奉上代码
#include
unsigned int long temp;
unsigned int long TemperF; //华氏温度
unsigned int long TemperC; //摄氏温度
char digit[10]={0X5F,0X50,0X3D,0X79,0X72,0X6B,0X6F,0X51,0X7F,0X7B};
void main(void) {
WDTCTL = WDTPW + WDTHOLD; //关闭系统看门狗
ADC12CTL0 = SHT0_8 + REFON + ADC12ON; //内部1.5V参考电压,打开ADC12模块,设置采样保持定时器
ADC12CTL1 = SHP; //采使用采样定时器
ADC12MCTL0 = SREF_1 + INCH_10; //参考电压和通道选择
ADC12IE = BIT0; //ADC12MEM0
ADC12CTL0 |= ENC; //允许转换
_BIS_SR(GIE); //开启系统中断
while(1) {
ADC12CTL0 |= ADC12SC; //开始采样并AD转换
//oF = ((x/4096)*1500mV)-923mV)*1/1.97mV = x*761/4096 - 468
//IntDegF = (ADC12MEM0 - 2519)* 761/4096
TemperF = (temp - 2519) * 761;
TemperF = TemperF / 4096; //简化的华氏温度转换公式
//oC = ((x/4096)*1500mV)-986mV)*1/3.55mV = x*423/4096 - 278
//IntDegC = (ADC12MEM0 - 2692)* 423/4096
TemperC = (temp - 2692) * 423;
TemperC = TemperC / 4096; //简化的摄氏温度转换公式
//LCDMEM[0]=digit[temp/1000];
//LCDMEM[1]=digit[(temp%1000)/100];
//LCDMEM[2]=digit[(temp%100)/10];
//LCDMEM[3]=digit[temp%10];
_NOP(); //加入断点可用来观察IntDegF和IntDegC结果
}
}
#pragma vector=ADC_VECTOR
__interrupt void ADC12ISR(void) {
temp = ADC12MEM0; //保存转换结果
}