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1、信号源（正弦波，三角波，锯齿波，方波，步进10HZ,0.1V）2009-08-27 19:14:00|分类：默认分类|字号订阅#include #define uchar unsigned char#define uint unsigned int#define DAC1 P0#define DAC2 P2sbit rs=P30;sbit rw=P31;sbit en=P32;sbit k1=P33;sbit k2=P34;sbit k3=P35;sbit k4=P36;uchar mm,gao,di,temp,k1num,k2num,num,Anum,Fnum;uchar bai,shi,g
2、e,Fbai,Fshi,Fge,date2,Ashi,Age;uchar code tbsin=128,144,160,175,190,203,216,227,236,244,250,254,255,255,254,250,244,236,227,216,203,190,175,160,144,128,112,96,81,66,53,40,29,20,12,6,2,0,0,2,6,12,20,29,40,53,66,81,96,112;uchar code tbsanjiao=0,10.625,21.25,31.875,42.5,53.125,63.75,74.375,85,95.625,10
3、6.25,116.875,127.5,138.125,148.75,159.375,170,180.625,191.25,201.875,212.5,223.125,233.75,244.375,255,255,244.375,233.75,223.125,212.5,201.875,191.25,180.625,170,159.375,148.75,138.125,127.5,116.875,106.25,95.625,85,74.375,63.75,53.125,42.5,31.875,21.25,10.625,0,;uchar code tbjuchi=0,5,10,16,21,26,3
4、1,36,42,47,52,57,62,68,73,78,83,88,94,99,104,109,115,120,125,130,135,141,146,151,156,161,167,172,177,182,187,193,198,203,208,213,219,224,229,234,239,245,250,255,;uchar code tbfangbo=0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,
5、255,255,255,255,255,255,255,255;uchar code tbDAC2=1,5,10,16,21,26,31,36,42,47,52,57,62,68,73,78,83,88,94,99,104,109,115,120,125,130,135,141,146,151,156,161,167,172,177,182,187,193,198,203,208,213,219,224,229,234,239,245,250,255,;uchar code tbF=56,74,89,102,113,123,131,138,145,151,156,161,165,169,173
6、,176,179,182,185,187,189,191,194,195,197,199,200,202,203,205,206,207,208,209,211,212,213,213,214,215,216;void delay(uint z)/延时 uint x,y; for(x=z;x0;x-) for(y=110;y0;y-);void write_com(uchar com)/LCD写命令rs=0; rw=0; en=0; P1=com; delay(2); en=1; delay(2); en=0;void write_date( uchar date)/LCD写数据rs=1; r
7、w=0; en=0; P1=date; delay(2); en=1; delay(2); en=0;void lcd_wr_str(uchar i,uchar *date)/写一个字符串if(i=0)write_com(0x80);while(*date!=0) write_date(*date);date+;delay(5); if(i=1) write_com(0x80+0x40);while(*date!=0)write_date(*date);date+;delay(5);void init()/初始化TMOD=0x02; TH0=56; TL0=56; EA=1; ET0=1; T
8、R0=1; en=0;write_com(0x38);write_com(0x06);write_com(0x0f); write_com(0x0c);write_com(0x80); write_com(0x01); write_com(0x80+5); delay(5); lcd_wr_str(0, Press K1); lcd_wr_str(1, Chose One Wave);void timer0() interrupt 1/中断switch (k1num) case 1:num+;if(num=50)num=0;DAC1=tbsinnum; break;/正弦波case 2:num
9、+;if(num=50)num=0;DAC1=tbsanjiaonum;break;/三角波case 3:num+;if(num=50)num=0;DAC1=tbjuchinum; break;/锯齿波case 4:num+;if(num=50)num=0;DAC1=tbfangbonum; break;/方波void sel_wave(void) if(k1=0)/选择波形TR0=0;delay(5);if(k1=0)while(!k1);delay(5);k1num+;if(k1num=5)k1num=0; TR0=1;void sel_FV()/选择调幅 调频 TR0=0;if(k2=0
10、)delay(10);if(k2=0)while(k2=0);k2num+;if(k2num=3)k2num=0; TR0=1;void keyadd()if(k3=0)delay(10);if(k3=0)while(!k3);if(k2num=1)/调幅+ DAC2=tbDAC2Anum; Anum+; if(Anum=50)Anum=0; write_com(0x01); lcd_wr_str(0, tbDAC2Anum/10 . tbDAC2Anum%10 V);else if(k2num=2) /调频+ /while(!k3); Fnum+; TH0=tbFFnum; if(Fnum=
11、50)Fnum=0; write_com(0x01); lcd_wr_str(1, tbDAC2Anum/100 tbDAC2Anum/10%10 tbDAC2Anum%10 F);void keysub()if(k4=0)delay(10);if(k4=0)if(k2num=1)/调幅- DAC2=tbDAC2Anum; Anum-; if(Anum=0)Anum=50; write_com(0x01); lcd_wr_str(0, tbDAC2Anum/10 . tbDAC2Anum%10 V);else if(k2num=2) /调频- TH0=tbFFnum; Fnum-; if(Fnum=0)Fnum=50; write_com(0x01); lcd_wr_str(1, tbDAC2Anum/100 tbDAC2Anum/10%10 tbDAC2Anum%10 F);while(!k4);void main()init(); DAC2=0xff;while(1) sel_wave(); sel_FV(); keyadd(); keysub();
