每次返回的result的值都不变

1万 · 2013-11-3 12:22

unsigned int ADC_Convert(void)
{       unsigned int result,temp1,temp2;
      ADCDH=0;
      ADCDL=0;
      ADCON0= 0x80;
   delayms(1);
      ADCFG0 = 0x12;       /*全速模式*/
      ADCON0|= 0x08;
   while ((ADCON0 & 0x10) == 0 ); /*转换完成，ADC硬件会自动清除ADCS并且ADCI置位。ADCS或ADCI为”1”时将不会开始新的A/D转换。 */
   ADCON0 &= 0xE7;
      temp1=ADCDH;
      temp2=ADCDL;
      result = (temp1<<8) + temp2;
      return(result);
}