RTEMS 4.9.0 On-Line Library

Console Driver Opening a serial device

BSP and Device Driver Development Guide

8.4.4: Opening a serial device

The console_open function is called whenever a serial device is opened. The device registered as "/dev/console" is opened automatically during RTEMS initialization. For instance, if UART channel 2 is registered as "/dev/tty1", the console_open entry point will be called as the result of an fopen("/dev/tty1", mode) in the application.

The console_open function has to inform Termios of the low-level functions for serial line support; the "callbacks".

The gen68340 BSP defines two sets of callback tables:

one with functions for polled input/output
another with functions for interrupt driven input/output

This code can be found in the file $BSPROOT/console/console.c.

BSP and Device Driver Development Guide