StorageManager: add read_float and write_float

libraries/StorageManager/StorageManager.cpp

@@ -265,6 +265,16 @@ uint32_t StorageAccess::read_uint32(uint16_t loc) const
     return v;
 }
 
+/*
+  read a float
+ */
+float StorageAccess::read_float(uint16_t loc) const
+{
+    float v;
+    read_block(&v, loc, sizeof(v));
+    return v;
+}
+
 /*
   write a byte
  */
@@ -289,6 +299,14 @@ void StorageAccess::write_uint32(uint16_t loc, uint32_t value) const
     write_block(loc, &value, sizeof(value));
 }
 
+/*
+  write a float
+ */
+void StorageAccess::write_float(uint16_t loc, float value) const
+{
+    write_block(loc, &value, sizeof(value));
+}
+
 /*
   copy one area to another
  */

libraries/StorageManager/StorageManager.h

@@ -95,11 +95,13 @@ public:
     uint8_t  read_uint8(uint16_t loc) const { return read_byte(loc); }
     uint16_t read_uint16(uint16_t loc) const;
     uint32_t read_uint32(uint16_t loc) const;
+    float read_float(uint16_t loc) const;
 
     void write_byte(uint16_t loc, uint8_t value) const;
     void write_uint8(uint16_t loc, uint8_t value) const { return write_byte(loc, value); }
     void write_uint16(uint16_t loc, uint16_t value) const;
     void write_uint32(uint16_t loc, uint32_t value) const;
+    void write_float(uint16_t loc, float value) const;
 
     // copy from one storage area to another
     bool copy_area(const StorageAccess &source) const;