dout.c

cygnal上的数据采集的程序（带实时时钟）

#include "Dout.h"
#include "C8051f.h"

void Dout(unsigned char out)
{
	unsigned char temp1;
	unsigned char temp2;
	unsigned char temp3;
	unsigned char temp4;

	temp1 = P1;
	temp2 = P4;

	temp1 = temp1 & 0x1f;
	temp2 = temp2 & 0xe0;

	temp3 = out & 0xe0;
	temp4 = out & 0x1f;

	P1 = temp1 | temp3;
	P4 = temp2 | temp4;	
}