Olimex AVR USB JTAG recover FTDI FT232R EEPROM settings

Development Boards MicroMod
1

Hi all,

I accidentally programmed the wrong FTDI FT232R device with the [FTDI’s MPROG utility. Now my [Olimex AVR USB JTAG won’t be recognized with Atmel AVR studio. It cannot connect to COM4 as specified in the Windows Device Manager:

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My current incorrect EEPROM settings:

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Can someone please download the [FTDI’s MPROG utility and post the settings here?

  1. Extract the zip.

  2. Run MProg.exe.

  3. Click Tools > Read and Parse.

  4. Make a screenshot and post it here.

That would be very helpful!

Thanks,

Erwin](http://www.ftdichip.com/Resources/Utilities/FT_Prog_v1.9.zip)](Olimex AVR JTAG USB FT232 R INCORRECT EEPROM sett — Postimages)](bandsaw — Postimages)](http://www.olimex.com/dev/avr-usb-jtag.html)](http://www.ftdichip.com/Resources/Utilities/FT_Prog_v1.9.zip)

2

I found a solution! See the screenshot below:

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After some experimenting: The RS232 TXD and RXD signals should not be inverted.

Some additional information:

My chip Olimex AVR USB JTAG device died with experimenting with the FTDI tools when I tried to program another FTDI chip. Don’t ask me what I did wrong, because I’ve really no idea. Windows did not recognize the Olimex FT232R chip anymore. The reason: A corrupted (on-chip) FT232R EEPROM. The [Microsoft USBView - USB Connection Viewer utility only reported zero’s. VID and PID were 0 as well, so Windows could not load a driver. I figured out that this was related to a missing FT232 clock. The FT232R can be configured to an internal oscillator (default factory setting) or external 12MHz XTAL. This setting will be saved in the EEPROM.

However, the clock setting can only be changed over USB with FTDI’s [FT2xxR Clock utility, but I had no USB connection. So the solution was to solder a 12MHz XTAL on pins 27 OSCI and 28 OSCO of the FT232R and connect it to the computer. Then run the FT2xxR Clock utility and configure to internal clock. Wow! Now we have a connection between the PC and the FT232. Then run the MPROG utility and configure the FT232R settings Vendor ID = 0403 and Product ID 6001 and the settings above. Now we have a USB Serial Converter and new USB Serial Port (COMx) in the Windows Device Manager.

Connect with Atmel AVR studio and it works! I’m very happy!](http://www.ftdichip.com/Resources/Utilities.htm)](http://www.ftdichip.com/Resources/Utilities.htm)](Olimex AVR USB JTAG FTDI MPROG FT232 R EEPROM set — Postimages)