Remake folder structure, add messaging library start

CMakeLists.txt

@@ -7,8 +7,10 @@ set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wall -Wextra")
 
 option(WITH_TESTS "Enable unit testing." OFF)
 
+add_subdirectory(Utility)
+add_subdirectory(Messaging)
+
 if(WITH_TESTS)
     enable_testing()
-endif()
-
-add_subdirectory(Utility)
+    add_subdirectory(Tests)
+endif()

Messaging/CMakeLists.txt

@@ -0,0 +1,10 @@
+cmake_minimum_required(VERSION 3.14 FATAL_ERROR)
+
+add_library(messaging INTERFACE)
+
+add_library(skullc::messaging ALIAS messaging)
+
+target_include_directories(messaging
+    INTERFACE
+        ${CMAKE_CURRENT_SOURCE_DIR}/Inc
+)

Messaging/Inc/messaging_packet.hpp

@@ -0,0 +1,72 @@
+/*
+ * messaging_packet.hpp
+ *
+ *  Created on: Mar 27, 2021
+ *      Author: erki
+ */
+
+#ifndef MESSAGING_INC_MESSAGING_PACKET_HPP_
+#define MESSAGING_INC_MESSAGING_PACKET_HPP_
+
+#include <cstring>
+#include <cstdint>
+
+namespace Messaging
+{
+
+template<size_t N>
+struct Packet
+{
+  static constexpr std::uint8_t preamble[] = { 'A', 'A' };
+  std::uint8_t data[N];
+  std::uint32_t data_length = 0;
+
+  const std::uint32_t max_data_length = N;
+  const std::uint32_t preamble_length = sizeof(preamble);
+  const std::uint32_t data_length_length = sizeof(data_length);
+
+  bool serialize(std::uint8_t* buffer, const std::uint32_t max_length)
+  {
+    const std::uint32_t required_size = preamble_length + data_length_length + data_length;
+
+    if (max_length < required_size)
+      return false;
+
+    std::memcpy(buffer, preamble, preamble_length);
+    buffer += preamble_length;
+
+    std::memcpy(buffer, &data_length, data_length_length);
+    buffer += data_length_length;
+
+    std::memcpy(buffer, data, data_length);
+
+    return true;
+  }
+
+  bool deserialize(std::uint8_t* buffer, const std::uint32_t length)
+  {
+    const std::uint32_t header_length = preamble_length + data_length_length;
+
+    if (length < header_length)
+      return false;
+
+    if (std::memcmp(buffer, preamble, preamble_length) != 0)
+      return false;
+
+    std::memcpy(&data_length, buffer + preamble_length, preamble_length);
+
+    const std::uint32_t final_length = header_length + data_length;
+
+    if (length != final_length)
+      return false;
+
+    std::memcpy(data, buffer + header_length, data_length);
+
+    return true;
+  }
+};
+
+}
+
+
+#endif /* MESSAGING_INC_MESSAGING_PACKET_HPP_ */

Peripherals/Inc/peripherals_serial.hpp

@@ -0,0 +1,35 @@
+/*
+ * peripherals_serial.hpp
+ *
+ *  Created on: Mar 22, 2021
+ *      Author: erki
+ */
+
+#ifndef SKULLC_PERIPHERALS_SERIAL_HPP_
+#define SKULLC_PERIPHERALS_SERIAL_HPP_
+
+#include <cstdint>
+
+namespace Peripherals
+{
+
+template<typename HT, HT* Handle,
+         void (*tx_function)(HT*, char*, std::uint32_t),
+         void (*rx_function)(HT*, char*, std::uint32_t)>
+struct SerialPeripheral
+{
+  void transmit(char* data, const std::uint32_t data_length)
+  {
+    tx_function(handle, data, data_length);
+  }
+
+  void receive(char* output, const std::uint32_t data_length)
+  {
+    rx_function(handle, data, data_length);
+  }
+};
+
+}
+
+
+#endif /* SKULLC_PERIPHERALS_SERIAL_HPP_ */

Tests/CMakeLists.txt

@@ -0,0 +1,18 @@
+cmake_minimum_required(VERSION 3.14 FATAL_ERROR)
+
+find_package(Catch2 REQUIRED)
+
+add_executable(tests
+    main.cpp
+    ringbuffer.cpp
+)
+
+target_link_libraries(tests
+    PUBLIC
+        skullc::utility
+        Catch2::Catch2
+)
+
+include(CTest)
+include(Catch)
+catch_discover_tests(tests)

Utility/CMakeLists.txt

@@ -10,24 +10,3 @@ target_include_directories(utility
     PUBLIC
         ${CMAKE_CURRENT_SOURCE_DIR}/Inc
 )
-
-if(WITH_TESTS)
-
-find_package(Catch2 REQUIRED)
-
-add_executable(utility-tests
-    Tests/main.cpp
-    Tests/ringbuffer.cpp
-)
-
-target_link_libraries(utility-tests
-    PUBLIC
-        skullc::utility
-        Catch2::Catch2
-)
-
-include(CTest)
-include(Catch)
-catch_discover_tests(utility-tests)
-
-endif()