不知道哪里出錯，仿真時沒波形，求高手修改。或有更簡單的代碼和仿真圖也可以發給我。要簡單的！
#include<reg51.h>
#include<absacc.h>
#define P0 XBYTE[0xdf00] // P0瑣存地址
unsigned char code
seg[]={0xC0,0xF9,0xA4,0xB0,0x99,0x92,0x82,0xF8,0x80,0x90}; //顯示數組
unsigned char code sig_sin[256]={
0x80,0x83,0x86,0x89,0x8c,0x8f,0x92,0x95,0x98,0x9c,0x9f,0xa2,0xa5,0xa8,0xab,0xae,
0xb0,0xb3,0xb6,0xb9,0xbc,0xbf,0xc1,0xc4,0xc7,0xc9,0xcc,0xce,0xd1,0xd3,0xd5,0xd8,
0xda,0xdc,0xde,0xe0,0xe2,0xe4,0xe6,0xe8,0xea,0xec,0xed,0xef,0xf0,0xf2,0xf3,0xf4,
0xf6,0xf7,0xf8,0xf9,0xfa,0xfb,0xfc,0xfc,0xfd,0xfe,0xfe,0xff,0xff,0xff,0xff,0xff,
0xff,0xff,0xff,0xff,0xff,0xff,0xfe,0xfe,0xfd,0xfc,0xfc,0xfb,0xfa,0xf9,0xf8,0xf7,
0xf6,0xf5,0xf3,0xf2,0xf0,0xef,0xed,0xec,0xea,0xe8,0xe6,0xe4,0xe3,0xe1,0xde,0xdc,
0xda,0xd8,0xd6,0xd3,0xd1,0xce,0xcc,0xc9,0xc7,0xc4,0xc1,0xbf,0xbc,0xb9,0xb6,0xb4,
0xb1,0xae,0xab,0xa8,0xa5,0xa2,0x9f,0x9c,0x99,0x96,0x92,0x8f,0x8c,0x89,0x86,0x83,
0x80,0x7d,0x79,0x76,0x73,0x70,0x6d,0x6a,0x67,0x64,0x61,0x5e,0x5b,0x58,0x55,0x52,
0x4f,0x4c,0x49,0x46,0x43,0x41,0x3e,0x3b,0x39,0x36,0x33,0x31,0x2e,0x2c,0x2a,0x27,
0x25,0x23,0x21,0x1f,0x1d,0x1b,0x19,0x17,0x15,0x14,0x12,0x10,0xf,0xd,0xc,0xb,0x9,
0x8,0x7,0x6,0x5,0x4,0x3,0x3,0x2,0x1,0x1,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,
0x0,0x1,0x1,0x2,0x3,0x3,0x4,0x5,0x6,0x7,0x8,0x9,0xa,0xc,0xd,0xe,0x10,0x12,0x13,
0x15,0x17,0x18,0x1a,0x1c,0x1e,0x20,0x23,0x25,0x27,0x29,0x2c,0x2e,0x30,0x33,0x35,
0x38,0x3b,0x3d,0x40,0x43,0x46,0x48,0x4b,0x4e,0x51,0x54,0x57,0x5a,0x5d,0x60,0x63,
0x66,0x69,0x6c,0x6f,0x73,0x76,0x79,0x7c
};
unsigned char a; //全局信號信號選擇變量
unsigned int b; //全局信號檔位變量送顯示
unsigned int pinlv; // 檔位變量送定時器賦初值
unsigned int i=0; // 中斷服務計數
sbit butten_swtich=P3^2; //按鍵1 波形選擇
sbit butten_up =P3^3; //按鍵2 頻率+
sbit butten_down =P3^4; //按鍵3 頻率-
void delay1ms(unsigned char ii)//延時基時1毫秒 子程序
{
unsigned char jj;
for(;ii>0;ii--)
for(jj=0;jj<125;jj++);
}
void Init_Timer1(void) //定時器0初始化
{
EA=1; //開總中斷
ET1=1; //定時器T1中斷允許
TMOD=0x10; //TMOD=0001 000B，使用定時器T1的模式1
TH1=(65536-500)/256; //定時器T1的高8位賦初值
TL1=(65536-500)%256; //定時器T1的高8位賦初值
TR1=1; //啟動定時器T1
}
void butten_scan1() //按鍵處理子程序
{
if(butten_swtich==0) //信號按鍵選擇
{
delay1ms(20);//消抖延時
if(butten_swtich==0)
{
while(!butten_swtich); //等待按鍵松開
a++;
if(a>3)a=1; //循環選擇
}
}
}
void butten_scan2()
{
if(butten_up==0) //信號按鍵選擇
{
delay1ms(20); //消抖延時
if(butten_up==0)
{
while(!butten_up); //等待按鍵松開
b=b+1;
if(b>9)b=9; //再按加就不再加了
}
}
else if(butten_down==0) //信號按鍵選擇
{
delay1ms(10);//消抖延時
if(butten_down==0)
{
while(!butten_down); //等待按鍵松開
b=b-1;
if(b<1)b=1; //再按減就不再減了
}
}
}
main()
{
a=1;b=5;
Init_Timer1();
while(1)
{
butten_scan1(); //調用按鍵處理子程序
butten_scan2();
P2=0x1;
P1=seg[a]; //信號輸出送顯示 1三角波 2正弦波 3方波
delay1ms(10);
P2=0x8;
P1=seg; //檔位顯示0~9 默認第5檔
delay1ms(10);
}
}
void OS_Timer1(void) interrupt 3 // 系統OS定時中斷服務
{
switch(b) //根據不同的檔位給定時器賦不同的初值
{
case 1: pinlv=0xf2;break;
case 2: pinlv=0xf3;break;
case 3: pinlv=0xf4;break;
case 4: pinlv=0xf5;break;
case 5: pinlv=0xf6;break;
case 6: pinlv=0xf7;break;
case 7: pinlv=0xf8;break;
case 8: pinlv=0xf9;break;
case 9: pinlv=0xfa;break;
}
TH1=pinlv; //定時器賦初值
TL1=0xff; //定時器賦初值
if (a==1) P0=sig_sin; //P0口給正弦波信號數組
else if (a==2) {if(i<128)P0=2*i;else P0=254-2*i;}//P0口給三角波信號數組
else if (a==3){ if(i>128)P0=0xff;else P0=0;} //方波
i++;if(i>255)i=0;
}
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