Refactor interface to be fully static

eink.hpp

@@ -7,143 +7,155 @@
 #include "../clock.hpp"
 #include "../io/io.hpp"
 
-template <typename Spi>
-class Epd {
-	static constexpr auto width = uint16_t{200};
-	static constexpr auto height = uint16_t{200};
+namespace eink {
 
-	io::Pin<io::P::C1> m_rst;
-	io::Pin<io::P::C0> m_dc;
-	io::Pin<io::P::C2> m_bsy;
+template <uint16_t Width, uint16_t Height, typename Spi, io::P RstPin, io::P DcPin, io::P BusyPin>
+class Eink {
+	struct Cmd {
+		static constexpr auto SW_RESET = uint8_t{0x12};
+		static constexpr auto DRIVER_OUTPUT_CONTROL = uint8_t{0x01};
+		static constexpr auto DATA_ENTRY_MODE = uint8_t{0x11};
+		static constexpr auto SET_RAM_X_ADDR_POSITIONS = uint8_t{0x44};
+		static constexpr auto SET_RAM_Y_ADDR_POSITIONS = uint8_t{0x45};
+		static constexpr auto BORDER_WAVEFORM_CONTROL = uint8_t{0x3C};
+		static constexpr auto READ_TEMPERATURE_SENSOR = uint8_t{0x18};
+		static constexpr auto SET_RAM_X_ADDR = uint8_t{0x4E};
+		static constexpr auto SET_RAM_Y_ADDR = uint8_t{0x4F};
+		static constexpr auto WRITE_RAM_BLACK = uint8_t{0x24};
+		static constexpr auto WRITE_RAM_RED = uint8_t{0x26};
+		static constexpr auto DISPLAY_UPDATE_CONTROL_2 = uint8_t{0x22};
+		static constexpr auto UPDATE_DISPLAY = uint8_t{0x20};
+		static constexpr auto DEEP_SLEEP_MODE = uint8_t{0x10};
+	};
+
+	static io::Pin<RstPin> m_rst;
+	static io::Pin<DcPin> m_dc;
+	static io::Pin<BusyPin> m_bsy;
 
   public:
-	Epd() = default;
-	~Epd() = default;
-
-	int Init()
+	static void init()
 	{
 		m_rst.dir(io::Dir::OUT);
 		m_dc.dir(io::Dir::OUT);
 		m_bsy.dir(io::Dir::IN);
 		Spi::init();
 
-		/* EPD hardware init start */
-		Reset();
+		reset();
 
-		WaitUntilIdle();
-		SendCommand(0x12); // SWRESET
-		WaitUntilIdle();
+		waitUntilIdle();
+		sendCommand(Cmd::SW_RESET);
+		waitUntilIdle();
 
-		SendCommand(0x01); // Driver output control
-		SendData(0xC7);
-		SendData(0x00);
-		SendData(0x01);
+		sendCommand(Cmd::DRIVER_OUTPUT_CONTROL);
+		sendData(0xC7);
+		sendData(0x00);
+		sendData(0x01);
 
-		SendCommand(0x11); // data entry mode
-		SendData(0x01);
+		sendCommand(Cmd::DATA_ENTRY_MODE);
+		sendData(0x01);
 
-		SendCommand(0x44); // set Ram-X address start/end position
-		SendData(0x00);
-		SendData(0x18); // 0x18-->(24+1)*8=200
+		sendCommand(Cmd::SET_RAM_X_ADDR_POSITIONS);
+		sendData(0x00);
+		sendData((Width / 8) - 1);
 
-		SendCommand(0x45); // set Ram-Y address start/end position
-		SendData(0xC7);    // 0xC7-->(199+1)=200
-		SendData(0x00);
-		SendData(0x00);
-		SendData(0x00);
+		sendCommand(Cmd::SET_RAM_Y_ADDR_POSITIONS);
+		sendData(Height - 1);
+		sendData(0x00);
+		sendData(0x00);
+		sendData(0x00);
 
-		SendCommand(0x3C); // BorderWavefrom
-		SendData(0x05);
+		sendCommand(Cmd::BORDER_WAVEFORM_CONTROL);
+		sendData(0x05);
 
-		SendCommand(0x18); // Read built-in temperature sensor
-		SendData(0x80);
+		sendCommand(Cmd::READ_TEMPERATURE_SENSOR);
+		sendData(0x80);
 
-		SendCommand(0x4E); // set RAM x address count to 0;
-		SendData(0x00);
-		SendCommand(0x4F); // set RAM y address count to 0X199;
-		SendData(0xC7);
-		SendData(0x00);
-		WaitUntilIdle();
+		sendCommand(Cmd::SET_RAM_X_ADDR);
+		sendData(0x00);
 
-		/* EPD hardware init end */
+		sendCommand(Cmd::SET_RAM_Y_ADDR);
+		sendData(Height - 1);
+		sendData(0x00);
 
-		return 0;
+		waitUntilIdle();
 	}
 
-	void SendCommand(unsigned char command)
+	static void sendCommand(const uint8_t command)
 	{
 		m_dc = false;
-		SpiTransfer(command);
+		spiTransfer(command);
 	}
 
-	void SendData(unsigned char data)
+	static void sendData(const uint8_t data)
 	{
 		m_dc = true;
-		SpiTransfer(data);
+		spiTransfer(data);
 	}
 
-	void WaitUntilIdle()
+	static void waitUntilIdle()
 	{
 		while (m_bsy) {
 			_delay_ms(100);
 		}
 	}
 
-	void Reset()
+	static void reset()
 	{
 		m_rst = true;
 		_delay_ms(200);
-		m_rst = false; // module reset
+		m_rst = false;
 		_delay_ms(10);
 		m_rst = true;
 		_delay_ms(200);
 	}
 
-	void DisplayFrame(const unsigned char *frame_buffer_black, const unsigned char *frame_buffer_red)
+	static void draw(const uint8_t *blackFrame, const uint8_t *redFrame)
 	{
-		SendCommand(0x24);
-		for (auto i = uint16_t{0}; i < width * height / 8; i++) {
-			SendData(pgm_read_byte(&frame_buffer_black[i]));
+		sendCommand(Cmd::WRITE_RAM_BLACK);
+		for (auto i = uint16_t{0}; i < Width * Height / 8; i++) {
+			sendData(pgm_read_byte(&blackFrame[i]));
 		}
-		SendCommand(0x26);
-		for (auto i = uint16_t{0}; i < width * height / 8; i++) {
-			SendData(~pgm_read_byte(&frame_buffer_red[i]));
+		sendCommand(Cmd::WRITE_RAM_RED);
+		for (auto i = uint16_t{0}; i < Width * Height / 8; i++) {
+			sendData(~pgm_read_byte(&redFrame[i]));
 		}
 
-		SendCommand(0x22);
-		SendData(0xF7);
-		SendCommand(0x20);
-		WaitUntilIdle();
+		sendCommand(Cmd::DISPLAY_UPDATE_CONTROL_2);
+		sendData(0xF7);
+		sendCommand(Cmd::UPDATE_DISPLAY);
+		waitUntilIdle();
 	}
 
-	void DisplayClear()
+	static void clear()
 	{
-		SendCommand(0x24);
-		for (auto i = uint16_t{0}; i < width * height / 8; i++) {
-			SendData(0xff);
+		sendCommand(Cmd::WRITE_RAM_BLACK);
+		for (auto i = uint16_t{0}; i < Width * Height / 8; i++) {
+			sendData(0xff);
 		}
-		SendCommand(0x26);
-		for (auto i = uint16_t{0}; i < width * height / 8; i++) {
-			SendData(0x00);
+		sendCommand(Cmd::WRITE_RAM_RED);
+		for (auto i = uint16_t{0}; i < Width * Height / 8; i++) {
+			sendData(0x00);
 		}
 
-		SendCommand(0x22);
-		SendData(0xF7);
-		SendCommand(0x20);
-		WaitUntilIdle();
+		sendCommand(Cmd::DISPLAY_UPDATE_CONTROL_2);
+		sendData(0xF7);
+		sendCommand(Cmd::UPDATE_DISPLAY);
+		waitUntilIdle();
 	}
 
-	void Sleep()
+	static void sleep()
 	{
-		SendCommand(0x10); // power setting
-		SendData(0x01);    // gate switch to external
+		sendCommand(Cmd::DEEP_SLEEP_MODE);
+		sendData(0x01);
 		_delay_ms(100);
 	}
 
-	void SpiTransfer(unsigned char data)
+	static void spiTransfer(const uint8_t data)
 	{
 		Spi::select(true);
 		Spi::transfer(data);
 		Spi::select(false);
 	}
 };
+
+} // namespace eink