On Fri, 17 Mar 2000, John Florence wrote:
> We are developing an application that needs an interface to a
> satellite communications modem (5 kHz DAMA). The modem requires
> synchronous communications and uses modem control lines, RTS and
> CTS, for accepting input data from the application.
Get my serial_suite.tgz and HOWTO-serial.tgz via ftp from
scicom.alphacdc.com/pub/linux. These will tell you all the ways that
the serial ports can be configured on Linux.
> We have concluded that we should build/buy a synchronous serial
> device and Linux device driver. While writing a device driver is
> far removed from my expertise I have bought Rubini's book and I'm
> entertaining the thought of making the attempt.
The Linux device driver will work with the standard UART's on any PC
available on today's market. No special purchases needed.
> Our current test suite utilizes this pipe-like application running
> on a Linux box that talks asynchronously, using the linux serial
> driver, to the modem via a synch/async converter. This works fine
> except for the start and stop bits inserted in the synchronous data
> stream.
The Linux device driver can be used syncronously if the 'struct
termios' is properly configured. That is the purpose of the documents
referenced above.
> I don't really want do reinvent the wheel. Does anyone know of an
> existing synchronous serial device and driver that we should
> investigate?
After you get the device driver working, you are your own about how to
process the data in application.
With any luck, you will become familiar with Linux and dump NT and
start using a real operating system. In case you are interested, you
can download the complete system from metalab.unc.edu/pub/Linux/ The
major distributions are Debian, Red Hat, and Slackware.
vern
--
Vernon C. Hoxie [EMAIL PROTECTED]
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Never let your schooling interfere with your education.
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