外部温度传感器 

 1   unsigned const int tempvoltage[]={
 2  0xC42,0xC1C,0xBF5,0xBCE,0xBA5,0xB7D,0xB53,0xB29,0xAFE,0xAD3,
 3  0xAA8,0xA7C,0xA4F,0xA23,0x9F5,0x9C8,0x99B,0x96D,0x93F,0x911,
 4  0x8E4,0x8B6,0x888,0x85B,0x82D,0x800,0x7D3,0x7A7,0x77A,0x74E,
 5  0x723,0x6F8,0x6CD,0x6A3,0x67A,0x651,0x629,0x601,0x5DA,0x5B3,
 6  0x58D,0x568,0x544,0x520,0x4FD,0x4DB,0x4B9,0x498,0x478,0x459,
 7  0x43A,0x41C,0x3FF,0x3E2,0x3C6,0x3AB,0x390,0x376,0x35D,0x345,
 8  0x32D
 9  };
10  //这里是NTC表中的AD值0~60度
11 
12 u16 Get_Adc_Average(u8 ch,u8 times) //采集ad值
13 {
14     u32 temp_val=0;
15     u8 t;
16     for(t=0;t<times;t++)
17     {
18         temp_val+=Get_Adc(ch);
19         delay_ms(5);
20     }
21     return temp_val/times;
22 }      
23 
24 
25 
26 u8 Compare_tempvol(u16 Vol) //vol来自于上面函数
27 { 
28      u8 cmp_cnt; 
29      cmp_cnt =0; 
30      while(Vol<tempvoltage[cmp_cnt]) 
31      { 
32       cmp_cnt++; 
33       if(cmp_cnt>59) 
34       break; 
35      } 
36      return cmp_cnt; 
37 }

 1 if(temperature<0x32D || temperature>0xC42) //判断ad值得范围         3 
 4                 printf("\r\nflagerror\r\n\r\n");                
 5 
 6         }
 7 
 8         else
 9         {
10                 adcx= Compare_tempvol(temperature); 
11 
12                 printf("\r\nAD值=%d\r\n",adcy);                
13                 printf("\r\n温度=%d\r\n",adcx);

通过NTC表来的到温度值。

最后结果为：

posted on 2017-08-09 11:44  zengsf  阅读(528)  评论(0)  编辑  收藏  举报

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