GPIBUSB Adapter update

Posted on Tuesday, July 8th, 2014 in open source, USB by DP


Another update on Scasagrande’s project, GPIBUSB Adapter rev4:

After working closely with a few individuals it was discovered that some of the pre-existing GPIB software (such as KE5FX’s tools) has some hardcoded serial port settings, one of which being the use of hardware flow control. After getting builds of the software tools with these disabled, some buffer problems were found using the default settings, under Windows, without the flow control. Running the software with WINE on Linux did not produce these issues. With some small tweaks to either the software or to Windows USB settings would fix the issue but that’s not very intuitive. A better long term solution would be to wire up the hardware flow control lines in the next hardware revision for use in a future firmware update.
That’s what I’ve done with the revision 4 PCB. In addition, I grounded a few unused digital lines on the micro to be able to, starting with rev4+, check what the hardware revision is in software. I also added two LEDs to the FT230X to allow it to signal on TX and RX.

This entry was posted on Tuesday, July 8th, 2014 at 11:00 am and is filed under open source, USB. You can follow any responses to this entry through the RSS 2.0 feed. You can skip to the end and leave a response. Pinging is currently not allowed.

2 Responses to “GPIBUSB Adapter update”

  1. Drone says:

    I’m still following this project, which will hopefully become an alternative to the Prologix device. Glad to see it is still alive and evolving. Many thanks, David

  2. Xykon says:

    I’m really interested as I recently picked up a 3 old lab devices (Frequency counter, Oscilloscope, Spectrum Analyser) that all have at least one of these ports.

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