dac0832.c

用0832做的一个波形发生器

#include <reg51.h>
#include <intrins.h>
#include<ABSACC.H>  	
#define uchar unsigned char
#define  data_OUT  XBYTE[0x7FFF]
char code dat[]={0x80,0x83,0x86,0x89,0x8d,0x90,0x93,0x96,0x99,0x9c,0x9f,0xa2,0xa5,0xa8
                  ,0xab,0xae,0xb1,0xb4,0xb7,0xbc,0xbf,0xc2,0xc5,0xc7,0xca,0xcc,0xcf,0xd1,
0xd4,0xd6,0xd8,0xda,0xdd,0xdf,0xe1,0xe3,0xe5,0xe7,0xe9,0xea,0xec,0xee,0xf1,
0xf2,0xf4,0xf5,0xf6,0xf7,0xf8,0xf9,0xfa,0xfa,0xfb,0xfc,0xfd,0xfd,0xfe,0xff,
0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xfe,
0xfd,0xfd,0xfc,0xfb,0xfa,0xf9,0xf8,0xf7,0xf6,0xf5,0xf4,0xf3,0xf2,0xf1,0xef,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,0x5d,0x5a,0x57,0x55,0x51,0x4e,0x4c,0x48,0x45,0x43,0x40,0x3d,0x3a,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};
bit flag=0;
  void delay(unsigned  int N)  
  {
  int i; 
  for(i=0;i<N;i++);
  }

void conversion_once_0832(unsigned char out_data)
           {
           data_OUT=out_data; //输出数据
           delay(10);         //延时等待转换
            }
uchar  keyscan()
{
 uchar key;
 if(P1!=0xff)
  {
   delay(61);
   key=P1;
   if(key!=0xff)
    flag=~flag;
    return(key);
  }

}
void triangle()
{
  uchar k;
  for(k=0;k<255;k++)
    conversion_once_0832(k);
  for(;k>0;k--)
     conversion_once_0832(k);
}
void pulse()
{
 conversion_once_0832(0xff);
 delay(1000);
 conversion_once_0832(0x00);
 delay(1000);

}
void fun3()
{
  uchar j;
  for(j=0;j<255;j++)
   conversion_once_0832(j);
}
void fun4()
{
 uchar i;
 for(i=0;i<255;i++)
   {
    conversion_once_0832(dat[i]);
   }
}
void main()
{
 uchar temp; 
 while(1)
  {
   temp=keyscan();
   switch(temp)
     {
	   case 0xfe: 
	             do{
				    triangle();
					}while(keyscan()&&(flag==1));break;
	   case 0xfd: do{
				    pulse();
					}while(keyscan()&&(flag==1));break;
	   case 0xfb: do{
				    fun3();
					}while(keyscan()&&(flag==1));break;
       case 0xf7: do{
				    fun4();
					}while(keyscan()&&(flag==1));break;
	   default: break;
	 }
  }
 
}