Hi,
On Sun, Oct 16, 2016 at 06:25:26PM +0200, Gerhard Sittig wrote:
> Stick with the "one data byte per UART frame" approach for frames which
> carry 5 to 8 data bits. But send two bytes per UART frames (big endian
> representation) for configurations with 9 data bits.
>
> This addresses Bug 708, passing values greater than 255 to the bytes()
> Python routine broke execution of the decoder. The proposed patch to
> replace bytes() by bin() is not desirable as it generates variable width
> output. Using format "{:09b}" is not desirable either as it's rather
> verbose for a binary output stream, and (rather unexpectedly) switches
> from a byte stream output to ASCII characters to represent individual
> bits. Switching from one byte to two bytes (and only when required) is
> the least intrusive approach, i.e. the least of all available evils.
> Generating 16bit output data for input data which exceeds the 8bit space
> should be most acceptable.
Yup, agreed. I had a similar patch in the queue already, which basically
does the same thing by using to_bytes(), which is now merged.
(also another one for SPI, which had a similar bug, #686)
I updated the sigrok-test repo with a few test-cases to check this, but
please let me know if there are any regressions with this method
compared to your approach.
Thanks, Uwe.
--
http://hermann-uwe.de | http://randomprojects.org | http://sigrok.org
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