max261.c

提供数控电位器MAX261的KEIL控制程序

#include"stdafx.h"

#define ADDR(address) {A0=(bit)((address) & 0x01);A1=(bit)((address) & 0x20);A2=(bit)((address) & 0x40);A3=(bit)((address) & 0x80);}
#define MData(ddata) {D0=((ddata) & 0x01);D1=((ddata) & 0x20);}
 
sbit Max26xWR=P1^7;
sbit A0=P1^0;
sbit A1=P1^1;
sbit A2=P1^2;
sbit A3=P1^3;
sbit D0=P1^4;
sbit D1=P1^5;

void SetNum(uchar value,uchar addre);

void Config(uchar Mode,uchar FreRate,uchar Q);

void main(void)
	{
	 Config(0,0,0x26);
	 while(1);

	}
	
void Config(uchar Mode,uchar FreRate,uchar Q)
	{
	SetNum(Mode,0);
	SetNum(((FreRate) & 0x03),1);
	SetNum(((FreRate>>2) & 0x03),2);
	SetNum(FreRate>>4,3);
	SetNum(((Q<<1)&0x03),4);
	SetNum(((Q>>1) & 0x03),5);
	SetNum(((Q>>3) & 0x03),6);
	SetNum((Q>>5) ,7);

	}
	
void SetNum(uchar value,uchar addre)
	{
	Max26xWR=1;
	ADDR(addre)
	MData(value)
	Max26xWR=0;
	_nop_(); _nop_();_nop_();
	Max26xWR=1;
	}