Add ESP32 S2 support

Tested with ESP32 board package 2.0.1

Additional boards manager URL may need to be updated to load the latest ESP32 board package!

Processors/TFT_eSPI_ESP32.c

@@ -8,21 +8,38 @@
 
 // Select the SPI port to use, ESP32 has 2 options
 #if !defined (TFT_PARALLEL_8_BIT)
-  #ifdef USE_HSPI_PORT
-    SPIClass spi = SPIClass(HSPI);
-  #else // use default VSPI port
-    //SPIClass& spi = SPI;
-    SPIClass spi = SPIClass(VSPI);
+  #ifdef CONFIG_IDF_TARGET_ESP32
+    #ifdef USE_HSPI_PORT
+      SPIClass spi = SPIClass(HSPI);
+    #else // use default VSPI port
+      //SPIClass& spi = SPI;
+      SPIClass spi = SPIClass(VSPI);
+    #endif
+  #else
+    #ifdef USE_HSPI_PORT
+      SPIClass spi = SPIClass(HSPI);
+    #else // use FSPI port
+      //SPIClass& spi = SPI;
+      SPIClass spi = SPIClass(FSPI);
+    #endif
   #endif
 #endif
 
 #ifdef ESP32_DMA
   // DMA SPA handle
   spi_device_handle_t dmaHAL;
-  #ifdef USE_HSPI_PORT
-    spi_host_device_t spi_host = HSPI_HOST;
+  #ifdef CONFIG_IDF_TARGET_ESP32
+    #ifdef USE_HSPI_PORT
+      spi_host_device_t spi_host = HSPI_HOST;
+    #else // use VSPI port
+      spi_host_device_t spi_host = VSPI_HOST;
+    #endif
   #else
-    spi_host_device_t spi_host = VSPI_HOST;
+    #ifdef USE_HSPI_PORT
+      spi_host_device_t spi_host = (spi_host_device_t)1; // 1 scrambles display area!
+    #else // use FSPI port
+      spi_host_device_t spi_host = (spi_host_device_t)1; // 1 draws once then freezes
+    #endif
   #endif
 #endif
 

Processors/TFT_eSPI_ESP32.h

@@ -17,11 +17,37 @@
   #define SUPPORT_TRANSACTIONS
 #endif
 
+/*
+ESP32:
+FSPI not defined
+HSPI = 2, uses SPI2
+VSPI = 3, uses SPI3
+
+ESP32-S2:
+FSPI = 1, uses SPI2
+HSPI = 2, uses SPI3
+VSPI not defined
+
+ESP32 C3:
+FSPI = 0, uses SPI2 ???? To be checked
+HSPI = 1, uses SPI3 ???? To be checked
+VSPI not defined
+
+For ESP32/S2/C3:
+SPI1_HOST = 0
+SPI2_HOST = 1
+SPI3_HOST = 2
+*/
+
 // ESP32 specific SPI port selection
 #ifdef USE_HSPI_PORT
-  #define SPI_PORT HSPI
+  #ifdef CONFIG_IDF_TARGET_ESP32
+    #define SPI_PORT HSPI  //HSPI is port 2 on ESP32
+  #else
+    #define SPI_PORT 3     //HSPI is port 3 on ESP32 S2
+  #endif
 #else
-  #define SPI_PORT VSPI
+  #define SPI_PORT 2 //FSPI(ESP32 S2) or VSPI (ESP32)
 #endif
 
 #ifdef RPI_DISPLAY_TYPE