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diff --git a/quantum/serial_link/tests/frame_router_tests.cpp b/quantum/serial_link/tests/frame_router_tests.cpp
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+/*
+The MIT License (MIT)
+
+Copyright (c) 2016 Fred Sundvik
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
+*/
+
+#include "gtest/gtest.h"
+#include "gmock/gmock.h"
+#include <array>
+extern "C" {
+ #include "serial_link/protocol/transport.h"
+ #include "serial_link/protocol/byte_stuffer.h"
+ #include "serial_link/protocol/frame_router.h"
+}
+
+using testing::_;
+using testing::ElementsAreArray;
+using testing::Args;
+
+class FrameRouter : public testing::Test {
+public:
+ FrameRouter() :
+ current_router_buffer(nullptr)
+ {
+ Instance = this;
+ init_byte_stuffer();
+ }
+
+ ~FrameRouter() {
+ Instance = nullptr;
+ }
+
+ void send_data(uint8_t link, const uint8_t* data, uint16_t size) {
+ auto& buffer = current_router_buffer->send_buffers[link];
+ std::copy(data, data + size, std::back_inserter(buffer));
+ }
+
+ void receive_data(uint8_t link, uint8_t* data, uint16_t size) {
+ int i;
+ for(i=0;i<size;i++) {
+ byte_stuffer_recv_byte(link, data[i]);
+ }
+ }
+
+ void activate_router(uint8_t num) {
+ current_router_buffer = router_buffers + num;
+ router_set_master(num==0);
+ }
+
+ void simulate_transport(uint8_t from, uint8_t to) {
+ activate_router(to);
+ if (from > to) {
+ receive_data(DOWN_LINK,
+ router_buffers[from].send_buffers[UP_LINK].data(),
+ router_buffers[from].send_buffers[UP_LINK].size());
+ }
+ else if(to > from) {
+ receive_data(UP_LINK,
+ router_buffers[from].send_buffers[DOWN_LINK].data(),
+ router_buffers[from].send_buffers[DOWN_LINK].size());
+ }
+ }
+
+ MOCK_METHOD3(transport_recv_frame, void (uint8_t from, uint8_t* data, uint16_t size));
+
+ std::vector<uint8_t> received_data;
+
+ struct router_buffer {
+ std::vector<uint8_t> send_buffers[2];
+ };
+
+ router_buffer router_buffers[8];
+ router_buffer* current_router_buffer;
+
+ static FrameRouter* Instance;
+};
+
+FrameRouter* FrameRouter::Instance = nullptr;
+
+
+typedef struct {
+ std::array<uint8_t, 4> data;
+ uint8_t extra[16];
+} frame_buffer_t;
+
+
+extern "C" {
+ void send_data(uint8_t link, const uint8_t* data, uint16_t size) {
+ FrameRouter::Instance->send_data(link, data, size);
+ }
+
+
+ void transport_recv_frame(uint8_t from, uint8_t* data, uint16_t size) {
+ FrameRouter::Instance->transport_recv_frame(from, data, size);
+ }
+}
+
+TEST_F(FrameRouter, master_broadcast_is_received_by_everyone) {
+ frame_buffer_t data;
+ data.data = {0xAB, 0x70, 0x55, 0xBB};
+ activate_router(0);
+ router_send_frame(0xFF, (uint8_t*)&data, 4);
+ EXPECT_GT(router_buffers[0].send_buffers[DOWN_LINK].size(), 0);
+ EXPECT_EQ(router_buffers[0].send_buffers[UP_LINK].size(), 0);
+ EXPECT_CALL(*this, transport_recv_frame(0, _, _))
+ .With(Args<1, 2>(ElementsAreArray(data.data)));
+ simulate_transport(0, 1);
+ EXPECT_GT(router_buffers[1].send_buffers[DOWN_LINK].size(), 0);
+ EXPECT_EQ(router_buffers[1].send_buffers[UP_LINK].size(), 0);
+
+ EXPECT_CALL(*this, transport_recv_frame(0, _, _))
+ .With(Args<1, 2>(ElementsAreArray(data.data)));
+ simulate_transport(1, 2);
+ EXPECT_GT(router_buffers[2].send_buffers[DOWN_LINK].size(), 0);
+ EXPECT_EQ(router_buffers[2].send_buffers[UP_LINK].size(), 0);
+}
+
+TEST_F(FrameRouter, master_send_is_received_by_targets) {
+ frame_buffer_t data;
+ data.data = {0xAB, 0x70, 0x55, 0xBB};
+ activate_router(0);
+ router_send_frame((1 << 1) | (1 << 2), (uint8_t*)&data, 4);
+ EXPECT_GT(router_buffers[0].send_buffers[DOWN_LINK].size(), 0);
+ EXPECT_EQ(router_buffers[0].send_buffers[UP_LINK].size(), 0);
+
+ simulate_transport(0, 1);
+ EXPECT_GT(router_buffers[1].send_buffers[DOWN_LINK].size(), 0);
+ EXPECT_EQ(router_buffers[1].send_buffers[UP_LINK].size(), 0);
+
+ EXPECT_CALL(*this, transport_recv_frame(0, _, _))
+ .With(Args<1, 2>(ElementsAreArray(data.data)));
+ simulate_transport(1, 2);
+ EXPECT_GT(router_buffers[2].send_buffers[DOWN_LINK].size(), 0);
+ EXPECT_EQ(router_buffers[2].send_buffers[UP_LINK].size(), 0);
+
+ EXPECT_CALL(*this, transport_recv_frame(0, _, _))
+ .With(Args<1, 2>(ElementsAreArray(data.data)));
+ simulate_transport(2, 3);
+ EXPECT_GT(router_buffers[3].send_buffers[DOWN_LINK].size(), 0);
+ EXPECT_EQ(router_buffers[3].send_buffers[UP_LINK].size(), 0);
+}
+
+TEST_F(FrameRouter, first_link_sends_to_master) {
+ frame_buffer_t data;
+ data.data = {0xAB, 0x70, 0x55, 0xBB};
+ activate_router(1);
+ router_send_frame(0, (uint8_t*)&data, 4);
+ EXPECT_GT(router_buffers[1].send_buffers[UP_LINK].size(), 0);
+ EXPECT_EQ(router_buffers[1].send_buffers[DOWN_LINK].size(), 0);
+
+ EXPECT_CALL(*this, transport_recv_frame(1, _, _))
+ .With(Args<1, 2>(ElementsAreArray(data.data)));
+ simulate_transport(1, 0);
+ EXPECT_EQ(router_buffers[0].send_buffers[DOWN_LINK].size(), 0);
+ EXPECT_EQ(router_buffers[0].send_buffers[UP_LINK].size(), 0);
+}
+
+TEST_F(FrameRouter, second_link_sends_to_master) {
+ frame_buffer_t data;
+ data.data = {0xAB, 0x70, 0x55, 0xBB};
+ activate_router(2);
+ router_send_frame(0, (uint8_t*)&data, 4);
+ EXPECT_GT(router_buffers[2].send_buffers[UP_LINK].size(), 0);
+ EXPECT_EQ(router_buffers[2].send_buffers[DOWN_LINK].size(), 0);
+
+ simulate_transport(2, 1);
+ EXPECT_GT(router_buffers[1].send_buffers[UP_LINK].size(), 0);
+ EXPECT_EQ(router_buffers[1].send_buffers[DOWN_LINK].size(), 0);
+
+ EXPECT_CALL(*this, transport_recv_frame(2, _, _))
+ .With(Args<1, 2>(ElementsAreArray(data.data)));
+ simulate_transport(1, 0);
+ EXPECT_EQ(router_buffers[0].send_buffers[DOWN_LINK].size(), 0);
+ EXPECT_EQ(router_buffers[0].send_buffers[UP_LINK].size(), 0);
+}
+
+TEST_F(FrameRouter, master_sends_to_master_does_nothing) {
+ frame_buffer_t data;
+ data.data = {0xAB, 0x70, 0x55, 0xBB};
+ activate_router(0);
+ router_send_frame(0, (uint8_t*)&data, 4);
+ EXPECT_EQ(router_buffers[0].send_buffers[UP_LINK].size(), 0);
+ EXPECT_EQ(router_buffers[0].send_buffers[DOWN_LINK].size(), 0);
+}
+
+TEST_F(FrameRouter, link_sends_to_other_link_does_nothing) {
+ frame_buffer_t data;
+ data.data = {0xAB, 0x70, 0x55, 0xBB};
+ activate_router(1);
+ router_send_frame(2, (uint8_t*)&data, 4);
+ EXPECT_EQ(router_buffers[1].send_buffers[UP_LINK].size(), 0);
+ EXPECT_EQ(router_buffers[1].send_buffers[DOWN_LINK].size(), 0);
+}
+
+TEST_F(FrameRouter, master_receives_on_uplink_does_nothing) {
+ frame_buffer_t data;
+ data.data = {0xAB, 0x70, 0x55, 0xBB};
+ activate_router(1);
+ router_send_frame(0, (uint8_t*)&data, 4);
+ EXPECT_GT(router_buffers[1].send_buffers[UP_LINK].size(), 0);
+ EXPECT_EQ(router_buffers[1].send_buffers[DOWN_LINK].size(), 0);
+
+ EXPECT_CALL(*this, transport_recv_frame(_, _, _))
+ .Times(0);
+ activate_router(0);
+ receive_data(UP_LINK,
+ router_buffers[1].send_buffers[UP_LINK].data(),
+ router_buffers[1].send_buffers[UP_LINK].size());
+ EXPECT_EQ(router_buffers[0].send_buffers[UP_LINK].size(), 0);
+ EXPECT_EQ(router_buffers[0].send_buffers[DOWN_LINK].size(), 0);
+}
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