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
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