swym authored 5 years ago and rahix committed 5 years ago

usb/epc_usb
====
Contains device-independent USB implementation, services MAXUSB stack
and is given the actual USB descriptors & callbacks on initialization.
Handles USB events and configures/deconfigures the device accordingly
during the USB setup procedure.

usb/mass_storage & cdcacm
====
Contain device-specific implementations, service MAXUSB's device class
APIs for cdcacm and mass storage.
Here, mass storage is independent of the underlying storage device.

modules/usb
====
Public apic_usb API, configuration and storage device management.
Defines the actual USB device descriptors and services the upc_usb API.

If we want to add SD card functionality, this would be the place to add
it.

Signed-off-by: Rahix <rahix@rahix.de>

swym authored 5 years ago and rahix committed 5 years ago

This commit adds 3 new API calls

- epic_file_opendir()
- epic_file_readdir()
- epic_file_unlink()

and 2 new functions in Pycardium

- os.listdir()
- os.unlink()

swym authored 5 years ago and rahix committed 5 years ago

- Implement de-initialization
- Wrap filesystem operations in semaphore
- Introduce EpicFileSystem object and move epic_file_FOO(...)
  imlementations into efs_FOO(EpicFileSystem*, ...) functions.
- epic_file_FOO(...) functions are now wrappers around the _fs_
  functions, but lock and unlock the global filesystem object before &
  after calls.  This way, all efs_ functions can assume that the
  necessary lock has been acquired.
- libff: don't use FF_FS_REENTRANT, our own FS lock is enough