In the command prompt, you can use stty to view and alter settings on your port, however data rate does not matter, even if it accepts it or shows it, this is straight USB not serial USB. A good setting to use is -raw to make the port raw and turn off local echo and other properties which are invasive to what you want to see.
If whatever you're attaching too talks all the time, you can see the output of /dev/ttyACM0 using the cat command and you can send "type-able" data to it using the echo, just not control characters, or not easily. Examples:
Code:
cat /dev/ttyACM0
echo run > /dev/ttyACM0
I have posted some blog entries about this topic, including C code examples, the first is an example how to parse GPS data through a serial USB connection:
http://<br />
http://www.linuxquest...e-35551/<br />
The next on is using select() to check for data from multiple descriptors.
http://<br />
http://www.linuxquest...t-35530/<br />