#include <stdio.h>
#include <absacc.h>
#include <intrins.h>
#include <./Atmel/at89x52.h>
#include "source.h"
unsigned int Mv_To_Dat(unsigned int mv){
	#define Vref_2times   5 
	unsigned int dat;
	dat=mv*(1024/5);
	dat &=0x3ff;//10 bits is vaild.
	return dat;
}
void Spi_Write(unsigned int dat){
	unsigned char i;
	TLC_NCS=0;
	TLC_CLK_SET;
	for(i=0;i<16;i++){
		TLC_DIN=((dat&0x8000)>0)?1:0;
		TLC_CLK_PULSE;
		dat<<=1;
	}
	TLC_CLK_SET;
	TLC_NCS=1;
}
#define SLOW_MODE         0X4000
#define FAST_MODE         0X0000
#define NORMAL_POWER_MODE 0X0000
#define SAVE_POWER_MODE   0X2000
void WriteA_RefreshB( unsigned int mv){/*通道A和B的模擬電壓同時更新*/
	unsigned int dat;
	dat=Mv_To_Dat(mv);
	dat <<=2;
	dat |=FAST_MODE|NORMAL_POWER_MODE|0x8000;
	Spi_Write(dat);

}
void WriteB_DoubleBuf( unsigned int mv){/*寫通道B和雙緩沖寄存器*/
	unsigned int dat;
	dat=Mv_To_Dat(mv);
	dat <<=2;
	dat |=FAST_MODE|NORMAL_POWER_MODE|0x0000;
	Spi_Write(dat);	
}
void Write_DoubleBuf( unsigned int mv){/*僅寫雙緩沖寄存器*/
	unsigned int dat;
	dat=Mv_To_Dat(mv);
	dat <<=2;
	dat |=FAST_MODE|NORMAL_POWER_MODE|0x0001;
	Spi_Write(dat);
}
void Refresh_Two_Volt(unsigned int chla_mv,unsigned int chlb_mv){/*同時更新通道A和通道B的模擬電壓值*/
	Write_DoubleBuf(chlb_mv);/*先寫雙緩沖寄存器的值，其對應的是通道B的電壓*/
	WriteA_RefreshB(chla_mv);/*寫通道A的電壓，同時把雙緩沖的電壓值更新到B通道*/
													 /*這就達到了同時更新兩路電壓的目的*/
}
void Refresh_ChlA_Volt(unsigned int mv){/*只更新A的模擬電壓*/
		WriteA_RefreshB(mv);/*因為雙緩沖寄存器的值沒有改*/
		                    /*所以這是只更新通道A的模擬電壓*/
}
void Refresh_ChlB_Volt(unsigned int mv){/*只更新B的模擬電壓*/
		WriteB_DoubleBuf(mv);/*此命令更新通道B的模擬電壓值*/
		                     /*同時寫雙緩沖的值，這樣就可以在更新其他通道時使用雙緩沖寄存器中的值了，不會改變通道B的電壓了*/
}
main()
{
	unsigned int  chl_bmv,chl_amv;
	unsigned int  i;
	IE=0X40;
	EA=1;       /* Enable interrupts */
	chl_bmv=1000;/*1伏電壓*/
	chl_amv=2000;/*2伏電壓*/
	i++;
	if(i==10000){
		chl_amv=1000;//1V
		Refresh_ChlA_Volt(chl_amv);
	}
	else if(i==20000){
			chl_bmv=2000;//2v
			Refresh_ChlB_Volt(chl_bmv);
	}
	else if(i==30000){
		i=0;
		chl_bmv=3000;//3v
		Refresh_Two_Volt(chl_amv,chl_bmv);
	}
}