adc.c

C51源码.其内文件包含spi

void  ADCInit()
{
	AMX0CF = 0x00;		//通道设置为单端输入模式
	AMX0SL = 0x0F;		//选择通道7
	ADC0CF = 0xf8;		//设置采样转换时钟周期

	ADC0CN = 0xD0;		//采样控制使能
}
void ADC_Start(BYTE CHAN)
{
	AMX0SL = CHAN;	    //选择通道7
	ADC0CN &= 0xDF;		//清除中断控制位
	ADC0CN |= 0x10;		//启动采样转换	
}
/*
uint ReadADC()
{
	byte DatL,DatH;

	DatL = ADC0CN;
	if(DatL&0x20)
	{
		DatL = ADC0L; 
		DatH = ADC0H; 
	}
	ADC0CN &= 0xDF;

	return(DatH*256+DatL);
}
*/
uint TempCount(uint temp)
{
//	uint dat;
//	ulong ch;
	float  a,b,c; 
	temp/=4;
	a = 0.776*1024.0/3.3;
	b = 0.00286*1024.0/3.3;
	//dat = 0.776*1024/3.3 = 241;
	//ch = 0.00286*1024.0/3.3= 0.887;
	a += (b*22);
	c = temp;
	c -= a;
	//c *= 10;
	c /= b;

	return (uint)c;
}

void PADCGgatherInt() interrupt 15
{
	AdDat.Byt.Li= ADC0L;
	AdDat.Byt.Hi = ADC0H;
	ADC0CN &= 0xDF;

	AdcBuff[CHAN][adcbufCnt]=AdDat.Dat;
	
	CHAN++;
	
	if(CHAN<8)		ADC_Start(CHAN);
	//else	  		CHAN = 0;
}