Linux serial port reading - can I change size of input buffer?

Question

I am writing an application on Ubuntu Linux in C++ to read data from a serial port. It is working successfully by my code calling select() and then ioctl(fd,F

Answer 1

You can try to play with the VMIN and VTIME values of the c_cc member of the termios struct. Some info here, especially in the section 3.2.

Answer 2

You want to use the serial IOCTL TIOCSSERIAL which allows changing both receive buffer depth and send buffer depth (among other things). The maximums depend on your hardware, but if a 16550A is in play, the max buffer depth is 14.

You can find code that does something similar to what you want to do here

The original link went bad: http://www.groupsrv.com/linux/about57282.html The new one will have to do until I write another or find a better example.