Merge pull request ARMmbed#13 from ARMmbed/david_erase_value

Implement the get_erase_value function
geky · Apr 12, 2018 · 97e27cd · 97e27cd
2 parents 5249645 + d46ad65
commit 97e27cd
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diff --git a/SPIFBlockDevice.cpp b/SPIFBlockDevice.cpp
@@ -333,3 +333,8 @@ bd_size_t SPIFBlockDevice::size() const
 {
     return _size;
 }
+
+int SPIFBlockDevice::get_erase_value() const
+{
+    return 0xFF;
+}
diff --git a/SPIFBlockDevice.h b/SPIFBlockDevice.h
@@ -130,6 +130,17 @@ class SPIFBlockDevice : public BlockDevice {
      */
     virtual bd_size_t get_erase_size() const;
 
+    /** Get the value of storage when erased
+     *
+     *  If get_erase_value returns a non-negative byte value, the underlying
+     *  storage is set to that value when erased, and storage containing
+     *  that value can be programmed without another erase.
+     *
+     *  @return         The value of storage when erased, or -1 if you can't
+     *                  rely on the value of erased storage
+     */
+    virtual int get_erase_value() const;
+
     /** Get the total size of the underlying device
      *
      *  @return         Size of the underlying device in bytes