Fix RP2040 with RPi type display

RPi display requires 16 bit commands and slower DC and CS strobe timings.

Processors/TFT_eSPI_RP2040.h

@@ -59,9 +59,14 @@
 #else
   //#define DC_C sio_hw->gpio_clr = (1ul << TFT_DC)
   //#define DC_D sio_hw->gpio_set = (1ul << TFT_DC)
+  #if  defined (RPI_DISPLAY_TYPE)
+    #define DC_C digitalWrite(TFT_DC, LOW);
+    #define DC_D digitalWrite(TFT_DC, HIGH);
+  #else
     #define DC_C sio_hw->gpio_clr = (1ul << TFT_DC)
     #define DC_D sio_hw->gpio_set = (1ul << TFT_DC)
   #endif
+#endif
 
 ////////////////////////////////////////////////////////////////////////////////////////
 // Define the CS (TFT chip select) pin drive code
@@ -69,10 +74,15 @@
 #ifndef TFT_CS
   #define CS_L // No macro allocated so it generates no code
   #define CS_H // No macro allocated so it generates no code
+#else
+  #if  defined (RPI_DISPLAY_TYPE)
+    #define CS_L digitalWrite(TFT_CS, LOW);
+    #define CS_H digitalWrite(TFT_CS, HIGH);
   #else
     #define CS_L sio_hw->gpio_clr = (1ul << TFT_CS)
     #define CS_H sio_hw->gpio_set = (1ul << TFT_CS)
   #endif
+#endif
 
 ////////////////////////////////////////////////////////////////////////////////////////
 // Make sure TFT_RD is defined if not used to avoid an error message

TFT_eSPI.cpp

@@ -3093,8 +3093,12 @@ void TFT_eSPI::setWindow(int32_t x0, int32_t y0, int32_t x1, int32_t y1)
     while (spi_get_hw(spi0)->sr & SPI_SSPSR_BSY_BITS) {};
     DC_C;
     #if !defined (SPI_18BIT_DRIVER)
+      #if  defined (RPI_DISPLAY_TYPE) // RPi TFT type always needs 16 bit transfers
+      	spi_set_format(spi0,  16, (spi_cpol_t)0, (spi_cpha_t)0, SPI_MSB_FIRST);
+      #else
         spi_set_format(spi0,  8, (spi_cpol_t)0, (spi_cpha_t)0, SPI_MSB_FIRST);
       #endif
+    #endif
     spi_get_hw(spi0)->dr = (uint32_t)TFT_CASET;
 
     while (spi_get_hw(spi0)->sr & SPI_SSPSR_BSY_BITS) {};
@@ -3282,7 +3286,11 @@ void TFT_eSPI::drawPixel(int32_t x, int32_t y, uint32_t color)
   // a busy check is not needed.
   while (spi_get_hw(spi0)->sr & SPI_SSPSR_BSY_BITS) {};
   DC_C;
+  #if  defined (RPI_DISPLAY_TYPE) // RPi TFT type always needs 16 bit transfers
+   	spi_set_format(spi0,  16, (spi_cpol_t)0, (spi_cpha_t)0, SPI_MSB_FIRST);
+  #else
     spi_set_format(spi0,  8, (spi_cpol_t)0, (spi_cpha_t)0, SPI_MSB_FIRST);
+  #endif
   spi_get_hw(spi0)->dr = (uint32_t)TFT_CASET;
 
   while (spi_get_hw(spi0)->sr & SPI_SSPSR_BSY_BITS){};
@@ -3317,9 +3325,13 @@ void TFT_eSPI::drawPixel(int32_t x, int32_t y, uint32_t color)
   #else
     while (spi_get_hw(spi0)->sr & SPI_SSPSR_BSY_BITS) {};
     DC_D;
+    #if  defined (RPI_DISPLAY_TYPE) // RPi TFT type always needs 16 bit transfers
+      spi_get_hw(spi0)->dr = (uint32_t)color;
+    #else
       spi_get_hw(spi0)->dr = (uint32_t)color>>8;
       spi_get_hw(spi0)->dr = (uint32_t)color;
     #endif
+  #endif
 /*
   // Subsequent pixel reads work OK without draining the FIFO...
   // Drain RX FIFO, then wait for shifting to finish (which may be *after*

TFT_eSPI.h

@@ -16,7 +16,7 @@
 #ifndef _TFT_eSPIH_
 #define _TFT_eSPIH_
 
-#define TFT_ESPI_VERSION "2.3.72"
+#define TFT_ESPI_VERSION "2.3.73"
 
 // Bit level feature flags
 // Bit 0 set: viewport capability

library.json

@@ -1,6 +1,6 @@
 {
   "name": "TFT_eSPI",
-  "version": "2.3.72",
+  "version": "2.3.73",
   "keywords": "Arduino, tft, ePaper, display, Pico, RP2040, STM32, ESP8266, NodeMCU, ESP32, M5Stack, ILI9341, ST7735, ILI9163, S6D02A1, ILI9481, ILI9486, ILI9488, ST7789, RM68140, SSD1351, SSD1963, ILI9225, HX8357D",
   "description": "A TFT and ePaper SPI graphics library with optimisation for Raspberry Pi Pico, ESP8266, ESP32 and STM32",
   "repository":

library.properties

@@ -1,5 +1,5 @@
 name=TFT_eSPI
-version=2.3.72
+version=2.3.73
 author=Bodmer
 maintainer=Bodmer
 sentence=TFT graphics library for Arduino processors with performance optimisation for RP2040, STM32, ESP8266 and ESP32