Get the servo velocity

Reads the current velocity from the OpenServo.

[Add information about range of scaling on velocity]

Reading the OpenServo requires two I2C transactions. The first sets the register to be read, and the second is the read transaction.

16bit precision

Read the current velocity from the OpenServo. This is the exact position of the OpenServo at the time of reading.

In order to get the current velocity you must get a 16 bit registers. Assuming device = 0x10

Get the velocity:

VELOCITY_HI = 0x0A VELOCITY_LO = 0x0B
send  [device VELOCITY_HI]
read  [device {vel_hi} {vel_lo}]
send [0x10 0x0A]
read [0x10 {vel_hi} {vel_lo}]