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Documentation/changelog.md

 ### Version 4.1.4
+* Add support for Piggy Alligator board
 * Add Debug_info. Repetier button info for enabled or disabled, or M111 S2 for enabled and M111 S0 for disabled.
 * Improved Topography Auto Bed Level.
 * Add Dryrun ABL and verbose width command G29 D or G29 V(0-4).

MarlinKimbra/Configuration_adv.h

@@ -269,7 +269,7 @@
 #define MICROSTEP_MODES {16, 16, 16, 16} // X Y Z E - [1,2,4,8,16,32]
 
 // Motor Current setting (Only functional on ALLIGATOR BOARD)
-#define MOTOR_CURRENT {1, 1, 1, 1} // X Y Z E - Values 0 - 2.5 A
+#define MOTOR_CURRENT {1, 1, 1, 1, 1, 1, 1} // X Y Z E0 E1 E2 E3 - Values 0 - 2.5 A
 
 // Motor Current setting (Only functional when motor driver current ref pins are connected to a digital trimpot on supported boards)
 #define DIGIPOT_MOTOR_CURRENT {135,135,135,135,135} // Values 0-255 (RAMBO 135 = ~0.75A, 185 = ~1A)

MarlinKimbra/pins.h

@@ -2488,28 +2488,26 @@
 #define Z_MS1_PIN             44  // PC19
 #define Z_PROBE_PIN           39  // PC7
 
-// E AXIS
+// E0 AXIS
 #define ORIG_E0_STEP_PIN       5  // PC25
 #define ORIG_E0_DIR_PIN        4  // PC26
 #define ORIG_E0_ENABLE_PIN    24  // PA15, motor RESET pin
 #define E0_MS1_PIN            45  // PC18
 
-/*
+// E1 AXIS
 #define ORIG_E1_STEP_PIN      28  // PD3 on piggy
 #define ORIG_E1_DIR_PIN       27  // PD2 on piggy
-#define ORIG_E1_ENABLE_PIN    -1
-#define E1_MS1_PIN            -1
+#define ORIG_E1_ENABLE_PIN    24  // PA15, motor RESET pin
 
+// E2 AXIS
 #define ORIG_E2_STEP_PIN      11 // PD7 on piggy
 #define ORIG_E2_DIR_PIN       29 // PD6 on piggy
-#define ORIG_E2_ENABLE_PIN    -1
-#define E2_MS_PIN             -1
+#define ORIG_E2_ENABLE_PIN    24 // PA15, motor RESET pin
 
+// E3 AXIS
 #define ORIG_E3_STEP_PIN      30 // PD9 on piggy
 #define ORIG_E3_DIR_PIN       12 // PD8 on piggy
-#define ORIG_E3_ENABLE_PIN    -1
-#define E3_MS_PIN             -1
-*/
+#define ORIG_E3_ENABLE_PIN    24 // PA15, motor RESET pin
 
 #define MOTOR_FAULT_PIN       22 // PB26 , motor X-Y-Z-E0 motor FAULT
 
@@ -2525,25 +2523,19 @@
 #define PS_ON_PIN             -1
 #define KILL_PIN              -1
 #define SUICIDE_PIN           -1 //PIN that has to be turned on right after start, to keep power flowing.
-#define HEAT_OFF_INT_PIN      50 // PC13 on raspberry expansion
-
 
 // Note that on the Due pin A0 on the board is channel 2 on the ARM chip
 #define ORIG_HEATER_BED_PIN   69 // PA0
 #define ORIG_HEATER_0_PIN     68 // PA1
-/*
 #define ORIG_HEATER_1_PIN      8 // PC22 on piggy
 #define ORIG_HEATER_2_PIN      9 // PC21 on piggy
 #define ORIG_HEATER_3_PIN     97 // PC20 on piggy
-*/
 
 #define ORIG_TEMP_BED_PIN      0 // PA16
 #define ORIG_TEMP_0_PIN        1 // PA24, analog pin
-/*
-#define ORIG_TEMP_1_PIN             5 // PA23 analog pin on piggy
-#define ORIG_TEMP_2_PIN             4 // PA22, analog pin on piggy
-#define ORIG_TEMP_3_PIN             3 // PA6, analog on piggy
-*/
+#define ORIG_TEMP_1_PIN        2 // PA23 analog pin on piggy
+#define ORIG_TEMP_2_PIN        3 // PA22, analog pin on piggy
+#define ORIG_TEMP_3_PIN        4 // PA6, analog on piggy
 
 #define LED_RED_PIN           40 // PC8
 #define LED_GREEN_PIN         41 // PC9
@@ -2551,7 +2543,8 @@
 
 #define EXP_VOLTAGE_LEVEL_PIN 65
 
-#define DAC_SYNC              53 // PB14
+#define DAC0_SYNC             53 // PB14
+#define DAC1_SYNC              6 // PC24
 
 //64K SPI EEPROM
 #define SPI_CHAN_EEPROM1       2

MarlinKimbra/stepper.cpp

@@ -289,7 +289,14 @@ void checkHitEndstops() {
   }
 }
 
-void enable_endstops(bool check) { check_endstops = check; }
+void enable_endstops(bool check) {
+  if (debugLevel & DEBUG_INFO) {
+    ECHO_SM(DB, "setup_for_endstop_move > enable_endstops");
+    if (check) ECHO_EM("(true)");
+    else ECHO_EM("(false)");
+  }
+  check_endstops = check;
+}
 
 // Check endstops
 inline void update_endstops() {
@@ -1251,7 +1258,7 @@ void digipot_init() {
   #if MB(ALLIGATOR)
     const float motor_current[] = MOTOR_CURRENT;
     unsigned int digipot_motor = 0;
-    for (uint8_t i = 0; i < 4; i++) {
+    for (uint8_t i = 0; i < 3 + DRIVER_EXTRUDERS; i++) {
       digipot_motor = 255 * (motor_current[i] / 2.5);
       ExternalDac::setValue(i, digipot_motor);
     }