Retrieve data from a USB port

@ theNbomr: Thanks!
Actually I setted also VTIME!=0 so after a while the program stops reading the port.

ANother question:
After using my silly program I have the prompt messed up, like

xxx/home>
xxx/home>
xxx/home>

if I press enter and I don't see what I write!
Maybe it's because of the program code?

tcsetattr(STDOUT_FILENO,TCSANOW, &stdio); tcsetattr(STDOUT_FILENO, TCSAFLUSH, &stdio); tcsetattr(fd, TCSANOW, &options); fcntl(fd, F_SETFL, 0);

Otherwise how can I time-out the reading in c?
Thanks in advance to anyone that will help me.
Best Regards
Ninaeve

To time out a read, you need to set VMIN=0, and and VTIME=non-zero. See the link I posted for all of the details.

I have no idea how your program can be affecting your prompt, unless it is outputting escape-sequence characters that the terminal is interpreting as some kind of cursor control or otherwise affecting the terminal.

--- rod.

Attention to mods: Using Chrome browser gives me a response when posting: 'This forum requires that you wait 3 seconds between posts. Please try again in 3 seconds.'. Then when I re-submit, I get a double-post that I cannot edit.

@theNbomr: thanks again!
To time out a read, I understood you can also set VMIN=non-zero, and and VTIME=non-zero: you time-out when you have read VMIN characters or if in VTIME you din't read any.
It is correct?
Ok,if so it could be a problem if the communication is dropped at 0<characters<VMIN ...


I will look again for possible outputting escape-sequence characters (sob and ^__^ ''')
but THANK you very much
Ninaeve