NerdNos-Firmware/Lib/TFT_eSPI/TFT_Drivers/RM68120_Rotation.h

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// This is the command sequence that rotates the RM68120 driver coordinate frame
rotation = m % 4; // Limit the range of values to 0-3
writecommand(TFT_MADCTL);
switch (rotation) {
case 0:
writedata(TFT_MAD_COLOR_ORDER);
_width = _init_width;
_height = _init_height;
break;
case 1:
writedata(TFT_MAD_MV | TFT_MAD_MX | TFT_MAD_COLOR_ORDER);
_width = _init_height;
_height = _init_width;
break;
case 2:
writedata(TFT_MAD_MX | TFT_MAD_MY | TFT_MAD_COLOR_ORDER);
_width = _init_width;
_height = _init_height;
break;
case 3:
writedata(TFT_MAD_MV | TFT_MAD_MY | TFT_MAD_COLOR_ORDER);
_width = _init_height;
_height = _init_width;
break;
}