ADXL313 Accelerometer help

Using Arduino Sensors
1

I'm trying to rearrange the binary numbers. I'm getting zero for my x and y which is correct, but when I move it just a little bit, the number goes to 127 which means that I need to organized the bytes. I'm trying to read register 0x33 before 0x32 for the x value, 0x35 before 0x34 for y value, and 0x37 before 0x36, but I don't know how. If anyone knows how, please let me know!
Below is the code that I'm using to read the data:

// === Read acceleromter data === //
Wire.beginTransmission(ADXL313);
Wire.write(0x32); // Start with register 0x32
Wire.endTransmission(false);
Wire.requestFrom(ADXL313, 6, true); // Read 6 registers total, each axis value is stored in 2 registers
X_out = ( Wire.read()| Wire.read() << 8); // X-axis value
Y_out = ( Wire.read()| Wire.read() << 8); // Y-axis value
Z_out = ( Wire.read()| Wire.read() << 8); // Z-axis value

2

C/C++ does not guarantee the order of execution of operations within a line of code.

This is safer. Rearrange the shift as required.

int t = Wire.read() << 8;
X_out = t | (Wire.read()); // X-axis value
t = Wire.read() << 8;
Y_out = t |( Wire.read()); // Y-axis value
t = Wire.read() << 8;
Z_out = t | ( Wire.read()); // Z-axis value
3

Now it's giving me random value instead of 127 when I move it a little bit and for the z axis value is 127.

4

Not enough information. Please read and follow the directions in the "How to get the best out of this forum" post, at the head of every forum topic.

Be sure to post ALL your code, using code tags, in addition to the other information needed to understand your question.

5

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