#include?“sst89e516.h“
#include“intrins.h“

#define?Ain1?0x00
#define?Ain2?0x01

sbit?sclk?=?P1^7;
sbit?drdy?=?P1^3;
sbit?din??=?P1^5;
sbit?dout?=?P1^6;
sbit?CS_AD7705?=?P1^4;

void?Writetoreg（unsigned?char?byteword）;
unsigned?int?Read_16bitdata（void）;
void?Init_AD7705（?unsigned?char?Channel?）;
unsigned?int?Average_Sample（unsigned?int?Num_Sample）;
void?Reset_AD7705（void）;

void?Writetoreg（unsigned?char?byteword）
{
	
	unsigned?char?i;

	while（?!drdy?）;
	sclk?=?1;
	CS_AD7705?=?0;
	
	for（i?=?0;?i?	{
		sclk?=?0;
		din?=?（bit）（byteword?&?0x80）;
		sclk?=?1;
		byteword?<<=?1;
	}

	CS_AD7705?=?1;	

}

unsigned?int?Read_16bitdata（void）
{
	
	unsigned?char?i;
	unsigned?int?Sample?=?0;

	while（?drdy?）;

	sclk?=?1;
	CS_AD7705?=?0;

	for（i?=?0;?i?	{
		Sample?<<=?1;
		sclk?=?0;		
		Sample?+=?（0x0001?&?（unsigned?int）dout）;
		sclk?=?1;
	}

	CS_AD7705?=?1;

	while（?!drdy?）;

	return?Sample;

}

void?Init_AD7705（?unsigned?char?Channel?）
{
	
	CS_AD7705?=?1;
	
	Writetoreg（0x21|Channel）;?/*?Active?Channel?is?Ain1（+）/Ain1（.）?next?operation?as?write?to?the?clock?register?*/
	Writetoreg（0x08）;?/*?master?clock?enabled?2.0000MHz?Clock（CLKDIV?=?1）?set?output?rate?to?200Hz*/
	Writetoreg（0x11|Channel）;?/*?Active?Channel?is?Ain1（+）/Ain1（.）?next?operation?as?write?to?the?setup?register?*/
	Writetoreg（0x7c）;?/*?gain?=?128?bipolar?mode?buffer?on?clear?FSYNC?and?perform?a?Self?Calibration*/	

}

unsigned?int?Average_Sample（unsigned?int?Num_Sample）
{
	
	unsigned?int?i;
	unsigned?long?int?result?=?0;

	for（i?=?0;?i?	{
//	?	Init_AD7705（）;
		Writetoreg（0x39）;
	?	result?+=?Read_16bitdata（）;
	}

	result?=?result?/?Num_Sample;

	return?（unsigned?int）result;
}

void?Reset_AD7705（void）
{
????unsigned?char?i;

	sclk?=?1;
????for（i?=?0;i?????{??
????????sclk?=?0;?
????????din?=?1;?
????????sclk?=?1;?
????}

}

?屬性????????????大小?????日期????時間???名稱
-----------?---------??----------?-----??----
?????目錄???????????0??2008-10-23?20:46??AD7705_V1.1（PERFECT）\
?????文件????????2985??2008-09-30?14:22??AD7705_V1.1（PERFECT）\max7219.c
?????文件????????1964??2008-10-24?05:15??AD7705_V1.1（PERFECT）\ad7705.c
?????文件????????7282??2008-10-29?08:33??AD7705_V1.1（PERFECT）\max7219.OBJ
?????文件????????3316??2008-10-29?08:38??AD7705_V1.1（PERFECT）\main.OBJ
?????文件????????1645??2008-10-29?08:29??AD7705_V1.1（PERFECT）\AD7705.Opt
?????文件??????????34??2008-10-29?08:38??AD7705_V1.1（PERFECT）\main.__i
?????文件????????1644??2008-10-29?05:41??AD7705_V1.1（PERFECT）\AD7705_Opt.Bak
?????文件???????????0??2008-09-30?14:19??AD7705_V1.1（PERFECT）\AD7705_Uv2.Bak
?????文件????????1278??2008-10-29?08:38??AD7705_V1.1（PERFECT）\main.c
?????文件????????2714??2008-10-29?08:38??AD7705_V1.1（PERFECT）\main.LST
?????文件???????17493??2008-10-29?08:38??AD7705_V1.1（PERFECT）\AD7705.M51
?????文件????????5203??2008-10-29?08:38??AD7705_V1.1（PERFECT）\AD7705.hex
?????文件?????????750??2008-10-29?08:33??AD7705_V1.1（PERFECT）\STARTUP.OBJ
?????文件????????4644??2008-10-29?08:33??AD7705_V1.1（PERFECT）\ad7705.OBJ
?????文件????????1917??2008-10-29?08:50??AD7705_V1.1（PERFECT）\AD7705.plg
?????文件????????4935??2008-10-29?08:33??AD7705_V1.1（PERFECT）\ad7705.LST
?????文件????????2255??2008-09-30?18:04??AD7705_V1.1（PERFECT）\AD7705.Uv2
?????文件???????14890??2008-10-29?08:38??AD7705_V1.1（PERFECT）\AD7705
?????文件????????6376??2008-10-29?08:33??AD7705_V1.1（PERFECT）\STARTUP.A51
?????文件???????10680??2008-10-29?08:33??AD7705_V1.1（PERFECT）\STARTUP.LST
?????文件????????5899??2008-10-29?08:33??AD7705_V1.1（PERFECT）\max7219.LST
?????文件??????????89??2008-10-29?08:38??AD7705_V1.1（PERFECT）\AD7705.lnp