Data Sheet

MD04 PC setup program

We have a simple configuration program for the PC that will allow you to change the communication

type and if necessary the baud rate

Modes of operation

I2C mode

I2C mode operates with a device address set in the USB configuration. The MD04 has 8 registers:

0 Command R/W Write 1 for forwards, 2 for reverse, 0 for instant stop

1 Status R Acceleration, temperature and current status

2 Speed R/W Motor speed 0-255 (0x00 - 0xFF)

3 Acceleration R/W Motor acceleration 0-255 (0x00 - 0xFF)

4 Temperature R Module temperature in degrees centigrade

5 Motor current R Motor current

6 Unused R Read as zero

7 Version R Software revision

Command register

Controls the motor start, stop and direction. Write 1 to drive forwards, Write 2 to reverse, Write 0 to

stop instantly. Be sure to have set the speed and acceleration before issuing these commands.

Note - The way to stop the motor is the same as other speed changes, write the new speed to the speed

set by the acceleration register. If you wish the motor to stop instantly and bypass the acceleration

feature then write zero here, be aware that bypassing the acceleration routines does put high stresses on

gearboxes of motors.