Pololu TReX Manuel d'utilisateur

Pololu TReX User's Guide1. Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

TReX LEDs• Power LED (1): The blue power LED is located on the top board. When it is brightly illuminated, the TReXis receiving power and is running.

serially to an unpowered microcontroller. Ungrounding the SO pin will cause the TReX to startup asnormal; removing the mix jumper will put the TReX in

◦ While in Firmware-Upgrade Mode (see Section 6):▪ Red and green LEDs alternate around once per second: The TReX is waiting to see if it shouldenter f

Learning mode phase 1: learning neutralsWhile the red LED is on solid, the TReX is attempting to learn the neutral values of all five channels. Do NOT

4. RC/Analog in DetailThis section provides a detailed overview of the RC and analog modes of operation. It explains how the TReXprocesses its channel

4.b. Channel CalibrationAs was covered in Section 3.e, you can automatically calibrate your TReX for your RC or analog controller. If thisdoesn’t prov

Unlike with RC signals, the TReX has no way of telling if a channel is receiving a valid analog signal. A disconnectedchannel will still produce a res

5. The Serial InterfaceYou can use the serial interface for four general purposes: querying the TReX for information (any mode), settingits configurat

significant bits cleared (i.e. range from 0 – 127). This means that each data byte can only transmit seven bits ofinformation.One significant improvem

5.c. Serial Command List and DocumentationThe TReX command documentation [http://www.pololu.com/file/download/TReX_Commands_v1.2.pdf?file_id=0J1] (100

1. OverviewThe TReX Dual-Motor Controller [http://www.pololu.com/catalog/product/777] is a versatile DC motor controllerdesigned to seamlessly blend a

Steps 3, 4, & 5:_______________________________________________1 0 0 0 1 0 0 1 ) 1 0 0 0 0 1 1 0 0 0 0 1 1 1 1 1 0 0 0 0 0 0 0XOR 1 0 0 0 1 0 0 1

{int i, j;// generate a table value for all 256 possible byte valuesfor (i = 0; i < 256; i++){CRCTable[i] = (i & 0x80) ? i ^ CRCPoly : i;for (j

6. Updating the TReX's FirmwareCurrent Firmware VersionOur most recently released firmware update for the TReX motor controller is trexv1_2.trx [

This will bring up the Firmware Upgrade dialog, as shown below.Pololu TReX User's Guide © 2001–2013 Pololu Corporation6. Updating the TReX's

Select the COM port your TReX is connected to and enter the firmware update file’s path. Click the Program buttonto initiate the firmware update. If a

2. Contacting PololuYou can check the TReX motor controller page [http://www.pololu.com/catalog/product/777] for additional information.We would be de

3. Getting StartedTReX input/output connection pointsGetting started with your TReX can be as simple as connecting power, your motors, and your RC or

TReX motor connections (single battery)The figure above demonstrates how to connect two bidirectional motors and a unidirectional auxiliary motor to y

TReX motor connections (separate battery for the auxiliary motor)It is possible to power the auxiliary motor with a second, separate 0 – 24 V battery,

motor is considered “motor 1”. The motor speed/direction indicator LEDs will not work in this mode, nor will currentsensing or channel mixing. Althoug

or SI line should connect to your target’s transmit line (the orange wire in the figure above). On a DB9 connector, pin2 is your computer’s receive li

Warning: The Vcc column is tied to the output of a linear voltage regulator, so its current output islimited by thermal dissipation. The regulator wil