Implemented overloads for printing numbers

.gitignore

@@ -2,10 +2,4 @@
 Release
 Debug
 *.componentinfo.xml
-*.elf
-*.o
-*.hex
-*.srec
-*.eeprom
-*.lss
-*.map
+avrdude.bat

.gitmodules

@@ -1,12 +0,0 @@
-[submodule "uart/io"]
-	path = uart/io
-	url = git@git.blackmark.me:avr/io.git
-[submodule "uart/uart"]
-	path = uart/uart
-	url = git@git.blackmark.me:avr/uart.git
-[submodule "uart/flash"]
-	path = uart/flash
-	url = git@git.blackmark.me:avr/flash.git
-[submodule "uart/util"]
-	path = uart/util
-	url = git@git.blackmark.me:avr/util.git

LICENSE

@@ -1,21 +0,0 @@
-MIT License
-
-Copyright (c) 2019 BlackMark
-
-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 (including the next
-paragraph) 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.

config.hpp

@@ -0,0 +1,50 @@
+#pragma once
+
+#include <stdint.h>
+
+namespace uart {
+
+enum class DataBits {
+	FIVE,
+	SIX,
+	SEVEN,
+	EIGHT,
+	NINE,
+};
+
+enum class StopBits {
+	ONE,
+	TWO,
+};
+
+enum class Parity {
+	NONE,
+	ODD,
+	EVEN,
+};
+
+namespace detail {
+
+template <DataBits dataBits>
+struct choose_data_type {
+	using type = uint8_t;
+};
+
+template <>
+struct choose_data_type<DataBits::NINE> {
+	using type = uint16_t;
+};
+
+} // namespace detail
+
+template <uint32_t baudRate = 9600, DataBits dataBits = DataBits::EIGHT, Parity parity = Parity::NONE,
+          StopBits stopBits = StopBits::ONE>
+struct Config {
+	static constexpr auto BAUD_RATE = baudRate;
+	static constexpr auto DATA_BITS = dataBits;
+	static constexpr auto PARITY = parity;
+	static constexpr auto STOP_BITS = stopBits;
+	using data_t = typename detail::choose_data_type<DATA_BITS>::type;
+};
+
+} // namespace uart

hardware.hpp

@@ -0,0 +1,217 @@
+#pragma once
+
+#include "../clock.h"
+
+#include <stdint.h>
+
+#define FORCE_INLINE __attribute__((always_inline))
+
+namespace uart {
+
+enum class Mode {
+	ASYNCHRONOUS,
+	ASYNCHRONOUS_2X,
+	SYNCHRONOUS_MASTER,
+	SYNCHRONOUS_SLAVE,
+	SPI,
+};
+
+enum class Driven {
+	INTERRUPT,
+	BLOCKING,
+};
+
+namespace detail {
+
+template <class Registers, typename CtrlFlagsA, typename CtrlFlagsB, typename CtrlFlagsC, class cfg, Mode mode,
+          Driven driven>
+class Hardware {
+  public:
+	static void init() FORCE_INLINE
+	{
+		constexpr auto baudVal = calcBaud();
+
+		*Registers::BAUD_REG_H = static_cast<uint8_t>(baudVal >> 8);
+		*Registers::BAUD_REG_L = static_cast<uint8_t>(baudVal);
+
+		constexpr auto dataBitsVal = calcDataBits();
+		constexpr auto parityVal = calcParity();
+		constexpr auto stopBitsVal = calcStopBits();
+		constexpr auto modeVal = calcMode();
+		constexpr auto enableRx = calcRxState<true>();
+		constexpr auto enableTx = calcTxState<true>();
+		constexpr auto interruptVal = calcInterrupt();
+
+		constexpr uint8_t controlRegB = dataBitsVal.regBVal | enableRx | enableTx | interruptVal;
+		constexpr uint8_t controlRegC = dataBitsVal.regCVal | parityVal | stopBitsVal | modeVal;
+
+		*Registers::CTRL_STAT_REG_B = controlRegB;
+		*Registers::CTRL_STAT_REG_C = controlRegC;
+	}
+
+	static bool rxByteBlocking(typename cfg::data_t &byte) FORCE_INLINE
+	{
+		if (*Registers::CTRL_STAT_REG_A & (1 << CtrlFlagsA::RECEIVE_COMPLETE)) {
+			byte = *Registers::IO_REG;
+			return true;
+		}
+
+		return false;
+	}
+
+	static typename cfg::data_t rxByteInterrupt() FORCE_INLINE
+	{
+		return *Registers::IO_REG;
+	}
+
+	static void txByteBlocking(const typename cfg::data_t &byte) FORCE_INLINE
+	{
+		while (!(*Registers::CTRL_STAT_REG_A & (1 << CtrlFlagsA::DATA_REG_EMPTY)))
+			;
+
+		*Registers::IO_REG = byte;
+	}
+
+	static void txByteInterrupt(volatile const typename cfg::data_t &byte) FORCE_INLINE
+	{
+		*Registers::IO_REG = byte;
+	}
+
+	static bool peekBlocking() FORCE_INLINE
+	{
+		if (*Registers::CTRL_STAT_REG_A & (1 << CtrlFlagsA::RECEIVE_COMPLETE)) {
+			return true;
+		}
+
+		return false;
+	}
+
+	static void enableDataRegEmptyInt() FORCE_INLINE
+	{
+		*Registers::CTRL_STAT_REG_B |= (1 << CtrlFlagsB::DATA_REG_EMPTY_INT_ENABLE);
+	}
+
+	static void disableDataRegEmptyInt() FORCE_INLINE
+	{
+		*Registers::CTRL_STAT_REG_B &= ~(1 << CtrlFlagsB::DATA_REG_EMPTY_INT_ENABLE);
+	}
+
+  private:
+	struct DataBitsVal {
+		uint8_t regCVal = 0;
+		uint8_t regBVal = 0;
+	};
+
+	static constexpr auto calcBaud()
+	{
+		// The actual formula is (F_CPU / (16 * baudRate)) - 1, but this one has the advantage of rounding correctly
+		constexpr auto baudVal = (F_CPU + 8 * cfg::BAUD_RATE) / (16 * cfg::BAUD_RATE) - 1;
+		return baudVal;
+	}
+
+	static constexpr auto calcDataBits()
+	{
+		DataBitsVal dataBitsVal;
+
+		switch (cfg::DATA_BITS) {
+		case DataBits::FIVE:
+			dataBitsVal.regCVal = 0;
+			break;
+		case DataBits::SIX:
+			dataBitsVal.regCVal = (1 << CtrlFlagsC::CHAR_SIZE_0);
+			break;
+		case DataBits::SEVEN:
+			dataBitsVal.regCVal = (1 << CtrlFlagsC::CHAR_SIZE_1);
+			break;
+		case DataBits::EIGHT:
+			dataBitsVal.regCVal = (1 << CtrlFlagsC::CHAR_SIZE_1) | (1 << CtrlFlagsC::CHAR_SIZE_0);
+			break;
+		case DataBits::NINE:
+			dataBitsVal.regCVal = (1 << CtrlFlagsC::CHAR_SIZE_1) | (1 << CtrlFlagsC::CHAR_SIZE_0);
+			dataBitsVal.regBVal = (1 << CtrlFlagsB::CHAR_SIZE_2);
+			break;
+		}
+
+		return dataBitsVal;
+	}
+
+	static constexpr auto calcParity()
+	{
+		uint8_t parityVal = 0;
+
+		if (cfg::PARITY == Parity::EVEN)
+			parityVal = (1 << CtrlFlagsC::PARITY_MODE_1);
+		else if (cfg::PARITY == Parity::ODD)
+			parityVal = (1 << CtrlFlagsC::PARITY_MODE_1) | (1 << CtrlFlagsC::PARITY_MODE_0);
+
+		return parityVal;
+	}
+
+	static constexpr auto calcStopBits()
+	{
+		uint8_t stopBitsVal = 0;
+
+		if (cfg::STOP_BITS == StopBits::TWO)
+			stopBitsVal = (1 << CtrlFlagsC::STOP_BIT_SEL);
+
+		return stopBitsVal;
+	}
+
+	static constexpr auto calcMode()
+	{
+		static_assert(mode != Mode::SPI, "SPI mode can not be used with uart");
+
+		uint8_t modeVal = 0;
+
+		if (mode == Mode::SYNCHRONOUS_MASTER || mode == Mode::SYNCHRONOUS_SLAVE) {
+			modeVal = (1 << CtrlFlagsC::MODE_SEL_0);
+		}
+
+		return modeVal;
+	}
+
+	template <bool enable>
+	static constexpr auto calcRxState()
+	{
+		uint8_t enableVal = 0;
+
+		if (enable)
+			enableVal = (1 << CtrlFlagsB::RX_ENABLE);
+
+		return enableVal;
+	}
+
+	template <bool enable>
+	static constexpr auto calcTxState()
+	{
+		uint8_t enableVal = 0;
+
+		if (enable)
+			enableVal = (1 << CtrlFlagsB::TX_ENABLE);
+
+		return enableVal;
+	}
+
+	static constexpr auto calcInterrupt()
+	{
+		uint8_t interruptVal = 0;
+
+		if (driven == Driven::INTERRUPT)
+			interruptVal |= (1 << CtrlFlagsB::DATA_REG_EMPTY_INT_ENABLE) | (1 << CtrlFlagsB::RX_INT_ENABLE);
+
+		return interruptVal;
+	}
+};
+
+template <typename data_t, uint8_t Size>
+struct RingBuffer {
+	uint8_t head;
+	uint8_t tail;
+	data_t buf[Size];
+};
+
+} // namespace detail
+
+} // namespace uart
+
+#undef FORCE_INLINE

hardware0.cpp

@@ -0,0 +1,30 @@
+#include "hardware0.hpp"
+
+#include <avr/interrupt.h>
+
+namespace uart {
+namespace detail {
+
+#if defined(__AVR_ATmega1284P__)
+
+void (*fnRx0IntHandler)() = nullptr;
+void (*fnDataReg0EmptyIntHandler)() = nullptr;
+
+ISR(USART0_RX_vect)
+{
+	if (fnRx0IntHandler)
+		fnRx0IntHandler();
+}
+
+ISR(USART0_UDRE_vect)
+{
+	if (fnDataReg0EmptyIntHandler)
+		fnDataReg0EmptyIntHandler();
+}
+
+#else
+#error "This chip is not supported"
+#endif
+
+} // namespace detail
+} // namespace uart

hardware0.hpp

@@ -0,0 +1,210 @@
+#pragma once
+
+#include <stdint.h>
+
+#include <avr/io.h>
+
+#include "config.hpp"
+#include "hardware.hpp"
+
+#define FORCE_INLINE __attribute__((always_inline))
+
+namespace uart {
+
+namespace detail {
+
+#if defined(__AVR_ATmega1284P__)
+
+struct Registers0 {
+	static constexpr volatile auto *IO_REG = &UDR0;
+	static constexpr volatile auto *CTRL_STAT_REG_A = &UCSR0A;
+	static constexpr volatile auto *CTRL_STAT_REG_B = &UCSR0B;
+	static constexpr volatile auto *CTRL_STAT_REG_C = &UCSR0C;
+	static constexpr volatile auto *BAUD_REG_L = &UBRR0L;
+	static constexpr volatile auto *BAUD_REG_H = &UBRR0H;
+};
+
+enum class ControlFlagsA0 {
+	MULTI_PROC_COMM_MODE = MPCM0,
+	SPEED_2X = U2X0,
+	PARITY_ERROR = UPE0,
+	DATA_OVER_RUN = DOR0,
+	FRAME_ERROR = FE0,
+	DATA_REG_EMPTY = UDRE0,
+	TRANSMIT_COMPLETE = TXC0,
+	RECEIVE_COMPLETE = RXC0,
+};
+
+enum class ControlFlagsB0 {
+	TX_DATA_BIT_8 = TXB80,
+	RX_DATA_BIT_8 = RXB80,
+	CHAR_SIZE_2 = UCSZ02,
+	TX_ENABLE = TXEN0,
+	RX_ENABLE = RXEN0,
+	DATA_REG_EMPTY_INT_ENABLE = UDRIE0,
+	TX_INT_ENABLE = TXCIE0,
+	RX_INT_ENABLE = RXCIE0,
+};
+
+enum class ControlFlagsC0 {
+	CLK_POLARITY = UCPOL0,
+	CHAR_SIZE_0 = UCSZ00,
+	CHAR_SIZE_1 = UCSZ01,
+	STOP_BIT_SEL = USBS0,
+	PARITY_MODE_0 = UPM00,
+	PARITY_MODE_1 = UPM01,
+	MODE_SEL_0 = UMSEL00,
+	MODE_SEL_1 = UMSEL01,
+};
+
+// clang-format off
+constexpr int operator<<(const int &lhs, const ControlFlagsA0 &rhs) { return lhs << static_cast<int>(rhs); }
+constexpr int operator<<(const int &lhs, const ControlFlagsB0 &rhs) { return lhs << static_cast<int>(rhs); }
+constexpr int operator<<(const int &lhs, const ControlFlagsC0 &rhs) { return lhs << static_cast<int>(rhs); }
+// clang-format on
+
+extern void (*fnRx0IntHandler)();
+extern void (*fnDataReg0EmptyIntHandler)();
+
+#else
+#error "This chip is not supported"
+#endif
+
+} // namespace detail
+
+template <Mode mode = Mode::ASYNCHRONOUS, class cfg = Config<>, Driven driven = Driven::INTERRUPT>
+class Hardware0 {
+  public:
+	using data_t = typename cfg::data_t;
+	static constexpr auto DATA_BITS = cfg::DATA_BITS;
+
+	static void init() FORCE_INLINE
+	{
+		HardwareImpl::init();
+	}
+
+	static void txByte(data_t byte) FORCE_INLINE
+	{
+		HardwareImpl::txByteBlocking(byte);
+	}
+
+	static bool rxByte(data_t &byte) FORCE_INLINE
+	{
+		return HardwareImpl::rxByteBlocking(byte);
+	}
+
+	static bool peek(data_t &byte) FORCE_INLINE
+	{
+		static_cast<void>(byte);
+		static_assert(driven == Driven::BLOCKING, "Peek with data is not supported in blocking mode");
+		return false;
+	}
+
+	static bool peek() FORCE_INLINE
+	{
+		return HardwareImpl::peekBlocking();
+	}
+
+  private:
+	using HardwareImpl = detail::Hardware<detail::Registers0, detail::ControlFlagsA0, detail::ControlFlagsB0,
+	                                      detail::ControlFlagsC0, cfg, mode, driven>;
+};
+
+template <Mode mode, class cfg>
+class Hardware0<mode, cfg, Driven::INTERRUPT> {
+  public:
+	using data_t = typename cfg::data_t;
+	static constexpr auto DATA_BITS = cfg::DATA_BITS;
+
+	static void init() FORCE_INLINE
+	{
+		detail::fnRx0IntHandler = rxIntHandler;
+		detail::fnDataReg0EmptyIntHandler = dataRegEmptyIntHandler;
+
+		HardwareImpl::init();
+	}
+
+	static void txByte(const data_t &byte) FORCE_INLINE
+	{
+		uint8_t tmpHead = (sm_txBuf.head + 1) % TX_BUFFER_SIZE;
+		while (tmpHead == sm_txBuf.tail)
+			;
+
+		sm_txBuf.buf[tmpHead] = byte;
+		sm_txBuf.head = tmpHead;
+
+		HardwareImpl::enableDataRegEmptyInt();
+	}
+
+	static bool rxByte(data_t &byte) FORCE_INLINE
+	{
+		if (sm_rxBuf.head == sm_rxBuf.tail)
+			return false;
+
+		uint8_t tmpTail = (sm_rxBuf.tail + 1) % RX_BUFFER_SIZE;
+		byte = sm_rxBuf.buf[tmpTail];
+		sm_rxBuf.tail = tmpTail;
+
+		return true;
+	}
+
+	static bool peek(data_t &byte) FORCE_INLINE
+	{
+		if (sm_rxBuf.head == sm_rxBuf.tail)
+			return false;
+
+		uint8_t tmpTail = (sm_rxBuf.tail + 1) % RX_BUFFER_SIZE;
+		byte = sm_rxBuf.buf[tmpTail];
+
+		return true;
+	}
+
+	static bool peek() FORCE_INLINE
+	{
+		return (sm_rxBuf.head != sm_rxBuf.tail);
+	}
+
+  private:
+	using HardwareImpl = detail::Hardware<detail::Registers0, detail::ControlFlagsA0, detail::ControlFlagsB0,
+	                                      detail::ControlFlagsC0, cfg, mode, Driven::INTERRUPT>;
+
+	static constexpr auto TX_BUFFER_SIZE = 16;
+	static constexpr auto RX_BUFFER_SIZE = 16;
+
+	static volatile detail::RingBuffer<data_t, TX_BUFFER_SIZE> sm_txBuf;
+	static volatile detail::RingBuffer<data_t, RX_BUFFER_SIZE> sm_rxBuf;
+
+	static void rxIntHandler()
+	{
+		uint8_t tmpHead = (sm_rxBuf.head + 1) % RX_BUFFER_SIZE;
+
+		if (tmpHead != sm_rxBuf.tail) {
+			sm_rxBuf.head = tmpHead;
+			sm_rxBuf.buf[tmpHead] = HardwareImpl::rxByteInterrupt();
+		}
+	}
+
+	static void dataRegEmptyIntHandler() FORCE_INLINE
+	{
+		if (sm_txBuf.head != sm_txBuf.tail) {
+			uint8_t tmpTail = (sm_txBuf.tail + 1) % TX_BUFFER_SIZE;
+			sm_txBuf.tail = tmpTail;
+			HardwareImpl::txByteInterrupt(sm_txBuf.buf[tmpTail]);
+		} else
+			HardwareImpl::disableDataRegEmptyInt();
+	}
+};
+
+template <Mode mode, class cfg>
+volatile detail::RingBuffer<typename Hardware0<mode, cfg, Driven::INTERRUPT>::data_t,
+                            Hardware0<mode, cfg, Driven::INTERRUPT>::TX_BUFFER_SIZE>
+    Hardware0<mode, cfg, Driven::INTERRUPT>::sm_txBuf = {0, 0, {0}};
+
+template <Mode mode, class cfg>
+volatile detail::RingBuffer<typename Hardware0<mode, cfg, Driven::INTERRUPT>::data_t,
+                            Hardware0<mode, cfg, Driven::INTERRUPT>::RX_BUFFER_SIZE>
+    Hardware0<mode, cfg, Driven::INTERRUPT>::sm_rxBuf = {0, 0, {0}};
+
+} // namespace uart
+
+#undef FORCE_INLINE

hardware1.cpp

@@ -0,0 +1,30 @@
+#include "hardware1.hpp"
+
+#include <avr/interrupt.h>
+
+namespace uart {
+namespace detail {
+
+#if defined(__AVR_ATmega1284P__)
+
+void (*fnRx1IntHandler)() = nullptr;
+void (*fnDataReg1EmptyIntHandler)() = nullptr;
+
+ISR(USART1_RX_vect)
+{
+	if (fnRx1IntHandler)
+		fnRx1IntHandler();
+}
+
+ISR(USART1_UDRE_vect)
+{
+	if (fnDataReg1EmptyIntHandler)
+		fnDataReg1EmptyIntHandler();
+}
+
+#else
+#error "This chip is not supported"
+#endif
+
+} // namespace detail
+} // namespace uart

hardware1.hpp

@@ -0,0 +1,216 @@
+#pragma once
+
+#include <stdint.h>
+
+#include <avr/io.h>
+
+#include "config.hpp"
+#include "hardware.hpp"
+
+#define FORCE_INLINE __attribute__((always_inline))
+
+namespace uart {
+
+namespace detail {
+
+#if defined(__AVR_ATmega1284P__)
+
+struct Registers1 {
+	static constexpr volatile auto *IO_REG = &UDR1;
+	static constexpr volatile auto *CTRL_STAT_REG_A = &UCSR1A;
+	static constexpr volatile auto *CTRL_STAT_REG_B = &UCSR1B;
+	static constexpr volatile auto *CTRL_STAT_REG_C = &UCSR1C;
+	static constexpr volatile auto *BAUD_REG_L = &UBRR1L;
+	static constexpr volatile auto *BAUD_REG_H = &UBRR1H;
+};
+
+enum class ControlFlagsA1 {
+	MULTI_PROC_COMM_MODE = MPCM1,
+	SPEED_2X = U2X1,
+	PARITY_ERROR = UPE1,
+	DATA_OVER_RUN = DOR1,
+	FRAME_ERROR = FE1,
+	DATA_REG_EMPTY = UDRE1,
+	TRANSMIT_COMPLETE = TXC1,
+	RECEIVE_COMPLETE = RXC1,
+};
+
+enum class ControlFlagsB1 {
+	TX_DATA_BIT_8 = TXB81,
+	RX_DATA_BIT_8 = RXB81,
+	CHAR_SIZE_2 = UCSZ12,
+	TX_ENABLE = TXEN1,
+	RX_ENABLE = RXEN1,
+	DATA_REG_EMPTY_INT_ENABLE = UDRIE1,
+	TX_INT_ENABLE = TXCIE1,
+	RX_INT_ENABLE = RXCIE1,
+};
+
+enum class ControlFlagsC1 {
+	CLK_POLARITY = UCPOL1,
+	CHAR_SIZE_0 = UCSZ10,
+	CHAR_SIZE_1 = UCSZ11,
+	STOP_BIT_SEL = USBS1,
+	PARITY_MODE_0 = UPM10,
+	PARITY_MODE_1 = UPM11,
+	MODE_SEL_0 = UMSEL10,
+	MODE_SEL_1 = UMSEL11,
+};
+
+// clang-format off
+constexpr int operator<<(const int &lhs, const ControlFlagsA1 &rhs) { return lhs << static_cast<int>(rhs); }
+constexpr int operator<<(const int &lhs, const ControlFlagsB1 &rhs) { return lhs << static_cast<int>(rhs); }
+constexpr int operator<<(const int &lhs, const ControlFlagsC1 &rhs) { return lhs << static_cast<int>(rhs); }
+// clang-format on
+
+extern void (*fnRx1IntHandler)();
+extern void (*fnDataReg1EmptyIntHandler)();
+
+#define HAS_UART1
+
+#else
+#error "This chip is not supported"
+#endif
+
+} // namespace detail
+
+#ifdef HAS_UART1
+
+template <Mode mode = Mode::ASYNCHRONOUS, class cfg = Config<>, Driven driven = Driven::INTERRUPT>
+class Hardware1 {
+  public:
+	using data_t = typename cfg::data_t;
+	static constexpr auto DATA_BITS = cfg::DATA_BITS;
+
+	static void init() FORCE_INLINE
+	{
+		HardwareImpl::init();
+	}
+
+	static void txByte(const data_t &byte) FORCE_INLINE
+	{
+		HardwareImpl::txByteBlocking(byte);
+	}
+
+	static bool rxByte(data_t &byte) FORCE_INLINE
+	{
+		return HardwareImpl::rxByteBlocking(byte);
+	}
+
+	static bool peek(data_t &byte) FORCE_INLINE
+	{
+		static_cast<void>(byte);
+		static_assert(driven != Driven::BLOCKING, "Peek with data is not supported in blocking mode");
+		return false;
+	}
+
+	static bool peek() FORCE_INLINE
+	{
+		return HardwareImpl::peekBlocking();
+	}
+
+  private:
+	using HardwareImpl = detail::Hardware<detail::Registers1, detail::ControlFlagsA1, detail::ControlFlagsB1,
+	                                      detail::ControlFlagsC1, cfg, mode, driven>;
+};
+
+template <Mode mode, class cfg>
+class Hardware1<mode, cfg, Driven::INTERRUPT> {
+  public:
+	using data_t = typename cfg::data_t;
+	static constexpr auto DATA_BITS = cfg::DATA_BITS;
+
+	static void init() FORCE_INLINE
+	{
+		detail::fnRx1IntHandler = rxIntHandler;
+		detail::fnDataReg1EmptyIntHandler = dataRegEmptyIntHandler;
+
+		HardwareImpl::init();
+	}
+
+	static void txByte(const data_t &byte) FORCE_INLINE
+	{
+		uint8_t tmpHead = (sm_txBuf.head + 1) % TX_BUFFER_SIZE;
+		while (tmpHead == sm_txBuf.tail)
+			;
+
+		sm_txBuf.buf[tmpHead] = byte;
+		sm_txBuf.head = tmpHead;
+
+		HardwareImpl::enableDataRegEmptyInt();
+	}
+
+	static bool rxByte(data_t &byte) FORCE_INLINE
+	{
+		if (sm_rxBuf.head == sm_rxBuf.tail)
+			return false;
+
+		uint8_t tmpTail = (sm_rxBuf.tail + 1) % RX_BUFFER_SIZE;
+		byte = sm_rxBuf.buf[tmpTail];
+		sm_rxBuf.tail = tmpTail;
+
+		return true;
+	}
+
+	static bool peek(data_t &byte) FORCE_INLINE
+	{
+		if (sm_rxBuf.head == sm_rxBuf.tail)
+			return false;
+
+		uint8_t tmpTail = (sm_rxBuf.tail + 1) % RX_BUFFER_SIZE;
+		byte = sm_rxBuf.buf[tmpTail];
+
+		return true;
+	}
+
+	static bool peek() FORCE_INLINE
+	{
+		return (sm_rxBuf.head != sm_rxBuf.tail);
+	}
+
+  private:
+	using HardwareImpl = detail::Hardware<detail::Registers1, detail::ControlFlagsA1, detail::ControlFlagsB1,
+	                                      detail::ControlFlagsC1, cfg, mode, Driven::INTERRUPT>;
+
+	static constexpr auto TX_BUFFER_SIZE = 16;
+	static constexpr auto RX_BUFFER_SIZE = 16;
+
+	static volatile detail::RingBuffer<data_t, TX_BUFFER_SIZE> sm_txBuf;
+	static volatile detail::RingBuffer<data_t, RX_BUFFER_SIZE> sm_rxBuf;
+
+	static void rxIntHandler()
+	{
+		uint8_t tmpHead = (sm_rxBuf.head + 1) % RX_BUFFER_SIZE;
+
+		if (tmpHead != sm_rxBuf.tail) {
+			sm_rxBuf.head = tmpHead;
+			sm_rxBuf.buf[tmpHead] = HardwareImpl::rxByteInterrupt();
+		}
+	}
+
+	static void dataRegEmptyIntHandler() FORCE_INLINE
+	{
+		if (sm_txBuf.head != sm_txBuf.tail) {
+			uint8_t tmpTail = (sm_txBuf.tail + 1) % TX_BUFFER_SIZE;
+			sm_txBuf.tail = tmpTail;
+			HardwareImpl::txByteInterrupt(sm_txBuf.buf[tmpTail]);
+		} else
+			HardwareImpl::disableDataRegEmptyInt();
+	}
+};
+
+template <Mode mode, class cfg>
+volatile detail::RingBuffer<typename Hardware1<mode, cfg, Driven::INTERRUPT>::data_t,
+                            Hardware1<mode, cfg, Driven::INTERRUPT>::TX_BUFFER_SIZE>
+    Hardware1<mode, cfg, Driven::INTERRUPT>::sm_txBuf = {0, 0, {0}};
+
+template <Mode mode, class cfg>
+volatile detail::RingBuffer<typename Hardware1<mode, cfg, Driven::INTERRUPT>::data_t,
+                            Hardware1<mode, cfg, Driven::INTERRUPT>::RX_BUFFER_SIZE>
+    Hardware1<mode, cfg, Driven::INTERRUPT>::sm_rxBuf = {0, 0, {0}};
+
+#endif
+
+} // namespace uart
+
+#undef FORCE_INLINE

software.hpp

@@ -0,0 +1,21 @@
+#pragma once
+
+#include "config.hpp"
+#include "utils.hpp"
+
+#include "../io/io.hpp"
+
+namespace uart {
+
+template <io::P rxPin, io::P txPin, class cfg = Config<>>
+class Software {
+	static_assert(util::always_false_v<cfg>, "Not implemented");
+
+  public:
+	using data_t = typename cfg::data_t;
+	static constexpr auto DATA_BITS = cfg::DATA_BITS;
+
+	static void init() {}
+};
+
+} // namespace uart

uart.atsln

@@ -1,22 +0,0 @@
-
-Microsoft Visual Studio Solution File, Format Version 12.00
-# Atmel Studio Solution File, Format Version 11.00
-VisualStudioVersion = 14.0.23107.0
-MinimumVisualStudioVersion = 10.0.40219.1
-Project("{E66E83B9-2572-4076-B26E-6BE79FF3018A}") = "uart", "uart\uart.cppproj", "{DCE6C7E3-EE26-4D79-826B-08594B9AD897}"
-EndProject
-Global
-	GlobalSection(SolutionConfigurationPlatforms) = preSolution
-		Debug|AVR = Debug|AVR
-		Release|AVR = Release|AVR
-	EndGlobalSection
-	GlobalSection(ProjectConfigurationPlatforms) = postSolution
-		{DCE6C7E3-EE26-4D79-826B-08594B9AD897}.Debug|AVR.ActiveCfg = Debug|AVR
-		{DCE6C7E3-EE26-4D79-826B-08594B9AD897}.Debug|AVR.Build.0 = Debug|AVR
-		{DCE6C7E3-EE26-4D79-826B-08594B9AD897}.Release|AVR.ActiveCfg = Release|AVR
-		{DCE6C7E3-EE26-4D79-826B-08594B9AD897}.Release|AVR.Build.0 = Release|AVR
-	EndGlobalSection
-	GlobalSection(SolutionProperties) = preSolution
-		HideSolutionNode = FALSE
-	EndGlobalSection
-EndGlobal

uart.hpp

@@ -0,0 +1,351 @@
+#pragma once
+
+#include <stdint.h>
+
+#include "config.hpp"
+#include "hardware0.hpp"
+#include "hardware1.hpp"
+#include "software.hpp"
+#include "utils.hpp"
+
+#include "../flash/flash.hpp"
+
+#define FORCE_INLINE __attribute__((always_inline))
+
+namespace uart {
+
+namespace detail {
+
+template <typename T, T limit, size_t Base>
+static constexpr size_t cntDigits()
+{
+	T num = limit;
+	size_t cnt = 0;
+
+	if (num < 0) {
+		num = -num;
+		++cnt;
+	}
+
+	do {
+		num /= 10;
+		++cnt;
+	} while (num > 0);
+
+	return cnt;
+}
+
+template <typename T, size_t Base>
+static constexpr size_t maxNumDigits()
+{
+	T minDigits = cntDigits<T, util::NumericLimits<T>::min(), Base>();
+	T maxDigits = cntDigits<T, util::NumericLimits<T>::max(), Base>();
+
+	return (minDigits < maxDigits) ? maxDigits : minDigits;
+}
+
+} // namespace detail
+
+template <class Driver>
+class Uart {
+  public:
+	using data_t = typename Driver::data_t;
+
+	// Constructing a uart object does not initialize the driver to allow different specializations with the same
+	// back-end to exists at the same time
+	// Note that init must be called every time when switching specializations with the same back-end
+	Uart() = default;
+
+	// Moving and copying uart objects is not supported
+	Uart(const Uart &) = delete;
+	Uart(Uart &&) = delete;
+	Uart &operator=(const Uart &) = delete;
+	Uart &operator=(Uart &&) = delete;
+
+	// Before using the uart init must be called
+	static void init()
+	{
+		Driver::init();
+	}
+
+	static void txByte(const data_t &byte)
+	{
+		Driver::txByte(byte);
+	}
+
+	static bool rxByte(data_t &byte)
+	{
+		return Driver::rxByte(byte);
+	}
+
+	static bool peek(data_t &byte)
+	{
+		return Driver::peek(byte);
+	}
+
+	static bool 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);
+	}
+
+	template <typename T, size_t Base = 10>
+	static inline void txNumber(const T &val)
+	{
+		static_assert(util::is_integral_v<T>, "Only supported on integral types");
+
+		constexpr size_t numDigits = detail::maxNumDigits<T, Base>();
+		data_t buffer[numDigits];
+		data_t *bufEnd = buffer + numDigits - 1;
+
+		T digits = val;
+
+		if (digits < 0) {
+			digits = -digits;
+			txByte('-');
+		}
+
+		do {
+			data_t lastDigit = digits % Base;
+			*bufEnd-- = '0' + lastDigit;
+			digits /= Base;
+		} while (digits > 0);
+
+		for (data_t *buf = bufEnd + 1; buf < buffer + numDigits; ++buf)
+			txByte(*buf);
+	}
+
+	//////////////////////////////////////////////////////////////////////////
+	// Output stream overloads
+
+	Uart &operator<<(const char *str)
+	{
+		txString(str);
+		return *this;
+	}
+
+	Uart &operator<<(const ::detail::FlashString *str)
+	{
+		txString(str);
+		return *this;
+	}
+
+	Uart &operator<<(const char &val)
+	{
+		txByte(val);
+		return *this;
+	}
+
+	Uart &operator<<(const signed char &val)
+	{
+		txNumber(val);
+		return *this;
+	}
+
+	Uart &operator<<(const unsigned char &val)
+	{
+		txNumber(val);
+		return *this;
+	}
+
+	Uart &operator<<(const short &val)
+	{
+		txNumber(val);
+		return *this;
+	}
+
+	Uart &operator<<(unsigned short &val)
+	{
+		txNumber(val);
+		return *this;
+	}
+
+	Uart &operator<<(const int &val)
+	{
+		txNumber(val);
+		return *this;
+	}
+
+	Uart &operator<<(const unsigned int &val)
+	{
+		txNumber(val);
+		return *this;
+	}
+
+	Uart &operator<<(const long &val)
+	{
+		txNumber(val);
+		return *this;
+	}
+
+	Uart &operator<<(unsigned long &val)
+	{
+		txNumber(val);
+		return *this;
+	}
+
+	Uart &operator<<(long long &val)
+	{
+		txNumber(val);
+		return *this;
+	}
+
+	Uart &operator<<(unsigned long long &val)
+	{
+		txNumber(val);
+		return *this;
+	}
+
+	template <typename... Ts>
+	Uart &operator<<(float) const
+	{
+		static_assert(util::always_false_v<Ts...>, "Not implemented");
+	}
+
+	template <typename... Ts>
+	Uart &operator<<(double) const
+	{
+		static_assert(util::always_false_v<Ts...>, "Not implemented");
+	}
+
+	template <typename... Ts>
+	Uart &operator<<(long double) const
+	{
+		static_assert(util::always_false_v<Ts...>, "Not implemented");
+	}
+
+	Uart &operator<<(const bool &val)
+	{
+		txString(val ? F("true") : F("false"));
+		return *this;
+	}
+
+	Uart &operator<<(const void *val)
+	{
+		txNumber(reinterpret_cast<uint16_t>(val));
+		return *this;
+	}
+
+	//////////////////////////////////////////////////////////////////////////
+	// Input stream overloads
+
+	template <typename... Ts>
+	Uart &operator>>(char &) const
+	{
+		static_assert(util::always_false_v<Ts...>, "Not implemented");
+	}
+
+	template <typename... Ts>
+	Uart &operator>>(unsigned char &) const
+	{
+		static_assert(util::always_false_v<Ts...>, "Not implemented");
+	}
+
+	template <typename... Ts>
+	Uart &operator>>(short &) const
+	{
+		static_assert(util::always_false_v<Ts...>, "Not implemented");
+	}
+
+	template <typename... Ts>
+	Uart &operator>>(unsigned short &) const
+	{
+		static_assert(util::always_false_v<Ts...>, "Not implemented");
+	}
+
+	template <typename... Ts>
+	Uart &operator>>(int &) const
+	{
+		static_assert(util::always_false_v<Ts...>, "Not implemented");
+	}
+
+	template <typename... Ts>
+	Uart &operator>>(unsigned int &) const
+	{
+		static_assert(util::always_false_v<Ts...>, "Not implemented");
+	}
+
+	template <typename... Ts>
+	Uart &operator>>(long &) const
+	{
+		static_assert(util::always_false_v<Ts...>, "Not implemented");
+	}
+
+	template <typename... Ts>
+	Uart &operator>>(unsigned long &) const
+	{
+		static_assert(util::always_false_v<Ts...>, "Not implemented");
+	}
+
+	template <typename... Ts>
+	Uart &operator>>(long long &) const
+	{
+		static_assert(util::always_false_v<Ts...>, "Not implemented");
+	}
+
+	template <typename... Ts>
+	Uart &operator>>(unsigned long long &) const
+	{
+		static_assert(util::always_false_v<Ts...>, "Not implemented");
+	}
+
+	template <typename... Ts>
+	Uart &operator>>(float &) const
+	{
+		static_assert(util::always_false_v<Ts...>, "Not implemented");
+	}
+
+	template <typename... Ts>
+	Uart &operator>>(double &) const
+	{
+		static_assert(util::always_false_v<Ts...>, "Not implemented");
+	}
+
+	template <typename... Ts>
+	Uart &operator>>(long double &) const
+	{
+		static_assert(util::always_false_v<Ts...>, "Not implemented");
+	}
+
+	template <typename... Ts>
+	Uart &operator>>(bool &) const
+	{
+		static_assert(util::always_false_v<Ts...>, "Not implemented");
+	}
+
+	template <typename... Ts>
+	Uart &operator>>(const void *&) const
+	{
+		static_assert(util::always_false_v<Ts...>, "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

uart/clock.hpp

@@ -1,4 +0,0 @@
-#pragma once
-
-#define F_CPU 16'000'000
-#include <util/delay.h>

uart/main.cpp

@@ -1,283 +0,0 @@
-#include "clock.hpp"
-
-#include <avr/interrupt.h>
-
-#include <stdint.h>
-
-#include "flash/flash.hpp"
-#include "io/io.hpp"
-#include "uart/uart.hpp"
-
-using uart0_interface_t =
-    uart::Uart<uart::Hardware0<uart::Config<115200>, uart::Driven::INTERRUPT, uart::Mode::ASYNCHRONOUS>>;
-
-using uart1_interface_t = uart::Uart1<>;
-
-REGISTER_UART0_INT_VECTORS(uart0_interface_t);
-REGISTER_UART1_INT_VECTORS(uart1_interface_t);
-
-void doubleSpeedTest()
-{
-	uart0_interface_t serial;
-	serial.init();
-
-	uint8_t counter = 100;
-	uint8_t data;
-
-	while (counter) {
-		if (serial.rxByte(data)) {
-			serial.txByte(data);
-			--counter;
-		}
-	}
-
-	serial << F("\r\n");
-
-	serial.flushTx();
-}
-
-void newUartUsage()
-{
-	using namespace uart;
-	Uart<Hardware0<Config<115200>, Driven::BLOCKING, Mode::ASYNCHRONOUS>> serial;
-	serial.init();
-
-	serial << "New uart hi from RAM. " << F("New uart hi from flash\r\n");
-
-	while (false) {
-		uint8_t received = 0;
-
-		while (!serial.peek())
-			;
-
-		{
-			serial << F("Peeked: ");
-			serial.txByte(received);
-			serial << F("\r\n");
-		}
-
-		if (serial.rxByte(received)) {
-			serial << F("Received: ");
-			serial.txByte(received);
-			serial << F("\r\n");
-		}
-	}
-
-	serial.flushTx();
-}
-
-void newUartUsage2()
-{
-	uart1_interface_t serial1;
-
-	auto ramString = "Hello World from RAM. ";
-	auto flashString = F("Hello World from flash\r\n");
-
-	serial1.init();
-
-	serial1 << ramString;
-	serial1 << flashString;
-
-	serial1.flushTx();
-}
-
-void newUartStreamOverloads()
-{
-	using namespace uart;
-	Uart<Hardware0<Config<115200>, Driven::BLOCKING, Mode::ASYNCHRONOUS>> serial;
-	serial.init();
-
-	bool bVal = true;
-	char chVal = 'c';
-	signed char schVal = 's';
-	unsigned char uchVal = 'u';
-	short shVal = -12345;
-	unsigned short ushVal = 64123;
-	int iVal = -14321;
-	unsigned int uiVal = 32146;
-	long lVal = -571474496;
-	unsigned long ulVal = 2718958144;
-	long long llVal = -45197516864960;
-	unsigned long long ullVal = 4611685969606738496;
-
-	serial << F("Stream overload test:") << F("\r\n");
-
-	serial << F("bool               : ") << bVal << F("\r\n");
-	serial << F("char               : ") << chVal << F("\r\n");
-	serial << F("signed char        : ") << schVal << F("\r\n");
-	serial << F("unsigned char      : ") << uchVal << F("\r\n");
-	serial << F("short              : ") << shVal << F("\r\n");
-	serial << F("unsigned short     : ") << ushVal << F("\r\n");
-	serial << F("int                : ") << iVal << F("\r\n");
-	serial << F("unsigned int       : ") << uiVal << F("\r\n");
-	serial << F("long               : ") << lVal << F("\r\n");
-	serial << F("unsigned long      : ") << ulVal << F("\r\n");
-	serial << F("long long          : ") << llVal << F("\r\n");
-	serial << F("unsigned long long : ") << ullVal << F("\r\n");
-	serial << F("const void         : ") << &bVal << F("\r\n");
-
-	auto number = 0xBADF00D;
-
-	serial << F("Binary             : 0b");
-	serial.txNumber<decltype(number), 2>(number);
-	serial << F("\r\n");
-
-	serial << F("Octal              : 0");
-	serial.txNumber<decltype(number), 8>(number);
-	serial << F("\r\n");
-
-	serial << F("Decimal            : ");
-	serial.txNumber<decltype(number), 10>(number);
-	serial << F("\r\n");
-
-	serial << F("Hex                : 0x");
-	serial.txNumber<decltype(number), 16>(number);
-	serial << F("\r\n");
-
-	serial.flushTx();
-}
-
-namespace spi {
-
-enum class Cpol {
-	MODE_0,
-	MODE_1,
-};
-
-enum class Cpha {
-	MODE_0,
-	MODE_1,
-};
-
-enum class DataOrder {
-	MSB,
-	LSB,
-};
-
-template <Cpol cpol, Cpha cpha, DataOrder dataOrder>
-struct Config {
-	static constexpr auto CPOL_MODE = cpol;
-	static constexpr auto CPHA_MODE = cpha;
-	static constexpr auto DATA_ORDER = dataOrder;
-};
-
-template <class Driver>
-struct spi {
-	spi()
-	{
-		Driver::init();
-	}
-};
-
-} // namespace spi
-
-namespace uart {
-
-template <class Config>
-class Hardware0<Config, Driven::INTERRUPT, Mode::SPI> {
-  public:
-	static void init()
-	{
-		UCSR0C |= (1 << UMSEL01) | (1 << UMSEL00);
-
-		if (DATA_ORDER == spi::DataOrder::MSB)
-			UCSR0C &= ~(1 << UCSZ01);
-		else
-			UCSR0C |= (1 << UCSZ01);
-
-		if (CPOL_MODE == spi::Cpol::MODE_0)
-			UCSR0C &= ~(1 << UCPOL0);
-		else
-			UCSR0C |= (1 << UCPOL0);
-
-		if (CPHA_MODE == spi::Cpha::MODE_0)
-			UCSR0C &= ~(1 << UCSZ00);
-		else
-			UCSR0C |= (1 << UCSZ00);
-	}
-
-  private:
-	static constexpr auto CPOL_MODE = Config::CPOL_MODE;
-	static constexpr auto CPHA_MODE = Config::CPHA_MODE;
-	static constexpr auto DATA_ORDER = Config::DATA_ORDER;
-};
-
-} // namespace uart
-
-void spiTest()
-{
-	using config = spi::Config<spi::Cpol::MODE_0, spi::Cpha::MODE_0, spi::DataOrder::MSB>;
-	using uartspi = uart::Hardware0<config, uart::Driven::INTERRUPT, uart::Mode::SPI>;
-
-	spi::spi<uartspi> uartSpi;
-}
-
-static inline void initUart(const uint32_t baudRate)
-{
-	UBRR0 = static_cast<uint16_t>((F_CPU + 8 * baudRate) / (16 * baudRate) - 1);
-	UCSR0A = 0;
-	UCSR0C = (1 << UCSZ01) | (1 << UCSZ00);
-	UCSR0B = (1 << RXEN0) | (1 << TXEN0);
-}
-
-static inline void txUart(uint8_t byte)
-{
-	while (!(UCSR0A & (1 << UDRE0)))
-		;
-
-	UDR0 = byte;
-}
-
-static inline void txString(const char *str)
-{
-	while (char ch = *str++)
-		txUart(ch);
-}
-
-static inline void txString(const detail::FlashString *str)
-{
-	const char *strIt = reinterpret_cast<const char *>(str);
-
-	while (char ch = pgm_read_byte(strIt++))
-		txUart(ch);
-}
-
-static inline void flushTx()
-{
-	while (!(UCSR0A & (1 << UDRE0)))
-		;
-	while (!(UCSR0A & (1 << TXC0)))
-		;
-	UCSR0A |= (1 << TXC0);
-}
-
-void optimalUartTest()
-{
-	auto ramString = "Hello World from RAM. ";
-	auto flashString = F("Hello World from flash\r\n");
-
-	initUart(115200);
-
-	txString(ramString);
-	txString(flashString);
-
-	flushTx();
-}
-
-int main()
-{
-	sei();
-
-	doubleSpeedTest();
-
-	newUartUsage2();
-	optimalUartTest();
-	newUartStreamOverloads();
-
-	txString(F("\r\n"));
-	flushTx();
-
-	spiTest();
-
-	return 0;
-}

uart/uart.cppproj

@@ -1,254 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<Project DefaultTargets="Build" xmlns="http://schemas.microsoft.com/developer/msbuild/2003" ToolsVersion="14.0">
-  <PropertyGroup>
-    <SchemaVersion>2.0</SchemaVersion>
-    <ProjectVersion>7.0</ProjectVersion>
-    <ToolchainName>com.Atmel.AVRGCC8.CPP</ToolchainName>
-    <ProjectGuid>dce6c7e3-ee26-4d79-826b-08594b9ad897</ProjectGuid>
-    <avrdevice>ATmega1284P</avrdevice>
-    <avrdeviceseries>none</avrdeviceseries>
-    <OutputType>Executable</OutputType>
-    <Language>CPP</Language>
-    <OutputFileName>$(MSBuildProjectName)</OutputFileName>
-    <OutputFileExtension>.elf</OutputFileExtension>
-    <OutputDirectory>$(MSBuildProjectDirectory)\$(Configuration)</OutputDirectory>
-    <AssemblyName>uart</AssemblyName>
-    <Name>uart</Name>
-    <RootNamespace>uart</RootNamespace>
-    <ToolchainFlavour>avr-g++-9.1.0</ToolchainFlavour>
-    <KeepTimersRunning>true</KeepTimersRunning>
-    <OverrideVtor>false</OverrideVtor>
-    <CacheFlash>true</CacheFlash>
-    <ProgFlashFromRam>true</ProgFlashFromRam>
-    <RamSnippetAddress>0x20000000</RamSnippetAddress>
-    <UncachedRange />
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utils.hpp

@@ -0,0 +1,142 @@
+#pragma once
+
+// Fix for limits.h not exposing LLONG_MIN, LLONG_MIN, and ULLONG_MAX to C++ context
+#ifdef __cplusplus
+#define __STDC_VERSION__ 201112L
+#endif
+
+#include <limits.h>
+
+namespace uart {
+namespace util {
+
+// clang-format off
+template <bool Val> struct set_bool { static constexpr auto value = Val; };
+
+struct true_type : set_bool<true> {};
+struct false_type : set_bool<false> {};
+
+template <typename...> struct always_false : false_type {};
+
+template <typename... Ts> static constexpr auto always_false_v = always_false<Ts...>::value;
+
+template <typename T> struct is_integral : false_type {};
+template <> struct is_integral<bool> : true_type {};
+template <> struct is_integral<char> : true_type {};
+template <> struct is_integral<signed char> : true_type {};
+template <> struct is_integral<unsigned char> : true_type {};
+template <> struct is_integral<short> : true_type {};
+template <> struct is_integral<int> : true_type {};
+template <> struct is_integral<long int> : true_type {};
+template <> struct is_integral<long long int> : true_type {};
+template <> struct is_integral<unsigned short> : true_type {};
+template <> struct is_integral<unsigned int> : true_type {};
+template <> struct is_integral<unsigned long int> : true_type {};
+template <> struct is_integral<unsigned long long int> : true_type {};
+
+template <typename T> static constexpr auto is_integral_v = is_integral<T>::value;
+
+template <typename T, typename U> struct is_same : false_type {};
+template <typename T> struct is_same<T, T> : true_type {};
+
+template <typename T, typename U> static constexpr auto is_same_v = is_same<T, U>::value;
+
+template <typename T>
+struct NumericLimits {
+	static constexpr T min() { return T(); }
+	static constexpr T max() { return T(); }
+};
+
+template <>
+struct NumericLimits<bool> {
+	static constexpr bool min() { return false; }
+	static constexpr bool max() { return true; }
+};
+
+template <>
+struct NumericLimits<char> {
+	static constexpr char min() { return CHAR_MIN; }
+	static constexpr char max() { return CHAR_MAX; }
+};
+
+template <>
+struct NumericLimits<signed char> {
+	static constexpr signed char min() { return SCHAR_MIN; }
+	static constexpr signed char max() { return SCHAR_MAX; }
+};
+
+template <>
+struct NumericLimits<unsigned char> {
+	static constexpr unsigned char min() { return 0; }
+	static constexpr unsigned char max() { return UCHAR_MAX; }
+};
+
+template <>
+struct NumericLimits<short> {
+	static constexpr short min() { return SHRT_MIN; }
+	static constexpr short max() { return SHRT_MAX; }
+};
+
+template <>
+struct NumericLimits<int> {
+	static constexpr int min() { return INT_MIN; }
+	static constexpr int max() { return INT_MAX; }
+};
+
+template <>
+struct NumericLimits<long> {
+	static constexpr long int min() { return LONG_MIN; }
+	static constexpr long int max() { return LONG_MAX; }
+};
+
+template <>
+struct NumericLimits<long long int> {
+	static constexpr long long int min() { return LLONG_MIN; }
+	static constexpr long long int max() { return LLONG_MAX; }
+};
+
+template <>
+struct NumericLimits<unsigned short> {
+	static constexpr unsigned short min() { return 0; }
+	static constexpr unsigned short max() { return USHRT_MAX; }
+};
+
+template <>
+struct NumericLimits<unsigned int> {
+	static constexpr unsigned int min() { return 0; }
+	static constexpr unsigned int max() { return UINT_MAX; }
+};
+
+template <>
+struct NumericLimits<unsigned long int> {
+	static constexpr unsigned long int min() { return 0; }
+	static constexpr unsigned long int max() { return ULONG_MAX; }
+};
+
+template <>
+struct NumericLimits<unsigned long long int> {
+	static constexpr unsigned long long int min() { return 0; }
+	static constexpr unsigned long long int max() { return ULLONG_MAX; }
+};
+
+template <>
+struct NumericLimits<float> {
+	template <typename... Ts> static constexpr float min() { static_assert(always_false_v<Ts...>, "Not implemented"); return 0; }
+	template <typename... Ts> static constexpr float max() { static_assert(always_false_v<Ts...>, "Not implemented"); return 0; }
+};
+
+template <>
+struct NumericLimits<double> {
+	template <typename... Ts> static constexpr double min() { static_assert(always_false_v<Ts...>, "Not implemented"); return 0; }
+	template <typename... Ts> static constexpr double max() { static_assert(always_false_v<Ts...>, "Not implemented"); return 0; }
+};
+
+template <>
+struct NumericLimits<long double> {
+	template <typename... Ts> static constexpr long double min() { static_assert(always_false_v<Ts...>, "Not implemented"); return 0; }
+	template <typename... Ts> static constexpr long double max() { static_assert(always_false_v<Ts...>, "Not implemented"); return 0; }
+};
+// clang-format on
+
+} // namespace util
+} // namespace uart