2681 serial communications manager (QNX Neutrino)
|You must be root to start this driver.|
devc-ser2681 [[options] [port[^shift[,intr]]]]... & devc-tser2681 [[options] [port[^shift[,intr]]]]... &
The options are position-dependent and affect the subsequent ports.
The order in which you specify the -E or -e, and -S or -s options matters:
|Options||Mode||Software flow control|
The default shift is 0.
The devc-ser2681 manager is a small serial device manager for QNX Neutrino. It can support any number of serial ports using 2681s. Each device can be assigned its own interrupt or share an interrupt if the hardware supports interrupt sharing. If you don't specify any I/O ports for devices, devc-ser2681 assumes you want to use the standard ports.
The devc-tser2681 manager is a "tiny" version of devc-ser2681 that's intended for memory-constrained systems. It doesn't support special character editing (e.g. toggling insert mode, special erase characters).
Each device is given a name in the pathname space of /dev/sern, where n starts at 1 and increases. You can use the -u option to specify the starting number.
|If your application uses /dev/console,
you should create a link from it to one of
/dev/ser1, /dev/ser2, ... by adding
a line like this to the buildfile used by mkifs:
[type=link] /dev/console = /dev/ser1
All devices are fully interrupt driven and by default support standard hardware flow control on input and output (RTS/CTS). This can be disabled by the -F option.
|Hardware flow control is not supported in edited mode.|
A read request by default returns when at least 1 character is available. To increase efficiency, you can control three parameters to control when a read is satisfied:
|If the Min value is greater than the size of the input buffer, the Min value is clipped to the size of the buffer. To avoid this, the size of the input buffer can be changed with the -I option.|
These parameters are set using library routines (see tcgetattr(), tcsetattr(), readcond() and TimerTimeout() in the Library Reference).
The devc-ser2681 driver supports both raw and edited modes, making it a real tty device.
The following fields and flags are supported in the termios structure:
|c_iflag||BRKINT ICRNL IGNBRK IXON|
|c_cflag||CLOCAL CSIZE CSTOPB PARENB PARODD|
|c_lflag||ECHO ECHOE ECHOK ECHONL ICANON IEXTEN ISIG NOFLSH|
Start devc-ser2681, using the default serial ports 1 and 2:
Start devc-ser2681, using the default serial ports 1 and 2, but changing the baud rate to 38400:
devc-ser2681 -b 38400 &
Start devc-ser2681 with five ports (with the last four preset to 38400 baud):
devc-ser2681 3f8,4 -b 38400 280,3 288,3 290,3 298,3 &
You can specify multiple -F and -f options; they're position-dependent, and affect the next serial port:
devc-ser2681 -F 3f8,4 -f 2f8,3 &
Character I/O drivers (devc-*) in the Utilities Summary