/*!
* @file ILI9341_2.cpp
*
* @mainpage Adafruit ILI9341 TFT Displays
*
* @section intro_sec Introduction
*
* This is the documentation for Adafruit's ILI9341 driver for the
* Arduino platform.
*
* This library works with the Adafruit 2.8" Touch Shield V2 (SPI)
*    http://www.adafruit.com/products/1651
*
* Adafruit 2.4" TFT LCD with Touchscreen Breakout w/MicroSD Socket - ILI9341
*    https://www.adafruit.com/product/2478
*
* 2.8" TFT LCD with Touchscreen Breakout Board w/MicroSD Socket - ILI9341
*    https://www.adafruit.com/product/1770
*
* 2.2" 18-bit color TFT LCD display with microSD card breakout - ILI9340
*    https://www.adafruit.com/product/1770
*
* TFT FeatherWing - 2.4" 320x240 Touchscreen For All Feathers
*    https://www.adafruit.com/product/3315
*
* These displays use SPI to communicate, 4 or 5 pins are required
* to interface (RST is optional).
*
* Adafruit invests time and resources providing this open source code,
* please support Adafruit and open-source hardware by purchasing
* products from Adafruit!
*
* @section dependencies Dependencies
*
* This library depends on <a href="https://github.com/adafruit/Adafruit_GFX">
* Adafruit_GFX</a> being present on your system. Please make sure you have
* installed the latest version before using this library.
*
* @section author Author
*
* Written by Limor "ladyada" Fried for Adafruit Industries.
*
* @section license License
*
* BSD license, all text here must be included in any redistribution.
*
*/

//#ifdef ESP32
#include "ILI9341_2.h"
#include <limits.h>


// ESP32 uses 2. SPI BUS, ESP8266 uses software spi
#ifdef ESP32
#undef ILI9341_2_DIMMER
#define ILI9341_2_DIMMER
#undef ESP32_PWM_CHANNEL
#define ESP32_PWM_CHANNEL 1
#endif

#define ILI9341_2_HWSPI

#if defined (ILI9341_2_HWSPI)
#define SPI_BEGIN_TRANSACTION()    if (_hwspi)    spi2->beginTransaction(sspi2)
#define SPI_END_TRANSACTION()      if (_hwspi)    spi2->endTransaction()
#else
#define SPI_BEGIN_TRANSACTION()
#define SPI_END_TRANSACTION()
#endif



const uint16_t ili9341_2_colors[]={ILI9341_BLACK,ILI9341_WHITE,ILI9341_RED,ILI9341_GREEN,ILI9341_BLUE,ILI9341_CYAN,ILI9341_MAGENTA,\
  ILI9341_YELLOW,ILI9341_NAVY,ILI9341_DARKGREEN,ILI9341_DARKCYAN,ILI9341_MAROON,ILI9341_PURPLE,ILI9341_OLIVE,\
ILI9341_LIGHTGREY,ILI9341_DARKGREY,ILI9341_ORANGE,ILI9341_GREENYELLOW,ILI9341_PINK};

uint16_t ILI9341_2::GetColorFromIndex(uint8_t index) {
  if (index >= sizeof(ili9341_2_colors) / 2) index = 0;
  return ili9341_2_colors[index];
}

static const uint8_t PROGMEM ili9341_2_initcmd[] = {
  0xEF, 3, 0x03, 0x80, 0x02,
  0xCF, 3, 0x00, 0xC1, 0x30,
  0xED, 4, 0x64, 0x03, 0x12, 0x81,
  0xE8, 3, 0x85, 0x00, 0x78,
  0xCB, 5, 0x39, 0x2C, 0x00, 0x34, 0x02,
  0xF7, 1, 0x20,
  0xEA, 2, 0x00, 0x00,
  ILI9341_2_PWCTR1  , 1, 0x23,             // Power control VRH[5:0]
  ILI9341_2_PWCTR2  , 1, 0x10,             // Power control SAP[2:0];BT[3:0]
  ILI9341_2_VMCTR1  , 2, 0x3e, 0x28,       // VCM control
  ILI9341_2_VMCTR2  , 1, 0x86,             // VCM control2
  ILI9341_2_MADCTL  , 1, 0x48,             // Memory Access Control
  ILI9341_2_VSCRSADD, 1, 0x00,             // Vertical scroll zero
  ILI9341_2_PIXFMT  , 1, 0x55,
  ILI9341_2_FRMCTR1 , 2, 0x00, 0x18,
  ILI9341_2_DFUNCTR , 3, 0x08, 0x82, 0x27, // Display Function Control
  0xF2, 1, 0x00,                         // 3Gamma Function Disable
  ILI9341_2_GAMMASET , 1, 0x01,             // Gamma curve selected
  ILI9341_2_GMCTRP1 , 15, 0x0F, 0x31, 0x2B, 0x0C, 0x0E, 0x08, // Set Gamma
    0x4E, 0xF1, 0x37, 0x07, 0x10, 0x03, 0x0E, 0x09, 0x00,
  ILI9341_2_GMCTRN1 , 15, 0x00, 0x0E, 0x14, 0x03, 0x11, 0x07, // Set Gamma
    0x31, 0xC1, 0x48, 0x08, 0x0F, 0x0C, 0x31, 0x36, 0x0F,
  ILI9341_2_SLPOUT  , 0x80,                // Exit Sleep
  ILI9341_2_DISPON  , 0x80,                // Display on
//  ILI9341_2_DISPOFF  , 0x80,                // Display on
  0x00                                   // End of list
};

static const uint8_t PROGMEM ili9342_initcmd[] = {
  0xEF, 3, 0x03, 0x80, 0x02,
  0xCF, 3, 0x00, 0xC1, 0x30,
  0xED, 4, 0x64, 0x03, 0x12, 0x81,
  0xE8, 3, 0x85, 0x00, 0x78,
  0xCB, 5, 0x39, 0x2C, 0x00, 0x34, 0x02,
  0xF7, 1, 0x20,
  0xEA, 2, 0x00, 0x00,
  ILI9341_2_PWCTR1  , 1, 0x23,             // Power control VRH[5:0]
  ILI9341_2_PWCTR2  , 1, 0x10,             // Power control SAP[2:0];BT[3:0]
  ILI9341_2_VMCTR1  , 2, 0x2B, 0x2B,       // 0x3e, 0x28,       // VCM control
  ILI9341_2_VMCTR2  , 1, 0xC0,             // VCM control2
  ILI9341_2_MADCTL  , 1, 0x48,             // Memory Access Control
  ILI9341_2_VSCRSADD, 1, 0x00,             // Vertical scroll zero
  ILI9341_2_PIXFMT  , 1, 0x55,
  ILI9341_2_FRMCTR1 , 2, 0x00, 0x1B,
  ILI9341_2_DFUNCTR , 3, 0x08, 0x82, 0x27, // Display Function Control
  0xF2, 1, 0x00,                         // 3Gamma Function Disable
  ILI9341_2_GAMMASET , 1, 0x01,             // Gamma curve selected
  ILI9341_2_GMCTRP1 , 15, 0x0F, 0x31, 0x2B, 0x0C, 0x0E, 0x08, 0x4E, 0xF1, 0x37, 0x07, 0x10, 0x03, 0x0E, 0x09, 0x00,
  ILI9341_2_GMCTRN1 , 15, 0x00, 0x0E, 0x14, 0x03, 0x11, 0x07, 0x31, 0xC1, 0x48, 0x08, 0x0F, 0x0C, 0x31, 0x36, 0x0F,
  ILI9341_2_INVON  , 0x80,
  ILI9341_2_SLPOUT  , 0x80,                // Exit Sleep
  ILI9341_2_DISPON  , 0x80,                // Display on
  0x00                                   // End of list
};

ILI9341_2::ILI9341_2(int8_t cs, int8_t mosi, int8_t miso, int8_t sclk, int8_t res, int8_t dc, int8_t bp, int8_t spibus) : Renderer(ILI9341_TFTWIDTH, ILI9341_TFTHEIGHT) {
  _cs   = cs;
  _mosi  = mosi;
  _miso  = miso;
  _sclk = sclk;
  _res = res;
  _dc = dc;
  _bp = bp;
  _hwspi = 1;  // sign ili9341
  _spibus = spibus;
}

// special init for ILI9342 uses SPI1 previously defined with SDCard
ILI9341_2::ILI9341_2(int8_t cs, int8_t res, int8_t dc, int8_t bp) : Renderer(ILI9341_TFTWIDTH, ILI9341_TFTHEIGHT) {
  _cs   = cs;
  _res = res;
  _dc = dc;
  _bp = bp;
  _hwspi = 2; // sign ili9342
  _spibus = 1;
}

#define ILI9341_2_CS_LOW if (_cs>=0) digitalWrite( _cs, LOW);
#define ILI9341_2_CS_HIGH if (_cs>=0) digitalWrite( _cs, HIGH);


void ILI9341_2::writecmd(uint8_t d) {
  digitalWrite( _dc, LOW);
#ifdef ILI9341_2_HWSPI
  spi2->write(d);
#else
  spiwrite(d);
#endif
  digitalWrite( _dc, HIGH);
}

void ILI9341_2::init(uint16_t width, uint16_t height) {
  //sspi2 = SPISettings(2500000, MSBFIRST, SPI_MODE3);

  if (_hwspi == 2) {
    iwidth = ILI9341_TFTWIDTH;
    iheight = ILI9341_TFTHEIGHT;
  } else {
    iwidth = ILI9341_TFTHEIGHT;
    iheight = ILI9341_TFTWIDTH;
  }

#ifdef ILI9341_2_HWSPI

  sspi2 = SPISettings(40000000, MSBFIRST, SPI_MODE0);

  if (_hwspi==2) {
    spi2=&SPI;
  } else {
#ifdef ESP32
    if (_spibus == 2) {
      spi2 = new SPIClass(HSPI);
    } else {
      spi2 = &SPI;
    }
    spi2->begin(_sclk, _miso, _mosi, -1);
#else
    SPI.begin();
    spi2 = &SPI;
#endif
  }

#else
  pinMode(_mosi, OUTPUT);
  digitalWrite(_mosi,HIGH);
  pinMode(_sclk, OUTPUT);
  digitalWrite(_sclk,LOW);
  pinMode(_miso, INPUT);
#endif

  pinMode(_cs, OUTPUT);
  digitalWrite(_cs,HIGH);

  pinMode(_dc, OUTPUT);
  digitalWrite(_dc,HIGH);

  if (_bp >= 0) {
    pinMode(_bp, OUTPUT);
    digitalWrite(_bp,HIGH);
  }

  if (_res >= 0) {
    pinMode(_res, OUTPUT);
    digitalWrite(_res, HIGH);
    delay(100);
    digitalWrite(_res, LOW);
    delay(100);
    digitalWrite(_res, HIGH);
    delay(200);
  } else {
    SPI_BEGIN_TRANSACTION();
    ILI9341_2_CS_LOW
    writecmd(ILI9341_2_SWRESET); // software reset
    ILI9341_2_CS_HIGH
    SPI_END_TRANSACTION();
    delay(150);
  }

  if (_bp >= 0) {
#ifdef ILI9341_2_DIMMER
    ledcSetup(ESP32_PWM_CHANNEL, 4000, 8);
    ledcAttachPin(_bp, ESP32_PWM_CHANNEL);
    ledcWrite(ESP32_PWM_CHANNEL, 128);
#else
    pinMode(_bp, OUTPUT);
#endif
  }

  uint8_t        cmd, x, numArgs;
  const uint8_t *addr;

  if (_hwspi<2) {
    addr = ili9341_2_initcmd;
  } else {
    addr = ili9342_initcmd;
  }

  SPI_BEGIN_TRANSACTION();

  while ((cmd = pgm_read_byte(addr++)) > 0) {
      ILI9341_2_CS_LOW
      writecmd(cmd);
      x = pgm_read_byte(addr++);
      numArgs = x & 0x7F;

#ifdef ILI9341_2_HWSPI
      while (numArgs--) spi2->write(pgm_read_byte(addr++));
#else
      while (numArgs--) spiwrite(pgm_read_byte(addr++));
#endif

      ILI9341_2_CS_HIGH
      if (x & 0x80) delay(120);
  }
  SPI_END_TRANSACTION();
}

void ILI9341_2::DisplayInit(int8_t p,int8_t size,int8_t rot,int8_t font) {
//  SPI_BEGIN_TRANSACTION();
//  writecmd(ILI9341_2_INVOFF);
//  SPI_END_TRANSACTION();
  setRotation(rot);
  setTextFont(font&3);
  setTextSize(size&7);
  setTextColor(ILI9341_WHITE,ILI9341_BLACK);
  setCursor(0,0);
  fillScreen(ILI9341_BLACK);
}

void ILI9341_2::setAddrWindow(uint16_t x0, uint16_t y0, uint16_t x1, uint16_t y1) {

  if (!x0 && !y0 && !x1 && !y1) {
    ILI9341_2_CS_HIGH
    SPI_END_TRANSACTION();
  } else {
    ILI9341_2_CS_LOW
    SPI_BEGIN_TRANSACTION();
    setAddrWindow_int(x0,y0,x1-x0,y1-y0);
  }
}

void ILI9341_2::pushColors(uint16_t *data, uint16_t len, boolean first) {
  uint16_t color;

  while (len--) {
    color = *data++;
#ifdef ILI9341_2_HWSPI
    spi2->write16(color);
#else
    spiwrite16(color);
#endif
  }

}

void ILI9341_2::setAddrWindow_int(uint16_t x, uint16_t y, uint16_t w, uint16_t h) {
    uint32_t xa = ((uint32_t)x << 16) | (x+w-1);
    uint32_t ya = ((uint32_t)y << 16) | (y+h-1);


    writecmd(ILI9341_2_CASET); // Column addr set
#ifdef ILI9341_2_HWSPI
    spi2->write32(xa);
#else
    spiwrite32(xa);
#endif
    writecmd(ILI9341_2_PASET); // Row addr set

#ifdef ILI9341_2_HWSPI
    spi2->write32(ya);
#else
    spiwrite32(ya);
#endif
    writecmd(ILI9341_2_RAMWR); // write to RAM


}

void ILI9341_2::drawPixel(int16_t x, int16_t y, uint16_t color) {

  if((x < 0) ||(x >= _width) || (y < 0) || (y >= _height)) return;

  SPI_BEGIN_TRANSACTION();

  ILI9341_2_CS_LOW

  setAddrWindow_int(x,y,1,1);

#ifdef ILI9341_2_HWSPI
  spi2->write16(color);
#else
  spiwrite16(color);
#endif

  ILI9341_2_CS_HIGH

  SPI_END_TRANSACTION();
}


void ILI9341_2::setRotation(uint8_t m) {

  if (_hwspi < 2) {
    rotation = m % 4; // can't be higher than 3
    switch (rotation) {
        case 0:
            m = (MADCTL_2_MX | MADCTL_2_BGR);
            _width  = iwidth;
            _height = iheight;
            break;
        case 1:
            m = (MADCTL_2_MV | MADCTL_2_BGR);
            _width  = iheight;
            _height = iwidth;
            break;
        case 2:
            m = (MADCTL_2_MY | MADCTL_2_BGR);
            _width  = iwidth;
            _height = iheight;
            break;
        case 3:
            m = (MADCTL_2_MX | MADCTL_2_MY | MADCTL_2_MV | MADCTL_2_BGR);
            _width  = iheight;
            _height = iwidth;
            break;
    }

} else {

#define MADCTL_MY  0x80  ///< Bottom to top
#define MADCTL_MX  0x40  ///< Right to left
#define MADCTL_MV  0x20  ///< Reverse Mode
#define MADCTL_ML  0x10  ///< LCD refresh Bottom to top
#define MADCTL_RGB 0x00  ///< Red-Green-Blue pixel order
#define MADCTL_BGR 0x08  ///< Blue-Green-Red pixel order
#define MADCTL_MH  0x04  ///< LCD refresh right to left

    rotation = m % 4; // can't be higher than 3
    switch (rotation) {
        case 0:
            m = (MADCTL_BGR);
            _width  = iwidth;
            _height = iheight;
            break;
        case 1:
            m = (MADCTL_MV | MADCTL_BGR);
            _width  = iheight;
            _height = iwidth;
            break;
        case 2:
            m = (MADCTL_MY | MADCTL_BGR);
            _width  = iwidth;
            _height = iheight;
            break;
        case 3:
            m = (MADCTL_MX | MADCTL_MY | MADCTL_MV | MADCTL_BGR);
            _width  = iheight;
            _height = iwidth;
            break;
    }
  }
  SPI_BEGIN_TRANSACTION();
  ILI9341_2_CS_LOW
  writecmd(ILI9341_2_MADCTL);
  spiwrite(m);
  ILI9341_2_CS_HIGH
  SPI_END_TRANSACTION();
}


void ILI9341_2::drawFastVLine(int16_t x, int16_t y, int16_t h, uint16_t color) {

  // Rudimentary clipping
  if ((x >= _width) || (y >= _height)) return;
  if ((y + h - 1) >= _height) h = _height - y;

  SPI_BEGIN_TRANSACTION();

  ILI9341_2_CS_LOW

  setAddrWindow_int(x, y, 1, h);

  while (h--) {
#ifdef ILI9341_2_HWSPI
    spi2->write16(color);
#else
    spiwrite16(color);
#endif
  }

  ILI9341_2_CS_HIGH

  SPI_END_TRANSACTION();
}

void ILI9341_2::drawFastHLine(int16_t x, int16_t y, int16_t w, uint16_t color) {

  // Rudimentary clipping
  if((x >= _width) || (y >= _height)) return;
  if((x+w-1) >= _width)  w = _width-x;


  SPI_BEGIN_TRANSACTION();

  ILI9341_2_CS_LOW

  setAddrWindow_int(x, y, w, 1);


  while (w--) {
#ifdef ILI9341_2_HWSPI
    spi2->write16(color);
#else
    spiwrite16(color);
#endif
  }

  ILI9341_2_CS_HIGH

  SPI_END_TRANSACTION();
}

void ILI9341_2::fillScreen(uint16_t color) {
  fillRect(0, 0,  _width, _height, color);
}

// fill a rectangle
void ILI9341_2::fillRect(int16_t x, int16_t y, int16_t w, int16_t h, uint16_t color) {

  // rudimentary clipping (drawChar w/big text requires this)
  if((x >= _width) || (y >= _height)) return;
  if((x + w - 1) >= _width)  w = _width  - x;
  if((y + h - 1) >= _height) h = _height - y;


  SPI_BEGIN_TRANSACTION();

  ILI9341_2_CS_LOW

  setAddrWindow_int(x, y, w, h);

  for (y=h; y>0; y--) {
    for (x=w; x>0; x--) {
#ifdef ILI9341_2_HWSPI
      spi2->write16(color);
#else
      spiwrite16(color);
#endif
    }
  }
  ILI9341_2_CS_HIGH

  SPI_END_TRANSACTION();
}



void ili9342_bpwr(uint8_t on);

void ILI9341_2::DisplayOnff(int8_t on) {

  if (_hwspi==2) {
    ili9342_bpwr(on);
  }

  if (on) {
    SPI_BEGIN_TRANSACTION();
    ILI9341_2_CS_LOW
    writecmd(ILI9341_2_DISPON);
    ILI9341_2_CS_HIGH
    SPI_END_TRANSACTION();
    if (_bp>=0) {
#ifdef ILI9341_2_DIMMER
      ledcWrite(ESP32_PWM_CHANNEL,dimmer);
#else
      digitalWrite(_bp,HIGH);
#endif
    }
  } else {
    SPI_BEGIN_TRANSACTION();
    ILI9341_2_CS_LOW
    writecmd(ILI9341_2_DISPOFF);
    ILI9341_2_CS_HIGH
    SPI_END_TRANSACTION();
    if (_bp>=0) {
#ifdef ILI9341_2_DIMMER
      ledcWrite(ESP32_PWM_CHANNEL,0);
#else
      digitalWrite(_bp,LOW);
#endif
    }
  }
}

void ILI9341_2::invertDisplay(boolean i) {
  ILI9341_2_CS_LOW
  writecmd(i ? ILI9341_2_INVON : ILI9341_2_INVOFF);
  ILI9341_2_CS_HIGH
}

void ili9342_dimm(uint8_t dim);

// dimmer 0-100
void ILI9341_2::dim(uint8_t dim) {
  dimmer = dim;
  if (dimmer>15) dimmer=15;
  dimmer=((float)dimmer/15.0)*255.0;
#ifdef ESP32
  if (_bp>=0) {
    ledcWrite(ESP32_PWM_CHANNEL,dimmer);
  } else {
    if (_hwspi==2) {
      ili9342_dimm(dim);
    }
  }
#endif
}


void ILI9341_2::spiwrite(uint8_t c) {

#ifdef ILI9341_2_HWSPI
  spi2->write(c);
#else
  for (uint8_t bit = 0x80; bit; bit >>= 1) {
	   digitalWrite(_sclk, LOW);
	    if (c & bit) digitalWrite(_mosi, HIGH);
	    else        digitalWrite(_mosi, LOW);
	    digitalWrite(_sclk, HIGH);
  }
#endif

}

void ILI9341_2::spiwrite16(uint16_t c) {
#ifdef ILI9341_2_HWSPI
    spi2->write16(c);
#else
    spiwrite(c>>8);
    spiwrite(c);
#endif
}

void ILI9341_2::spiwrite32(uint32_t c) {
#ifdef ILI9341_2_HWSPI
    spi2->write32(c);
#else
    spiwrite(c>>24);
    spiwrite(c>>16);
    spiwrite(c>>8);
    spiwrite(c);
#endif
}

void ILI9341_2::setScrollMargins(uint16_t top, uint16_t bottom) {
  uint16_t height = _height - (top + bottom);
  SPI_BEGIN_TRANSACTION();
  ILI9341_2_CS_LOW
  writecmd(0x33);

  spiwrite16(top);
  spiwrite16(height);
  spiwrite16(bottom);
  ILI9341_2_CS_HIGH
  SPI_END_TRANSACTION();
}


void ILI9341_2::scrollTo(uint16_t y) {
    SPI_BEGIN_TRANSACTION();
    ILI9341_2_CS_LOW
    writecmd(ILI9341_2_VSCRSADD);
    spiwrite16(y);
    ILI9341_2_CS_HIGH
    SPI_END_TRANSACTION();
}