unsigned int sample1(int channel)
{
switch(channel)
{ case 0: P6SEL |= BIT0; break; //A0
case 1: P6SEL |= BIT1; break; //A1
case 2: P6SEL |= BIT2; break;
case 3: P6SEL |= BIT3; break;
case 4: P6SEL |= BIT4; break;
case 5: P6SEL |= BIT5; break;
case 6: P6SEL |= BIT6; break;
case 7: P6SEL |= BIT7; break; //A7
default:P6SEL |= BIT0;
}
ADC12CTL0 = ADC12ON + SHT0_2 +REF2_5V;//2.5V内部参考电压
ADC12CTL1 = SHP; //采样信号来源采样定时器
ADC12MCTL0 =(unsigned char)channel; //VR+=VREF+,VR-=AVss
ADC12CTL0 |= ENC; //使能
ADC12CTL0 |= ADC12SC; //开始采样转换
while((ADC12IFG & BIT0)==0);
return (unsigned int)(ADC12MEM0);
}
unsigned int sample2(int channel)
{
switch(channel)
{ case 0: P6SEL |= BIT0; break; //A0
case 1: P6SEL |= BIT1; break; //A1
case 2: P6SEL |= BIT2; break;
case 3: P6SEL |= BIT3; break;
case 4: P6SEL |= BIT4; break;
case 5: P6SEL |= BIT5; break;
case 6: P6SEL |= BIT6; break;
case 7: P6SEL |= BIT7; break; //A7
default:P6SEL |= BIT0;
}
ADC12CTL0 = ADC12ON + SHT0_2 +REF2_5V;//2.5V内部参考电压
ADC12CTL1 = SHP; //采样信号来源采样定时器
ADC12MCTL0 =SREF_2+(unsigned char)channel; //Vr+=VeEF+,Vr-=AVss
ADC12CTL0 |= ENC; //使能
ADC12CTL0 |= ADC12SC; //开始采样转换
while((ADC12IFG & BIT0)==0);
return (unsigned int)(ADC12MEM0);
}
#include
#include "ADC12.c"
void main(void)
{
WDTCTL = WDTPW + WDTHOLD; // Stop WDT
P5DIR |= 0x02; // P5.1 output
for (;;)
{
if(sample1(1)<120)
P5OUT &= ~0x02;
else P5OUT |= 0x02;
}
}
// ADC12 interrupt service routine
#pragma vector=ADC12_VECTOR
__interrupt void ADC12_ISR (void)
{
if (ADC12MEM0 < 120)
P5OUT &= ~0x02; // Clear P5.1 LED off
else
P5OUT |= 0x02; // Set P5.1 LED on
_BIC_SR_IRQ(CPUOFF); // Clear CPUOFF bit from 0(SR)
}
这么久了，还请采纳，俺可是付出的啊
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