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✨ BTT SKR Pico
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‎Marlin/src/core/boards.h

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//
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#define BOARD_RP2040 6200 // Generic RP2040 Test board
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#define BOARD_BTT_SKR_PICO 6201 // BigTreeTech SKR Pico 1.x
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//
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// Custom board

‎Marlin/src/pins/pins.h

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#elif MB(RP2040)
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#include "rp2040/pins_RP2040.h" // RP2040 env:RP2040
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#elif MB(BTT_SKR_PICO)
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#include "rp2040/pins_BTT_SKR_Pico.h" // RP2040 env:SKR_Pico env:SKR_Pico_UART
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//
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// Custom board (with custom PIO env)

‎Marlin/src/pins/rp2040/env_validate.h

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/**
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* Marlin 3D Printer Firmware
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* Copyright (c) 2022 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
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*
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* Based on Sprinter and grbl.
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* Copyright (c) 2011 Camiel Gubbels / Erik van der Zalm
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <https://www.gnu.org/licenses/>.
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*
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*/
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#pragma once
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#if NOT_TARGET(__PLAT_RP2040__)
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#error "Oops! Make sure to build with target platform 'RP2040'."
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#endif

‎Marlin/src/pins/rp2040/pins_BTT_SKR_Pico.h

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/**
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* Marlin 3D Printer Firmware
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* Copyright (c) 2022 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
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*
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* Based on Sprinter and grbl.
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* Copyright (c) 2011 Camiel Gubbels / Erik van der Zalm
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <https://www.gnu.org/licenses/>.
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*
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*/
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#pragma once
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/**
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* BigTreeTech SKR Pico
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* https://github.com/bigtreetech/SKR-Pico
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*/
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#include "env_validate.h"
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#define BOARD_INFO_NAME "BTT SKR Pico"
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#define DEFAULT_MACHINE_NAME "BIQU 3D Printer"
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#define USBCON
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#ifndef MARLIN_EEPROM_SIZE
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#define MARLIN_EEPROM_SIZE 0x2000 // 8KB
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#endif
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//
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// Servos
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//
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#define SERVO0_PIN 29
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//
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// Limit Switches
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//
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#define X_DIAG_PIN 4
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#define Y_DIAG_PIN 3
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#define Z_DIAG_PIN 25 // probe:z_virtual_endstop
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#define X_STOP_PIN X_DIAG_PIN
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#define Y_STOP_PIN Y_DIAG_PIN
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#define Z_STOP_PIN Z_DIAG_PIN
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#ifndef FIL_RUNOUT_PIN
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#define FIL_RUNOUT_PIN 16 // E0-STOP
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#endif
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#ifndef Z_MIN_PROBE_PIN
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#define Z_MIN_PROBE_PIN 22
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#endif
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//
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// Steppers
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//
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#define X_STEP_PIN 11
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#define X_DIR_PIN 10
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#define X_ENABLE_PIN 12
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#define Y_STEP_PIN 6
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#define Y_DIR_PIN 5
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#define Y_ENABLE_PIN 7
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#define Z_STEP_PIN 19
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#define Z_DIR_PIN 28
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#define Z_ENABLE_PIN 2
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#define E0_STEP_PIN 14
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#define E0_DIR_PIN 13
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#define E0_ENABLE_PIN 15
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//
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// Temperature Sensors
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//
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#define TEMP_0_PIN 27 // Analog Input
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#define TEMP_BED_PIN 26 // Analog Input
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//
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// Heaters / Fans
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//
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#define HEATER_0_PIN 23
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#define HEATER_BED_PIN 21
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#define FAN_PIN 17
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#define FAN1_PIN 18
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#if HAS_CUTTER
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#define SPINDLE_LASER_ENA_PIN 0
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#define SPINDLE_LASER_PWM_PIN 1
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#else
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#define FAN2_PIN 20
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#endif
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//
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// Misc. Functions
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//
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#define NEOPIXEL_PIN 24
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/**
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* TMC2208/TMC2209 stepper drivers
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*/
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#if HAS_TMC_UART
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/**
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* Hardware serial communication ports.
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* If undefined software serial is used according to the pins below
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*/
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//#define X_HARDWARE_SERIAL Serial1
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//#define X2_HARDWARE_SERIAL Serial1
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//#define Y_HARDWARE_SERIAL Serial1
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//#define Y2_HARDWARE_SERIAL Serial1
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//#define Z_HARDWARE_SERIAL MSerial1
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//#define Z2_HARDWARE_SERIAL Serial1
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//#define E0_HARDWARE_SERIAL Serial1
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//#define E1_HARDWARE_SERIAL Serial1
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//#define E2_HARDWARE_SERIAL Serial1
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//#define E3_HARDWARE_SERIAL Serial1
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//#define E4_HARDWARE_SERIAL Serial1
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/**
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* Software serial
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*/
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#ifndef X_SERIAL_TX_PIN
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#define X_SERIAL_TX_PIN 8
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#endif
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#ifndef X_SERIAL_RX_PIN
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#define X_SERIAL_RX_PIN 9
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#endif
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#ifndef Y_SERIAL_TX_PIN
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#define Y_SERIAL_TX_PIN 8
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#endif
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#ifndef Y_SERIAL_RX_PIN
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#define Y_SERIAL_RX_PIN 9
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#endif
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#ifndef Z_SERIAL_TX_PIN
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#define Z_SERIAL_TX_PIN 8
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#endif
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#ifndef Z_SERIAL_RX_PIN
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#define Z_SERIAL_RX_PIN 9
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#endif
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#ifndef E0_SERIAL_TX_PIN
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#define E0_SERIAL_TX_PIN 8
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#endif
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#ifndef E0_SERIAL_RX_PIN
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#define E0_SERIAL_RX_PIN 9
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#endif
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#endif

‎buildroot/tests/SKR_Pico

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#!/usr/bin/env bash
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#
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# Build tests for BTT SKR Pico
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#
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# exit on first failure
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set -e
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#
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# Build with the default configurations
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#
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restore_configs
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opt_set MOTHERBOARD BOARD_BTT_SKR_PICO
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exec_test $1 $2 "Default Configuration" "$3"
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# clean up
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restore_configs

‎ini/raspberrypi.ini

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build_flags = ${common.build_flags} -D__PLAT_RP2040__ -Wno-expansion-to-defined
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#debug_tool = jlink
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#upload_protocol = jlink
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#
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# BigTreeTech SKR Pico 1.x
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#
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[env:SKR_Pico]
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extends = env:RP2040
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[env:SKR_Pico_UART]
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extends = env:SKR_Pico

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