temperature.c

用MSP430(C)写的红外抄表程序,是初学者好代码

/********************************************************************/
//模块功能：温度检测
//使用资源：
//调用的库文件：<MSP430X14X.h>
//作者：
//版权：
/*******************************************************************/
#include  <msp430x14x.h>

#define   Num_of_Results   12

static unsigned int Ch1results[Num_of_Results];  // Needs to be global in this
                                              // example. Otherwise, the
                                              // compiler removes it because it
                                              // is not used for anything.
const unsigned int  add_temp[11];

/******************************************************************************/
//模块功能：把采样到的AD转换成温度
//设计一个堆栈，进行两阶滤波器
/******************************************************************************/
void temp_main(void)    //AD转换数据处理程序
{
  unsigned char j;
  unsigned int a,c,d,i;
  long int b;
 for(j=0;j<11;j++)            //0通道五次结果排序
  {
   i = j + 1 ;      
  for(;i<12;i++)   
  {
    if(Ch1results[j] > Ch1results[i])
    {
     a = Ch1results[j]; 
     Ch1results[j] = Ch1results[i];
     Ch1results[i] = a;
    }
  }
  }

     i = Ch1results[2]%8;
     Ch1results[2] /=8;
     j = i;
     i = Ch1results[3]%8;
     Ch1results[3] /=8;
     j = i + j;
     i = Ch1results[4]%8;
     Ch1results[4] /=8;                      //求取平均值
     j = i + j;
      i = Ch1results[5]%8;
     Ch1results[5] /=8;
     j = i + j;
     i = Ch1results[6]%8;
     Ch1results[6] /=8;                      //求取平均值
     j = i + j;
      i = Ch1results[7]%8;
     Ch1results[7] /=8;
     j = i + j;
     i = Ch1results[8]%8;
     Ch1results[8] /=8;                      //求取平均值
     j = i + j;
     i = Ch1results[9]%8;
     Ch1results[9] /=8;
     j = i + j;
     i = j/8;
     Ch1results[0] =  Ch1results[2] + Ch1results[3] + Ch1results[4] + Ch1results[5] + Ch1results[6] + Ch1results[7] + Ch1results[8] + Ch1results[9] + i;
    
     i = Ch1results[0];
     b = (long int)i*0x190*0x64;//1d6,470K;186,390k;190,400k;
     i = Ch1results[0];
     a = 0xfffe - i;//Rx = (400*i*100)/(0Xfffe-i)
     c = b/a;       //c是需要的电阻值
          for(i=1;i<11;i++)
     {
       if(c>add_temp[i])
       {
         b = (long int)(add_temp[i-1]-c)*0x64;//计算温度
        
         a = slop[i-1];   //y = (b-x)/k
         c = (int)(b/a);

         d = 5*(i-1);
         c = c + 100*d;
         pass_temp = c;
         a = c%100;   //温度小数部分
         b = c/100;
        
         i = 100;
       }
     }
      
     c = b/10;
     b = b%10;
     i = a%10;
     a = a/10;
     if(i>5)
     {
       a +=1;
     }
     if(a>9)
     {
       b +=1;
       a = 0;
     }
      if(b>9)
     {
       c +=1;
       b = 0;
     }
    // while(1);
     Ch1results[0] = c;
     Ch1results[1] = b;
     Ch1results[2] = a; 
     
     i = a;
     a = c;
     c = i;
     LCDM10 &= 0xef;
     LCDM13 &= 0xef;
     LCDM11 &= 0x10;            //显示相应的BCD码
     if(a!=0)
     {
     LCDM11 = LCDNUM2[a];
     }
     LCDM10 &= 0x10;
     if((b!=0)||(a!=0))
     {
     LCDM10 = LCDNUM2[b];
     }
     LCDM9 &= 0x10;
     LCDM9 = LCDNUM2[c];
     LCDM9 |= 0x10;
    
  }


/******************************************************************************/
//模块功能：初始化AD控制寄存器
/******************************************************************************/
void init_AD(void)
{
  WDTCTL = WDTPW+WDTHOLD;                   // Stop watchdog timer
  P6SEL |= 0x01;                            // Enable A/D channel A0
  ADC12CTL0 = ADC12ON+SHT0_8+MSC;           // Turn on ADC12, set sampling time
  ADC12CTL1 = SHP+CONSEQ_2;                 // Use sampling timer, set mode
  ADC12IE = 0x01;                           // Enable ADC12IFG.0
  ADC12CTL0 |= ENC;                         // Enable conversions
  ADC12CTL0 |= ADC12SC;                     // Start conversion
  //_BIS_SR(LPM0_bits + GIE);                 // Enter LPM0,Enable interrupts
}

/*****************************************************************************/
//模块功能：采集AD转换值
/*****************************************************************************/
#pragma vector=ADC_VECTOR
__interrupt void ADC12ISR (void)
{
  static unsigned int index = 0;

  Ch1results[index] = ADC12MEM0;               // Move Ch1results
  index = (index+1)%Num_of_Results;         // Increment Ch1results index, modulo
}

const unsigned int  add_temp[11] = {0x82aa,0x654a,0x4f10,0x3e26,0x3124,0x2710,0x1f57,0x194d,0x148c,
                            0x10c3,0xdc8}; //室温对应的温度 470K