# How to read data from i2c using i2cget?

I'm new to embedded devices and am trying to understand how to use i2cget (or the entire I2C protocol really).

I'm using an accelerometer MMA8452, and the datasheet says the Slave Address is 0x1D (if my SAO=1, which I believe is referring to the I2C bus being on channel 1 on my raspberrypi v2).

From the command line, I enter

sudo i2cget -y 1 0X1d


It returns

0X00


I think that means I'm attached to the correct device.

So now, I'm trying to figure out how do I get actual data back from the accelerometer?

The i2c spec says

i2cget [-y] i2cbus chip-address [data-address [mode]]


So I have tried

sudo i2cget -y 1 0x1D 0x01


where 0x01 is the OUT_X_MSB. I'm not sure entirely what I'm expecting to get back, but I figured if I saw some data other than 0x00, I might be able to figure that out.

Am I using ic2get wrong? Is there a better way to learn and get data from i2c?

The datasheet for my accelerometer chip is at http://dlnmh9ip6v2uc.cloudfront.net/datasheets/Sensors/Accelerometers/MMA8452Q.pdf