Innovatek OS GmbH - FORUM

Hi,

I finally got the FanControl application working under linux using wine. (Anyone interested in this ).

I had to make some patches to the wine code as well as to the FTDI linux driver. I am now trying to sort out why they are needed.

Can anyone at innovatek tell me if FanControl calls SetCommState() with the following dcb fields: fOutX=0 and fInX=1.

If so, why is the fInX set to 1? I would say that because the communication is binary both ways there should not be any flow control (with ^S/^Q) in either way.

The problem is that the wine code (erroneously) translates this fInX to the linux IXON tty state. This will eat the ^S and ^Q characters coming from the FOM-PRO. This will results in garbled data and no proper communication. I am currently discussing this with the wine people. The fInX should be translated to IXOFF, which sends ^S/^Q when the input buffer fills up. This is also not suitable for the FOM-PRO, but it will probably not hurt because the buffer never fills up in practice. Still it does not seem to be correct.

Regards,
Tom

Hi,

fOutX and fInX are at 1 for default.
There is no change of this default values in the code.

Steve

Hi Steve,

That is strange. I would guess that you would not like xon/xoff control in any direction because these characters can be in the binary data of telegrams and you don't want flow control to eat them away. Can you explain how this is circumvented? (Am I right that fOutX and fInX at 1 mean that xon/off flow control is requested in both directions?)

Thanks,
Tom