libftdi Archives

Subject: Baud rate not set correctly for INTERFACE_B on FT2232D chip

From: max_peck <stephen.h.nease@xxxxxxxxx>
To: libftdi@xxxxxxxxxxxxxxxxxxxxxxx
Date: Wed, 26 Mar 2014 09:40:56 -0700 (PDT)
Hi all,

I am working with an FT2232D chip, libftdi 1.1, and libusb-1.0-0-dev. I have
added a single line to the baud_test.c file in the examples directory in
order to test channel 2 of the chip. After the ftdi_new() call, I have:

ftdi_set_interface(ftdi, INTERFACE_B);

When I compile and run a test at a baud rate of 115200, I get a much slower
rate of 1342, a factor of 0.012. If I set the interface back to INTERFACE_A,
I get approximately the correct results, with a rate of 122843 (factor of
1.066). Has anyone seen a result like this?

Thanks!



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