Timing out on Serial Read

[was1984]

Yes, the "instrument" is a device we built in the lab and we are using this "USB245M" to virtualize a RS232 COM port to communicate with the PC.  Here is the documentation on the USB245M.  Unfortunately, it isn't very good.

http://www.ftdichip.com/Documents/DataSheets/DLP/dlp-usb245m13.pdf

[Dennis_Knutson]

That TXE# pin is set from the micro it looks like. That would point to a hardware problem or something wrong in the micro code.

[was1984]

We aren't controlling TXE# from the microcontroller and are able to retrieve data in Matlab.  My understanding is that TXE# is controlled by the USB245M, I just was wondering if I also had to enable it initially from the PC.  I'm starting to think that isn't actually my problem.

[Dennis_Knutson · Accepted solution]

Can you read data in Hyperterminal?

[was1984]

Ok, I spoke with the person who wrote the matlab code and have this figured out.  There is a required transmit byte before data starts transmitting.  Thanks for your help with this.

[Broken_Arrow]

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Dennis Knutson wrote:
Can you read data in Hyperterminal?

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If I ever make a signature, that'll be it.