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Full Discussion: Read line from serial device with BASH
Top Forums Shell Programming and Scripting Read line from serial device with BASH Post 302985023 by Don Cragun on Thursday 3rd of November 2016 06:47:19 PM
Old 11-03-2016
Quote:
Originally Posted by RudiC
I thought about proposing using the stty utility as well but wasn't sure if it would work/apply, as we are dealing with a USB GPIO device.
Using stty might or might not work, but it is really easy to find out...

If the command stty < /dev/ttyACM0 works (printing the current settings for the device), it will work. If it exits with a non-zero exit status and prints a diagnostic similar to:
Code:
stty: stdin isn't a terminal

then it won't work.
 

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LEARN ABOUT FREEBSD

sicontrol

SICONTROL(8)						    BSD System Manager's Manual 					      SICONTROL(8)

NAME

     sicontrol -- Specialix SI/XIO driver configuration and debugging

SYNOPSIS

     sicontrol device command [param ...]

DESCRIPTION

     The sicontrol utility is used to configure and monitor the SI/XIO device driver.

     The sicontrol utility operates on the specified device to indicate which port is to be used.

     The special device string `-' is used to indicate the global driver settings instead.

     A /dev/ is included if necessary.

     The following commands are used for the global settings and should be specified with the '-' device name:

     int_throttle [value]
	   Configure the `aggregate interrupt throttle value'.	The maximum number of host adapter interrupts per second is determined by:

	   controller CPU clock / (8 * int_throttle)

	   The default value at boot time is 25000.  The host adapter cpu clock is 25MHz.  This gives a maximum interrupt rate of about 125 inter-
	   rupts per second.

	   Lowering this value will increase the rate in which the host adapter can interrupt the operating system for attention.

     rxint_throttle [value]
	   Configure the receiver interrupt throttle value.  The default value of 4 at boot time allows an interrupt rate of approximately 25.

	   Lowering this value will increase the rate in which the host adapter can interrupt the operating system to empty the receiver fifos.

     nport
	   Return the number of ports under the control of the device driver.

     The following commands are used for the individual ports and should be specified with a device name from /dev:

     mstate
	   Show the current incoming modem control signals.

     ccbstat
	   Show the current "ccb" structure for the specified port.  This is not of much use outside of debugging the driver and determining why a
	   port is wedged.

FILES

     /dev/si_control  global driver control file for use by sicontrol
     /dev/ttyA*       terminal control ports
     /dev/ttyiA*      initial termios state devices, for use by stty(1)
     /dev/ttylA*      locked termios state devices, for use by stty(1)

DIAGNOSTICS

     Generally self explanatory.....

SEE ALSO

     stty(1), si(4), termios(4), tty(4), comcontrol(8)

HISTORY

     The sicontrol utility is loosely based on a utility called siconfig which was written by Andy Rutter <andy@acronym.co.uk>.

     Specialix International do not support this device driver in any way.

AUTHORS

     Peter Wemm <peter@FreeBSD.org>

BUGS

     Bound to be many...  :-)

BSD
								September 26, 1995							       BSD
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