add ST77916 display support

Author: moononournation

src/Arduino_GFX_Library.h

@@ -88,6 +88,7 @@
 #include "display/Arduino_SSD1351.h"
 #include "display/Arduino_ST7735.h"
 #include "display/Arduino_ST7789.h"
+#include "display/Arduino_ST77916.h"
 #include "display/Arduino_ST7796.h"
 #include "display/Arduino_WEA2012.h"
 

src/display/Arduino_ST77916.cpp

@@ -0,0 +1,107 @@
+#include "Arduino_ST77916.h"
+
+Arduino_ST77916::Arduino_ST77916(
+    Arduino_DataBus *bus, int8_t rst, uint8_t r,
+    bool ips, int16_t w, int16_t h,
+    uint8_t col_offset1, uint8_t row_offset1, uint8_t col_offset2, uint8_t row_offset2)
+    : Arduino_TFT(bus, rst, r, ips, w, h, col_offset1, row_offset1, col_offset2, row_offset2)
+{
+}
+
+bool Arduino_ST77916::begin(int32_t speed)
+{
+  return Arduino_TFT::begin(speed);
+}
+
+/**************************************************************************/
+/*!
+    @brief   Set origin of (0,0) and orientation of TFT display
+    @param   m  The index for rotation, from 0-3 inclusive
+*/
+/**************************************************************************/
+void Arduino_ST77916::setRotation(uint8_t r)
+{
+  Arduino_TFT::setRotation(r);
+  switch (_rotation)
+  {
+  case 1:
+    r = ST77916_MADCTL_MX | ST77916_MADCTL_MV | ST77916_MADCTL_RGB;
+    break;
+  case 2:
+    r = ST77916_MADCTL_MX | ST77916_MADCTL_MY | ST77916_MADCTL_RGB;
+    break;
+  case 3:
+    r = ST77916_MADCTL_MY | ST77916_MADCTL_MV | ST77916_MADCTL_RGB;
+    break;
+  default: // case 0:
+    r = ST77916_MADCTL_RGB;
+    break;
+  }
+  _bus->beginWrite();
+  _bus->writeC8D8(ST77916_MADCTL, r);
+  _bus->endWrite();
+}
+
+void Arduino_ST77916::writeAddrWindow(int16_t x, int16_t y, uint16_t w, uint16_t h)
+{
+  if ((x != _currentX) || (w != _currentW))
+  {
+    _currentX = x;
+    _currentW = w;
+    x += _xStart;
+    _bus->writeC8D16D16(ST77916_CASET, x, x + w - 1);
+  }
+
+  if ((y != _currentY) || (h != _currentH))
+  {
+    _currentY = y;
+    _currentH = h;
+    y += _yStart;
+    _bus->writeC8D16D16(ST77916_RASET, y, y + h - 1);
+  }
+
+  _bus->writeCommand(ST77916_RAMWR); // write to RAM
+}
+
+void Arduino_ST77916::invertDisplay(bool i)
+{
+  _bus->sendCommand((_ips ^ i) ? ST77916_INVON : ST77916_INVOFF);
+}
+
+void Arduino_ST77916::displayOn(void)
+{
+  _bus->sendCommand(ST77916_SLPOUT);
+  delay(ST77916_SLPOUT_DELAY);
+}
+
+void Arduino_ST77916::displayOff(void)
+{
+  _bus->sendCommand(ST77916_SLPIN);
+  delay(ST77916_SLPIN_DELAY);
+}
+
+// Companion code to the above tables.  Reads and issues
+// a series of LCD commands stored in PROGMEM byte array.
+void Arduino_ST77916::tftInit()
+{
+  if (_rst != GFX_NOT_DEFINED)
+  {
+    pinMode(_rst, OUTPUT);
+    digitalWrite(_rst, HIGH);
+    delay(100);
+    digitalWrite(_rst, LOW);
+    delay(ST77916_RST_DELAY);
+    digitalWrite(_rst, HIGH);
+    delay(ST77916_RST_DELAY);
+  }
+  else
+  {
+    // Software Rest
+    _bus->sendCommand(ST77916_SWRESET);
+    delay(ST77916_RST_DELAY);
+  }
+
+  _bus->batchOperation(st77916_init_operations, sizeof(st77916_init_operations));
+
+  invertDisplay(false);
+}