#include <reg52.H>
#include "Typedef.H"
#include "UserDef.H"

/*  端口定義 */
sbit LTC1860_clk = P3^6 ;
sbit LTC1860_conv = P3^7;
sbit LTC1860_do = P3^5;


/***************************************
	AD轉換函數
****************************************/
INT16U LTC1860(void)
	{
	INT16U ad;
	INT8U i;

	LTC1860_clk = 1;
	LTC1860_conv = 0;  				/* 片選 */
	LTC1860_do = 1;
	ad = 0;     			

	LTC1860_conv = 1;
	for (i=0;i<100;i++)
		{}

	LTC1860_conv = 0;

	for (i=0; i<12; i++) 
	{
		LTC1860_clk = 0;  		/*產生時鐘信號*/

		LTC1860_clk = 1;

        ad = (ad<<1)|LTC1860_do; /*接收輸出的轉換結果*/

    }


	return(ad);
}