BlockDevice: add get_default_instance()

Author: pennam

libraries/BlockDevices/BlockDevice.cpp

@@ -0,0 +1,26 @@
+/*
+  BlockDevice.cpp
+  Copyright (c) 2023 Arduino SA.  All right reserved.
+
+  This library is free software; you can redistribute it and/or
+  modify it under the terms of the GNU Lesser General Public
+  License as published by the Free Software Foundation; either
+  version 2.1 of the License, or (at your option) any later version.
+
+  This library is distributed in the hope that it will be useful,
+  but WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+  Lesser General Public License for more details.
+
+  You should have received a copy of the GNU Lesser General Public
+  License along with this library; if not, write to the Free Software
+  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+*/
+
+#include <QSPIFlashBlockDevice.h>
+
+BlockDevice *BlockDevice::get_default_instance()
+{
+    static QSPIFlashBlockDevice default_bd(PIN_QSPI_CLK, PIN_QSPI_SS, PIN_QSPI_D0, PIN_QSPI_D1, PIN_QSPI_D2, PIN_QSPI_D3); 
+    return &default_bd;
+}

libraries/BlockDevices/BlockDevice.h

@@ -53,6 +53,8 @@ class BlockDevice {
    BlockDevice(BlockDevice const&) = delete;
    void operator=(BlockDevice const&) = delete;
 
+   static BlockDevice *get_default_instance();
+
    virtual ~BlockDevice() = default; 
    /* initialize a block device */
    virtual int init() = 0;