FTDI Community

General Category => Discussion - Hardware => Topic started by: NorthGuy on February 05, 2021, 06:13:27 PM

Title: Setting "Ignore Session Underrun"
Post by: NorthGuy on February 05, 2021, 06:13:27 PM
The AN_370 configuration documentation lists two different options for "Ignore Session Underrun":

- On Multiple of MaxPacketSize bytes
- On Multiple of FIFO bus-width bytes

I want to set this using FT_SetChipConfiguration(), but the FT_60XCONFIGURATION in FTD3XX.h doesn't contain any fields for this.

FT_60XCONFIGURATION is not documented, so one must guess the functionality by field names. The closest I could find is the CONFIGURATION_OPTIONAL_FEATURE_DISABLECANCELSESSIONUNDERRUN flag in the OptionalFeatureSupport member, which I guess I need to set. But nothing to distinguish between "On Multiple of FIFO bus-width bytes" and "On Multiple of MaxPacketSize bytes".

So, how do I select between "On Multiple of FIFO bus-width bytes" and "On Multiple of MaxPacketSize bytes"?

Title: Re: Setting "Ignore Session Underrun"
Post by: FTDI Community on February 09, 2021, 04:33:53 PM
Hello,

Please contact your local support team who can look into this further:

https://ftdichip.com/technical-support/ (https://ftdichip.com/technical-support/)

Best Regards,
FTDI Community