Arduino_ESP32PAR8QQQ.cpp
#include "Arduino_ESP32PAR8QQQ.h"

#if defined(ESP32) && (CONFIG_IDF_TARGET_ESP32 || CONFIG_IDF_TARGET_ESP32S2 || CONFIG_IDF_TARGET_ESP32S3)

Arduino_ESP32PAR8QQQ::Arduino_ESP32PAR8QQQ(
    int8_t dc, int8_t cs, int8_t wr, int8_t rd,
    int8_t d0, int8_t d1, int8_t d2, int8_t d3, int8_t d4, int8_t d5, int8_t d6, int8_t d7)
    : _dc(dc), _cs(cs), _wr(wr), _rd(rd),
      _d0(d0), _d1(d1), _d2(d2), _d3(d3), _d4(d4), _d5(d5), _d6(d6), _d7(d7)
{
}

bool Arduino_ESP32PAR8QQQ::begin(int32_t, int8_t)
{
  pinMode(_dc, OUTPUT);
  digitalWrite(_dc, HIGH); // Data mode
  if (_dc >= 32)
  {
    _dcPinMask = digitalPinToBitMask(_dc);
    _dcPortSet = (PORTreg_t)GPIO_OUT1_W1TS_REG;
    _dcPortClr = (PORTreg_t)GPIO_OUT1_W1TC_REG;
  }
  else
  {
    _dcPinMask = digitalPinToBitMask(_dc);
    _dcPortSet = (PORTreg_t)GPIO_OUT_W1TS_REG;
    _dcPortClr = (PORTreg_t)GPIO_OUT_W1TC_REG;
  }

  if (_cs != GFX_NOT_DEFINED)
  {
    pinMode(_cs, OUTPUT);
    digitalWrite(_cs, HIGH); // disable chip select
  }
  if (_cs >= 32)
  {
    _csPinMask = digitalPinToBitMask(_cs);
    _csPortSet = (PORTreg_t)GPIO_OUT1_W1TS_REG;
    _csPortClr = (PORTreg_t)GPIO_OUT1_W1TC_REG;
  }
  else if (_cs != GFX_NOT_DEFINED)
  {
    _csPinMask = digitalPinToBitMask(_cs);
    _csPortSet = (PORTreg_t)GPIO_OUT_W1TS_REG;
    _csPortClr = (PORTreg_t)GPIO_OUT_W1TC_REG;
  }

  pinMode(_wr, OUTPUT);
  digitalWrite(_wr, HIGH); // Set write strobe high (inactive)
  if (_wr >= 32)
  {
    _wrPinMask = digitalPinToBitMask(_wr);
    _wrPortSet = (PORTreg_t)GPIO_OUT1_W1TS_REG;
    _wrPortClr = (PORTreg_t)GPIO_OUT1_W1TC_REG;
  }
  else
  {
    _wrPinMask = digitalPinToBitMask(_wr);
    _wrPortSet = (PORTreg_t)GPIO_OUT_W1TS_REG;
    _wrPortClr = (PORTreg_t)GPIO_OUT_W1TC_REG;
  }

  if (_rd != GFX_NOT_DEFINED)
  {
    pinMode(_rd, OUTPUT);
    digitalWrite(_rd, HIGH);
  }

  // TODO: check pin range 0-31
  pinMode(_d0, OUTPUT);
  pinMode(_d1, OUTPUT);
  pinMode(_d2, OUTPUT);
  pinMode(_d3, OUTPUT);
  pinMode(_d4, OUTPUT);
  pinMode(_d5, OUTPUT);
  pinMode(_d6, OUTPUT);
  pinMode(_d7, OUTPUT);

  if (_d0 >= 32)
  {
    _dataPortSet = (PORTreg_t)GPIO_OUT1_W1TS_REG;
    _dataPortClr = (PORTreg_t)GPIO_OUT1_W1TC_REG;
  }
  else
  {
    _dataPortSet = (PORTreg_t)GPIO_OUT_W1TS_REG;
    _dataPortClr = (PORTreg_t)GPIO_OUT_W1TC_REG;
  }

  // INIT 8-bit mask
  _dataClrMask = digitalPinToBitMask(_d0) | digitalPinToBitMask(_d1) | digitalPinToBitMask(_d2) | digitalPinToBitMask(_d3) | digitalPinToBitMask(_d4) | digitalPinToBitMask(_d5) | digitalPinToBitMask(_d6) | digitalPinToBitMask(_d7);

  for (int32_t c = 0; c < 256; c++)
  {
    _xset_mask[c] = digitalPinToBitMask(_wr);
    if (c & 0x01)
    {
      _xset_mask[c] |= digitalPinToBitMask(_d0);
    }
    if (c & 0x02)
    {
      _xset_mask[c] |= digitalPinToBitMask(_d1);
    }
    if (c & 0x04)
    {
      _xset_mask[c] |= digitalPinToBitMask(_d2);
    }
    if (c & 0x08)
    {
      _xset_mask[c] |= digitalPinToBitMask(_d3);
    }
    if (c & 0x10)
    {
      _xset_mask[c] |= digitalPinToBitMask(_d4);
    }
    if (c & 0x20)
    {
      _xset_mask[c] |= digitalPinToBitMask(_d5);
    }
    if (c & 0x40)
    {
      _xset_mask[c] |= digitalPinToBitMask(_d6);
    }
    if (c & 0x80)
    {
      _xset_mask[c] |= digitalPinToBitMask(_d7);
    }
  }
  *_dataPortClr = _dataClrMask;

  return true;
}

void Arduino_ESP32PAR8QQQ::beginWrite()
{
  DC_HIGH();
  CS_LOW();
}

void Arduino_ESP32PAR8QQQ::endWrite()
{
  CS_HIGH();
}

void Arduino_ESP32PAR8QQQ::writeCommand(uint8_t c)
{
  DC_LOW();

  WRITE(c);

  DC_HIGH();
}

void Arduino_ESP32PAR8QQQ::writeCommand16(uint16_t c)
{
  DC_LOW();

  _data16.value = c;
  WRITE(_data16.msb);
  WRITE(_data16.lsb);

  DC_HIGH();
}

void Arduino_ESP32PAR8QQQ::writeCommandBytes(uint8_t *data, uint32_t len)
{
  DC_LOW();

  while (len--)
  {
    WRITE(*data++);
  }

  DC_HIGH();
}

void Arduino_ESP32PAR8QQQ::write(uint8_t d)
{
  WRITE(d);
}

void Arduino_ESP32PAR8QQQ::write16(uint16_t d)
{
  _data16.value = d;
  WRITE(_data16.msb);
  WRITE(_data16.lsb);
}

void Arduino_ESP32PAR8QQQ::writeRepeat(uint16_t p, uint32_t len)
{
  _data16.value = p;
  if (_data16.msb == _data16.lsb)
  {
    uint32_t setMask = _xset_mask[_data16.msb];
    *_dataPortClr = _dataClrMask;
    *_dataPortSet = setMask;
    while (len--)
    {
      *_wrPortClr = _wrPinMask;
      *_wrPortSet = _wrPinMask;
      *_wrPortClr = _wrPinMask;
      *_wrPortSet = _wrPinMask;
    }
  }
  else
  {
    uint32_t hiMask = _xset_mask[_data16.msb];
    uint32_t loMask = _xset_mask[_data16.lsb];
    while (len--)
    {
      *_dataPortClr = _dataClrMask;
      *_dataPortSet = hiMask;

      *_dataPortClr = _dataClrMask;
      *_dataPortSet = loMask;
    }
  }
}

void Arduino_ESP32PAR8QQQ::writePixels(uint16_t *data, uint32_t len)
{
  while (len--)
  {
    _data16.value = *data++;
    WRITE(_data16.msb);
    WRITE(_data16.lsb);
  }
}

void Arduino_ESP32PAR8QQQ::writeC8D8(uint8_t c, uint8_t d)
{
  DC_LOW();

  WRITE(c);

  DC_HIGH();

  WRITE(d);
}

void Arduino_ESP32PAR8QQQ::writeC8D16(uint8_t c, uint16_t d)
{
  DC_LOW();

  WRITE(c);

  DC_HIGH();

  _data16.value = d;
  WRITE(_data16.msb);
  WRITE(_data16.lsb);
}

void Arduino_ESP32PAR8QQQ::writeC8D16D16(uint8_t c, uint16_t d1, uint16_t d2)
{
  DC_LOW();

  WRITE(c);

  DC_HIGH();

  _data16.value = d1;
  WRITE(_data16.msb);
  WRITE(_data16.lsb);

  _data16.value = d2;
  WRITE(_data16.msb);
  WRITE(_data16.lsb);
}

void Arduino_ESP32PAR8QQQ::writeC8D16D16Split(uint8_t c, uint16_t d1, uint16_t d2)
{
  DC_LOW();

  WRITE(c);

  DC_HIGH();

  _data16.value = d1;
  WRITE(_data16.msb);
  WRITE(_data16.lsb);

  _data16.value = d2;
  WRITE(_data16.msb);
  WRITE(_data16.lsb);
}

void Arduino_ESP32PAR8QQQ::writeBytes(uint8_t *data, uint32_t len)
{
  while (len--)
  {
    WRITE(*data++);
  }
}

void Arduino_ESP32PAR8QQQ::writeIndexedPixels(uint8_t *data, uint16_t *idx, uint32_t len)
{
  while (len--)
  {
    _data16.value = idx[*data++];
    WRITE(_data16.msb);
    WRITE(_data16.lsb);
  }
}

void Arduino_ESP32PAR8QQQ::writeIndexedPixelsDouble(uint8_t *data, uint16_t *idx, uint32_t len)
{
  while (len--)
  {
    _data16.value = idx[*data++];
    WRITE(_data16.msb);
    WRITE(_data16.lsb);
    WRITE(_data16.msb);
    WRITE(_data16.lsb);
  }
}

INLINE void Arduino_ESP32PAR8QQQ::WRITE(uint8_t d)
{
  uint32_t setMask = _xset_mask[d];
  *_dataPortClr = _dataClrMask;
  *_dataPortSet = setMask;
}

/******** low level bit twiddling **********/

INLINE void Arduino_ESP32PAR8QQQ::DC_HIGH(void)
{
  *_dcPortSet = _dcPinMask;
}

INLINE void Arduino_ESP32PAR8QQQ::DC_LOW(void)
{
  *_dcPortClr = _dcPinMask;
}

INLINE void Arduino_ESP32PAR8QQQ::CS_HIGH(void)
{
  if (_cs != GFX_NOT_DEFINED)
  {
    *_csPortSet = _csPinMask;
  }
}

INLINE void Arduino_ESP32PAR8QQQ::CS_LOW(void)
{
  if (_cs != GFX_NOT_DEFINED)
  {
    *_csPortClr = _csPinMask;
  }
}

#endif // #if defined(ESP32) && (CONFIG_IDF_TARGET_ESP32 || CONFIG_IDF_TARGET_ESP32S2 || CONFIG_IDF_TARGET_ESP32S3)