Update ILI9486 driver for SPI

Processors/TFT_eSPI_ESP32.c

@@ -173,7 +173,7 @@ void TFT_eSPI::pushPixels(const void* data_in, uint32_t len)
 }
 
 ////////////////////////////////////////////////////////////////////////////////////////
-#elif !defined (ILI9481_DRIVER) && !defined (ILI9488_DRIVER) && !defined (TFT_PARALLEL_8_BIT) // Most displays
+#elif !defined (SPI_18BIT_DRIVER) && !defined (TFT_PARALLEL_8_BIT) // Most SPI displays
 ////////////////////////////////////////////////////////////////////////////////////////
 
 /***************************************************************************************
@@ -349,7 +349,7 @@ void TFT_eSPI::pushPixels(const void* data_in, uint32_t len){
 }
 
 ////////////////////////////////////////////////////////////////////////////////////////
-#elif (defined (ILI9481_DRIVER) || defined (ILI9488_DRIVER)) && !defined (TFT_PARALLEL_8_BIT)// Now code for ILI9481/8
+#elif defined (SPI_18BIT_DRIVER) // SPI 18 bit colour
 ////////////////////////////////////////////////////////////////////////////////////////
 
 /***************************************************************************************

Processors/TFT_eSPI_ESP32.h

@@ -52,7 +52,7 @@
 #endif
 
 // Code to check if DMA is busy, used by SPI bus transaction transaction and endWrite functions
-#if !defined(TFT_PARALLEL_8_BIT) && !defined(ILI9481_DRIVER)  && !defined(ILI9488_DRIVER) && !defined (RPI_DISPLAY_TYPE) || (defined (RPI_DISPLAY_TYPE) && defined (ST7796_DRIVER))
+#if !defined(TFT_PARALLEL_8_BIT) && !defined(SPI_18BIT_DRIVER)  && !defined (RPI_DISPLAY_TYPE) || (defined (RPI_DISPLAY_TYPE) && defined (ST7796_DRIVER))
   #define ESP32_DMA
   // Code to check if DMA is busy, used by SPI DMA + transaction + endWrite functions
   #define DMA_BUSY_CHECK  dmaWait()
@@ -349,9 +349,9 @@
   #endif
 
 ////////////////////////////////////////////////////////////////////////////////////////
-// Macros to write commands/pixel colour data to an ILI9488 TFT
+// Macros to write commands/pixel colour data to a SPI ILI948x TFT
 ////////////////////////////////////////////////////////////////////////////////////////
-#elif  defined (ILI9481_DRIVER) || defined (ILI9488_DRIVER)// 16 bit colour converted to 3 bytes for 18 bit RGB
+#elif  defined (SPI_18BIT_DRIVER) // SPI 18 bit colour
 
   // Write 8 bits to TFT
   #define tft_Write_8(C)   spi.transfer(C)

Processors/TFT_eSPI_ESP8266.c

@@ -109,7 +109,7 @@ void TFT_eSPI::pushSwapBytePixels(const void* data_in, uint32_t len){
 }
 
 ////////////////////////////////////////////////////////////////////////////////////////
-#elif defined (ILI9481_DRIVER) || defined (ILI9488_DRIVER)
+#elif defined (SPI_18BIT_DRIVER) // SPI 18 bit colour
 ////////////////////////////////////////////////////////////////////////////////////////
 
 /***************************************************************************************

Processors/TFT_eSPI_ESP8266.h

@@ -115,9 +115,9 @@
 #endif
 
 ////////////////////////////////////////////////////////////////////////////////////////
-// Macros to write commands/pixel colour data to an ILI9488 TFT
+// Macros to write commands/pixel colour data to a SPI ILI948x TFT
 ////////////////////////////////////////////////////////////////////////////////////////
-#if  defined (ILI9481_DRIVER) || defined (ILI9488_DRIVER) // 16 bit colour converted to 3 bytes for 18 bit RGB
+#if  defined (SPI_18BIT_DRIVER) // SPI 18 bit colour
 
   // Write 8 bits to TFT
   #define tft_Write_8(C)   spi.transfer(C)

Processors/TFT_eSPI_Generic.c

@@ -168,7 +168,7 @@ void TFT_eSPI::pushPixels(const void* data_in, uint32_t len)
 }
 
 ////////////////////////////////////////////////////////////////////////////////////////
-#elif defined (ILI9481_DRIVER) || defined (ILI9488_DRIVER) // For 24 bit SPI colour TFT                             
+#elif defined (SPI_18BIT_DRIVER) // SPI 18 bit colour                         
 ////////////////////////////////////////////////////////////////////////////////////////
 
 /***************************************************************************************

Processors/TFT_eSPI_Generic.h

@@ -92,9 +92,9 @@
 #endif
 
 ////////////////////////////////////////////////////////////////////////////////////////
-// Macros to write commands/pixel colour data to an ILI9488 TFT
+// Macros to write commands/pixel colour data to a SPI ILI948x TFT
 ////////////////////////////////////////////////////////////////////////////////////////
-#if  defined (ILI9481_DRIVER) || defined (ILI9488_DRIVER) // 16 bit colour converted to 3 bytes for 18 bit RGB
+#if  defined (SPI_18BIT_DRIVER) // SPI 18 bit colour
 
   // Write 8 bits to TFT
   #define tft_Write_8(C)   spi.transfer(C)

Processors/TFT_eSPI_STM32.c

@@ -260,7 +260,7 @@ void TFT_eSPI::pushPixels(const void* data_in, uint32_t len)
 }
 
 ////////////////////////////////////////////////////////////////////////////////////////
-#elif defined (ILI9481_DRIVER) || defined (ILI9488_DRIVER) // For 24 bit colour TFT                                 ############# UNTESTED ###################
+#elif defined (SPI_18BIT_DRIVER) // SPI 18 bit colour
 ////////////////////////////////////////////////////////////////////////////////////////
 
 /***************************************************************************************

Processors/TFT_eSPI_STM32.h

@@ -985,9 +985,9 @@
     #endif
   #endif
 ////////////////////////////////////////////////////////////////////////////////////////
-// Macros to write commands/pixel colour data to a SPI ILI9488 TFT
+// Macros to write commands/pixel colour data to a SPI ILI948x TFT
 ////////////////////////////////////////////////////////////////////////////////////////
-#elif  defined (ILI9481_DRIVER) || defined (ILI9488_DRIVER) // 16 bit colour converted to 3 bytes for 18 bit RGB
+#elif  defined (SPI_18BIT_DRIVER) // SPI 18 bit colour
 
   // Write 8 bits to TFT
   #define tft_Write_8(C) \

TFT_Drivers/ILI9486_Init.h

@@ -15,7 +15,11 @@
     delay(120);
 
     writecommand(0x3A);
-    writedata(0x55);
+    #ifdef TFT_PARALLEL_8_BIT
+      writedata(0x55);           // 16 bit colour interface
+    #else
+      writedata(0x66);           // 18 bit colour interface
+    #endif
 
     writecommand(0xC2);
     writedata(0x44);
@@ -60,7 +64,11 @@
     writedata(0x20);
     writedata(0x00);
  
-    writecommand(0x20);                     // display inversion OFF
+    #ifdef TFT_PARALLEL_8_BIT
+      writecommand(TFT_INVOFF);
+    #else
+      writecommand(TFT_INVON);
+    #endif
  
     writecommand(0x36);
     writedata(0x48);

User_Setup_Select.h

@@ -115,6 +115,11 @@
   #endif
 #endif
 
+// Invoke 18 bit colour for selected displays
+#if (defined (ILI9481_DRIVER) || defined (ILI9486_DRIVER) || defined (ILI9488_DRIVER)) && !defined (TFT_PARALLEL_8_BIT)
+  #define SPI_18BIT_DRIVER
+#endif
+
 // Load the right driver definition - do not tinker here !
 #if   defined (ILI9341_DRIVER)
      #include <TFT_Drivers/ILI9341_Defines.h>
@@ -185,7 +190,6 @@
      #define  TFT_DRIVER 0x0000
 #endif
 
-
 // These are the pins for ESP8266 boards
 //      Name   GPIO    NodeMCU      Function
 #define PIN_D0  16  // GPIO16       WAKE