CYD ESP32-2432S028 with different SPI bus for touch

Extensions/Touch.cpp

@@ -53,13 +53,68 @@ inline void TFT_eSPI::end_touch_read_write(void){
 void TFT_eSPI::spi_begin_touch() {begin_touch_read_write();}
 void TFT_eSPI::spi_end_touch()   {  end_touch_read_write();}
 
+/***************************************************************************************
+** Function name:           Sspixfer
+** Description:             software SPI transfer. 
+***************************************************************************************/
+uint16_t SPIdout;
+uint16_t SPIdin;
+
+void Sspixfer (uint16_t dout)    // Exchange 8 bits of data over SPI
+{
+//  uint16_t tmp;                       // Data in
+  uint16_t SPImask = 0x80;              // Set bit mask
+  SPIdout = dout;				        // Set data to go
+  for (uint8_t lpcnt = 0; lpcnt < 8; lpcnt ++)   // Do 8 bits
+  {
+    digitalWrite (TOUCH_MOSI, ((SPIdout & SPImask) ? HIGH:LOW)); // Set up data out
+    SPImask = (SPImask >> 1);           // Mask for next bit
+    digitalWrite(TOUCH_CLK,1);          // CLK = 1
+    // tmp = (tmp << 1);                // Shift existing data along
+    SPIdin = (SPIdin << 1);             // Shift existing data along
+    digitalWrite(TOUCH_CLK,0);          // CLK = 0
+    ets_delay_us(1);                    // Delay
+    // tmp |= digitalRead(TOUCH_MISO);  // Shift data in
+    SPIdin |= digitalRead(TOUCH_MISO);  // Shift data in
+  }                                     // Go round again
+}                                       // All done
+
 /***************************************************************************************
 ** Function name:           getTouchRaw
 ** Description:             read raw touch position.  Always returns true.
 ***************************************************************************************/
 uint8_t TFT_eSPI::getTouchRaw(uint16_t *x, uint16_t *y){
   uint16_t tmp;
 
+#ifdef SOFTSPI
+
+  digitalWrite(TOUCH_CS,0); 
+  Sspixfer(0xD0);            // Start new YP conversion
+  Sspixfer(0);               // Read first 8 bits
+  Sspixfer(0xD0);            // Read last 8 bits and start new YP conversion
+  Sspixfer(0);               // Read first 8 bits
+  Sspixfer(0xD0);            // Read last 8 bits and start new YP conversion
+  Sspixfer(0);               // Read first 8 bits
+  Sspixfer(0xD0);            // Read last 8 bits and start new YP conversion
+  Sspixfer(0);               // Read first 8 bits
+  Sspixfer(0x90);            // Read last 8 bits and start new XP conversion
+
+  *x  = SPIdin >>4;          // Transfer and re-align data  
+
+  Sspixfer(0);               // Read first 8 bits
+  Sspixfer(0x90);            // Read last 8 bits and start new XP conversion
+  Sspixfer(0);               // Read first 8 bits
+  Sspixfer(0x90);            // Read last 8 bits and start new XP conversion
+  Sspixfer(0);               // Read first 8 bits
+  Sspixfer(0x90);            // Read last 8 bits and start new XP conversion
+  Sspixfer(0);               // Read first 8 bits
+  Sspixfer(0);               // Read last 8 bits
+
+  *y  = SPIdin >>4;          // Transfer and re-align data 
+  digitalWrite(TOUCH_CS,1);
+
+#else
+
   begin_touch_read_write();
 
   // Start YP sample request for x position, read 4 times and keep last sample
@@ -93,6 +148,8 @@ uint8_t TFT_eSPI::getTouchRaw(uint16_t *x, uint16_t *y){
 
   end_touch_read_write();
 
+#endif
+
   return true;
 }
 
@@ -101,16 +158,38 @@ uint8_t TFT_eSPI::getTouchRaw(uint16_t *x, uint16_t *y){
 ** Description:             read raw pressure on touchpad and return Z value. 
 ***************************************************************************************/
 uint16_t TFT_eSPI::getTouchRawZ(void){
+#if defined SOFTSPI
+
+  int16_t tz = 0xFFF;
+
+  digitalWrite(TOUCH_CS,0); 
+  Sspixfer(0xb0);            // Start new Z1 conversion
+  Sspixfer(0);               // Read first 8 bits
+  Sspixfer(0xc0);            // Read last 8 bits and start Z2 conversion
+  tz += (SPIdin >>4);
+
+  Sspixfer(0);               // Read first 8 bits
+  Sspixfer(0);               // Read last 8 bits
+  tz -= (SPIdin >>4);
+
+  digitalWrite(TOUCH_CS,1); 
+
+//  tz += Sspixfer16(0xc0) >> 3;  // Read Z1 and start Z2 conversion
+//  tz -= Sspixfer16(0x00) >> 3;  // Read Z2
+
+#else
 
   begin_touch_read_write();
 
   // Z sample request
   int16_t tz = 0xFFF;
+
   spi.transfer(0xb0);               // Start new Z1 conversion
   tz += spi.transfer16(0xc0) >> 3;  // Read Z1 and start Z2 conversion
   tz -= spi.transfer16(0x00) >> 3;  // Read Z2
 
   end_touch_read_write();
+#endif
 
   if (tz == 4095) tz = 0;
 

README.md

@@ -1,3 +1,6 @@
+CYD version now in: User_Setups\Setup303_CYD_ESP32-2432S028R.h 
+SoftSPI applied as found @ https://forum.arduino.cc/t/esp32-2432s028r-all-in-one-display-touch-spi-problems/1059746/20
+
 A ["Discussions"](https://github.com/Bodmer/TFT_eSPI/discussions) facility has been added for Q&A etc. Use the ["Issues"](https://github.com/Bodmer/TFT_eSPI/issues) tab only for problems with the library. Thanks!
 # News
 1. The Create_font Processing sketch has been updated to automatically create a complete C header file. The automatic opening of the font folder can also be disabled within the Processing sketch. (Thanks to Pierre-Loup Martin).

TFT_eSPI.cpp

@@ -533,10 +533,16 @@ TFT_eSPI::TFT_eSPI(int16_t w, int16_t h)
 void TFT_eSPI::initBus(void) {
 
 #ifdef TFT_CS
-  if (TFT_CS >= 0) {
-    pinMode(TFT_CS, OUTPUT);
-    digitalWrite(TFT_CS, HIGH); // Chip select high (inactive)
-  }
+  #if defined SOFTSPI 				// CYD changes
+    pinMode(TOUCH_MOSI, OUTPUT);	// CYD changes
+    pinMode(TOUCH_MISO, INPUT);		// CYD changes
+    pinMode(TOUCH_CLK, OUTPUT);		// CYD changes
+  #else 							// CYD changes
+    if (TFT_CS >= 0) {
+      pinMode(TFT_CS, OUTPUT);
+      digitalWrite(TFT_CS, HIGH); // Chip select high (inactive)
+    }
+  #endif 							// CYD changes
 #endif
 
 // Configure chip select for touchscreen controller if present

User_Setups/Setup303_CYD_ESP32-2432S028R.h

@@ -0,0 +1,35 @@
+// See SetupX_Template.h for all options available
+#define USER_SETUP_ID 303
+
+#define ILI9341_2_DRIVER
+
+#define TFT_BL           21
+#define TFT_BACKLIGHT_ON HIGH
+#define TFT_MOSI         13
+#define TFT_SCLK         14
+#define TFT_CS           15
+#define TFT_DC            2
+#define TFT_RST          -1
+
+#define SOFTSPI		  // Uncomment for software SPI
+#define TOUCH_CS   33 // Chip select pin (T_CS) of touch screen
+#define TOUCH_MOSI 32 // Separate Touch SoftSPI bus
+#define TOUCH_MISO 39 // Separate Touch SoftSPI bus
+#define TOUCH_CLK  25 // Separate Touch SoftSPI bus
+
+#define LOAD_GLCD   // Font 1. Original Adafruit 8 pixel font needs ~1820 bytes in FLASH
+#define LOAD_FONT2  // Font 2. Small 16 pixel high font, needs ~3534 bytes in FLASH, 96 characters
+#define LOAD_FONT4  // Font 4. Medium 26 pixel high font, needs ~5848 bytes in FLASH, 96 characters
+#define LOAD_FONT6  // Font 6. Large 48 pixel font, needs ~2666 bytes in FLASH, only characters 1234567890:-.apm
+#define LOAD_FONT7  // Font 7. 7 segment 48 pixel font, needs ~2438 bytes in FLASH, only characters 1234567890:-.
+#define LOAD_FONT8  // Font 8. Large 75 pixel font needs ~3256 bytes in FLASH, only characters 1234567890:-.
+#define LOAD_GFXFF  // FreeFonts. Include access to the 48 Adafruit_GFX free fonts FF1 to FF48 and custom fonts
+#define SMOOTH_FONT
+
+#define SPI_FREQUENCY       40000000
+
+#define SPI_READ_FREQUENCY   1600000
+
+#define SPI_TOUCH_FREQUENCY  2500000
+
+// #define SUPPORT_TRANSACTIONS