416 lines
10 KiB
C++
416 lines
10 KiB
C++
#pragma once
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#include <tuple>
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#include <type_traits>
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#include <utility>
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#include <cstddef>
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#include <cstdint>
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#include <cstring>
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#include "eink_spi.hpp"
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#include "font.hpp"
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#include "otp.hpp"
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#include "../clock.hpp"
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#include "../flash/flash.hpp"
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#include "../io/io.hpp"
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#include "../util/util.hpp"
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namespace eink {
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template <std::uint16_t Width, std::uint16_t Height, typename Spi, io::P RstPin, io::P BusyPin>
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class Eink {
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using word_t = typename Spi::word_t;
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struct original_lut_tag {
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};
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static io::Pin<RstPin> m_rst;
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static io::Pin<BusyPin> m_busy;
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public:
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enum class Cmd : std::uint8_t {
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DRIVER_OUTPUT_CONTROL = 0x01,
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DEEP_SLEEP_MODE = 0x10,
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DATA_ENTRY_MODE = 0x11,
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SW_RESET = 0x12,
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READ_TEMPERATURE_SENSOR = 0x18,
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UPDATE_DISPLAY = 0x20,
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DISPLAY_UPDATE_CONTROL_2 = 0x22,
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WRITE_RAM_BLACK = 0x24,
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WRITE_RAM_RED = 0x26,
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READ_RAM = 0x27,
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LOAD_OTP_TO_RAM = 0x31,
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WRITE_LUT = 0x32,
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BORDER_WAVEFORM_CONTROL = 0x3C,
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READ_RAM_CHANNEL = 0x41,
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SET_RAM_X_ADDR_POSITIONS = 0x44,
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SET_RAM_Y_ADDR_POSITIONS = 0x45,
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SET_RAM_X_ADDR = 0x4E,
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SET_RAM_Y_ADDR = 0x4F,
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};
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enum class Color : std::uint8_t {
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BLACK = 0x00,
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RED = 0x01,
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WHITE = 0x02,
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};
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enum class RamDirection : std::uint8_t {
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DECREMENT = 0,
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INCREMENT = 1,
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};
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enum class FastestMovingIndex : std::uint8_t {
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X = 0,
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Y = 1,
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};
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static void init()
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{
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m_rst.dir(io::Dir::OUT);
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m_busy.pullup(false);
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m_busy.dir(io::Dir::IN);
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Spi::init();
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reset();
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softReset();
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sendCommand(Cmd::DRIVER_OUTPUT_CONTROL);
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sendData(0xC7);
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sendData(0x00);
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sendData(0x01);
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setDataEntryMode(RamDirection::DECREMENT, RamDirection::INCREMENT, FastestMovingIndex::X);
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setRamRange();
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setRamXPos();
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setRamYPos();
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sendCommand(Cmd::BORDER_WAVEFORM_CONTROL);
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sendData(0x05);
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sendCommand(Cmd::READ_TEMPERATURE_SENSOR);
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sendData(0x80);
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waitUntilIdle();
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}
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static void sendCommand(const Cmd command)
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{
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Spi::select(true);
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Spi::write(static_cast<word_t>(command), true);
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Spi::select(false);
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}
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static void sendData(word_t data)
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{
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Spi::select(true);
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Spi::write(data, false);
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Spi::select(false);
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}
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static word_t readData()
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{
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Spi::select(true);
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const auto res = Spi::read();
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Spi::select(false);
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return res;
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}
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static void waitUntilIdle()
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{
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while (m_busy) {
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_delay_ms(100);
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}
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}
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static void reset()
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{
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m_rst = true;
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_delay_ms(200);
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m_rst = false;
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_delay_ms(10);
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m_rst = true;
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_delay_ms(200);
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waitUntilIdle();
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}
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static void softReset()
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{
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sendCommand(Cmd::SW_RESET);
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waitUntilIdle();
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}
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static void update()
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{
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update(original_lut_tag{});
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}
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template <typename Lut = original_lut_tag>
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static void update(const Lut &lut)
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{
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constexpr auto USE_ORIGINAL_LUT = std::is_same_v<Lut, original_lut_tag>;
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if constexpr (!USE_ORIGINAL_LUT) {
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writeLut(lut);
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}
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sendCommand(Cmd::DISPLAY_UPDATE_CONTROL_2);
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sendData(USE_ORIGINAL_LUT ? 0xF7 : 0xC7);
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sendCommand(Cmd::UPDATE_DISPLAY);
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waitUntilIdle();
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}
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template <typename RleImage>
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static void draw(const RleImage &rleImage)
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{
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setRamXPos();
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setRamYPos();
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constexpr auto sendImageChannel = [](const auto command, const auto &image) {
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using image_t = std::remove_cvref_t<decltype(image)>;
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sendCommand(command);
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for (auto j = std::size_t{0}; j < std::tuple_size_v<image_t>; ++j) {
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const auto [count, data] = flash::loadLike<RleImage>(image[j]);
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for (auto i = std::uint16_t{0}; i < count; ++i) {
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if (command == Cmd::WRITE_RAM_BLACK) {
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sendData(data);
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} else {
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sendData(~data);
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}
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}
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}
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};
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sendImageChannel(Cmd::WRITE_RAM_BLACK, std::get<0>(rleImage.value));
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sendImageChannel(Cmd::WRITE_RAM_RED, std::get<1>(rleImage.value));
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}
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static void clear(const Color color = Color::WHITE)
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{
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setRamXPos();
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setRamYPos();
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constexpr auto getFillData = [](const auto &color) -> std::pair<std::uint8_t, std::uint8_t> {
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switch (color) {
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case Color::BLACK:
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return {0x00, 0x00};
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case Color::RED:
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return {0xFF, 0xFF};
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case Color::WHITE:
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return {0xFF, 0x00};
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}
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return {0xFF, 0x00};
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};
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const auto fillData = getFillData(color);
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sendCommand(Cmd::WRITE_RAM_BLACK);
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for (auto i = std::uint16_t{0}; i < Width * Height / 8; i++) {
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sendData(fillData.first);
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}
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sendCommand(Cmd::WRITE_RAM_RED);
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for (auto i = std::uint16_t{0}; i < Width * Height / 8; i++) {
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sendData(fillData.second);
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}
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}
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static void drawText(const std::pair<std::uint8_t, std::uint8_t> &pos, const char *text,
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const Color textColor = Color::BLACK, const Color backgroundColor = Color::WHITE)
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{
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const auto textLength = std::strlen(text);
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constexpr auto getXScreenCoordinates = [](const std::uint8_t pos) { return (Width - pos - 1) / 8; };
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constexpr auto flipEndianness = [](const std::uint8_t value) {
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auto flippedVal = std::uint8_t{0};
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for (auto i = 0; i < 8; ++i) {
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const auto oldBit = (value >> i) & 1;
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flippedVal |= oldBit << (8 - i - 1);
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}
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return flippedVal;
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};
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const auto adjustColor = [&](const auto &data, const auto command) {
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auto backgroundData = data;
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auto outData = data & 0x00;
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if (command == Cmd::WRITE_RAM_BLACK) {
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if (backgroundColor == Color::BLACK) {
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backgroundData = 0x00;
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} else if (backgroundColor == Color::RED || backgroundColor == Color::WHITE) {
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backgroundData = 0xFF;
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}
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if (textColor == Color::BLACK) {
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outData = backgroundData & ~data;
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} else if (textColor == Color::RED || textColor == Color::WHITE) {
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outData = backgroundData | data;
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}
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} else {
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if (backgroundColor == Color::BLACK || backgroundColor == Color::WHITE) {
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backgroundData = 0x00;
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} else if (backgroundColor == Color::RED) {
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backgroundData = 0xFF;
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}
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if (textColor == Color::BLACK || textColor == Color::WHITE) {
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outData = backgroundData & ~data;
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} else if (textColor == Color::RED) {
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outData = backgroundData | data;
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}
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}
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return outData;
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};
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const auto sendChannel = [&](const auto command) {
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for (auto i = std::size_t{0}; i < textLength; ++i) {
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const auto posX = pos.first + i * 8;
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const auto screenPosX = getXScreenCoordinates(posX);
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setRamRange({screenPosX, screenPosX}, {pos.second, pos.second + 7});
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setRamXPos(screenPosX);
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setRamYPos(pos.second);
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sendCommand(command);
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for (auto j = std::uint8_t{0}; j < 8; ++j) {
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const auto fontByte = flash::loadLike<decltype(FONT_8X8)>(FONT_8X8.value[text[i]][j]);
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static_assert(std::is_same_v<std::remove_cvref_t<decltype(fontByte)>, std::uint8_t>);
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const auto dataByte = adjustColor(flipEndianness(fontByte), command);
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sendData(dataByte);
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}
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}
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};
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sendChannel(Cmd::WRITE_RAM_BLACK);
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sendChannel(Cmd::WRITE_RAM_RED);
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}
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template <typename Lut>
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static void writeLut(const Lut &lut)
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{
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static_assert(sizeof(lut) == sizeof(Waveform), "Invalid LUT size");
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sendCommand(Cmd::WRITE_LUT);
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for (auto i = std::size_t{0}; i < sizeof(lut); ++i) {
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const auto lutByte = lut[i];
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static_assert(std::is_same_v<std::byte, std::remove_cvref_t<decltype(lutByte)>>, "Invalid LUT value type");
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sendData(static_cast<word_t>(lutByte));
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}
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}
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static void autoPatternFill()
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{
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constexpr auto RED_PATTERN_FILL_CMD = static_cast<Cmd>(0x46);
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constexpr auto BLACK_PATTERN_FILL_CMD = static_cast<Cmd>(0x47);
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constexpr auto RED_PATTERN = 0b0'001'0'001;
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constexpr auto BLACK_PATTERN = 0b1'000'0'000;
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sendCommand(RED_PATTERN_FILL_CMD);
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sendData(RED_PATTERN);
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waitUntilIdle();
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sendCommand(BLACK_PATTERN_FILL_CMD);
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sendData(BLACK_PATTERN);
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waitUntilIdle();
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}
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static void setDataEntryMode(const RamDirection &xDir = RamDirection::INCREMENT,
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const RamDirection &yDir = RamDirection::INCREMENT,
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const FastestMovingIndex &fastestMovingIndex = FastestMovingIndex::X)
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{
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auto setting = static_cast<std::uint8_t>(xDir) << 0;
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setting |= static_cast<std::uint8_t>(yDir) << 1;
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setting |= static_cast<std::uint8_t>(fastestMovingIndex) << 2;
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sendCommand(Cmd::DATA_ENTRY_MODE);
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sendData(setting);
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}
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static void setRamRange(const std::pair<std::uint8_t, std::uint8_t> &xrange = {Width / 8 - 1, 0},
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const std::pair<std::uint16_t, std::uint16_t> &yrange = {0, Height - 1})
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{
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sendCommand(Cmd::SET_RAM_X_ADDR_POSITIONS);
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sendData(xrange.first & 0b00111111);
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sendData(xrange.second & 0b00111111);
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sendCommand(Cmd::SET_RAM_Y_ADDR_POSITIONS);
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sendData(yrange.first & 0xFF);
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sendData((yrange.first >> 8) & 0b1);
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sendData(yrange.second & 0xFF);
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sendData((yrange.second >> 8) & 0b1);
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}
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static void setRamXPos(const std::uint8_t pos = Width / 8 - 1)
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{
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sendCommand(Cmd::SET_RAM_X_ADDR);
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sendData(pos & 0b00111111);
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}
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static void setRamYPos(const std::uint16_t pos = 0)
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{
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sendCommand(Cmd::SET_RAM_Y_ADDR);
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sendData(pos & 0xFF);
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sendData((pos >> 8) & 0b1);
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}
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template <typename PrintFn>
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static void dumpOTP(PrintFn &&printFn)
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{
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constexpr auto byteWidth = Width / 8;
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constexpr auto ramHeight = Height + 46;
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constexpr auto xRamRange = std::pair<std::uint8_t, std::uint8_t>{0, byteWidth - 1};
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constexpr auto yRamRange = std::pair<std::uint16_t, std::uint16_t>{0, ramHeight - 1};
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setDataEntryMode(RamDirection::INCREMENT, RamDirection::INCREMENT, FastestMovingIndex::X);
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setRamRange(xRamRange, yRamRange);
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setRamXPos(0);
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setRamYPos(0);
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sendCommand(Cmd::WRITE_RAM_BLACK);
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for (auto i = std::uint16_t{0}; i < byteWidth * ramHeight; i++) {
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sendData(0xFF);
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}
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sendCommand(Cmd::WRITE_RAM_RED);
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for (auto i = std::uint16_t{0}; i < byteWidth * ramHeight; i++) {
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sendData(0x00);
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}
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//////////////////////////////////////////////////////////////////////////
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sendCommand(Cmd::DISPLAY_UPDATE_CONTROL_2);
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sendData(0x80);
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sendCommand(Cmd::UPDATE_DISPLAY);
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waitUntilIdle();
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sendCommand(Cmd::LOAD_OTP_TO_RAM);
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waitUntilIdle();
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setRamXPos(0);
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setRamYPos(0);
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sendCommand(Cmd::READ_RAM_CHANNEL);
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sendData(static_cast<word_t>(Color::BLACK));
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sendCommand(Cmd::READ_RAM);
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readData(); // First byte must be discarded
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for (auto i = std::size_t{0}; i < sizeof(OTP); ++i) {
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printFn(readData());
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}
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init();
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}
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static void sleep()
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{
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sendCommand(Cmd::DEEP_SLEEP_MODE);
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sendData(0x01);
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_delay_ms(100);
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}
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};
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} // namespace eink
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