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int16 BME280ReadS16(int8 address)
{
    return ((signed int16)BME280Read16(address));
}

unsigned int16 BME280Read16_LE(int8 address)
{
    unsigned int16 temp;
    temp = BME280Read16(address);
    temp = (temp >> 8) | (temp << 8);
    return (unsigned int16)temp;
}
signed int16 BME280ReadS16_LE(int8 address)
{
    return (signed int16)BME280Read16_LE(address);
}

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float var1, var2, p;

var1 = ((float)FCL_TFINE/2.0) - 64000.0;
var2 = var1 * var1 * ((float)FCL_P6) / 32768.0;


var2 = var2 + var1 * ((float)FCL_P5) * 2.0;
var2 = (var2/4.0)+(((float)FCL_P4) * 65536.0);
var1 = (((float)FCL_P3) * var1 * var1 / 524288.0 + ((float)FCL_P2) * var1) / 524288.0;
var1 = (1.0 + var1 / 32768.0)*((float)FCL_P1);

if (var1 == 0.0)
   {
   //return 0; // avoid exception caused by division by zero
}
p = 1048576.0 - (float)FCL_ADC_P;
p = (p - (var2 / 4096.0)) * 6250.0 / var1;

var1 = ((float)FCL_P9) * p * p / 2147483648.0;
var2 = p * ((float)FCL_P8) / 32768.0;
p = p + (var1 + var2 + ((float)FCL_P7)) / 16.0;

return p/100;

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signed long int var1, var2;
unsigned long int p;

var1 = (((signed long int)FCL_TFINE)>>1) - (signed long int)64000;
var2 = (((var1>>2) * (var1>>2)) >> 11) * ((signed long int)FCL_P6);
var2 = var2 + ((var1*((signed long int)FCL_P5))<<1);
var2 = (var2>>2)+(((signed long int)FCL_P4)<<16);
var1 = (((FCL_P3 * (((var1>>2)*(var1>>2)) >> 13)) >>3) + ((((signed long int)FCL_P2) * var1)>>1))>>18;
var1 = ((((32768+var1))*((signed long int)FCL_P1))>>15);
if (var1 == 0)
{
    return 0;
}    
p = (((unsigned long int)(((signed long int)1048576)-FCL_ADC_P)-(var2>>12)))*3125;
if(p<0x80000000)
{
   p = (p << 1) / ((unsigned long int) var1);   
}
else
{
   p = (p / (unsigned long int)var1) * 2;    
}
var1 = (((signed long int)FCL_P9) * ((signed long int)(((p>>3) * (p>>3))>>13)))>>12;
var2 = (((signed long int)(p>>2)) * ((signed long int)FCL_P8))>>13;
p = (unsigned long int)((signed long int)p + ((var1 + var2 + FCL_P7) >> 4));
return p/100;

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var1 = ((((signed long int)FCL_P3 * (((var1>>2)*(var1>>2)) >> 13)) >>3) + ((((signed long int)FCL_P2) * var1)>>1))>>18;

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signed long int temp1, temp2;
temp1 = (((signed long int)FCL_P3 * (((var1>>2)*(var1>>2)) >> 13)) >>3);
temp2 = ((((signed long int)FCL_P2) * var1)>>1);
var1 = (temp1+temp2)>>18;

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var1 = (((signed long long int)FCL_TFINE)>>1) - (signed long long int)64000;
//….
temp1 = (((signed long long int)FCL_P3 * (((var1>>2)*(var1>>2)) >> 13)) >>3);
temp2 = ((((signed long long int)FCL_P2) * var1)>>1);
var1 = (temp1+temp2)>>18;

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var1 = ((((signed long long int)FCL_P3 * (((var1>>2)*(var1>>2)) >> 13)) >>3)+((((signed long long int)FCL_P2) * var1)>>1))>>18;

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temp = ((((signed long long int)FCL_P2) * var1)>>1);
var1 = ((((signed long long int)FCL_P3*(((var1>>2)*(var1>>2))>>13))>>3)+temp)>>18;

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var1 = ((((signed long long int)FCL_P3 * (((var1>>2)*(var1>>2)) >> 13)) >>3)+((((signed long long int)FCL_P2) * var1)>>1))>>18;

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temp1 = (((signed long long int)FCL_P3 * (((var1>>2)*(var1>>2)) >> 13)) >>3);
temp2 = ((((signed long long int)FCL_P2) * var1)>>1);

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var1 = (temp1+temp2)>>18;

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signed long long int var1, temp1, temp2;
FCL_TFINE=170000;
FCL_P2=-10835;
FCL_P3=3024;

var1 = (((signed long long int)FCL_TFINE)>>1) - (signed long long int)64000;
temp1 = (((signed long long int)FCL_P3 * (((var1>>2)*(var1>>2)) >> 13)) >>3);
temp2 = ((((signed long long int)FCL_P2) * var1)>>1);
var1 = (temp1+temp2)>>18;
//var1 = ((((signed long long int)FCL_P3 * (((var1>>2)*(var1>>2)) >> 13)) >>3) + ((((signed long long int)FCL_P2) * var1)>>1))>>18;

FCL_VARB1=var1;

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var1 = (temp1+temp2)>>18;

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//var1 = (temp1+temp2)>>18;

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var1 = ((((signed long long int)FCL_P3 * (((var1>>2)*(var1>>2)) >> 13)) >>3) + ((((signed long long int)FCL_P2) * var1)>>1))>>18;