add.c

这里有很多我自己做的凌阳单片机源程序

#include<spce061a_chf.h>
unsigned int AD(void);
int main()
{
	unsigned long int uiData;
	unsigned int i;
	
    float   fVoltage,test;
	fVoltage=0.0;					
    test=0.0;
  
   
    *P_IOA_Dir &= 0x0000;					
	*P_IOA_Attrib |= 0x0001;
	*P_IOA_Data &= 0x0000;//初始化IOA0为悬浮式输入。
    
   

	Set_ADC_MUX_Ctrl(0x0001);//选择通道1（IOA0)
	Set_ADC_Ctrl(0x0001);//允许AD转换

	uiData=Get_ADC_LineIn_Data();//通过读取P_ADC_LINEIN_Data积存器的值启动AD转换
	uiData=0;
	while(1)
	{
		for(i=0;i<16;i++)
		{
		*P_Watchdog_Clear=0x0001;
			uiData+=AD();
	 
		}
		uiData>>=4;
		fVoltage=(float)uiData/0xffc0*3.3;//表示外接0-3.3的电压
		test=((fVoltage/0.0165)+40);		
		asm("nop");
	}   
}

unsigned int AD()
{
	unsigned int uiData;
	while(!(Get_ADC_MUX_Ctrl()&0x8000));
	uiData=Get_ADC_LineIn_Data();
	return(uiData&0xffc0);
}