More than one ftdi 2232c device

Development Boards MicroMod
1

Hi

I have a hardware system with two ftdi 2232C usb devices. Each of these device manage a JTAG chain. When openocd start choose the first

ftdi device that ftdi_usb_open_desc function finds on usb device list.

How can I select the other ftdi device?

Thank you in advance

Best Regards

Andrea Sorio

PS: I apologize for my English

2

Hi Andrea,

OpenOCD JTAG server can select the right JTAGkey on startup.

  1. Find the serial number :

If you have a recent OpenOCD JTAG Server, you will get the serial number of the Amontec JTAGkey or any other FT2232 JTAG device at the startup of OpenOCD

  1. Use the serial number

For that, you have to write the serial number of the JTAGkey you want to use in a specific configuration file as :

Example for a Amontec JTAGkey Full Speed USB JTAG Dongle :

ft2232_device_desc “Amontec JTAGkey”

ft2232_serial xyxyxyxy

Example for a Amontec JTAGkey-2 High Speed USB JTAG Dongle :

ft2232_device_desc “Amontec JTAGkey-2”

ft2232_serial abcdefgh

Please refer you to the OpenOCD documention and search for serial number.

Note : From 2005 :wink: Amontec provides unique serial numbers for each Amontec JTAGkey Dongle, but this is not the case for all FT2232 JTAG devices from other makers.

Best regards,

Laurent

http://www.amontec.com

3

The Serial number can be entered in the excellent “Rowley Crossworks for ARM” too.

Example :

Select “Amontec JTAGkey” as JTAG Interface Dongle and fill the field Serial Number of your Amontec JTAGkey.

Best regards,

Laurent

http://www.amontec.com