#include<reg51.h>
#include"Config.h"
#include"IOCfg.c"
#include"TimeDLY.h"
#include"ADC.h"

//從SPI總線讀2字節（16bits）數據函數：
//     SPI_Read_Two()   
INT16 SPI_Read_Two(void)
{
	INT16 temp;
	INT8U i;
	ADCSetSCLK(0);
	for(i=0;i<16;i++)
	{
		ADCSetSCLK(1);
		nNop(2);
		temp <<= 1;
		if(ADCDATA) temp++;
		ADCSetSCLK(0);
		nNop(2);
		}
	return(temp);
	}

//外部非連續數據時鐘，讀取上一次轉換數據且無同步信號模式函數：
//     EXCLKSample_Pre()
INT16 EXCLKSample_Pre(void)
{
	INT16 temp;
	ADCSetEXINT(1);
	ADCSetRC(1);
	ADCSetRC(0);
	while(ADCBUSY);
	nNop(2);
	ADCSetRC(1);
	temp = SPI_Read_Two();
	return(temp);
	}

//外部非連續數據時鐘，讀取當前次轉換數據且無同步信號模式函數：
//     EXCLKSample_Now()
INT16 EXCLKSample_Now(void)
{
	INT16 temp;
	ADCSetEXINT(1);
	ADCSetRC(1);
	ADCSetRC(0);
	while(ADCBUSY);
	nNop(1);
	ADCSetRC(1);
	while(!ADCBUSY);
	temp = SPI_Read_Two();
	return(temp);
	}

//外部非連續數據時鐘，讀取上一次轉換數據且有同步信號模式函數：
//     EXCLKSample_Pre_Syn()
INT16 EXCLKSample_Pre_Syn(void)
{
	INT16 temp;
	ADCSetEXINT(1);
	ADCSetSCLK(0);
	ADCSetRC(1);
	ADCSetRC(0);
	ADCSetSCLK(1);
	while(ADCBUSY);
	ADCSetSCLK(0);
	nNop(1);
	ADCSetRC(1);
	ADCSetSCLK(1);
	while(!ADCSYN);
	ADCSetSCLK(0);
	temp = SPI_Read_Two();
	return(temp);
	}

//外部非連續數據時鐘，讀取當前次轉換數據且有同步信號模式函數：
//     EXCLKSample_Now_Syn()
INT16 EXCLKSample_Now_Syn(void)
{
	INT16 temp;
	ADCSetEXINT(1);
	ADCSetSCLK(0);
	ADCSetRC(1);
	ADCSetRC(0);
	ADCSetSCLK(1);
	while(ADCBUSY);
	ADCSetSCLK(0);
	nNop(1);
	ADCSetRC(1);
	while(!ADCBUSY);
	ADCSetSCLK(1);
	while(!ADCSYN);
	ADCSetSCLK(0);
	temp = SPI_Read_Two();
	return(temp);
	}

//指定方式采樣以及讀取數據函數：nSample()
INT16 nSample(INT8U smode, INT8U sbtc)
{
	INT16 temp;
	ADCSetPWRD(PWOP);
	switch(sbtc)
	{
		case  BTC  :  ADCSetSBTC(BTC);  break;
		case  SBIN :  ADCSetSBTC(SBIN); break;
		default    :  break;
		}
	switch(smode)
	{
		case  EXDCLK_RDPRE  	:  temp = EXCLKSample_Pre(); 		break;
		case  EXDCLK_RDNOW  	:  temp = EXCLKSample_Now(); 		break;
		case  EXDCLK_RDPRE_SYN  :  temp = EXCLKSample_Pre_Syn();	break;
		case  EXDCLK_RDNOW_SYN  :  temp = EXCLKSample_Now_Syn(); 	break;
		default      			:  break;
		}
	return(temp);
	}