Dual SPI Display Support?

[jlt206]

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Attempting to use Dual_display_SPI.ino with ST7789 displays.

Is there Dual Screen Support for this Library?

[samo-sk]

The problem seems to be that you call Adafruit_ST7789 with two parameters, but there is no such constructor. Adafruit_ST7789.h declares constructors with only 5 (one with a default value), 3 and 4 parameters.

[jlt206]

That's what I understand.

Whatv I have had to do is to manually edit the .cpp file, which ofcourse gets wiped out every time there is an update.

Bodmers Librbaries, use a command called Viewport() to achieve this with the same display driver, so it must be possible some how?

It is certainly a very usefull tool!

/**************************************************************************/
/*!
    @brief  Set origin of (0,0) and orientation of TFT display
    @param  m  The index for rotation, from 0-3 inclusive
*/
/**************************************************************************/
void Adafruit_ST7789::setRotation(uint8_t m) {
  uint8_t madctl = 0;

  rotation = m & 3; // can't be higher than 3

  switch (rotation) {
  case 0:
    madctl = ST77XX_MADCTL_MX | ST77XX_MADCTL_MY | ST77XX_MADCTL_RGB;
    _xstart = _colstart;
    _ystart = _rowstart - 40;
    _width = windowWidth;
    _height = windowHeight;
    break;
  case 1:
    madctl = ST77XX_MADCTL_MY | ST77XX_MADCTL_MV | ST77XX_MADCTL_RGB;
    _xstart = _rowstart;
    _ystart = _colstart2;
    _height = windowWidth;
    _width = windowHeight;
    break;
  case 2:
    madctl = ST77XX_MADCTL_RGB;
    _xstart = _colstart2;
    _ystart = _rowstart2 + 40;
    _width = windowWidth;
    _height = windowHeight;
    break;
  case 3:
    madctl = ST77XX_MADCTL_MX | ST77XX_MADCTL_MV | ST77XX_MADCTL_RGB;
    _xstart = _rowstart2;
    _ystart = _colstart;
    _height = windowWidth;
    _width = windowHeight;
    break;
  }

  sendCommand(ST77XX_MADCTL, &madctl, 1);