Jay,
Couple of points that may help you.
1) A serial port does not have data ports 0-n. A serial port takes a
byte (8 bits), then shifts them down a single pipe using a chip called a
UART (feel free to google for unfamiliar terms).
example
Bit pattern 1010 1010
would be shifted one bit at a
For those looking, I've already used IC's that convert RS232 to TTL,
look up MAX233. It drops 12 to 5, essentially converting RS232 to TTL
and vice versa. PyParallel is definitely the way I'll go, however,
this project will be on hold for me for my priorities have been
shifted. Thanks again for
Richard Brodie [EMAIL PROTECTED] wrote:
If you just need one or two signals, then it might be practical to use one
of the control lines, and PySerial supports this (UPS monitoring software
often works this way).
I've done this many times (not with PySerial) for misc sensors.
With PySerial
Roy Smith [EMAIL PROTECTED] wrote in message
news:[EMAIL PROTECTED]
[EMAIL PROTECTED] [EMAIL PROTECTED] wrote:
While I realize this is more on a driver/hardware level it's
interesting that it's so difficult to use a different protocol for an
existing driver. For example, all serial does is
Richard Brodie wrote:
If you just need one or two signals, then it might be practical to use one
of the control lines, and PySerial supports this (UPS monitoring software
often works this way). Setting 8 pins to 1 would be impossible, because
there plain won't be that number of outputs wired,
Peter Hansen [EMAIL PROTECTED] wrote in
news:[EMAIL PROTECTED]:
All true, but then Jay might get into electrical compatibility issues,
and may not realize that the output levels of RS-232 serial hardware
are not simply 0 and 5V levels, but rather +9V (or so) and -9V (and
with variations
Hi,
Some of it should be doable on windows:
http://msdn.microsoft.com/library/default.asp?url=/library/en-us/wcecoreos5/html/wce50lrfescapecommfunction.asp
Yet this might require a new wrapper module for I am not sure what the
current interface lets you do.
Not sure about Linux.
Regards;
First of all I'd like to thank all of you for your input. It's nice to
have a place to throw ideas around and get some feedback.
I think the reason the serial source code I'm using is using javax.comm
stuff which is possibly part of Jython is because I'm on Mac OS X.
However this is just my
[EMAIL PROTECTED] [EMAIL PROTECTED] wrote:
While I realize this is more on a driver/hardware level it's
interesting that it's so difficult to use a different protocol for an
existing driver. For example, all serial does is a series of high and
low voltages on specific pins. Why should it be
ahhh I understand now
--
http://mail.python.org/mailman/listinfo/python-list
[EMAIL PROTECTED] wrote:
I want to write to the pins of an RS232 without using the serial
protocol. The use would be every pin could act to complete a circuit
in customized hardware. I could use python to communicate serially to
a BASIC stamp or a Javelin stamp and then use the stamp to set
I want to write to the pins of an RS232 without using the serial
protocol. The use would be every pin could act to complete a circuit
in customized hardware. I could use python to communicate serially to
a BASIC stamp or a Javelin stamp and then use the stamp to set however
many pins as 0's or
In article [EMAIL PROTECTED],
[EMAIL PROTECTED] [EMAIL PROTECTED] wrote:
I want to write to the pins of an RS232 without using the serial
protocol. The use would be every pin could act to complete a circuit
in customized hardware. I could use python to communicate serially to
a BASIC stamp
[EMAIL PROTECTED] wrote:
I want to write to the pins of an RS232 without using the serial
protocol. The use would be every pin could act to complete a circuit
in customized hardware. I could use python to communicate serially to
a BASIC stamp or a Javelin stamp and then use the stamp to set
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