AP_HAL: added erase() method to Storage class

libraries/AP_HAL/Storage.cpp

@@ -0,0 +1,17 @@
+#include "AP_HAL.h"
+#include "Storage.h"
+#include <AP_Math/AP_Math.h>
+
+/*
+  default erase method
+ */
+bool AP_HAL::Storage::erase(void)
+{
+    uint8_t blk[16] {};
+    uint32_t ofs;
+    for (ofs=0; ofs<HAL_STORAGE_SIZE; ofs += sizeof(blk)) {
+        uint32_t n = MIN(sizeof(blk), HAL_STORAGE_SIZE - ofs);
+        write_block(ofs, blk, n);
+    }
+    return true;
+}

libraries/AP_HAL/Storage.h

@@ -6,6 +6,7 @@
 class AP_HAL::Storage {
 public:
     virtual void init() = 0;
+    virtual bool erase();
     virtual void read_block(void *dst, uint16_t src, size_t n) = 0;
     virtual void write_block(uint16_t dst, const void* src, size_t n) = 0;
     virtual void _timer_tick(void) {};