LPC1768/1769 Port of RepRapFirmware v3.1.x The original 3.0 thread was getting a little old (and long) so we have decided to create a new thread for V3.1.x (which includes the current 3.1.1 versions). We have also included a number of links to information which will hopefully help anyone trying to use this port. [b]History[/b] The original LPC port of RRF firmware was created by Sdavi and details of that can be found here https://reprap.org/forum/read.php?147,810214 and here https://reprap.org/forum/read.php?147,859857, a huge thanks for this and continuing work. The LPC port of RRF is based upon the Duet3D source which can be found here https://github.com/Duet3D many thanks to DC42 for his help and support. [b]Released files[/b] Version 3.1.x binary versions can be found here: https://github.com/gloomyandy/RepRapFirmware/releases there are currently 4 different builds for different hardware configurations... firmware-wifi.bin for users with add-on ESP8266 WiFi boards firmware-nonet.bin for users that do not need networking support - this is the only build that has support for RepRap style displays. firmware-eth-notmc.bin for users that have hardwired Ethernet networks (typically smoothieboard, or MKS SBase boards), this version does not have TMC driver support. firmware-sbc.bin for users that wish to attach an external Raspberry Pi SBC. Unfortunately due to memory limitations it is not possible to include all features in a single build. The source code for the above builds is provided in a set of github repositories, the builds are usually tagged with the release version: https://github.com/gloomyandy/CoreLPC4RRF Hardware support framework for the LPC version https://github.com/gloomyandy/RepRapFirmware Main RRF source modified for use with LPC https://github.com/gloomyandy/RRFLibraries Additional libraries https://github.com/gloomyandy/DuetWiFiSocketServer RRF ESP 8266 WiFi Module source https://github.com/gloomyandy/Arduino Modified versions of the ESP8266 Arduino build system for the WiFi Module [b]Getting started[/b] For information on how to use and configure the LPC version please see the Wiki pages: https://github.com/gloomyandy/RepRapFirmware/wiki For details of which boards and drivers are currently supported please see: https://github.com/gloomyandy/RepRapFirmware/wiki/Supported There is an LPC specific version of the online configuration tool that will help you build the needed gcode files used to setup the firmware for your machine. You can find it here: https://jaysuk.github.io/LPCConfigurator All of the above has been provided by Jay_S, thanks Jay! For users who would like to attach a WiFi module or Raspberry Pi SBC to their LPC board, user PCR has created adaptor boards see: https://www.tindie.com/stores/pcr/ [b]Support[/b] To make it easier to provide support to users of this firmware we have created a discord server which can be found here: https://discord.gg/uS97Qs7 This is probably the best place to get help if you need it. [b]Further information[/b] There is a huge amount of useful information available about RRF as part of the Duet3D documentation: https://duet3d.dozuki.com/c/RepRapFirmware in particular a complete list of available gcodes can be found here: https://duet3d.dozuki.com/Wiki/Gcode The Duet3D forum is also a great place to find information: https://forum.duet3d.com/ The links provided here are up to date as of 6-July-2020, but it is not possible to modify this post, so please check for further updates in the thread. https://reprap.org/forum/read.php?147,874661,874661#msg-874661 Fri, 15 May 2026 10:25:40 -0400 Phorum 5.2.23 https://reprap.org/forum/read.php?147,874661,879756#msg-879756 Re: LPC1768/1769 Port of RepRapFirmware v3.1.x https://reprap.org/forum/read.php?147,874661,879756#msg-879756

There won't be a further 3.1.1 release.
3.2 RC1 should be released in a few days time. I would suggest moving to that as its fairly stable]]> jay_s Firmware - experimental, borrowed, and future Mon, 21 Dec 2020 11:34:51 -0500 https://reprap.org/forum/read.php?147,874661,879755#msg-879755 Re: LPC1768/1769 Port of RepRapFirmware v3.1.x https://reprap.org/forum/read.php?147,874661,879755#msg-879755 diman77 Firmware - experimental, borrowed, and future Mon, 21 Dec 2020 11:24:29 -0500 https://reprap.org/forum/read.php?147,874661,877862#msg-877862 Re: LPC1768/1769 Port of RepRapFirmware v3.1.x https://reprap.org/forum/read.php?147,874661,877862#msg-877862 Ps: i just realised there is another topic for stm32 specific, it seems i can't delete the message too.]]> mechanik Firmware - experimental, borrowed, and future Sat, 03 Oct 2020 10:39:07 -0400 https://reprap.org/forum/read.php?147,874661,876856#msg-876856 Re: LPC1768/1769 Port of RepRapFirmware v3.1.x https://reprap.org/forum/read.php?147,874661,876856#msg-876856
Quote
gloomyandy
@fenixsz, you will almost certainly get more help if you use the LPC discord server (see the LPC Wiki for details). The M911 command you are trying to use requires that the main board is able to monitor the supply voltage, the BTT SKR boards do not have that feature. When using the BTT UPS it sends a trigger value to the board and it may be possible to configure RRF to use this trigger, but it is not something I've tried nor have I seen any posts from users that have done this and have it working. You should probably ask this question again on the discord server.

Thanks!]]> fenixsz Firmware - experimental, borrowed, and future Wed, 02 Sep 2020 03:14:18 -0400 https://reprap.org/forum/read.php?147,874661,876843#msg-876843 Re: LPC1768/1769 Port of RepRapFirmware v3.1.x https://reprap.org/forum/read.php?147,874661,876843#msg-876843 gloomyandy Firmware - experimental, borrowed, and future Tue, 01 Sep 2020 17:58:11 -0400 https://reprap.org/forum/read.php?147,874661,876840#msg-876840 Re: LPC1768/1769 Port of RepRapFirmware v3.1.x https://reprap.org/forum/read.php?147,874661,876840#msg-876840 @gloomyandy and the rest! Thanks for the great opportunity to dive into reprap firmware. I am relatively new to 3d printing as I am with my first having it for 3 months, but decided to change Marlin as I had many problems with features not available on pure TFT BTT35 V2 - filament sensor, BTT Mini UPS Resume Print, etc. Thankfully, RepRap Firmware seems to work great with exception of the Mini UPS.

I set sensorless homing which works perfectly. Did a bit of calibration with pressure advance. I must say that I put some sweat to make the heater on the bed working! Being new to the RepRap I thought there is some bug or I did something bad on my SKR 1.4 turbo. But after reading the 3D Beginner's blog, I found my solution with the PID tunning.

The one thing I currently struggle to make it working is the Resume printing with the help of BTT mini UPS 24V. I have the following line in my config.g. Is it the case, that this feature is not working because of the limited memory we have on SKR boards?
M911 S23.5 R23.7 P"M913 X0 Y0 G91 M83 G1 Z3 E-5 F1000" ;enable power-loss recovery

My Setup:
COREXY Sapphire Plus
SKR 1.4 Turbo + TMC2209
TFT35 V2
BTT Mini UPS 24v
BTT Shutdown Relay (currently with hardware problem)]]> fenixsz Firmware - experimental, borrowed, and future Tue, 01 Sep 2020 16:17:30 -0400 https://reprap.org/forum/read.php?147,874661,876790#msg-876790 Re: LPC1768/1769 Port of RepRapFirmware v3.1.x https://reprap.org/forum/read.php?147,874661,876790#msg-876790 jay_s Firmware - experimental, borrowed, and future Mon, 31 Aug 2020 13:08:02 -0400 https://reprap.org/forum/read.php?147,874661,876788#msg-876788 Re: LPC1768/1769 Port of RepRapFirmware v3.1.x https://reprap.org/forum/read.php?147,874661,876788#msg-876788 spegelius Firmware - experimental, borrowed, and future Mon, 31 Aug 2020 13:02:12 -0400 https://reprap.org/forum/read.php?147,874661,876751#msg-876751 Re: LPC1768/1769 Port of RepRapFirmware v3.1.x https://reprap.org/forum/read.php?147,874661,876751#msg-876751 You'll need to perform the hardware modification as detailed here [github.com]
Most of the settings are the same, you just don't need to include 8266wifi.espDataReadyPin or 8266wifi.espResetPin in your board.txt file

Prepare the wiring (e.g. resistors etc) as per here [github.com]]]> jay_s Firmware - experimental, borrowed, and future Sun, 30 Aug 2020 15:40:49 -0400 https://reprap.org/forum/read.php?147,874661,876748#msg-876748 Re: LPC1768/1769 Port of RepRapFirmware v3.1.x https://reprap.org/forum/read.php?147,874661,876748#msg-876748 duet3] keeps telling that DCS is not started.]]> spegelius Firmware - experimental, borrowed, and future Sun, 30 Aug 2020 14:20:29 -0400 https://reprap.org/forum/read.php?147,874661,876404#msg-876404 Re: LPC1768/1769 Port of RepRapFirmware v3.1.x https://reprap.org/forum/read.php?147,874661,876404#msg-876404 Serge_P Firmware - experimental, borrowed, and future Fri, 21 Aug 2020 17:58:22 -0400 https://reprap.org/forum/read.php?147,874661,876054#msg-876054 Re: LPC1768/1769 Port of RepRapFirmware v3.1.x https://reprap.org/forum/read.php?147,874661,876054#msg-876054 The whole firmware for the ESP would require porting.
I'm not aware of any plans for this to be done for the Duet range of boards either]]> jay_s Firmware - experimental, borrowed, and future Thu, 13 Aug 2020 03:29:23 -0400 https://reprap.org/forum/read.php?147,874661,876053#msg-876053 Re: LPC1768/1769 Port of RepRapFirmware v3.1.x https://reprap.org/forum/read.php?147,874661,876053#msg-876053 niku Firmware - experimental, borrowed, and future Thu, 13 Aug 2020 03:25:38 -0400 https://reprap.org/forum/read.php?147,874661,875717#msg-875717 Re: LPC1768/1769 Port of RepRapFirmware v3.1.x https://reprap.org/forum/read.php?147,874661,875717#msg-875717 jay_s Firmware - experimental, borrowed, and future Sat, 01 Aug 2020 09:37:20 -0400 https://reprap.org/forum/read.php?147,874661,875716#msg-875716 Re: LPC1768/1769 Port of RepRapFirmware v3.1.x https://reprap.org/forum/read.php?147,874661,875716#msg-875716 Can I add driver expansion to my SKR_Turbo board ?
i want to use three motors on the z axis, so i need one additional driver
In the Marlin firmware, it might be a little easy for me to do it, but in RRF I have never learned how to change the Pin function on the board]]> exbal Firmware - experimental, borrowed, and future Sat, 01 Aug 2020 09:34:45 -0400 https://reprap.org/forum/read.php?147,874661,875159#msg-875159 Re: LPC1768/1769 Port of RepRapFirmware v3.1.x https://reprap.org/forum/read.php?147,874661,875159#msg-875159 gloomyandy Firmware - experimental, borrowed, and future Sun, 19 Jul 2020 03:50:55 -0400 https://reprap.org/forum/read.php?147,874661,875158#msg-875158 Re: LPC1768/1769 Port of RepRapFirmware v3.1.x https://reprap.org/forum/read.php?147,874661,875158#msg-875158
Also the layer artifacts are present with Marlin too, so nothing firmware related.]]> spegelius Firmware - experimental, borrowed, and future Sun, 19 Jul 2020 03:27:40 -0400 https://reprap.org/forum/read.php?147,874661,875126#msg-875126 Re: LPC1768/1769 Port of RepRapFirmware v3.1.x https://reprap.org/forum/read.php?147,874661,875126#msg-875126 spegelius Firmware - experimental, borrowed, and future Fri, 17 Jul 2020 12:45:16 -0400 https://reprap.org/forum/read.php?147,874661,875124#msg-875124 Re: LPC1768/1769 Port of RepRapFirmware v3.1.x https://reprap.org/forum/read.php?147,874661,875124#msg-875124 github.com]]]> gloomyandy Firmware - experimental, borrowed, and future Fri, 17 Jul 2020 12:39:18 -0400 https://reprap.org/forum/read.php?147,874661,875092#msg-875092 Re: LPC1768/1769 Port of RepRapFirmware v3.1.x https://reprap.org/forum/read.php?147,874661,875092#msg-875092 gloomyandy Firmware - experimental, borrowed, and future Thu, 16 Jul 2020 18:11:32 -0400 https://reprap.org/forum/read.php?147,874661,875086#msg-875086 Re: LPC1768/1769 Port of RepRapFirmware v3.1.x https://reprap.org/forum/read.php?147,874661,875086#msg-875086 jay_s Firmware - experimental, borrowed, and future Thu, 16 Jul 2020 15:17:22 -0400 https://reprap.org/forum/read.php?147,874661,875085#msg-875085 Re: LPC1768/1769 Port of RepRapFirmware v3.1.x https://reprap.org/forum/read.php?147,874661,875085#msg-875085 spegelius Firmware - experimental, borrowed, and future Thu, 16 Jul 2020 15:01:51 -0400 https://reprap.org/forum/read.php?147,874661,875079#msg-875079 Re: LPC1768/1769 Port of RepRapFirmware v3.1.x https://reprap.org/forum/read.php?147,874661,875079#msg-875079 jay_s Firmware - experimental, borrowed, and future Thu, 16 Jul 2020 14:14:42 -0400 https://reprap.org/forum/read.php?147,874661,875078#msg-875078 Re: LPC1768/1769 Port of RepRapFirmware v3.1.x https://reprap.org/forum/read.php?147,874661,875078#msg-875078 When frequency is 400Hz or lower, to get the fan to spin issue M106 S0-254, i.e. something else than 255 and then M106 S255. As a quick fix I tried adding M106 S0 to the end of config.g, didn't help and to start script of my slicer, didn't help either. Maybe there's a command that resets something when print is starting?

Not an huge issue, then only reason for frequencies lower than 500 is the current part cooling fan on my printer, which I need to replace anyways as it is an axial fan and inadequate with Volcano. The other fan I tried starts happily with lower speeds even at 500Hz frequency so I don't need to use a lower frequency.

I do have a couple of Duet boards, I'll check if this happens with those boards and this fan too.]]> spegelius Firmware - experimental, borrowed, and future Thu, 16 Jul 2020 14:11:32 -0400 https://reprap.org/forum/read.php?147,874661,875067#msg-875067 Re: LPC1768/1769 Port of RepRapFirmware v3.1.x https://reprap.org/forum/read.php?147,874661,875067#msg-875067
Ok, good to know about the Wifi-module. I'll probably try the SBC route at some point, with raspi I could use a webcam. For now ethernet is fine.]]> spegelius Firmware - experimental, borrowed, and future Thu, 16 Jul 2020 08:52:43 -0400 https://reprap.org/forum/read.php?147,874661,875066#msg-875066 Re: LPC1768/1769 Port of RepRapFirmware v3.1.x https://reprap.org/forum/read.php?147,874661,875066#msg-875066
good to hear another user with it working on the MKS Sbase.
What are your loading times like on the first load of DWC?

And you won't be able to use the MKS tft Wifi-module as thats an ESP-01 and doesn't have enough pins etc.
The NodeMCU or Wemos Mini are the recommended type]]> jay_s Firmware - experimental, borrowed, and future Thu, 16 Jul 2020 08:39:40 -0400 https://reprap.org/forum/read.php?147,874661,875065#msg-875065 Re: LPC1768/1769 Port of RepRapFirmware v3.1.x https://reprap.org/forum/read.php?147,874661,875065#msg-875065
Couple of issues though:
- at first the board kept resetting itself and it was impossible to get connected with DWC. The board got an IP address, but right after trying to connecti with wget or browser, the board would reset itself. It seems the problem was that I had enabled 12864-display support as the LPC-configurator offered. Disabling that seems to fix that and now it seems to be quite stable. A couple rests have happened, but at that time I had two connections to DWC.
- FAN0 doesn't start when issuing M106 S255. Nudging the slider to 95 and back to 100 in DWC starts the fan. Not sure if this is due to the fan or something else. I had to reduce the frequency from 500 to 50 get the fan to turn with speeds below 100.

The single HTTP connection is a bit of an issue since occasionally I want to control the printer through my phone instead of my PC. So maybe setting up a nginx reverse proxy to limit the connection to DWC to single connection would overcome that problem.]]> spegelius Firmware - experimental, borrowed, and future Thu, 16 Jul 2020 08:33:54 -0400 https://reprap.org/forum/read.php?147,874661,874997#msg-874997 Re: LPC1768/1769 Port of RepRapFirmware v3.1.x https://reprap.org/forum/read.php?147,874661,874997#msg-874997
Quote
MKSA
The MKS in addition to be a pain with the Ethernet, uses 8825 stepper drivers soldered in place.
And the slow / fast decay pin is fixed and not externally accessible. Which leads to all kinds of problems.

From what I learnt in the github wiki the SPI pins are not externally accessible but through a level shifter. Only solution to get this working is to unsolder an RC lowpass on some other header and use that.]]> avion23 Firmware - experimental, borrowed, and future Tue, 14 Jul 2020 07:34:28 -0400 https://reprap.org/forum/read.php?147,874661,874882#msg-874882 Re: LPC1768/1769 Port of RepRapFirmware v3.1.x https://reprap.org/forum/read.php?147,874661,874882#msg-874882
Quote
gloomyandy
The WiFi is not MKS. it is a separate nodemcu module (ESP8266) that you hook up either using and adaptor board or make up your own wiring loom. It connects to the main board using SPI and the connection is pretty fast. The details are here: [github.com] not for everyone, but at least a couple of folks (in addition to me) have it working with the SBase.

Yep the download should take less than 80 seconds over WiFi it is only a couple of seconds or so (if that). SO I'm pretty sure that there is something not right, but your case seems much worse than others but I can't see anything wrong with how it is set up. I have my board hooked up to a router that supports 10/100/1000Mbit and it claims to have connected at 100Mbit.

I see but for for a few dollars more, I would prefer a SKR 1.4 turbo with Wifi module. The MKS in addition to be a pain with the Ethernet, uses 8825 stepper drivers soldered in place.]]> MKSA Firmware - experimental, borrowed, and future Sat, 11 Jul 2020 15:09:12 -0400 https://reprap.org/forum/read.php?147,874661,874871#msg-874871 Re: LPC1768/1769 Port of RepRapFirmware v3.1.x https://reprap.org/forum/read.php?147,874661,874871#msg-874871 github.com] not for everyone, but at least a couple of folks (in addition to me) have it working with the SBase.

Yep the download should take less than 80 seconds over WiFi it is only a couple of seconds or so (if that). SO I'm pretty sure that there is something not right, but your case seems much worse than others but I can't see anything wrong with how it is set up. I have my board hooked up to a router that supports 10/100/1000Mbit and it claims to have connected at 100Mbit.]]> gloomyandy Firmware - experimental, borrowed, and future Sat, 11 Jul 2020 10:54:13 -0400