From a117c22c34ed80c656214f8354c2f17abc86959c Mon Sep 17 00:00:00 2001
From: Lucas De Marchi <lucas.demarchi@intel.com>
Date: Tue, 1 Dec 2015 01:07:59 -0200
Subject: [PATCH] AP_HAL_Empty: add I2CDevice

---
 .../AP_HAL_Empty/AP_HAL_Empty_Namespace.h     |  2 +
 libraries/AP_HAL_Empty/AP_HAL_Empty_Private.h |  1 +
 libraries/AP_HAL_Empty/I2CDevice.h            | 89 +++++++++++++++++++
 3 files changed, 92 insertions(+)
 create mode 100644 libraries/AP_HAL_Empty/I2CDevice.h

diff --git a/libraries/AP_HAL_Empty/AP_HAL_Empty_Namespace.h b/libraries/AP_HAL_Empty/AP_HAL_Empty_Namespace.h
index 2c77b9c4f8..840450bbd3 100644
--- a/libraries/AP_HAL_Empty/AP_HAL_Empty_Namespace.h
+++ b/libraries/AP_HAL_Empty/AP_HAL_Empty_Namespace.h
@@ -5,6 +5,8 @@ namespace Empty {
     class AnalogSource;
     class DigitalSource;
     class GPIO;
+    class I2CDevice;
+    class I2CDeviceManager;
     class I2CDriver;
     class OpticalFlow;
     class PrivateMember;
diff --git a/libraries/AP_HAL_Empty/AP_HAL_Empty_Private.h b/libraries/AP_HAL_Empty/AP_HAL_Empty_Private.h
index e38731a4be..90eaa84b58 100644
--- a/libraries/AP_HAL_Empty/AP_HAL_Empty_Private.h
+++ b/libraries/AP_HAL_Empty/AP_HAL_Empty_Private.h
@@ -8,6 +8,7 @@
 
 #include "AnalogIn.h"
 #include "GPIO.h"
+#include "I2CDevice.h"
 #include "I2CDriver.h"
 #include "OpticalFlow.h"
 #include "PrivateMember.h"
diff --git a/libraries/AP_HAL_Empty/I2CDevice.h b/libraries/AP_HAL_Empty/I2CDevice.h
new file mode 100644
index 0000000000..d7836b4b47
--- /dev/null
+++ b/libraries/AP_HAL_Empty/I2CDevice.h
@@ -0,0 +1,89 @@
+/// -*- tab-width: 4; Mode: C++; c-basic-offset: 4; indent-tabs-mode: nil -*-
+/*
+ * Copyright (C) 2015-2016  Intel Corporation. All rights reserved.
+ *
+ * This file is free software: you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This file 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 General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+#pragma once
+
+#include <inttypes.h>
+
+#include <AP_HAL/HAL.h>
+#include <AP_HAL/I2CDevice.h>
+#include <AP_HAL/utility/OwnPtr.h>
+
+namespace Empty {
+
+class I2CDevice : public AP_HAL::I2CDevice {
+public:
+    I2CDevice()
+    {
+    }
+
+    virtual ~I2CDevice() { }
+
+    /* AP_HAL::I2CDevice implementation */
+
+    /* See AP_HAL::I2CDevice::set_address() */
+    void set_address(uint8_t address) override { }
+
+    /* See AP_HAL::I2CDevice::set_retries() */
+    void set_retries(uint8_t retries) override { }
+
+
+    /* AP_HAL::Device implementation */
+
+    /* See AP_HAL::Device::transfer() */
+    bool transfer(const uint8_t *send, uint32_t send_len,
+                  uint8_t *recv, uint32_t recv_len) override
+    {
+        return true;
+    }
+
+    bool read_registers_multiple(uint8_t first_reg, uint8_t *recv,
+                                 uint32_t recv_len, uint8_t times)
+    {
+        return true;
+    }
+
+
+    /* See AP_HAL::Device::set_speed() */
+    bool set_speed(enum AP_HAL::Device::Speed speed) override { return true; }
+
+    /* See AP_HAL::Device::get_semaphore() */
+    AP_HAL::Semaphore *get_semaphore() { return nullptr; }
+
+    /* See AP_HAL::Device::register_periodic_callback() */
+    AP_HAL::Device::PeriodicHandle *register_periodic_callback(
+        uint32_t period_usec, AP_HAL::MemberProc) override
+    {
+        return nullptr;
+    };
+
+    /* See AP_HAL::Device::get_fd() */
+    int get_fd() { return -1; }
+};
+
+class I2CDeviceManager : public AP_HAL::I2CDeviceManager {
+public:
+    I2CDeviceManager() { }
+
+    /* AP_HAL::I2CDeviceManager implementation */
+    AP_HAL::OwnPtr<AP_HAL::I2CDevice> get_device(uint8_t bus, uint8_t address)
+    {
+        return AP_HAL::OwnPtr<AP_HAL::I2CDevice>(new I2CDevice());
+    }
+};
+
+}