added basic code

1 files changed, 90 insertions, 0 deletions

diff --git a/arduino/libraries/FileSystem/src/ExternalFS.h b/arduino/libraries/FileSystem/src/ExternalFS.h
new file mode 100755
index 0000000..37d6da8
--- /dev/null
+++ b/arduino/libraries/FileSystem/src/ExternalFS.h
@@ -0,0 +1,90 @@
+/**************************************************************************/
+/*!
+    @file     ExternalFS.h
+    @author   hathach (tinyusb.org)
+
+    @section LICENSE
+
+    Software License Agreement (BSD License)
+
+    Copyright (c) 2018, Adafruit Industries (adafruit.com)
+    All rights reserved.
+
+    Redistribution and use in source and binary forms, with or without
+    modification, are permitted provided that the following conditions are met:
+    1. Redistributions of source code must retain the above copyright
+    notice, this list of conditions and the following disclaimer.
+    2. Redistributions in binary form must reproduce the above copyright
+    notice, this list of conditions and the following disclaimer in the
+    documentation and/or other materials provided with the distribution.
+    3. Neither the name of the copyright holders nor the
+    names of its contributors may be used to endorse or promote products
+    derived from this software without specific prior written permission.
+
+    THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ''AS IS'' AND ANY
+    EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+    WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+    DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE FOR ANY
+    DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+    (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+    LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
+    ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+    (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+    SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+*/
+/**************************************************************************/
+
+#ifndef EXTERNALFS_H_
+#define EXTERNALFS_H_
+
+#include "Bluefruit_FileIO.h"
+
+// External Flash uses Fat FS as file system
+// http://elm-chan.org/fsw/ff/00index_e.html
+#include "fatfs/source/ff.h"
+
+class FatFS: public BluefruitFS::FileSystemClass
+{
+  public:
+    FatFS ();
+    virtual ~FatFS ();
+
+    bool begin (void);
+    BluefruitFS::File open (char const *filepath, uint8_t mode = FILE_READ);
+    bool exists (char const *filepath);
+    bool mkdir (char const *filepath);
+    bool remove (char const *filepath);
+    bool rmdir (char const *filepath);
+    bool rmdir_r (char const *filepath);
+    bool format (bool eraseall);
+
+    // Internal API: shouldn't be used by Arduino sketch
+    virtual size_t _f_write (void* fhdl, uint8_t const *buf, size_t size);
+    virtual int _f_read (void* fhdl, void *buf, uint16_t nbyte);
+    virtual void _f_flush (void* fhdl);
+    virtual void _f_close (void* fhdl, bool is_dir);
+    virtual bool _f_seek (void* fhdl, uint32_t pos);
+    virtual uint32_t _f_position (void* fhdl);
+    virtual uint32_t _f_size (void* fhdl);
+
+    virtual BluefruitFS::File _f_openNextFile (void* fhdl, char const* cwd, uint8_t mode);
+    virtual void _f_rewindDirectory (void* fhdl);
+
+    // called when Flash contents is changed out of the awareness of ExternalFS such as USB MSC write
+    void _usbmsc_write (uint32_t lba, void const* buffer, uint32_t bufsize);
+
+  private:
+    FATFS* _fs;
+    bool _begun;
+
+    BluefruitFS::File _open_file (char const *filepath, uint8_t mode);
+    BluefruitFS::File _open_dir (char const *filepath);
+};
+
+extern FatFS ExternalFS;
+
+// C to CPP call bridge for update fatfs cached sector
+extern "C" void ExternalFS_usbmsc_write (uint32_t lba, void const* buffer, uint32_t bufsize);
+
+
+#endif /* EXTERNALFS_H_ */