Can Python serial support run at 45.45 baud?
nagle at animats.com
Sun Feb 15 13:35:26 EST 2009
John Nagle wrote:
> MRAB wrote:
>> John Nagle wrote:
>>> 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.
More information about the Python-list