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Move initialization code of protocol decoders from the constructor to a
new reset() helper method. The libsigrokdecode backend could run this
method several times to clear the decoder's internal state, before new
data from another acquisition gets fed to decode() calls.
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Check for the availability of a samplerate specification, but don't
abort in its absence. Lack of the samplerate only prevents the emission
of throughput annotations, but still allows decoding the clocked signal.
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Eliminate more instances where Python code tracked signal changes instead
of having common library code do the work. Reduce the number of boundary
crossings between library and decoder code (Python vs C), by inspecting
fewer input edges. Yet cope with the CS signal's being optional. Emit
identical annotations to the previous implementation for CS changes,
including the initial change "from None to 0/1". Sort the checks for
optional input signals at the top of decode() into a more natural order.
Improve and update comments.
This commit results in a more appropriate use of the PD v3 API in the
SPI protocol decoder.
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Have edges detected in common library code. Move the test for presence
of optional channels out of the decode loop. Do inspect the very first
sample for pixel compatibility with the previous implementation.
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Remove the FSF postal address as it might change (it did in the past).
Reference the gnu.org website instead which is more stable.
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For wordsizes > 8, multiple bytes are used (big-endian).
This fixes bug #686.
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This is more consistent with annotation syntax and looks slightly
better in most cases.
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Avoid decoding and outputting data from the SPI bus if the CS pin
hasn't been asserted. This avoids confusing both users and stacked
decoders which otherwise end up seeing traffic intended for other
chips (or just noise).
Note: The old behavior of decoding all traffic is still in place if
no CS pin has been wired up to the decoder.
This fixes bug #559.
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This fixes bug #424.
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This could previously be detected by the absence of a CS-CHANGE packet
before the first data packet, but it makes the stacked decoder simpler
if it is told directly.
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Use self.ss/self.es, or if there's a need to differentiate
them a bit more, use self.ss_<suffix>/self.es_<suffix> consistently.
Also, drop some unused variables.
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Anything else in the pd.py files doesn't have to be imported/exposed.
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Drop them from the libsigrokdecode repository.
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Rename the old MissingDataError to the clearer ChannelError. Also, add
ChannelError in the UART decoder.
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- No newlines at the end of files.
- No trailing ';' characters.
- Comparison with None: Use 'is None' or 'is not None'.
- Comparison with True/False: Use 'if cond:' or 'if not cond:'.
- Various minor whitespace fixes.
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Also, use the "if not self.samplerate" form, which catches both the case
where self.samplerate is None, as well as the case where it is 0.
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Older libsigrokdecode versions are no longer able to use the current
versions of the PDs (various changes in syntax etc).
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Variables of type 'struct srd_channel *' are consistently named 'pdch' to
make them easily distinguishable from libsigrok's 'struct sr_channel *'
variables that are consistently named 'ch'.
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Annotation entries also consist of a tuple, not a list.
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Each option consists of a dictionary with the following keys:
id The option id, which is passed in when setting a value.
desc A description of the option, suitable for display.
def The default value for this option.
values (optional) If present, a tuple containing values the option
may take. They must be of the same type as the default.
Valid types for the options are UTF-8-encoded strings, integers, and
floating point values.
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This fixes the data/annotations of stacked PDs.
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This makes things a bit easier/clearer for most stacked PDs.
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This can be used by higher-level PDs to decode per-bit items (not just
based on whole datawords).
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The output type is now called OUTPUT_PYTHON, adapt all PDs to that.
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This fixes bug #175.
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