BMS_Slave/ProjectSource/BMS_Slave_RCT/BMS_NTC28.c

/*********************************************************************
 *
 *                  NTC28 C File
 *
 *********************************************************************
 * FileName:        NTC28.c
 * Processor:       PIC18F45K80
 * Complier:        Microchip C18 v3.41
 * Company:         KIT - CN - IPE
 *
 * Author           Date         Comment
 *~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 * Ott W.           01.06.2016   Release 1.
 *********************************************************************/

#include "BMS_Slave.h"



/*********************************************************************
*
*                             Globals
*
*********************************************************************/
/* Look Up Table für NTC103JT-025-3P Temperaturbestimmung von -50°C bis +90°C in 1°K Schritten */
const rom int16_t NTC_LookUp[142]=                         /*!e950*/
   {4511,4503,4496,4488,4479,4470,4461,4452,4441,4431,
    4420,4408,4396,4383,4370,4356,4342,4327,4311,4295,
    4278,4261,4242,4223,4204,4183,4162,4140,4118,4095,
    4071,4046,4020,3993,3965,3937,3908,3878,3847,3816,
    3784,3751,3717,3682,3647,3611,3574,3537,3499,3461,
    3422,3382,3341,3300,3259,3217,3175,3132,3090,3046,
    3002,2959,2914,2870,2825,2781,2736,2691,2647,2603,
    2558,2513,2469,2425,2381,2337,2293,2250,2206,2164,
    2121,2079,2037,1996,1955,1914,1875,1835,1796,1758,
    1720,1683,1646,1610,1574,1539,1505,1471,1438,1405,
    1373,1342,1311,1280,1250,1221,1193,1165,1137,1110,
    1084,1059,1034,1009,985,962,939,916,895,873,
    853,832,812,793,774,756,738,720,703,686,
    670,654,638,623,608,594,580,566,553,539,
    527,515};



/*********************************************************************
 * Function:        int8_t LTC_CONV_UMESS_2_TEMP( int16_t Umess )
 *
 * Overview:        Use this function to convert Umess 2 Temperature
 *                  for Temperature Sensor  103JT-025-3P
 *
 * PreCondition:    None
 *
 * Input:           Voltage [mV]  [0..5000mV]
 *
 * Output:          Temperature [°C]   [-50°C..+90°C]
 *                  -51°C = Underflow; +91°C = Overflow
 *
 * Side Effects:    None
 **********************************************************************/
int8_t LTC_CONV_UMESS_2_TEMP( int16_t Umess )
{
  int8_t  Temp = -51;
  uint8_t i = 0;
  
  if(Umess < 516)                       /* OverFlow (>90°C) */
  {
     Temp = 91;                         /* Break Search */
  }
  else
  {
    while((NTC_LookUp[i] >= Umess))
    {
      i++;
      Temp++;
    }
  }
  return Temp;
}