Add PICA shields support (#16891)

Marlin/src/core/boards.h

@@ -141,6 +141,8 @@
 #define BOARD_EINSTART_S              1319  // Einstart retrofit
 #define BOARD_WANHAO_ONEPLUS          1320  // Wanhao 0ne+ i3 Mini
 #define BOARD_LEAPFROG_XEED2015       1321  // Leapfrog Xeed 2015
+#define BOARD_PICA_REVB               1322  // PICA Shield (original version)
+#define BOARD_PICA                    1323  // PICA Shield (rev C or later)
 
 //
 // ATmega1281, ATmega2561

Marlin/src/pins/mega/pins_PICA.h

@@ -0,0 +1,143 @@
+/**
+ * Marlin 3D Printer Firmware
+ * Copyright (c) 2020 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
+ *
+ * Based on Sprinter and grbl.
+ * Copyright (c) 2011 Camiel Gubbels / Erik van der Zalm
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+/**
+ * Arduino Mega with PICA pin assignments
+ *
+ * PICA is Power, Interface, and Control Adapter and is open source hardware.
+ * See https://github.com/mjrice/PICA for schematics etc.
+ *
+ * Applies to PICA, PICA_REVB
+ */
+
+#ifndef BOARD_NAME
+  #define BOARD_NAME "PICA"
+#endif
+
+/*
+// Note that these are the "pins" that correspond to the analog inputs on the arduino mega.
+// These are not the same as the physical pin numbers
+  AD0 = 54;   AD1 = 55;   AD2 = 56;   AD3 = 57;   
+  AD4 = 58;   AD5 = 59;   AD6 = 60;   AD7 = 61;   
+  AD8 = 62;   AD9 = 63;   AD10 = 64;  AD11 = 65;
+  AD12 = 66;  AD13 = 67;  AD14 = 68;  AD15 = 69;
+*/
+
+#if !defined(__AVR_ATmega1280__) && !defined(__AVR_ATmega2560__)
+  #error "Oops!  Make sure you have 'Arduino Mega' selected from the 'Tools -> Boards' menu."
+#endif
+
+//
+// Limit Switches
+//
+#define X_MIN_PIN          14
+#define X_MAX_PIN          15
+#define Y_MIN_PIN          16
+#define Y_MAX_PIN          17
+#define Z_MIN_PIN          23
+#define Z_MAX_PIN          22
+
+//
+// Steppers
+//
+#define X_STEP_PIN         55
+#define X_DIR_PIN          54
+#define X_ENABLE_PIN       60     
+
+#define Y_STEP_PIN         57
+#define Y_DIR_PIN          56
+#define Y_ENABLE_PIN       61
+
+#define Z_STEP_PIN         59
+#define Z_DIR_PIN          58
+#define Z_ENABLE_PIN       62
+
+#define E0_STEP_PIN        67 
+#define E0_DIR_PIN         24
+#define E0_ENABLE_PIN      26
+
+//
+// Temperature Sensors
+//
+#define TEMP_0_PIN          9   // Analog Input
+#define TEMP_1_PIN         10
+#define TEMP_BED_PIN       10
+#define TEMP_2_PIN         11
+#define TEMP_3_PIN         12
+
+//
+// Heaters / Fans
+//
+#ifndef HEATER_0_PIN
+  #define HEATER_0_PIN     10   // E0
+#endif
+#ifndef HEATER_1_PIN
+  #define HEATER_1_PIN      2   // E1
+#endif
+#define HEATER_BED_PIN      8   // HEAT-BED
+
+#ifndef FAN_PIN
+  #define FAN_PIN           9
+#endif
+#ifndef FAN_2_PIN
+  #define FAN_2_PIN         7
+#endif
+
+#define SDPOWER_PIN        -1
+#define LED_PIN            -1 
+#define PS_ON_PIN          -1
+#define KILL_PIN           -1
+      
+#define SSR_PIN             6
+
+// SPI for Max6675 or Max31855 Thermocouple
+#if DISABLED(SDSUPPORT)
+  #define MAX6675_SS_PIN   66   // Don't use 53 if using Display/SD card
+#else
+  #define MAX6675_SS_PIN   66   // Don't use 49 (SD_DETECT_PIN)
+#endif
+
+//
+// SD Support
+//
+#define SD_DETECT_PIN      49 
+#define SDSS               53
+
+//
+// LCD / Controller
+//
+#define BEEPER_PIN         29
+
+#if HAS_SPI_LCD
+  #define LCD_PINS_RS      33
+  #define LCD_PINS_ENABLE  30
+  #define LCD_PINS_D4      35
+  #define LCD_PINS_D5      32
+  #define LCD_PINS_D6      37
+  #define LCD_PINS_D7      36
+
+  #define BTN_EN1          47
+  #define BTN_EN2          48
+  #define BTN_ENC          31
+
+  #define LCD_SDSS         53
+#endif

Marlin/src/pins/mega/pins_PICAOLD.h

@@ -0,0 +1,28 @@
+/**
+ * Marlin 3D Printer Firmware
+ * Copyright (c) 2020 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
+ *
+ * Based on Sprinter and grbl.
+ * Copyright (c) 2011 Camiel Gubbels / Erik van der Zalm
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+#define HEATER_0_PIN        9   // E0
+#define HEATER_1_PIN       10   // E1
+#define FAN_PIN            11
+#define FAN2_PIN           12
+
+#include "pins_PICA.h"

Marlin/src/pins/pins.h

@@ -252,6 +252,10 @@
   #include "mega/pins_HJC2560C_REV2.h"          // ATmega2560                             env:megaatmega2560
 #elif MB(LEAPFROG_XEED2015)
   #include "mega/pins_LEAPFROG_XEED2015.h"      // ATmega2560                             env:megaatmega2560
+#elif MB(PICA)
+  #include "mega/pins_PICA.h"                   // ATmega2560                             env:megaatmega2560
+#elif MB(PICA_REVB)
+  #include "mega/pins_PICAOLD.h"                // ATmega2560                             env:megaatmega2560
 
 //
 // ATmega1281, ATmega2561