John Nagle wrote:
MRAB wrote:
John Nagle wrote:
[snip]
So the correct combination, 5 bits with 1.5 stop bits, isn't
supported in
Python. 1 stop bit will not physically work on Baudot teletypes; the
main camshaft doesn't come around fast enough. (Yes, there's an actual
mechanical reason for 1.5 stop bits.) Requesting 2 stop bits at the
Python level gets a reject at the Win32 level. (Not sure why Win32
doesn't allow that; extra stop bits just add delay, but don't hurt
anything. But it's not supported.)
I patched PySerial to support "STOPBITS_ONE5", for 1.5 stop bits,
and the big Teletype Model 15 is now banging out text from Python.
Logged in as a PySerial bug, with discussion of fix:
[ 2603052 ] 5-bit mode not properly supported on Windows
Linux support for nonstandard baud rates is possible, but needs a
call to "setserial", which is not standard POSIX.
John Nagle
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