HAL_Empty: added empty flash driver

libraries/AP_HAL_Empty/AP_HAL_Empty_Namespace.h

@@ -19,4 +19,5 @@ namespace Empty {
     class Storage;
     class UARTDriver;
     class Util;
+    class Flash;
 }

libraries/AP_HAL_Empty/AP_HAL_Empty_Private.h

@@ -17,3 +17,4 @@
 #include "Storage.h"
 #include "UARTDriver.h"
 #include "Util.h"
+#include "Flash.h"

libraries/AP_HAL_Empty/Flash.h

@@ -0,0 +1,14 @@
+#pragma once
+
+#include "AP_HAL_Empty.h"
+
+class Empty::Flash : public AP_HAL::Flash {
+public:
+    uint32_t getpageaddr(uint32_t page) override { return 0; }
+    uint32_t getpagesize(uint32_t page) override { return 0; }
+    uint32_t getnumpages(void) override { return 0; }
+    bool erasepage(uint32_t page) override { return false; }
+    bool write(uint32_t addr, const void *buf, uint32_t count) override { return false; }
+    void keep_unlocked(bool set) override {}
+    bool ispageerased(uint32_t page) override { return false; }
+};

libraries/AP_HAL_Empty/HAL_Empty_Class.cpp

@@ -21,6 +21,7 @@ static RCOutput rcoutDriver;
 static Scheduler schedulerInstance;
 static Util utilInstance;
 static OpticalFlow opticalFlowDriver;
+static Flash flashDriver;
 
 HAL_Empty::HAL_Empty() :
     AP_HAL::HAL(
@@ -40,7 +41,8 @@ HAL_Empty::HAL_Empty() :
         &rcoutDriver,
         &schedulerInstance,
         &utilInstance,
-        &opticalFlowDriver),
+        &opticalFlowDriver,
+        &flashDriver,
     _member(new EmptyPrivateMember(123))
 {}