USB Conflict between ICDU-40 and FTDI chips

[sergio1234]

We are developing an USB application that uses a PIC18F2580 and a FTDI chip FT245R
For this job, we are using a CCS PCWH compiler v3.241, and an ICDU-40 in circuit debbuging tool

When the ICDU-40 and the FT245R are plugged in simultaneously on the same PC, and we want to use the ICDU-40, either calling to the debbugger for testing, or to ICD.exe to programming, an error of access violation appears and the PCWH IDE hangs. (only exit throgh Ctrl-Alt-Del)

The error text is :
Access violation at address 01F74E6F in module �CCSICDU.DLL� Read of address 60010403

Note you that the address 60010403 correspond to the default USB / PID (6001) - USB / VID (0403) that comes with our FTDI FT245R chip.

This error appears whenever I try to use ICDU-40, independently of the code that has in that moment in the PCWH-IDE

Due to this problem we are not able to neither to make debbuging neither to program PIC while FT245R is plugged in the port USB of the PC


Thank you for your help to solve this problem

Regards
Sergio (from Argentina)

[Martin Berriman]

Sergio, did you get anywhere with this?