UART refactored (#236)

`Uart` is now an abstract class with a `UartEsp` and a `UartPosix` implementation.

TactilityHeadless/Private/Tactility/hal/uart/UartEsp.h

@@ -0,0 +1,38 @@
+#pragma once
+#ifdef ESP_PLATFORM
+
+#include "Tactility/Mutex.h"
+#include "Tactility/hal/uart/Uart.h"
+#include "Tactility/hal/uart/Configuration.h"
+
+namespace tt::hal::uart {
+
+class UartEsp final : public Uart {
+
+private:
+
+    Mutex mutex;
+    const Configuration& configuration;
+    bool started = false;
+
+public:
+
+    explicit UartEsp(const Configuration& configuration) : configuration(configuration) {}
+
+    bool start() final;
+    bool isStarted() const final;
+    bool stop() final;
+    size_t readBytes(std::byte* buffer, size_t bufferSize, TickType_t timeout) final;
+    bool readByte(std::byte* output, TickType_t timeout) final;
+    size_t writeBytes(const std::byte* buffer, size_t bufferSize, TickType_t timeout) final;
+    size_t available(TickType_t timeout) final;
+    bool setBaudRate(uint32_t baudRate, TickType_t timeout) final;
+    uint32_t getBaudRate() final;
+    void flushInput() final;
+};
+
+std::unique_ptr<Uart> create(const Configuration& configuration);
+
+} // namespace tt::hal::uart
+
+#endif

TactilityHeadless/Private/Tactility/hal/uart/UartPosix.h

@@ -0,0 +1,47 @@
+#pragma once
+#ifndef ESP_PLATFORM
+
+#include "Tactility/Mutex.h"
+#include "Tactility/hal/uart/Configuration.h"
+#include "Tactility/hal/uart/Uart.h"
+
+#include <termios.h>
+
+namespace tt::hal::uart {
+
+class UartPosix final : public Uart {
+
+private:
+    struct AutoCloseFileDeleter {
+        void operator()(FILE* file) {
+            fclose(file);
+        }
+    };
+
+    Mutex mutex;
+    const Configuration& configuration;
+    std::unique_ptr<FILE, AutoCloseFileDeleter> device;
+
+    bool awaitAvailable(TickType_t timeout);
+
+public:
+
+    explicit UartPosix(const Configuration& configuration) : configuration(configuration) {}
+
+    bool start() final;
+    bool isStarted() const final;
+    bool stop() final;
+    size_t readBytes(std::byte* buffer, size_t bufferSize, TickType_t timeout) final;
+    bool readByte(std::byte* output, TickType_t timeout) final;
+    size_t writeBytes(const std::byte* buffer, size_t bufferSize, TickType_t timeout) final;
+    size_t available(TickType_t timeout) final;
+    bool setBaudRate(uint32_t baudRate, TickType_t timeout) final;
+    uint32_t getBaudRate() final;
+    void flushInput() final;
+};
+
+std::unique_ptr<Uart> create(const Configuration& configuration);
+
+} // namespace tt::hal::uart
+
+#endif