Make use of C++ standard library

.gitmodules

@@ -1,6 +0,0 @@
-[submodule "spi/spi"]
-	path = spi/spi
-	url = git@git.blackmark.me:avr/spi.git
-[submodule "spi/io"]
-	path = spi/io
-	url = git@git.blackmark.me:avr/io.git

config.hpp

@@ -0,0 +1,63 @@
+#pragma once
+
+#include <cstdint>
+
+#include "../io/io.hpp"
+
+namespace spi {
+
+enum class ClockDiv {
+	DIV_4 = 0,
+	DIV_16 = 1,
+	DIV_64 = 2,
+	DIV_128 = 3,
+
+	DIV_2X_2 = 4,
+	DIV_2X_8 = 5,
+	DIV_2X_32 = 6,
+	DIV_2X_64 = 7,
+};
+
+enum class Mode {
+	MODE_0 = 0,
+	MODE_1 = 1,
+	MODE_2 = 2,
+	MODE_3 = 3,
+};
+
+enum class Side {
+	MASTER,
+	SLAVE,
+};
+
+enum class BitOrder {
+	LSB_FIRST,
+	MSB_FIRST,
+};
+
+template <ClockDiv freq = ClockDiv::DIV_128, Mode mode = Mode::MODE_0, Side side = Side::MASTER,
+          BitOrder bitOrder = BitOrder::MSB_FIRST, io::P ssPin = io::P::B2, bool pullup = false>
+struct HardwareConfig {
+	static constexpr auto FREQ = freq;
+	static constexpr auto MODE = mode;
+	static constexpr auto SIDE = side;
+	static constexpr auto BIT_ORDER = bitOrder;
+	static constexpr auto SS_PIN = ssPin;
+	static constexpr auto PULLUP = pullup;
+};
+
+template <io::P sckPin, io::P misoPin, io::P mosiPin, io::P ssPin, std::uint32_t freq = 100'000,
+          Mode mode = Mode::MODE_0, BitOrder bitOrder = BitOrder::MSB_FIRST, std::uint8_t bits = 8, bool pullup = false>
+struct SoftwareConfig {
+	static constexpr auto SCK_PIN = sckPin;
+	static constexpr auto MISO_PIN = misoPin;
+	static constexpr auto MOSI_PIN = mosiPin;
+	static constexpr auto SS_PIN = ssPin;
+	static constexpr auto FREQ = freq;
+	static constexpr auto MODE = mode;
+	static constexpr auto BIT_ORDER = bitOrder;
+	static constexpr auto BITS = bits;
+	static constexpr auto PULLUP = pullup;
+};
+
+} // namespace spi

hardware.hpp

@@ -0,0 +1,139 @@
+#pragma once
+
+#include <cstdint>
+
+#include "../io/io.hpp"
+
+namespace spi {
+
+#if defined(__AVR_ATmega328P__)
+
+template <class Cfg>
+class Hardware {
+  public:
+	using word_t = std::uint8_t;
+
+	static void init()
+	{
+		if constexpr (Cfg::SIDE == Side::MASTER) {
+			sm_ss = true;
+
+			sm_sck.dir(io::Dir::OUT);
+			sm_miso.dir(io::Dir::IN);
+			sm_miso.pullup(Cfg::PULLUP);
+			sm_mosi.dir(io::Dir::OUT);
+			sm_ss.dir(io::Dir::OUT);
+		} else {
+			sm_sck.dir(io::Dir::IN);
+			sm_miso.dir(io::Dir::OUT);
+			sm_mosi.dir(io::Dir::IN);
+			sm_ss.dir(io::Dir::IN);
+			sm_ss.pullup(true);
+		}
+
+		setClockDiv();
+		setMode();
+		setMaster();
+		setBitOrder();
+
+		SPCR = SPCR | (1 << SPE);
+	}
+
+	static word_t transfer(word_t data)
+	{
+		SPDR = data;
+		while (!(SPSR & (1 << SPIF)))
+			;
+		return SPDR;
+	}
+
+	static void select(bool selectState)
+	{
+		sm_ss = !selectState;
+	}
+
+  private:
+	static io::Pin<io::P::B5> sm_sck;
+	static io::Pin<io::P::B4> sm_miso;
+	static io::Pin<io::P::B3> sm_mosi;
+	static io::Pin<Cfg::SS_PIN> sm_ss;
+
+	static void setClockDiv()
+	{
+		std::uint8_t ui8ClockDiv = static_cast<std::uint8_t>(Cfg::FREQ);
+
+		if (ui8ClockDiv & 1) {
+			SPCR = SPCR | (1 << SPR0);
+		} else {
+			SPCR = SPCR & ~(1 << SPR0);
+		}
+
+		if (ui8ClockDiv & (1 << 1)) {
+			SPCR = SPCR | (1 << SPR1);
+		} else {
+			SPCR = SPCR & ~(1 << SPR1);
+		}
+
+		if (ui8ClockDiv & (1 << 2)) {
+			SPSR = SPSR | (1 << SPI2X);
+		} else {
+			SPSR = SPSR & ~(1 << SPI2X);
+		}
+	}
+
+	static void setMode()
+	{
+		if (Cfg::MODE == Mode::MODE_0 || Cfg::MODE == Mode::MODE_1) {
+			setCPOL(false);
+		} else {
+			setCPOL(true);
+		}
+
+		if (Cfg::MODE == Mode::MODE_0 || Cfg::MODE == Mode::MODE_2) {
+			setCPHA(false);
+		} else {
+			setCPHA(true);
+		}
+	}
+
+	static void setMaster()
+	{
+		if constexpr (Cfg::SIDE == Side::MASTER) {
+			SPCR = SPCR | (1 << MSTR);
+		} else {
+			SPCR = SPCR & ~(1 << MSTR);
+		}
+	}
+
+	static void setBitOrder()
+	{
+		if constexpr (Cfg::BIT_ORDER == BitOrder::LSB_FIRST) {
+			SPCR = SPCR | (1 << DORD);
+		} else {
+			SPCR = SPCR & ~(1 << DORD);
+		}
+	}
+
+	static void setCPOL(bool bCPOL)
+	{
+		if (bCPOL) {
+			SPCR = SPCR | (1 << CPOL);
+		} else {
+			SPCR = SPCR & ~(1 << CPOL);
+		}
+	}
+	static void setCPHA(bool bCPHA)
+	{
+		if (bCPHA) {
+			SPCR = SPCR | (1 << CPHA);
+		} else {
+			SPCR = SPCR & ~(1 << CPHA);
+		}
+	}
+};
+
+#else
+#error "This chip is not supported"
+#endif
+
+} // namespace spi

software.hpp

@@ -0,0 +1,114 @@
+#pragma once
+
+#include "../clock.hpp"
+
+#include <type_traits>
+#include <utility>
+
+#include <cstdint>
+
+#include <avr/interrupt.h>
+
+#include "../io/io.hpp"
+#include "../util/util.hpp"
+
+namespace spi {
+
+template <typename Cfg>
+class Software {
+	static constexpr double calcClockDelay()
+	{
+		constexpr auto staticClockCycles = 10;
+		constexpr auto maxFrequency = F_CPU / staticClockCycles;
+		static_assert(Cfg::FREQ <= maxFrequency, "SPI frequency not achievable using selected clock speed");
+		constexpr auto staticDelay = (1.0 * 1000 * 1000 / maxFrequency);
+		const auto delayUs = ((1.0 * 1000 * 1000 / Cfg::FREQ) - staticDelay) / 2;
+		return (delayUs > 0 ? delayUs : 0);
+	}
+
+  public:
+	static_assert(Cfg::BITS >= 1 && Cfg::BITS <= 64, "Word size must be in range [1-64]");
+	// clang-format off
+	using word_t = std::conditional_t<Cfg::BITS <=  8, std::uint8_t,
+	               std::conditional_t<Cfg::BITS <= 16, std::uint16_t,
+	               std::conditional_t<Cfg::BITS <= 32, std::uint32_t,
+	                                                   std::uint64_t>>>;
+	// clang-format on
+
+	static void init()
+	{
+		sm_sck = ((Cfg::MODE == Mode::MODE_0 || Cfg::MODE == Mode::MODE_1) ? false : true);
+		sm_ss = true;
+
+		sm_sck.dir(io::Dir::OUT);
+		sm_miso.dir(io::Dir::IN);
+		sm_miso.pullup(Cfg::PULLUP);
+		sm_mosi.dir(io::Dir::OUT);
+		sm_ss.dir(io::Dir::OUT);
+	}
+
+	static word_t transfer(const word_t data)
+	{
+		const auto oldInterruptState = disableInterrupts();
+
+		auto dataIn = word_t{};
+
+		util::for_constexpr(
+		    [&](const auto idx) {
+			    constexpr auto i = idx.value;
+			    constexpr auto bitPos = (Cfg::BIT_ORDER == BitOrder::MSB_FIRST ? Cfg::BITS - i - 1 : i);
+
+			    if constexpr (Cfg::MODE == Mode::MODE_0 || Cfg::MODE == Mode::MODE_2) {
+				    sm_mosi = data >> bitPos & 1;
+				    _delay_us(DELAY_US);
+				    sm_sck.toggle();
+
+				    const auto receivedBit = sm_miso.read();
+				    dataIn |= word_t{receivedBit} << bitPos;
+				    _delay_us(DELAY_US);
+				    sm_sck.toggle();
+			    } else {
+				    sm_sck.toggle();
+				    sm_mosi = data >> bitPos & 1;
+				    _delay_us(DELAY_US);
+
+				    sm_sck.toggle();
+				    const auto receivedBit = sm_miso.read();
+				    dataIn |= word_t{receivedBit} << bitPos;
+				    _delay_us(DELAY_US);
+			    }
+		    },
+		    std::make_index_sequence<Cfg::BITS>{});
+
+		enableInterrupts(oldInterruptState);
+
+		return dataIn;
+	}
+
+	static void select(const bool selectState)
+	{
+		sm_ss = !selectState;
+	}
+
+  private:
+	static io::Pin<Cfg::SCK_PIN> sm_sck;
+	static io::Pin<Cfg::MISO_PIN> sm_miso;
+	static io::Pin<Cfg::MOSI_PIN> sm_mosi;
+	static io::Pin<Cfg::SS_PIN> sm_ss;
+
+	static constexpr auto DELAY_US = calcClockDelay();
+
+	static inline std::uint8_t disableInterrupts()
+	{
+		const auto oldInterruptState = SREG;
+		cli();
+		return oldInterruptState;
+	}
+
+	static inline void enableInterrupts(const std::uint8_t oldInterruptState)
+	{
+		SREG = oldInterruptState;
+	}
+};
+
+} // namespace spi

spi.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}") = "spi", "spi\spi.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

spi.hpp

@@ -0,0 +1,31 @@
+#pragma once
+
+#include "config.hpp"
+#include "hardware.hpp"
+#include "software.hpp"
+
+#include "../io/io.hpp"
+
+namespace spi {
+
+template <class Driver>
+struct Spi {
+	using word_t = typename Driver::word_t;
+
+	static inline void init()
+	{
+		Driver::init();
+	}
+
+	static inline word_t transfer(const word_t data)
+	{
+		return Driver::transfer(data);
+	}
+
+	static inline void select(const bool selectState)
+	{
+		Driver::select(selectState);
+	}
+};
+
+} // namespace spi

spi/clock.hpp

@@ -1,4 +0,0 @@
-#pragma once
-
-#define F_CPU 16000000
-#include <util/delay.h>

spi/io

@@ -1 +0,0 @@
-Subproject commit 80de36ee7ee3e6b0842d5eaee81d54062cb496b2

spi/main.cpp

@@ -1,23 +0,0 @@
-#include "clock.hpp"
-
-#include "spi/spi.hpp"
-
-void spiTest()
-{
-	using namespace spi;
-
-	using cfg = Config<ClockDiv::DIV_128, Mode::MODE_0, Side::MASTER, BitOrder::MSB_FIRST, false>;
-	using driver = Hardware<cfg>;
-
-	Spi<driver> spiDriver;
-	spiDriver.init();
-	spiDriver.select(true);
-	spiDriver.transfer(0xff);
-}
-
-int main()
-{
-	spiTest();
-
-	return 0;
-}

spi/spi

@@ -1 +0,0 @@
-Subproject commit 70aabc07f64a33b04e3e9ee00627f5c120b1f9ef

spi/spi.cppproj

@@ -1,203 +0,0 @@
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-    <RamSnippetAddress>0x20000000</RamSnippetAddress>
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-    <preserveEEPROM>true</preserveEEPROM>
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-  </PropertyGroup>
-  <ItemGroup>
-    <Compile Include="clock.hpp">
-      <SubType>compile</SubType>
-    </Compile>
-    <Compile Include="io\io.hpp">
-      <SubType>compile</SubType>
-    </Compile>
-    <Compile Include="main.cpp">
-      <SubType>compile</SubType>
-    </Compile>
-    <Compile Include="spi\config.hpp">
-      <SubType>compile</SubType>
-    </Compile>
-    <Compile Include="spi\hardware.hpp">
-      <SubType>compile</SubType>
-    </Compile>
-    <Compile Include="spi\spi.hpp">
-      <SubType>compile</SubType>
-    </Compile>
-  </ItemGroup>
-  <ItemGroup>
-    <Folder Include="io" />
-    <Folder Include="spi" />
-  </ItemGroup>
-  <Import Project="$(AVRSTUDIO_EXE_PATH)\\Vs\\Compiler.targets" />
-</Project>