From 5cd2b963fae7ee15a61061ee038afa6b4fd7562d Mon Sep 17 00:00:00 2001
From: BlackMark <me@blackmark.me>
Date: Sun, 28 Jul 2019 12:16:09 +0200
Subject: [PATCH] Added proof of concept for using hardware0 in SPI mode

---
 uart/main.cpp     | 84 +++++++++++++++++++++++++++++++++++++++++++++--
 uart/uart         |  2 +-
 uart/uart.cppproj | 20 +++++------
 3 files changed, 93 insertions(+), 13 deletions(-)

diff --git a/uart/main.cpp b/uart/main.cpp
index 09cd3df..0608edb 100644
--- a/uart/main.cpp
+++ b/uart/main.cpp
@@ -207,12 +207,15 @@ void usartTestUsage()
 
 void newUartUsage()
 {
-	using settings = uart::settings<9600, uart::DataBits::EIGHT, uart::Parity::NONE, uart::StopBits::ONE>;
-	using uart0 = uart::detail::hardware0<settings, uart::Mode::ASYNCHRONOUS>;
+	using config = uart::config<9600, uart::DataBits::EIGHT, uart::Parity::NONE, uart::StopBits::ONE>;
+	using uart0 = uart::hardware0<uart::Mode::ASYNCHRONOUS, config>;
+	using softuart = uart::software<io::P::B1, io::P::B2, config>;
 
 	uart::uart<uart0> serial;
+	uart::uart<softuart> softSerial;
 
 	serial << "Hello World using finalized interface!" << F("\r\nAlso works from progmem\r\n");
+	// softSerial << "Hello World using finalized software interface!" << F("\r\nAlso greetz from progmem\r\n");
 }
 
 void oldUsartUsage()
@@ -226,11 +229,88 @@ void oldUsartUsage()
 	_delay_ms(1000);
 }
 
+namespace spi {
+
+enum class Cpol {
+	MODE_0,
+	MODE_1,
+};
+
+enum class Cpha {
+	MODE_0,
+	MODE_1,
+};
+
+enum class DataOrder {
+	MSB,
+	LSB,
+};
+
+template <const Cpol cpol, const Cpha cpha, const 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<Mode::SPI, config> {
+  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<uart::Mode::SPI, config>;
+
+	spi::spi<uartspi> uartSpi;
+}
+
 int main()
 {
 	usartTestUsage();
 	newUartUsage();
 	oldUsartUsage();
 
+	spiTest();
+
 	return 0;
 }
diff --git a/uart/uart b/uart/uart
index f08f607..29b4d85 160000
--- a/uart/uart
+++ b/uart/uart
@@ -1 +1 @@
-Subproject commit f08f607265cd316714d0db6fde5807e1c6320a72
+Subproject commit 29b4d85ce3e2a5467dc378f029b94fa35cb6c793
diff --git a/uart/uart.cppproj b/uart/uart.cppproj
index b61b2d5..31aafa1 100644
--- a/uart/uart.cppproj
+++ b/uart/uart.cppproj
@@ -61,15 +61,15 @@
     </AAFDebugger>
     <AsfFrameworkConfig>
       <framework-data xmlns="">
-  <options />
-  <configurations />
-  <files />
-  <documentation help="" />
-  <offline-documentation help="" />
-  <dependencies>
-    <content-extension eid="atmel.asf" uuidref="Atmel.ASF" version="3.46.0" />
-  </dependencies>
-</framework-data>
+        <options />
+        <configurations />
+        <files />
+        <documentation help="" />
+        <offline-documentation help="" />
+        <dependencies>
+          <content-extension eid="atmel.asf" uuidref="Atmel.ASF" version="3.46.0" />
+        </dependencies>
+      </framework-data>
     </AsfFrameworkConfig>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(Configuration)' == 'Release' ">
@@ -211,7 +211,7 @@
     <Compile Include="uart\hardware1.hpp">
       <SubType>compile</SubType>
     </Compile>
-    <Compile Include="uart\settings.hpp">
+    <Compile Include="uart\config.hpp">
       <SubType>compile</SubType>
     </Compile>
     <Compile Include="uart\software.hpp">