Add MRR_ESPA/_ESPE (ESP32) boards (#16238)

Marlin/src/pins/esp32/pins_MRR_ESPA.h

@@ -0,0 +1,101 @@
+/**
+ * Marlin 3D Printer Firmware
+ * Copyright (c) 2019 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/>.
+ *
+ */
+#pragma once
+
+/**
+ * MRR ESPA pin assignments
+ * MRR ESPA is a 3D printer control board based on the ESP32 microcontroller.
+ * Supports 4 stepper drivers, heated bed, single hotend.
+ */
+
+#ifndef ARDUINO_ARCH_ESP32
+  #error "Oops! Select an ESP32 board in 'Tools > Board.'"
+#elif EXTRUDERS > 1 || E_STEPPERS > 1
+  #error "MRR ESPA only supports one E Stepper. Comment out this line to continue."
+#elif HOTENDS > 1
+  #error "MRR ESPA currently supports only one hotend. Comment out this line to continue."
+#endif
+
+#define BOARD_INFO_NAME       "MRR ESPA"
+#define BOARD_WEBSITE_URL     "github.com/maplerainresearch/MRR_ESPA"
+#define DEFAULT_MACHINE_NAME  BOARD_INFO_NAME
+
+//
+// Disable I2S stepper stream
+//
+#ifdef I2S_STEPPER_STREAM
+  #undef I2S_STEPPER_STREAM
+#endif
+#define I2S_WS              -1
+#define I2S_BCK             -1
+#define I2S_DATA            -1
+
+//
+// Limit Switches
+//
+#define X_STOP_PIN         34
+#define Y_STOP_PIN         35
+#define Z_STOP_PIN         15
+
+//
+// Steppers
+//
+#define X_STEP_PIN         27
+#define X_DIR_PIN          26
+#define X_ENABLE_PIN       25
+//#define X_CS_PIN           21
+
+#define Y_STEP_PIN         33
+#define Y_DIR_PIN          32
+#define Y_ENABLE_PIN       X_ENABLE_PIN
+//#define Y_CS_PIN           22
+
+#define Z_STEP_PIN         14
+#define Z_DIR_PIN          12
+#define Z_ENABLE_PIN       X_ENABLE_PIN
+//#define Z_CS_PIN            5 // SS_PIN
+
+#define E0_STEP_PIN        16
+#define E0_DIR_PIN         17
+#define E0_ENABLE_PIN      X_ENABLE_PIN
+//#define E0_CS_PIN          21
+
+//
+// Temperature Sensors
+//
+#define TEMP_0_PIN         36   // Analog Input
+#define TEMP_BED_PIN       39   // Analog Input
+
+//
+// Heaters / Fans
+//
+#define HEATER_0_PIN        2
+#define FAN_PIN            13
+#define HEATER_BED_PIN      4
+
+//
+// MicroSD card
+//
+#define MOSI_PIN           23
+#define MISO_PIN           19
+#define SCK_PIN            18
+#define SDSS                5