* Change from 40 FC to 72 FC as default delay between detecting LIW and sending the command.
* Use parity for ID, UM1, and UM2 commands
* Remove extra bit hack from AUTH, PIN, and WRITE commands
1. Rework how communications with tag occur.
a. bitstream to be sent to the tag is now fully pre-generated.
b. bits sent and received are logged with start / end times.
2. Support built-in `hw dbg` for controlling verbosity of debug output
The new bitstream generation and logging has exposed a surprising legacy behavior ... each of the command that sent additional data (beyond the command) were:
* inserting an extra RM zero bit
* force-enabling command parity is used
This was not expected. However, this PR maintains the behavior of the existing code.
TODO: Root-cause why the third RM bit is needed. Fix code to remove that hack.
TODO: change the arm/client interface to ONLY use arrays of bytes, with well-defined content endianness, to avoid this problem.
since this is somekind of work in progress, I'm still going for a PR.
This commit is reworking some comments and making the code stable
(at least as good es or better as before).
Also made als const as #define
first steps in understading and optimizing this function.
replace != with < - if we don't poll fast enough, it is possible that
the condition != is missed.
still not done with DemodPCF7931(). But now including changes in ReadPCF7931().
They work tightly together.
Trying to resolve some issues and bugs. Basically it seems to work and
my results are consistent. However, they still deviate from what I get if
I do analyze the signal using lf read and data commands.
still some issues somewhere.
demod function now seems to work basically. Not all error cases are handled I guess.
Also still debug prints, since I've to figure out the rest.
Also unclear, why limit the buffer size to 1-2 blocks only?
