PeMod_UV370.cpp

00001 #include "SysConfig.h"
00002 
00003 #define UV_LV_MAX   11
00004 #define UV_SMP_AVG  5
00005 const int UvLvTable[] = {50, 227, 318, 408, 503, 606, 696, 795, 881, 976, 1079, 1170};
00006 
00007 #define i2c_uv i2c_sen
00008 //#define uart_db uart_pc
00009 
00010 int UV_Init(void)
00011 {
00012     return 0;    
00013 }
00014 
00015 float UV_ReadVolt(void)
00016 {    
00017     return(adc_ch10.read() * 3300);
00018 }
00019 
00020 float UV_ReadLv(void)
00021 {
00022     int i;
00023     float volt = 0, level;
00024     for(i=0; i<UV_SMP_AVG; i++)
00025         volt += UV_ReadVolt();
00026     volt = volt / UV_SMP_AVG ;
00027     
00028     if(volt < (float)UvLvTable[0])
00029     {
00030         level = 0;  
00031         return level;
00032     }
00033     
00034     if(volt > (float)UvLvTable[UV_LV_MAX])
00035     {
00036         level = 11;
00037         return level;
00038     }
00039     
00040     for(i=0; i<UV_LV_MAX; i++)
00041     {
00042         if(volt > (float)UvLvTable[i] && volt < (float)UvLvTable[i+1])
00043         {
00044             level = i + (volt - UvLvTable[i]) / (UvLvTable[i+1] - UvLvTable[i]);
00045             return level;
00046         }
00047     }
00048     
00049     return -1;
00050 }