sensor_main/include/tft.hpp

#pragma once

extern "C" {
#include <hardware/spi.h>
#include <pico/stdlib.h>
}

class TFT {
 public:
  TFT(uint cs, uint dc, uint rst, uint sck, uint sda)
      : PinCs(cs), PinDc(dc), PinRst(rst), PinSck(sck), PinSda(sda) {}
  ~TFT() = default;

  enum class CMD : uint8_t {
    NOP = 0x00,
    SWRESET = 0x01,
    SLPIN = 0x10,
    SLPOUT = 0x11,
    INVOFF = 0x20,
    INVON = 0x21,
    DISPON = 0x29,
    CASET = 0x2A,
    RASET = 0x2B,
    RAMWR = 0x2C,
    MADCTL = 0x36,
    COLMOD = 0x3A,
    FRMCTR1 = 0xB1,
    FRMCTR2 = 0xB2,
    FRMCTR3 = 0xB3,
    INVCTR = 0xB4,
    PWCTR1 = 0xC0,
    PWCTR2 = 0xC1,
    PWCTR3 = 0xC2,
    PWCTR4 = 0xC3,
    PWCTR5 = 0xC4,
    VMCTR1 = 0xC5,
    GMCTRP1 = 0xE0,
    GMCTRN1 = 0xE1,
    NORON = 0x13,
  };

  void Init() {
    spi_init(spi0, 20 * 1000 * 1000);
    gpio_set_function(PinSck, GPIO_FUNC_SPI);
    gpio_set_function(PinSda, GPIO_FUNC_SPI);

    gpio_init(PinCs);
    gpio_init(PinDc);
    gpio_init(PinRst);
    gpio_set_dir(PinCs, GPIO_OUT);
    gpio_set_dir(PinDc, GPIO_OUT);
    gpio_set_dir(PinRst, GPIO_OUT);
    gpio_put(PinCs, 1);
    gpio_put(PinDc, 1);
    gpio_put(PinRst, 1);

    Reset();

    // Init sequence Oder so
    WriteCmd(CMD::SWRESET);
    sleep_ms(150);
    WriteCmd(CMD::SLPOUT);
    sleep_ms(150);
    WriteCmd(CMD::FRMCTR1);
    WriteData(0x01);
    WriteData(0x2C);
    WriteData(0x2D);
    WriteCmd(CMD::FRMCTR2);
    WriteData(0x01);
    WriteData(0x2C);
    WriteData(0x2D);
    WriteCmd(CMD::FRMCTR3);
    WriteData(0x01);
    WriteData(0x2C);
    WriteData(0x2D);
    WriteData(0x01);
    WriteData(0x2C);
    WriteData(0x2D);
    WriteCmd(CMD::INVCTR);
    WriteData(0x07);
    WriteCmd(CMD::PWCTR1);
    WriteData(0xA2);
    WriteData(0x02);
    WriteData(0x84);
    WriteCmd(CMD::PWCTR2);
    WriteData(0xC5);
    WriteCmd(CMD::PWCTR3);
    WriteData(0x0A);
    WriteData(0x00);
    WriteCmd(CMD::PWCTR4);
    WriteData(0x8A);
    WriteData(0x2A);
    WriteCmd(CMD::PWCTR5);
    WriteData(0x8A);
    WriteData(0xEE);
    WriteCmd(CMD::VMCTR1);
    WriteData(0x0E);
    WriteCmd(CMD::INVOFF);
    WriteCmd(CMD::MADCTL);
    WriteData(0xC8);
    WriteCmd(CMD::COLMOD);
    WriteData(0x05);  // 16-bit color
    WriteCmd(CMD::CASET);
    WriteData(0);
    WriteData(0);
    WriteData(0);
    WriteData(127);
    WriteCmd(CMD::RASET);
    WriteData(0);
    WriteData(0);
    WriteData(0);
    WriteData(159);
    WriteCmd(CMD::GMCTRP1);
    WriteData(0x02);
    WriteData(0x1c);
    WriteData(0x07);
    WriteData(0x12);
    WriteData(0x37);
    WriteData(0x32);
    WriteData(0x29);
    WriteData(0x2d);
    WriteData(0x29);
    WriteData(0x25);
    WriteData(0x2B);
    WriteData(0x39);
    WriteData(0x00);
    WriteData(0x01);
    WriteData(0x03);
    WriteData(0x10);
    WriteCmd(CMD::GMCTRN1);
    WriteData(0x03);
    WriteData(0x1d);
    WriteData(0x07);
    WriteData(0x06);
    WriteData(0x2E);
    WriteData(0x2C);
    WriteData(0x29);
    WriteData(0x2D);
    WriteData(0x2E);
    WriteData(0x2E);
    WriteData(0x37);
    WriteData(0x3F);
    WriteData(0x00);
    WriteData(0x00);
    WriteData(0x02);
    WriteData(0x10);
    WriteCmd(CMD::NORON);
    sleep_ms(10);
    WriteCmd(CMD::DISPON);
    sleep_ms(100);
  }

  void SetWindow(uint8_t x, uint8_t y, uint8_t x1, uint8_t y1) {
    WriteCmd(CMD::CASET);
    WriteData(0x00);
    WriteData(x);
    WriteData(0x00);
    WriteData(x1);
    WriteCmd(CMD::RASET);
    WriteData(0x00);
    WriteData(y);
    WriteData(0x00);
    WriteData(y1);

    WriteCmd(CMD::RAMWR);
  }

  void DrawPixel(uint8_t x, uint8_t y, uint16_t color) {
    SetWindow(x, y, x, y);
    WriteData16(color);
  }

  void DrawRect(uint8_t x, uint8_t y, uint8_t w, uint8_t h, uint16_t color) {
    SetWindow(x, y, w, h);
    for (int i = 0; i < w * h; i++) {
      WriteData16(color);
    }
  }

  void Reset() {
    gpio_put(PinRst, 0);
    sleep_ms(50);
    gpio_put(PinRst, 1);
    sleep_ms(50);
  }

  void WriteCmd(CMD cmd) { WriteCmd((uint8_t)cmd); }

  void WriteCmd(uint8_t cmd) {
    gpio_put(PinDc, 0);  // Command Mode
    gpio_put(PinCs, 0);
    spi_write_blocking(spi0, &cmd, 1);
    gpio_put(PinCs, 1);
  }

  void WriteData(uint8_t data) {
    gpio_put(PinDc, 1);  // Data Mode
    gpio_put(PinCs, 0);
    spi_write_blocking(spi0, &data, 1);
    gpio_put(PinCs, 1);
  }

  void WriteData16(uint16_t data) {
    uint8_t d8[2] = {uint8_t(data >> 8), uint8_t(data & 0xff)};
    gpio_put(PinDc, 1);  // Data Mode
    gpio_put(PinCs, 0);
    spi_write_blocking(spi0, d8, 2);
    gpio_put(PinCs, 1);
  }

  uint PinCs = 0;
  uint PinDc = 0;
  uint PinRst = 0;
  uint PinSck = 0;
  uint PinSda = 0;
};