I have a serial to USB device which supports speeds of 8Mbaud and 12Mbaud (based on FT232H IC). I have tested it under Windows using HTerm, works just fine, but I had to resort to HTerm with hacked config to enable support for speeds I use. During tests I noticed, that quite a few applications meant for serial comms silently limit baudrates to either 115200 or 1Mbaud (measured with an oscilloscope), if baudrate param exceeds whatever maximum they have set internally.
Now I'm trying to achieve this connection with a Linux machine (Debian in my case). Tried stty, that does not accept non-standard speed parameters. Screen seems to cap baudrate internally, since I receive nothing above 1Mbaud.
At the moment I have no space left on root to install Qt5 and cannot try out HTerm linux branch, but is there any other tool that would be able to communicate with serial devices outside normal baudrate range?