.. there is an instance of it that looks like a "true positive", but it only
affects sdhc transfers that are not a multiple of 4 bytes, which I don't think
happens. (sd card blocks are always 512 bytes) I can fix this in our
asf4 repo but that would mean this should be deferred until after #3384 is
merged, since that also touches asf4 very invasively by adding a whole new
chip family.
If any diagnostics occur, we will want to either add `/* FALLTHROUGH */`
or `break;` as appropriate. I only tested a few builds (trinket m0
and metro m4 express)
While checking whether we can enable -Wimplicit-fallthrough, I encountered
a diagnostic in mp_binary_set_val_array_from_int which led to discovering
the following bug:
```
>>> struct.pack("xb", 3)
b'\x03\x03'
```
That is, the next value (3) was used as the value of a padding byte, while
standard Python always fills "x" bytes with zeros. I initially thought
this had to do with the unintentional fallthrough, but it doesn't.
Instead, this code would relate to an array.array with a typecode of
padding ('x'), which is ALSO not desktop Python compliant:
```
>>> array.array('x', (1, 2, 3))
array('x', [1, 0, 0])
```
Possibly this is dead code that used to be shared between struct-setting
and array-setting, but it no longer is.
I also discovered that the argument list length for struct.pack
and struct.pack_into were not checked, and that the length of binary data
passed to array.array was not checked to be a multiple of the element
size.
I have corrected all of these to conform more closely to standard Python
and revised some tests where necessary. Some tests for micropython-specific
behavior that does not conform to standard Python and is not present
in CircuitPython was deleted outright.
Limor confirmed that the all shipping revisions starting with Rev D had QSPI flash chips installed.
Note that when neither EXTERNAL_FLASH_QSPI_SINGLE nor EXTERNAL_FLASH_QSPI_DUAL is specified quad mode is assumed, so this is addressed by removing the setting altogether.
Two problems: The lead byte for 3-byte sequences was wrong, and one
mid-byte was not even filled in due to a missing "++"!
Apparently this was broken ever since the first "Compress as unicode,
not bytes" commit, but I believed I'd "tested" it by running on the
Pinyin translation.
This rendered at least the Korean and Japanese translations completely
illegible, affecting 5.0 and all later releases.
Jeff Epler
Limor "Ladyada" Fried
Jeff Epler
Hosted Weblate
Scott Shawcroft
root
Kevin Matocha
Dan Halbert
Scott Shawcroft
Jerry Needell
Jelle Jager
hierophect
microDev
Jonny Bergdahl
DavePutz