Big Tree Tech EBB42 v1.1 board support

Marlin/src/core/boards.h

@@ -325,6 +325,7 @@
 #define BOARD_MKS_ROBIN_E3D           4020  // MKS Robin E3D (STM32F103RC)
 #define BOARD_MKS_ROBIN_E3D_V1_1      4021  // MKS Robin E3D V1.1 (STM32F103RC)
 #define BOARD_MKS_ROBIN_E3P           4022  // MKS Robin E3p (STM32F103VE)
+#define BOARD_BTT_EBB42_V1_1          4243  // BigTreeTech EBB42 V1.1 (STM32G0B1CB)
 #define BOARD_BTT_SKR_MINI_V1_1       4023  // BigTreeTech SKR Mini v1.1 (STM32F103RC)
 #define BOARD_BTT_SKR_MINI_E3_V1_0    4024  // BigTreeTech SKR Mini E3 (STM32F103RC)
 #define BOARD_BTT_SKR_MINI_E3_V1_2    4025  // BigTreeTech SKR Mini E3 V1.2 (STM32F103RC)

Marlin/src/pins/pins.h

@@ -533,6 +533,8 @@
   #include "stm32f1/pins_MKS_ROBIN_E3D_V1_1.h"  // STM32F1                                env:mks_robin_e3
 #elif MB(MKS_ROBIN_E3P)
   #include "stm32f1/pins_MKS_ROBIN_E3P.h"       // STM32F1                                env:mks_robin_e3p env:mks_robin_e3p_maple
+#elif MB(BTT_EBB42_V1_1)
+  #include "stm32g0/pins_BTT_EBB42_V1_1.h"      // STM32G0                                env:BTT_EBB42_V1_1_filament_extruder
 #elif MB(BTT_SKR_MINI_V1_1)
   #include "stm32f1/pins_BTT_SKR_MINI_V1_1.h"   // STM32F1                                env:STM32F103RC_btt env:STM32F103RC_btt_USB env:STM32F103RC_btt_maple env:STM32F103RC_btt_USB_maple
 #elif MB(BTT_SKR_MINI_E3_V1_0)

Marlin/src/pins/stm32g0/pins_BTT_EBB42_V1_1.h

@@ -0,0 +1,157 @@
+/**
+ * Marlin 3D Printer Firmware
+ * Copyright (c) 2021 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 <https://www.gnu.org/licenses/>.
+ *
+ */
+
+/** CAUTION **
+ *This board definition is to facilitate support for a Filament Extrusion
+ *devices, used to convert waste plastic into 3D printable filament. 
+ *This board is NOT a general 3D printing controller,
+ *it is NOT supported as a toolboard via CANBUS (as it was originally designed)
+ *or any device that requires kinematics
+ */
+#pragma once
+
+#ifndef BOARD_INFO_NAME
+  #define BOARD_INFO_NAME "BTT EBB42 V1.1"
+#endif
+
+//
+// EEPROM
+//
+#if EITHER(NO_EEPROM_SELECTED, FLASH_EEPROM_EMULATION)
+  #ifndef FLASH_EEPROM_EMULATION
+    #define FLASH_EEPROM_EMULATION
+  #endif
+  #define EEPROM_PAGE_SIZE      (0x800UL) // 2K
+  #define EEPROM_START_ADDRESS      (0x8000000UL + (FLASH_SIZE) - (EEPROM_PAGE_SIZE))
+  #define MARLIN_EEPROM_SIZE    EEPROM_PAGE_SIZE
+#endif
+
+//#define USES_DIAG_JUMPERS
+
+// Ignore temp readings during development.
+//#define BOGUS_TEMPERATURE_GRACE_PERIOD    2000
+
+#define LED_PIN                             PA13
+
+#define I2C_SDA_PIN                         PB4
+#define I2C_SCL_PIN                         PB3
+
+//
+// Servos
+//
+#define SERVO0_PIN                          PB9   // SERVOS
+
+//
+// Limit Switches
+//
+#define X_STOP_PIN                          PB6   // X-STOP
+#define Y_STOP_PIN                          PB5   // Y-STOP
+#define Z_STOP_PIN                          PB7   // Z-STOP
+
+//
+// Z Probe must be this pin
+//
+#define Z_MIN_PROBE_PIN                     PB8   // PROBE
+
+//
+// Steppers
+//
+#define X_ENABLE_PIN                        -1
+#define X_STEP_PIN                          PA10 //unused pin. Only assigned to a unattached pin to allow Marlin to compile
+#define X_DIR_PIN                           -1
+
+#define Y_ENABLE_PIN                        -1
+#define Y_STEP_PIN                          PA10 //unused pin. Only assigned to a unattached pin to allow Marlin to compile
+#define Y_DIR_PIN                           -1
+
+#define Z_ENABLE_PIN                        -1
+#define Z_STEP_PIN                          PA10 //unused pin. Only assigned to a unattached pin to allow Marlin to compile
+#define Z_DIR_PIN                           -1
+
+#define E0_ENABLE_PIN                       PD2
+#define E0_STEP_PIN                         PD0
+#define E0_DIR_PIN                          PD1
+
+#if HAS_TMC_UART
+  /**
+   * TMC220x stepper drivers
+   * Hardware serial communication ports
+   */
+  //#define E0_HARDWARE_SERIAL MSerial4
+
+  // This is the stable default value after testing, but, higher UART rates could be configured, remeber to test the Steppers with the M122 command to check if everything works.
+  //#define TMC_BAUD_RATE 250000
+
+  #define E0_SERIAL_TX_PIN                  PA15
+  #define E0_SERIAL_RX_PIN      E0_SERIAL_TX_PIN
+
+  // Reduce baud rate to improve software serial reliability
+  #define TMC_BAUD_RATE                    19200
+
+  // Default TMC slave addresses
+  #ifndef E0_SLAVE_ADDRESS
+    #define E0_SLAVE_ADDRESS 0b00
+  #endif
+#endif
+
+//
+// Temperature Sensors
+//
+#define TEMP_0_PIN                          PA3   // Analog Input "TH0"
+
+// SPI for MAX Thermocouple
+// Uses a separate SPI bus
+
+#define TEMP_0_CS_PIN                       PA4   // GTR K-TEMP
+#define TEMP_0_SCK_PIN                      PA5   // SCK
+#define TEMP_0_MISO_PIN                     PA6   // MISO
+#define TEMP_0_MOSI_PIN                     PA7   // For MAX31865
+
+//
+// Heaters / Fans
+//
+#define HEATER_0_PIN                        PA2   // "HE"
+#define FAN_PIN                             PA0   // "FAN0"
+#define FAN1_PIN                            PA1   // "FAN1"
+
+
+//
+// Default NEOPIXEL_PIN
+//
+#ifndef NEOPIXEL_PIN
+  #define NEOPIXEL_PIN                      PD3   // LED driving pin
+#endif
+
+//
+// LCD / Controller
+//
+#if HAS_WIRED_LCD
+  #undef X_STOP_PIN //Reusing the 'endstop' pins for a rotary encoder
+  #undef Y_STOP_PIN
+  #undef Z_STOP_PIN
+  #define X_STOP_PIN                        -1
+  #define Y_STOP_PIN                        -1
+  #define Z_STOP_PIN                        -1
+  #define BTN_EN1                           PB7
+  #define BTN_EN2                           PB5
+  #define BTN_ENC                           PB6
+#endif // HAS_WIRED_LCD

buildroot/share/PlatformIO/boards/marlin_BTT_EBB42_V1_1.json

@@ -0,0 +1,47 @@
+{
+  "build": {
+    "core": "stm32",
+    "cpu": "cortex-m0plus",
+    "extra_flags": "-DSTM32G0xx -DSTM32G0B1xx",
+    "f_cpu": "64000000L",
+    "framework_extra_flags": {
+      "arduino": "-D__CORTEX_SC=0"
+    },
+    "mcu": "stm32g0b1cbt6",
+    "product_line": "STM32G0B1xx",
+    "variant": "MARLIN_BTT_EBB42_V1_1"
+  },
+  "debug": {
+    "default_tools": [
+      "stlink"
+    ],
+    "jlink_device": "STM32G0B1CB",
+    "onboard_tools": [
+      "stlink"
+    ],
+    "openocd_target": "stm32g0x",
+    "svd_path": "STM32G0B1.svd"
+  },
+  "frameworks": [
+    "arduino",
+    "cmsis",
+    "libopencm3",
+    "stm32cube",
+    "zephyr"
+  ],
+  "name": "STM32G0B1CB",
+  "upload": {
+    "maximum_ram_size": 147456,
+    "maximum_size": 131072,
+    "protocol": "stlink",
+    "protocols": [
+      "stlink",
+      "jlink",
+      "cmsis-dap",
+      "blackmagic",
+      "mbed"
+    ]
+  },
+  "url": "https://www.st.com/content/st_com/en/products/microcontrollers-microprocessors/stm32-32-bit-arm-cortex-mcus/stm32-mainstream-mcus/stm32g0-series/stm32g0x1.html",
+  "vendor": "ST"
+}