Marlin VS Sanguino

There is _a lot_ wrong with Marlin. It is a complex codebase, full with ancient artefacts, litterred with preprocessor ifdefs every 2-3 lines of code, dynamic includes in the middle of CPP files, etc[1]. It's about as unreadable as C++ code gets--well, I guess it's not template metaprogramming.

Klipper by contrast is a breeze to read through[2].

I am very grateful for Marlin, for all of reprap, and everyone who has contributed to it. But saying there is nothing wrong with it is straight up misguided.

[1]: https://github.com/MarlinFirmware/Marlin/blob/bugfix-2.1.x/M...

[2]: https://github.com/Klipper3d/klipper/blob/master/src/lcd_hd4...

I think you are mistaken. I can't speak for implementations preceding the Ender 3 V2, so what you're saying may have been true at some point for other machines. However, here you can see Marlin developers confirm that there is an EEPROM on the stock E2V2 board using diagrams from Creality and photographic confirmation. Here is the datasheet for the EEPROM. Here is a thread discussing this Marlin release, and also the then-recent release of official Creality firmware which resolved the same issue. Since the stock firmware is based on Marlin, and at the time Marlin did not support this type of EEPROM, the EEPROM was not usable at launch. Any mainstream firmware (official or third-party) from the last three years will be using the onboard EEPROM unless the user intentionally specified otherwise.

pull latest Marlin from github: https://github.com/MarlinFirmware/Marlin

Also, checked the following discussion but seems like I need to update the firmware to be able to comment that like right? Temperature variance monitor tweaks by zeleps · Pull Request #23571 · MarlinFirmware/Marlin · GitHub

i spent some time and successfully rebased Kobra 2.8.2 OG firmware from an unknown Marlin ~2.0.8 frankenstein to a clean latest (as of now) release (not bugfix) 2.1.x -- v2.1.2.1 + 1 commit

As an example, check the macropocalypse in Marlin - but the actual trigger for me to start was Reprap firmware doing a floating point divide in interrupt context while targeting AVR8 core…

Any change of thermistor or to a PT100/PT1000 will require recompiling the firmware, because every type has different characteristics. Marlin uses an internal table to calculate the temperature for whatever reading it gets from the CPU's analogue-to-digital converter. It has many tables for different thermistors, but only one is ever incorporated at compile time. So you have to specify which type you're using. You can see the commonly-used types in the list in Marlin's Configuration.h file, in the section headed // @section temperature. The tables themselves are in Marlin/src/module/thermistor.

FWIW It IS open source but the GNU General Public License v3.0 rules apply. https://github.com/MarlinFirmware/Marlin/blob/bugfix-2.1.x/LICENSE

The first time I programmed my v1.1.4 board, I set up an Arduino Uno to use as the programmer, in ArduinoIDE 1.8.9. Then I used the board manager to install https://raw.githubusercontent.com/Lauszus/Sanguino/master/package_lauszus_sanguino_index.json to the "Additional Boards Manager URLs" field as per the instructions at https://github.com/Lauszus/Sanguino/tree/master, and installed the bootloader. That was in early 2019, and I didn't have any problems, but I believe that later versions of ArduinoIDE 2.x may be slightly different. Maybe worth trying an older version?

/** * 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 . * */ #pragma once /** * Sanguinololu board pin assignments */ /** * Rev B 26 DEC 2016 * * 1) added pointer to a current Arduino IDE extension * 2) added support for M3, M4 & M5 spindle control commands * 3) added case light pin definition */ /** * A useable Arduino IDE extension (board manager) can be found at * https://github.com/Lauszus/Sanguino * * This extension has been tested on Arduino 1.6.12 & 1.8.0 * * Here's the JSON path: * https://raw.githubusercontent.com/Lauszus/Sanguino/master/package_lauszus_sanguino_index.json * * When installing select 1.0.2 * * Installation instructions can be found at https://learn.sparkfun.com/pages/CustomBoardsArduino * Just use the above JSON URL instead of Sparkfun's JSON. * * Once installed select the Sanguino board and then select the CPU. */ #define ALLOW_MEGA644P #include "env_validate.h" #ifndef BOARD_INFO_NAME #define BOARD_INFO_NAME "Sanguinololu <1.2" #endif // // Limit Switches // #define X_STOP_PIN 18 #define Y_STOP_PIN 19 #define Z_STOP_PIN 20 // // Steppers // #define X_STEP_PIN 15 #define X_DIR_PIN 21 #define Y_STEP_PIN 22 #define Y_DIR_PIN 23 #define Z_STEP_PIN 3 #define Z_DIR_PIN 2 #define E0_STEP_PIN 1 #define E0_DIR_PIN 0 // // Temperature Sensors // #define TEMP_0_PIN 7 // Analog Input (pin 33 extruder) #define TEMP_BED_PIN 6 // Analog Input (pin 34 bed) // // Heaters / Fans // #define HEATER_0_PIN 13 // (extruder) #if ENABLED(SANGUINOLOLU_V_1_2) #define HEATER_BED_PIN 12 // (bed) #define X_ENABLE_PIN 14 #define Y_ENABLE_PIN 14 #define Z_ENABLE_PIN 26 #define E0_ENABLE_PIN 14 #if !defined(FAN_PIN) && ENABLED(LCD_I2C_PANELOLU2) #define FAN_PIN 4 // Uses Transistor1 (PWM) on Panelolu2's Sanguino Adapter Board to drive the fan #endif #else #define HEATER_BED_PIN 14 // (bed) #define X_ENABLE_PIN 4 #define Y_ENABLE_PIN 4 #define Z_ENABLE_PIN 4 #define E0_ENABLE_PIN 4 #endif #if !defined(FAN_PIN) && (MB(AZTEEG_X1, STB_11) || IS_MELZI) #define FAN_PIN 4 // Works for Panelolu2 too #endif

Grab the Sanguino Board plugin here - https://github.com/Lauszus/sanguino/zipball/master and extract to Desktop

I believe it's the Sanguino 1284P. Have a look at the Github: https://github.com/Lauszus/Sanguino