Barometer (BMP180) pressure measurement problem

Question

I have a barometer (BMP180) and am interfacing it with aSTM32. I have to read the altitude which should have a precision of a foot.

While interfacing the barometer, I get a consistent real value of temperature but the pressure comes in the range of 59400 Pa (Pa - as per Bosch Datasheet). The example given in the datasheet also has pressure of 69964 Pa.

I have taken care of the delays required for the barometer to sample the data by using software based counters. Also, I checked my sensor with available libraries and everything comes consistent. But due to some academic reasons I can't use the libraries and so I need help in measuring the pressure.

Here is my STM32 Code:

//calibration params from the sensor
static int16_t AC1 = 8353; 
static int16_t AC2 = -1041;  
static int16_t AC3 = -14621; 
static uint16_t AC4 = 33880; 
static uint16_t AC5 = 25158; 
static uint16_t AC6 = 18608; 
static int16_t B1 = 6515; 
static int16_t B2 = 35; 
static int16_t MB = -32768; 
static int16_t MC = -11786; 
static int16_t MD = 2724;

static int TMPCNT = 0, PRSCNT=0;    //loop counters
static double temperature, pressure;
static uint8_t oss = 3;             // bmp high resolution 
static long UT, X1, X2, B5, UP;

int main() {
  while (1) {
    if (TMPCNT == 2) {  //2.7*2 > 5ms so sample temp every 5 ms 
      MSR_TEMP();       //measure for previous request
      RQST_TEMP();      // request again
      TMPCNT = 0;
    }
    TMPCNT++;       
                
    if (PRSCNT == 10) { //sample pressure every 27ms (25ms wait time for UH resolution)
      MSR_PRESS();
      RQST_PRESS();
      PRSCNT = 0;
    }
    PRSCNT++;

    /* some more code which takes 2.7 milliseconds */
  }
}

void RQST_TEMP() {
  i2c_transmit(BMP, 0xF4, 0x2E);   // transmit 0x2E to 0xF4 reg of BMP addr
}

void MSR_TEMP() {
  char buff[2];
  requestData(BMP, 0xF6, buff, 2); //request 2 bytes from BMP addr, reg 0xF6, and put it in the buff
  UT = (buff[0] << 8 | buff[1]);
  X1 = (long)((UT - AC6) * AC5 * pow(2, -15));
  X2 = (long)(MC * pow(2, 11) / (X1 + MD));
  B5 = X1 + X2;
  temperature = ((B5 + 8) * pow(2, -4)) / 10.0;
}

void RQST_PRESS(){
  i2c_transmit(BMP, 0xF4, (char)(0x34 + (oss << 6)));   
}

void MSR_PRESS() {
  long B6,x1,x2,x3,B3,p;
  unsigned long B4,B7;  
  char buff[3];

  requestData(BMP, 0xF6, buff, 3);
  UP = ((buff[0] << 16) + (buff[1] << 8) + buff[2]) >> (8-oss);
  B6 = B5 - 4000;
  x1 = (long)((B2 * (B6 * B6 * pow(2, -12))) * pow(2, -11));
  x2 = (long)(AC2 * B6 * pow(2, -11));
  x3 = x1 + x2;
  B3 = ((((long)AC1 * 4 + x3) << oss) + 2) / 4;
  x1 = AC3 * B6 * pow(2, -13);
  x2 = (B1 * (B6 * B6 * pow(2, -12))) * pow(2, -16);
  x3 = ((x1 + x2) + 2) * pow(2, -2);
  B4 = AC4 * (unsigned long)(x3 + 32768) * pow(2, -15);
  B7 = ((unsigned long)UP - B3) * (50000 >> oss);
  if (B7 < 0x80000000) {
    p = (B7 * 2) / B4;
  } else {
    p = (B7 / B4) * 2;
  }
  x1 = (p * pow(2, -8)) * (p * pow(2, -8));
  x1 = (x1 * 3038) * pow(2, -16);
  x2 = (-7357 * p) * pow(2, -16);
  pressure = p + ((x1 + x2 + 3791) * pow(2, -4)); // pressure is in Pa as per data sheet
  // SerialPrint("%lf\n",pressure);
}

The code written is based on the algorithm mentioned in the datasheet. Here is the datasheet. I dont know what I am doing wrong. My location should have pressure of 101209Pa which is way far from what I am getting. My I2C driver functions are also working as they should. So I cant figure out where exactly the problem is. I'll surely appreciate some help.