This adds NOR-style masking emulation to emubd when erase_value is set
to -2:
erase => 0xff
prog 0xf0 => 0xf0
prog 0xcc => 0xc0
We do _not_ rely on this property in littlefs, and so this feature will
probably go unused in our tests, but it's useful for running other
filesystems (SPIFFS) on top of emubd.
It may be a bit of a scope violation to merge this into littlefs's core
repo, but it's useful to centralize emubd's features somewhere...
Note this includes both the lfs3_config -> lfs3_cfg structs as well as
the LFS3_CONFIG -> LFS3_CFG include define:
- LFS3_CONFIG -> LFS3_CFG
- struct lfs3_config -> struct lfs3_cfg
- struct lfs3_file_config -> struct lfs3_file_cfg
- struct lfs3_*bd_config -> struct lfs3_*bd_cfg
- cfg -> cfg
We were already using cfg as the variable name everywhere. The fact that
these names were different was an inconsistency that should be fixed
since we're committing to an API break.
LFS3_CFG is already out-of-date from upstream, and there's plans for a
config rework, but I figured I'd go ahead and change it as well to lower
the chances it gets overlooked.
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Note this does _not_ affect LFS3_TAG_CONFIG. Having the on-disk vs
driver-level config take slightly different names is not a bad thing.
Christopher Haster