Alfawise Flash EEPROM, Z Servo Probe (#14877)

Marlin/src/pins/stm32/pins_LONGER3D_LK.h

 #define LED_PIN            PC2   // pin 17
 
 //
-// PWM
+// PWM for a servo probe
+// Other servo devices are not supported on this board!
 //
-#define SERVO0_PIN         PD13  // Open drain PWM pin on the V0G (GND or floating 5V)
-#define SERVO0_PWM_OD            // Comment this if using PE5
+#if HAS_Z_SERVO_PROBE
+  #define SERVO0_PIN       PD13  // Open drain PWM pin on the V0G (GND or floating 5V)
+  #define SERVO0_PWM_OD          // Comment this if using PE5
 
-//#define SERVO0_PIN       PE5   // Pulled up PWM pin on the V08 (3.3V or 0)
+  //#define SERVO0_PIN     PE5   // Pulled up PWM pin on the V08 (3.3V or 0)
+  //#undef Z_MAX_PIN             // Uncomment if using ZMAX connector (PE5)
+#endif
 
 /**
  * Note: Alfawise screens use various TFT controllers. Supported screens
 #endif
 
 //
-// SPI1 (EEPROM W25Q64 + DAC OUT)
+// Persistent Storage
+// If no option is selected below the SD Card will be used
 //
+//#define SPI_EEPROM
+#define FLASH_EEPROM_EMULATION
+
 #undef E2END
-#define E2END              0x7FF // EEPROM end address (reserve 2kB on sd/sram, real spi one is 8MB/64Mbits)
-/*
-#define SPI_EEPROM         1   // If commented this will create a file on the SD card as a replacement
-#define SPI_CHAN_EEPROM1   1
-#define SPI_EEPROM1_CS     PC5 // pin 34
-
-//#define EEPROM_SCK  BOARD_SPI1_SCK_PIN   // PA5 pin 30
-//#define EEPROM_MISO BOARD_SPI1_MISO_PIN  // PA6 pin 31
-//#define EEPROM_MOSI BOARD_SPI1_MOSI_PIN  // PA7 pin 32
-*/
+#if ENABLED(SPI_EEPROM)
+  // SPI1 EEPROM Winbond W25Q64 (8MB/64Mbits)
+  #define SPI_CHAN_EEPROM1   1
+  #define SPI_EEPROM1_CS     PC5   // pin 34
+  #define EEPROM_SCK  BOARD_SPI1_SCK_PIN    // PA5 pin 30
+  #define EEPROM_MISO BOARD_SPI1_MISO_PIN   // PA6 pin 31
+  #define EEPROM_MOSI BOARD_SPI1_MOSI_PIN   // PA7 pin 32
+  #define EEPROM_PAGE_SIZE   0x1000U        // 4KB (from datasheet)
+  #define E2END ((16 * EEPROM_PAGE_SIZE)-1) // Limit to 64KB for now...
+#elif ENABLED(FLASH_EEPROM_EMULATION)
+  // SoC Flash (framework-arduinoststm32-maple/STM32F1/libraries/EEPROM/EEPROM.h)
+  #define EEPROM_START_ADDRESS (0x8000000UL + (512 * 1024) - 2 * EEPROM_PAGE_SIZE)
+  #define EEPROM_PAGE_SIZE     (0x800U)     // 2KB, but will use 2x more (4KB)
+  #define E2END (EEPROM_PAGE_SIZE - 1)
+#else
+  #define E2END (0x7FFU) // On SD, Limit to 2KB, require this amount of RAM
+#endif

config/examples/Alfawise/U20/Configuration.h

 #if ENABLED(LEVEL_BED_CORNERS)
   #define LEVEL_CORNERS_INSET 30    // (mm) An inset for corner leveling
   #define LEVEL_CORNERS_Z_HOP  4.0  // (mm) Move nozzle up before moving between corners
-  #define LEVEL_CORNERS_HEIGHT 0.0  // (mm) Z height of nozzle at leveling points
-  #define LEVEL_CENTER_TOO        // Move to the center after the last corner
+  #define LEVEL_CORNERS_HEIGHT 0.2  // (mm) Z height of nozzle at leveling points
+  #define LEVEL_CENTER_TOO          // Move to the center after the last corner
 #endif
 
 /**
 #endif
 
 // Homing speeds (mm/m)
-#define HOMING_FEEDRATE_XY (20*60)
+#define HOMING_FEEDRATE_XY (40*60)
 #define HOMING_FEEDRATE_Z  (7*60)
 
 // Validate that endstops are triggered on homing moves
 
   #if ENABLED(TS_V11)
     // Alfawise U20 ILI9341 2.8 TP Ver 1.1 / Green PCB on the back of touchscreen
-    #define XPT2046_X_CALIBRATION 11605
-    #define XPT2046_Y_CALIBRATION 9091
-    #define XPT2046_X_OFFSET -24
-    #define XPT2046_Y_OFFSET -17
+    #define XPT2046_X_CALIBRATION   11605
+    #define XPT2046_Y_CALIBRATION   9091
+    #define XPT2046_X_OFFSET       -24
+    #define XPT2046_Y_OFFSET       -17
   #endif
 
   #if ENABLED(TS_V12)

config/examples/Alfawise/U20/Configuration_adv.h

 #define X_HOME_BUMP_MM 5
 #define Y_HOME_BUMP_MM 5
 #define Z_HOME_BUMP_MM 2
-#define HOMING_BUMP_DIVISOR { 2, 2, 4 }  // Re-Bump Speed Divisor (Divides the Homing Feedrate)
+#define HOMING_BUMP_DIVISOR { 4, 4, 4 }  // Re-Bump Speed Divisor (Divides the Homing Feedrate)
 //#define QUICK_HOME                     // If homing includes X and Y, do a diagonal move initially
 //#define HOMING_BACKOFF_MM { 2, 2, 2 }  // (mm) Move away from the endstops after homing
 
 
 #if EITHER(ULTIPANEL, EXTENSIBLE_UI)
   #define MANUAL_FEEDRATE { 50*60, 50*60, 4*60, 60 } // Feedrates for manual moves along X, Y, Z, E from panel
+  #define SHORT_MANUAL_Z_MOVE 0.025 // (mm) Smallest manual Z move (< 0.1mm)
   #if ENABLED(ULTIPANEL)
     #define MANUAL_E_MOVES_RELATIVE // Display extruder move distance rather than "position"
     #define ULTIPANEL_FEEDMULTIPLY  // Encoder sets the feedrate multiplier on the Status Screen