dac0832.h

使用DAC0832做的程控衰减器

#ifndef DAC0832_H
#define DAC0832_H

#include <absacc.h>
#include <reg52.H>
#include <math.h>

#define INPUT1 XBYTE[0x9000]
#define INPUT2 XBYTE[0xa000]
#define DACR   XBYTE[0xd000]
#define sineSize 628
/*
unsigned char code sine[628]={
127,128,130,131,132,133,135,136,137,138,140,141,142,144,145,146,147,149,150,151,
152,154,155,156,157,159,160,161,162,163,165,166,167,168,170,171,172,173,174,175,
177,178,179,180,181,182,184,185,186,187,188,189,190,191,193,194,195,196,197,198,
199,200,201,202,203,204,205,206,207,208,209,210,211,212,213,214,215,216,217,218,
218,219,220,221,222,223,224,224,225,226,227,228,228,229,230,231,231,232,233,234,
234,235,236,236,237,238,238,239,239,240,241,241,242,242,243,243,244,244,245,245,
246,246,247,247,248,248,248,249,249,250,250,250,251,251,251,251,252,252,252,252,
253,253,253,253,253,254,254,254,254,254,254,254,254,254,254,254,254,254,254,254,
254,254,254,254,254,254,254,254,254,254,253,253,253,253,253,252,252,252,252,251,
251,251,251,250,250,250,249,249,248,248,248,247,247,246,246,245,245,244,244,243,
243,242,242,241,241,240,240,239,238,238,237,236,236,235,234,234,233,232,232,231,
230,229,229,228,227,226,225,225,224,223,222,221,220,219,219,218,217,216,215,214,
213,212,211,210,209,208,207,206,205,204,203,202,201,200,199,198,197,196,195,194,
193,192,191,189,188,187,186,185,184,183,181,180,179,178,177,176,174,173,172,171,
170,169,167,166,165,164,162,161,160,159,158,156,155,154,153,151,150,149,148,146,
145,144,142,141,140,139,137,136,135,134,132,131,130,128,127,126,125,123,122,121,
120,118,117,116,114,113,112,111,109,108,107,106,104,103,102,101,99,98,97,96,
94,93,92,91,90,88,87,86,85,83,82,81,80,79,78,76,75,74,73,72,
71,69,68,67,66,65,64,63,62,61,59,58,57,56,55,54,53,52,51,50,
49,48,47,46,45,44,43,42,41,40,39,38,37,37,36,35,34,33,32,31,
31,30,29,28,27,26,26,25,24,23,23,22,21,21,20,19,18,18,17,17,
16,15,15,14,13,13,12,12,11,11,10,10,9,9,8,8,7,7,6,6,
6,5,5,5,4,4,4,3,3,3,2,2,2,2,1,1,1,1,1,0,
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
0,0,0,0,1,1,1,1,1,2,2,2,2,3,3,3,3,4,4,4,
5,5,5,6,6,7,7,8,8,8,9,9,10,10,11,12,12,13,13,14,
14,15,16,16,17,17,18,19,19,20,21,22,22,23,24,25,25,26,27,28,
28,29,30,31,32,33,34,34,35,36,37,38,39,40,41,42,43,44,45,46,
47,48,49,50,51,52,53,54,55,56,57,58,59,60,61,62,63,64,66,67,
68,69,70,71,72,73,75,76,77,78,79,81,82,83,84,85,87,88,89,90,
91,93,94,95,96,98,99,100,101,103,104,105,106,108,109,110,111,113,114,115,
116,118,119,120,121,123,124,125};
*/
void DAC2B(unsigned char data1,unsigned char data2) {
	INPUT1=data1;
	INPUT2=data2;
	DACR=0;
}
/*
void DACCH1(unsigned char dat) {
	INPUT1=dat;
	DACR=0;
}

void DACCH2(unsigned char dat) {
	INPUT2=dat;
	DACR=0;
}

void XY() {
	unsigned char j;
	unsigned int i;
	i=j=0;
	while (1) {
		DAC2B(sine[i],j);
		i++;i%=628;
		j++;
	}
}

void Stair(unsigned char ch) {
	unsigned char i;
	void (*CHANNEL)(uchar);
	if (ch==1)CHANNEL=DACCH1;
	if (ch==2)CHANNEL=DACCH2;
	while(1) {
		for (i=0; i<=255;i++) {
			CHANNEL(i);
		}
	}
}

void SineFunc(unsigned char ch) {
	unsigned int i;
	void (*CHANNEL)(uchar);
	if (ch==1)CHANNEL=DACCH1;
	if (ch==2)CHANNEL=DACCH2;
	while (1) {
		for (i=0;i<628;i++)
			DAC2B(sine[i],sine[i]);
	}
}
*/
#endif