求AD转换C语言范例

unsigned long ad_temp;
void main()
{
_acsr=0x01;
_adcr=0x21;
_start=0;
_start=1;
_start=0;
while(_eoc);
*((unsigned char *)&ad_temp+1)=_adrh;
*((unsigned char *)&ad_temp+0)=_adrl;
//ad_temp移位
_nop();
}