msp430 adc12 ntc热敏电阻温度测试求助

2019-07-27 17:07发布

//热敏电阻检测函数
unsigned int ADC_Ntc_Detect( )
{
unsigned int data16;

P6SEL = 0x04;
ADC12CTL0 = ADC12ON + ADC12SHT0_2;
ADC12CTL1 = ADC12CSTARTADD1 + ADC12SHP;
ADC12MCTL2 = ADC12INCH_2;
ADC12IE = 0x04;
ADC12CTL0 |= ADC12ENC+ADC12SC;
_EINT();

while(adc_sign!='o');
adc_sign = 0;
data16 = adc_data2;

return data16;
}

//中断函数
#pragma vector=ADC12_VECTOR
__interrupt void ADC12ISR (void)
{
switch(__even_in_range(ADC12IV,34))
{
case  0: break;                         // Vector  0:  No interrupt
case  2: break;                         // Vector  2:  ADC overflow
case  4: break;                         // Vector  4:  ADC timing overflow
case  6: break;                         // Vector  6:  ADC12IFG0
case  8: break;                         // Vector  8:  ADC12IFG1
case 10:
      adc_data2 = ADC12MEM2;
      adc_sign='o';                      //adc_sign 全局变量
      break;                                  // Vector 10:  ADC12IFG2
case 12: break;                         // Vector 12:  ADC12IFG3
case 14: break;                         // Vector 14:  ADC12IFG4
case 16: break;                         // Vector 16:  ADC12IFG5
case 18: break;                         // Vector 18:  ADC12IFG6
case 20: break;                         // Vector 20:  ADC12IFG7
case 22: break;                         // Vector 22:  ADC12IFG8
case 24: break;                         // Vector 24:  ADC12IFG9
case 26: break;                         // Vector 26:  ADC12IFG10
case 28: break;                         // Vector 28:  ADC12IFG11
case 30: break;                         // Vector 30:  ADC12IFG12
case 32: break;                         // Vector 32:  ADC12IFG13
case 34: break;                         // Vector 34:  ADC12IFG14
default: break;
}

}

P6.2-----TEMP_ADC2 如图
小Q截图-20150413000637.png