uart/uart.hpp

#pragma once

#include "config.hpp"
#include "hardware0.hpp"
#include "hardware1.hpp"
#include "software.hpp"

#include "../flash/flash.hpp"

#define FORCE_INLINE __attribute__((always_inline))

namespace uart {

namespace detail {

template <typename...>
struct always_false {
	static constexpr auto value = false;
};

} // namespace detail

template <class Driver>
class Uart {
  public:
	// Initialization is done upon construction
	Uart()
	{
		Driver::init();
	}

	// Moving and copying uart objects is not supported
	Uart(const Uart &) = delete;
	Uart(Uart &&) = delete;
	Uart &operator=(const Uart &) = delete;
	Uart &operator=(Uart &&) = delete;

	static void txByte(const typename Driver::data_t &byte)
	{
		Driver::txByte(byte);
	}

	static bool rxByte(typename Driver::data_t &byte)
	{
		return Driver::rxByte(byte);
	}

	static typename Driver::data_t peek()
	{
		return Driver::peek();
	}

	static void txString(const char *str)
	{
		static_assert(Driver::DATA_BITS == DataBits::EIGHT, "Strings are only supported with 8 data bits");

		while (char ch = *str++)
			txByte(ch);
	}

	static void txString(const ::detail::FlashString *str)
	{
		static_assert(Driver::DATA_BITS == DataBits::EIGHT, "Strings are only supported with 8 data bits");

		const char *strIt = reinterpret_cast<const char *>(str);

		while (char ch = pgm_read_byte(strIt++))
			txByte(ch);
	}

	//////////////////////////////////////////////////////////////////////////
	// Output stream overloads

	Uart &operator<<(const char *str)
	{
		txString(str);
		return *this;
	}

	Uart &operator<<(const ::detail::FlashString *str)
	{
		txString(str);
		return *this;
	}

	template <typename... Ts>
	Uart &operator<<(char)
	{
		static_assert(detail::always_false<Ts...>::value, "Not implemented");
	}

	template <typename... Ts>
	Uart &operator<<(unsigned char)
	{
		static_assert(detail::always_false<Ts...>::value, "Not implemented");
	}

	template <typename... Ts>
	Uart &operator<<(short)
	{
		static_assert(detail::always_false<Ts...>::value, "Not implemented");
	}

	template <typename... Ts>
	Uart &operator<<(unsigned short)
	{
		static_assert(detail::always_false<Ts...>::value, "Not implemented");
	}

	template <typename... Ts>
	Uart &operator<<(int)
	{
		static_assert(detail::always_false<Ts...>::value, "Not implemented");
	}

	template <typename... Ts>
	Uart &operator<<(unsigned int)
	{
		static_assert(detail::always_false<Ts...>::value, "Not implemented");
	}

	template <typename... Ts>
	Uart &operator<<(long)
	{
		static_assert(detail::always_false<Ts...>::value, "Not implemented");
	}

	template <typename... Ts>
	Uart &operator<<(unsigned long)
	{
		static_assert(detail::always_false<Ts...>::value, "Not implemented");
	}

	template <typename... Ts>
	Uart &operator<<(long long)
	{
		static_assert(detail::always_false<Ts...>::value, "Not implemented");
	}

	template <typename... Ts>
	Uart &operator<<(unsigned long long)
	{
		static_assert(detail::always_false<Ts...>::value, "Not implemented");
	}

	template <typename... Ts>
	Uart &operator<<(float)
	{
		static_assert(detail::always_false<Ts...>::value, "Not implemented");
	}

	template <typename... Ts>
	Uart &operator<<(double)
	{
		static_assert(detail::always_false<Ts...>::value, "Not implemented");
	}

	template <typename... Ts>
	Uart &operator<<(long double)
	{
		static_assert(detail::always_false<Ts...>::value, "Not implemented");
	}

	template <typename... Ts>
	Uart &operator<<(bool)
	{
		static_assert(detail::always_false<Ts...>::value, "Not implemented");
	}

	template <typename... Ts>
	Uart &operator<<(const void *)
	{
		static_assert(detail::always_false<Ts...>::value, "Not implemented");
	}

	//////////////////////////////////////////////////////////////////////////
	// Input stream overloads

	template <typename... Ts>
	Uart &operator>>(char &)
	{
		static_assert(detail::always_false<Ts...>::value, "Not implemented");
	}

	template <typename... Ts>
	Uart &operator>>(unsigned char &)
	{
		static_assert(detail::always_false<Ts...>::value, "Not implemented");
	}

	template <typename... Ts>
	Uart &operator>>(short &)
	{
		static_assert(detail::always_false<Ts...>::value, "Not implemented");
	}

	template <typename... Ts>
	Uart &operator>>(unsigned short &)
	{
		static_assert(detail::always_false<Ts...>::value, "Not implemented");
	}

	template <typename... Ts>
	Uart &operator>>(int &)
	{
		static_assert(detail::always_false<Ts...>::value, "Not implemented");
	}

	template <typename... Ts>
	Uart &operator>>(unsigned int &)
	{
		static_assert(detail::always_false<Ts...>::value, "Not implemented");
	}

	template <typename... Ts>
	Uart &operator>>(long &)
	{
		static_assert(detail::always_false<Ts...>::value, "Not implemented");
	}

	template <typename... Ts>
	Uart &operator>>(unsigned long &)
	{
		static_assert(detail::always_false<Ts...>::value, "Not implemented");
	}

	template <typename... Ts>
	Uart &operator>>(long long &)
	{
		static_assert(detail::always_false<Ts...>::value, "Not implemented");
	}

	template <typename... Ts>
	Uart &operator>>(unsigned long long &)
	{
		static_assert(detail::always_false<Ts...>::value, "Not implemented");
	}

	template <typename... Ts>
	Uart &operator>>(float &)
	{
		static_assert(detail::always_false<Ts...>::value, "Not implemented");
	}

	template <typename... Ts>
	Uart &operator>>(double &)
	{
		static_assert(detail::always_false<Ts...>::value, "Not implemented");
	}

	template <typename... Ts>
	Uart &operator>>(long double &)
	{
		static_assert(detail::always_false<Ts...>::value, "Not implemented");
	}

	template <typename... Ts>
	Uart &operator>>(bool &)
	{
		static_assert(detail::always_false<Ts...>::value, "Not implemented");
	}

	template <typename... Ts>
	Uart &operator>>(const void *&)
	{
		static_assert(detail::always_false<Ts...>::value, "Not implemented");
	}
};

template <typename cfg = Config<>>
using Uart0 = Uart<Hardware0<Mode::ASYNCHRONOUS, cfg>>;

#ifdef HAS_UART1
template <typename cfg = Config<>>
using Uart1 = Uart<Hardware1<Mode::ASYNCHRONOUS, cfg>>;
#endif

} // namespace uart

#undef FORCE_INLINE
#undef HAS_UART1