Programming instructions

Reference

Project Lead The Way

and Carnegie Mellon Robotics Academy

/ For use with VEX

Robotics Systems

Troubleshooting ROBOTC with Cortex • 5

Troubleshooting ROBOTC with Cortex

9.AdditionalSteps

• TrydownloadingtheROBOTCFirmwareusinganothercomputer,withthesameCortex.

• TrydownloadingtheROBOTCFirmwareusingthesamecomputer,withadifferentCortex.

• TryusingadifferentUSBA-to-Acable.

10.Slowdownthermwaredownloadbyinsertingdelays.

• GotoWindow>Menulevel>andselectSuperUser

• GotoView>Preferences>DetailedPreferences...

• GototheVEXCortexTab

• -Theboxnextto“DelayBetweenHIDWrite”allowsyoutospecifyanumberof

 millisecondstoinsertasdelays.

• Adda5milliseconddelay

• RetrydownloadingtheROBOTCFirmware

• Continuetoaddshortdelaysupuntil100milliseconds.

• RetrydownloadingtheMasterCPUrmwareuntilsuccess.

Problem: Not able to Download Master CPU Firmware over USB

1.WasthecorrectstartupsequencefollowedwhenconnectingtheCortextothecomputer?

• StartwiththeCortexTurnedOFF

• ConnecttheCortextothecomputeroverUSB

• TurntheCortexOn