bmp180 pressure code in matlab

main.m
% Create an Arduino object
a = arduino('COM3', 'Uno');

% Add library for I2C communication
addI2CInterface(a, 'I2C');

% I2C address of BMP180
addr = 0x77;

% Initialize the sensor
bmp180 = i2cdev(a, 'I2CAddr', addr);

% Calibration constants for pressure calculation
ac1 = -14446;
ac2 = 14739;
ac3 = 5245;
ac4 = 31325;
ac5 = 26211;
ac6 = 19208;
b1 = 6515;
b2 = 50;
mb = -32768;
mc = -11786;
md = 2889;

% Read uncompensated pressure value
write(bmp180, hex2dec('F4'));  % Start pressure measurement
pause(0.005);  % Wait for measurement to complete
pressure_raw = read(bmp180, 3);  % Read 3 bytes

% Calculate true pressure value
up = typecast(uint16(pressure_raw(1)*256 + pressure_raw(2)), 'int32');
b6 = up - 4000;
b6 = b6 * b6 / 4096;
x1 = (b2 * b6) / 2048;
x2 = ac2 * b6;
x3 = x1 + x2;
b3 = (((int32(ac1) * 4 + x3) << 2) + 2) / 4;
x1 = ac3 * b6 / 8192;
x2 = (b1 * (b6 * b6 / 4096)) / 65536;
x3 = ((x1 + x2) + 2) / 4;
b4 = ac4 * uint32(x3 + 32768) / 32768;
b7 = uint32(up - b3) * (50000 >> 0);
if (b7 < 0x80000000)
   p = (b7 * 2) / b4;
else
   p = (b7 / b4) * 2;
end
x1 = (p / 256) * (p / 256);
x1 = (x1 * 3038) / 65536;
x2 = (-7357 * p) / 65536;
p = p + (x1 + x2 + 3791) / 16;

% Display pressure value
disp(['Pressure: ' num2str(p) ' Pa']);

% Delete the Arduino object
clear a;
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