Increase SPI Speed on LPC. Color and Classic UI for MKS SGEN L. (#19945)

Marlin/src/HAL/LPC1768/HAL_SPI.cpp

@@ -357,8 +357,8 @@ void SPIClass::setDataSize(uint32_t ds) {
 void SPIClass::updateSettings() {
   //SSP_DeInit(_currentSetting->spi_d); //todo: need force de init?!
 
-  // divide PCLK by 2 for SSP0
-  CLKPWR_SetPCLKDiv(_currentSetting->spi_d == LPC_SSP0 ? CLKPWR_PCLKSEL_SSP0 : CLKPWR_PCLKSEL_SSP1, CLKPWR_PCLKSEL_CCLK_DIV_2);
+  // Divide PCLK by 2 for SSP0
+  //CLKPWR_SetPCLKDiv(_currentSetting->spi_d == LPC_SSP0 ? CLKPWR_PCLKSEL_SSP0 : CLKPWR_PCLKSEL_SSP1, CLKPWR_PCLKSEL_CCLK_DIV_2);
 
   SSP_CFG_Type HW_SPI_init; // data structure to hold init values
   SSP_ConfigStructInit(&HW_SPI_init);  // set values for SPI mode

Marlin/src/HAL/LPC1768/include/SPI.h

@@ -37,6 +37,7 @@
 #define DATA_SIZE_8BIT SSP_DATABIT_8
 #define DATA_SIZE_16BIT SSP_DATABIT_16
 
+#define SPI_CLOCK_MAX_TFT  30000000UL
 #define SPI_CLOCK_DIV2     8333333 //(SCR:  2)  desired: 8,000,000  actual: 8,333,333  +4.2%  SPI_FULL_SPEED
 #define SPI_CLOCK_DIV4     4166667 //(SCR:  5)  desired: 4,000,000  actual: 4,166,667  +4.2%  SPI_HALF_SPEED
 #define SPI_CLOCK_DIV8     2083333 //(SCR: 11)  desired: 2,000,000  actual: 2,083,333  +4.2%  SPI_QUARTER_SPEED

Marlin/src/HAL/LPC1768/tft/tft_spi.cpp

@@ -89,7 +89,7 @@ void TFT_SPI::Init() {
   #elif TFT_MISO_PIN == BOARD_SPI2_MISO_PIN
     SPIx.setModule(2);
   #endif
-  SPIx.setClock(SPI_CLOCK_MAX);
+  SPIx.setClock(SPI_CLOCK_MAX_TFT);
   SPIx.setBitOrder(MSBFIRST);
   SPIx.setDataMode(SPI_MODE0);
 }
@@ -125,7 +125,7 @@ uint32_t TFT_SPI::ReadID(uint16_t Reg) {
     }
 
     DataTransferEnd();
-    SPIx.setClock(SPI_CLOCK_MAX);
+    SPIx.setClock(SPI_CLOCK_MAX_TFT);
   #endif
 
   return data >> 7;

Marlin/src/pins/lpc1768/pins_MKS_SGEN_L.h

@@ -249,6 +249,59 @@
     #define LCD_PINS_ENABLE                P1_22
     #define LCD_PINS_D4                    P0_17
 
+  #elif HAS_SPI_TFT                               // Config for Classic UI (emulated DOGM) and Color UI
+    #define TFT_CS_PIN                     P1_00
+    #define TFT_A0_PIN                     P1_22
+    #define TFT_DC_PIN                     P1_22
+    #define TFT_MISO_PIN                   P0_08
+    #define TFT_BACKLIGHT_PIN              P0_18
+    #define TFT_RESET_PIN                  P0_16
+
+    #define LCD_USE_DMA_SPI
+
+    #define TOUCH_INT_PIN                  P0_17
+    #define TOUCH_CS_PIN                   P0_15
+    #define TOUCH_BUTTONS_HW_SPI
+    #define TOUCH_BUTTONS_HW_SPI_DEVICE        2
+
+    // Disable any LCD related PINs config
+    #define LCD_PINS_ENABLE                -1
+    #define LCD_PINS_RS                    -1
+
+    // XPT2046 Touch Screen calibration
+    #if ENABLED(TFT_CLASSIC_UI)
+      #ifndef XPT2046_X_CALIBRATION
+        #define XPT2046_X_CALIBRATION     -11386
+      #endif
+      #ifndef XPT2046_Y_CALIBRATION
+        #define XPT2046_Y_CALIBRATION       8684
+      #endif
+      #ifndef XPT2046_X_OFFSET
+        #define XPT2046_X_OFFSET             689
+      #endif
+      #ifndef XPT2046_Y_OFFSET
+        #define XPT2046_Y_OFFSET            -273
+      #endif
+    #elif ENABLED(TFT_COLOR_UI)
+      #ifndef XPT2046_X_CALIBRATION
+        #define XPT2046_X_CALIBRATION     -16741
+      #endif
+      #ifndef XPT2046_Y_CALIBRATION
+        #define XPT2046_Y_CALIBRATION      11258
+      #endif
+      #ifndef XPT2046_X_OFFSET
+        #define XPT2046_X_OFFSET            1024
+      #endif
+      #ifndef XPT2046_Y_OFFSET
+        #define XPT2046_Y_OFFSET            -367
+      #endif
+
+      #define TFT_BUFFER_SIZE               2400
+    #endif
+
+    #define BTN_EN1                        P3_25
+    #define BTN_EN2                        P3_26
+
   #elif IS_TFTGLCD_PANEL
 
     #undef BEEPER_PIN