while(！K3);
ys++;
if(ys>22)
ys=20;
}
}
if(K4==0)
{
DelayMS(5);
if(K4==0)
{
while(！K4);
if(WaveChoice==2)
sqar_num=sqar_num+2;
if(sqar_num==238)
sqar_num=128;
}
}
if(K5==0)
{
DelayMS(5);
if(K5==0)
{
while(！K5);
if(WaveChoice==2)
sqar_num=sqar_num-2;
if(sqar_num==18)
sqar_num=128;
}
}
}
void main()
{
Init_LCD();
IE=0X81;
IT0=1;
Write_LCD_Command(0x80);
DelayMS(5);
for (i=0;i<sizeof(Wave)-1;i++)
{
Write_LCD_Data(Wave);
DelayMS(5);
}
Write_LCD_Command(0x80+0X40);
DelayMS(5);
for (i=0;i<sizeof(Fre)-1;i++)
{
Write_LCD_Data(Fre);
DelayMS(5);
}
Write_wave(WaveChoice);
while (1)
{
keyscanf();
Out_Wave(WaveChoice);
if(！(K1&K2&K3))
Xianshi_f();
}
}
void EX_INT0() interrupt 0
{
WaveChoice++;
if(WaveChoice==5) WaveChoice=1;
Write_wave(WaveChoice);
}
既没有功能介绍也没有注释，看得很吃力也没有看出所以然。通常遇到一时搞不清的问题最好是分块测试。
freq=(10000000/(50000+2860*ys));
这个数算完可能是浮点数了，要强制转换为unsigned int，而且不能大于65535啊
你显示的频率是根据输入的参数算出来的，并不是测量输出得到的，没看懂你波形输出部分，但是如果这部分做的不好，不符合输入的参数，那就应该查这部分。
你得确定你输入的参数是多少，再判断显示的和输入的参数是否符合，最后测量输出的波形于参数是否一致。
大致看了一下你的程序，估计是波形输出部分做得不好。
不懂，路过，围观一下。
谢谢，小编提供的场地。
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