ad.c

TCD1252扫描模块（在凌阳61单片机上的C程序）

#include "spce061a.h"
#include "MyBit.h"

void ADinit(void)
{
	unsigned int uiData;
	*P_ADC_MUX_Ctrl=C_ADC_CH1;						//初始化为通道1 A0
	*P_ADC_Ctrl= C_ADCE|C_VEXTREF_EN|C_2V_DIS;		//C_2V_DIS是允许2V输出
	     											//ADC enable , open extref, enable 2v output
 	uiData=*P_ADC_LINEIN_Data;    					//ADC start
 	AL_Atr=0;
}

unsigned int AD(unsigned int ADC_MUX)
{
	unsigned int uiData;			
	while(!(*P_ADC_MUX_Ctrl&0x8000));				//待AD转换完成才转换通道
	*P_ADC_MUX_Ctrl=ADC_MUX;		
	while(!(*P_ADC_MUX_Ctrl&0x8000));
	uiData=*P_ADC_LINEIN_Data;
	while(!(*P_ADC_MUX_Ctrl&0x8000));
	uiData=*P_ADC_LINEIN_Data;
	return((uiData&0xffc0)>>6);
}