xin.zip_三角波发生器_方波发生器_波形发生器

#include<reg51.h> #include "1602.h" #include<absacc.h> #define DAC0832 XBYTE[0xfffe] #define DAC0832R XBYTE[0xfffd] #define uchar unsigned char #define uint unsigned int sbit P10=P1^0; sbit P11=P1^1; sbit P12=P1^2; sbit P13=P1^3; sbit P14=P1^4; sbit P15=P1^5; sbit P16=P1^6; sbit P17=P1^7; sbit P33=P3^3; uchar table[]="BOXINGFASHENGQI"; uchar table1[]=" sin "; uchar table2[]=" tran "; uchar table3[]=" square "; uchar regi,freq=100; uchar keyvalue; uchar flag;//波形输出标志位 uchar code tab1[128]={ 64,67,70,73,76,79,82,85,88,91,94,96,99,102,104,106, 109,111,113,115,117,118,120,121,123,124,125,126,126, 127,127,127,127,127,127,127,126,126,125,124,123,121, 120,118,117,115,113,111,109,106,104,102,99,96,94,91, 88,85,82,79,76,73,70,67,64,60,57,54,51,48,45,42,39, 36,33,31,28,25,23,21,18,16,14,12,10,9,7,6,4,3,2,1, 1,0,0,0,0,0,0,0,1,1,2,3,4,6,7,9,10,12,14,16,18,21,23, 25,28,31,33,36,39,42,45,48,51,54,57,60}; uchar code tab3[2]={0,1}; void delay2(uint t) /* 延时2us函数 */ { uint i,j; for(i=t;i;i--) for(j=10;j;j--); } void delay(uint t) /*延迟函数*/ {while(t--);} void square() /* 方波发生函数 */ { uint i; while(flag) { DAC0832R=regi; for(i=0;i<=63;i++) //fuzhi=63 { DAC0832=0x00; delay2(freq); } for(i=0;i<=63;i++) { DAC0832=0xff; delay2(freq); } } } void sin( ) /*正弦波*/ { unsigned int i; while(flag) { DAC0832R=regi; if(i==63*2) i=0; DAC0832=tab1[i++]; delay2(freq); } } void tran(void) /*三角波*/ { uchar i; while(flag) { DAC0832R=regi; for(i=0;i<=63;i++) //fuzhi=63 { delay2(freq); DAC0832=i; } for(i=63;i>=0;i--) { delay2(freq); DAC0832=i; } if(flag==0) { break; } } } void main() /*主函数*/ { EA=1; EX0=1;//外部中断0打开 IT0=0;//低电平出发 regi=102; init_lcd(); Print_String(0,1,table); while(1) { DAC0832R=regi; if(P1!=0) { //delay(3); if(P11==0) { keyvalue=1; flag=1; Print_String(2,1,table1);//sin } if(P12==0) { keyvalue=2; flag=1; Print_String(2,1,table2);//tran } if(P13==0) { keyvalue=3; flag=1; Print_String(2,1,table3);//square } } if(keyvalue) { if(keyvalue==1) sin(); if(keyvalue==2) tran(); if(keyvalue==3) square(); } } } void INT_0(void)interrupt 0 using 0 { EX0=0;//外部中断0关闭 keyvalue=0; if(P14==0) { freq=freq-10;//频率增加 } if(P15==0) { freq=freq+10; } if(P16==0) { regi=regi+25.5; } if(P17==0) { regi=regi-25.5; } EX0=1;//外部中断0打开 }