RS-232 C++ Programming Post: 302152968

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Top Forums Programming RS-232 C++ Programming Post 302152968 by WebKruncher on Saturday 22nd of December 2007 06:09:13 PM

12-22-2007

Registered User

Great find!

mikes serial device resources look really good.

The way I look at it, the most important thing to consider is that the device may not do what you think it will. The utility needs to have a way of checking to see if it did what you asked it to do. It needs to be patient, the clock on your target device is not in sync with your cpu, so don't expect it to respond, just check, and patiently wait 'till it says it did what you asked it to do, then let your program continue on to the next command. If it never does what you asked it to do, request a heartbeat response, there might be a com problem, or the device may be busy or dead, when you get a response, you've got to be able to issue the command that failed again (and you might have to send re-init sequences before you can do that right).

It makes good sense to start with some libraries that already do approximately what you want to do, then refine, maintain and extend 'till it does exactly what you want.

WebKruncher

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LEARN ABOUT XFREE86

umct

UMCT(4) 						   BSD Kernel Interfaces Manual 						   UMCT(4)

NAME

     umct -- Magic Control Technology USB-RS232 converter driver

SYNOPSIS

     To compile this driver into the kernel, place the following lines in your kernel configuration file:

	   device umct
	   device ucom

     Alternatively, to load the driver as a module at boot time, place the following line in loader.conf(5):

	   umct_load="YES"

DESCRIPTION

     The umct driver provides support for USB to RS-232 converters based on the Magic Control Technology USB-232 design.  These devices support
     most of the standard RS-232 features including baud rates ranging from 300 to 115200 bits per second.  However, neither hardware nor software
     flow control seems to be supported.

     Access to devices under this driver is via the ucom(4) framework and device nodes.

HARDWARE

     The umct driver supports the following adapters:

     o	 Belkin F5U109
     o	 Belkin F5U409
     o	 D-Link DU-H3SP USB BAY Hub
     o	 Magic Control Technology USB-232
     o	 Sitecom USB-232

SEE ALSO

     tty(4), ucom(4), usb(4)

HISTORY

     The umct driver appeared in FreeBSD 5.2.  It is loosely based on the ubsa(4) driver by Alexander Kabaev <kan@FreeBSD.org> with documentation
     from Wolfgang Grandeggar <wolfgang@cec.ch>.

AUTHORS

     The umct driver was written by Scott Long <scottl@FreeBSD.org>.

BSD
								 November 22, 2006							       BSD