Available at: www.etcurr.com Lesson 1.3 – Operate the Tumbler using a Jumper Pin

Operate the Tumbler using the jumper pin

Available at: www.etcurr.com Lesson 1.3 – Operate the Tumbler using a Jumper Pin

Operate the Tumbler Using a Jumper Pin

Performance Objective: Using a Cortex microcontroller and EasyC V4, operate the Tumbler successfully using a jumper pin.

Enabling Objectives: match the following parts to their description and/or function:

VEX jumper pin, VEXnet Joystick, USB A-A cable, EasyC V4 for Cortex, VEXnet USB adapter key, USB to serial cable, Default code

sync VEXnet joystick and microcontroller install VEXnet adaptor keys describe the process to download the Default code explain the purpose of the Default code explain LED codes on the microcontroller and joystick with

potential problems

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Sync the microcontroller with the Joystick

In order for a VEXnet Joystick to control a microcontroller, they must be synced

To sync you will need a USB A-A cable

Available at: www.etcurr.com Lesson 1.3 – Operate the Tumbler using a Jumper Pin

Sync the microcontroller with the Joystick

Plug one end of the USB A-A cable into the USB port on top of the microcontroller

Plug the other end of the USB A-A cable into the port on the back of the VEXnet joystick

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Syncing

Prop the Tumbler up on a block so that none of the wheels are touching a surfaceNOTE: This prevents the robot from

making unexpected movements Switch the microcontroller to ON

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Sync the microcontroller The lights on the microcontroller and the joystick

will blink and flash The LEDs labeled ROBOT and VEXnet on the Joystick

and microcontroller will turn green indicating that the synchronization is complete

Because the joystick is not switched on the Joystick LED on the Joystick will be red(this is ok for now)

If this is the case, your robot is now synced! (if not, see your instructor for troubleshooting or continue to the troubleshooting slide)

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Proper Light Sequence

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Troubleshooting

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Download the default code

The Default code is what come preinstalled on the microcontroller

The Default code allows you to operate the microcontroller without having to write a program

The Default code will not typically be loaded because most of the applications require a unique program to be written and downloaded

Available at: www.etcurr.com Lesson 1.3 – Operate the Tumbler using a Jumper Pin

Download the default code

First you will need the orange USB to serial cable

Plug the USB end of the cable into the computer

Plug the serial end of the cable into the port on the back of the joystick labeled Program

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Download the default code

Open the easyC V4 Cortex software from the start menu or desktop icon

Begin a New Standalone Project

Select Joystick Project (WiFi)

Click OK

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Download the default code On the top menu bar of

the EasyC V4 software select Build and Download

Choose Download Default code

Click yes to download the Default HEX File

Close the window that pops up reminding you to upload the master code

Available at: www.etcurr.com Lesson 1.3 – Operate the Tumbler using a Jumper Pin

Download the default code

The HEX File will now download onto the microcontroller

Click OK on the window informing you that the file has downloaded

Close the IFI/intelitek loader window

Available at: www.etcurr.com Lesson 1.3 – Operate the Tumbler using a Jumper Pin

Insert the VEXnet USB Adapter Key

Now turn off the Tumbler.

Remove the USB A-A cable from both devices

Insert the VEXnet USB adapter Key into the microcontroller and the Joystick

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Using the jumper pin

Your Tumbler should be operating in Tank mode now. The left side motors run in the same direction

when the left joystick is pushed The right side motors run in the same direction

when the right joystick is pushed One or more of your motors may be turning in

the wrong direction If so, place a jumper pin into the corresponding

digital input of the motor port

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Using the jumper pin

If you want to operate the robot in arcade mode (one joystick controls both the right and left motors) place a jumper pin into digital input 12

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Finished

If after syncing your microcontroller and joystick, downloading the Default code, and using jumper pins if necessary, you should be able to drive your Tumbler around!

Congratulations!