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probably possible, here are a few rpi/ i2c driver samples i have saved 

github.com/bosston88/LinuxCNCRPi/blob/ma...hive/i2c%20example.c
github.com/bosston88/LinuxCNCRPi/blob/master/mcp3421.c
github.com/bosston88/LinuxCNCRPi/blob/master/si7021.c
github.com/thgerner/hal_mcp23017

royka wrote:

@rodw Can you confirm that it's the same with the Raspberry or is that kernel source already patched?
 

Sorry, I have no Idea. I don't have a Pi5.
Did you find the code Linuxcnc uses for this check in Git?
 

Can you please try this later version of the linuxcnc image
drive.google.com/file/d/16xQfd_zXuXXKXqO...IY0/view?usp=sharing
I believe the screen issues are solved because the underlying Pi code had some fixes

did you found a way to set resolution?

thanks in advacnce

tommylight wrote:

Out of curiosity, how much is a RPI and a good touchscreen these days?
Wondering as i got a Lenovo X1 Carbon Yoga for 120 and a Lenovo Yoga Y370 for 220, bot work for LinuxCNC with Mesa, both have 120Hz touchscreens, very high quality ones, very good keyboards, and both do over 4-6 hours on batteries.

RaspberryPi was $50 locally, the touchscreens $80-100ish Canadian pesos from Amazon. So a shade > US$100 for both. I can't vouch for the "good" WRT reliability the resolution/sharpness is decent not ipad quality but quite acceptable for a CNC machine.

@rodw Can you confirm that it's the same with the Raspberry or is that kernel source already patched?

I noticed that the patch only works when VMCORE_INFO=y which gets selected by:
 - CRASH_DUMP [=y] && ARCH_SUPPORTS_CRASH_DUMP [=y] && KEXEC_CORE [=y] 
 - PROC_KCORE [=y] && PROC_FS [=y] && MMU [=y]

Is really necessary for LinuxCNC to check that /sys/kernel/realtime or will checking for "PREEMPT_RT" in uname -v be enough?

No idea if there is a driver for I2C in LinuxCNC, maybe searching on github project page would show if there is anything about it there.

I'm not sure about axis, but I think it's compatible with most resolutions, but if you're able to find a 1920x1080 display you'll have more choice of user interfaces. For a smoother experience a Raspberry Pi 5 is a better choice.

I'm looking for a suitable small 7-10" touchscreen display for use with LinuxCNC (lor a lathe). I plan to uses a RaspberryPI 4 that has a HDMI interface. The display will be positioned so that my eyes will be quite close ~12" from the display.

This one is cheap enough not sure if 1024x600 is compatible with axis?
www.amazon.ca/gp/product/B0CPM15T7H/ref=...o00_s00?ie=UTF8&th=1

or this one; 1920x1200

www.amazon.ca/Wstirhy-Portable-Kickstand...y%2Caps%2C160&sr=8-9


I have read there are some compatibility issues with some displays, so if anyone can recommend a display that is known to work well, please share the details.

Thanks

I see there are previous threads about this, but things change with time and releases, so better to ask then chase my tail.

I previously setup LinuxCNC - Axis on a desktop PC for my mill, works great now I want to do the same for my lathe using a RaspberryPi4 Model B (4GB RAM, 32GB SD)

How do I go about this?  Some form of instructions would be very helpful.
Link to whatever version I should use?
Does the install prompt what type of machine this will be used (Mill, lathe etc)?
I ordered a A MESA 7i96S, not sure when it will get here.

Any helpful hints are welcome.

Thanks in advance.


 

Hello #MyFirstPostHere,I am trying to attach a BME280 sensor to a Raspberry Pi 4B to monitor environmental variables (temperature, pressure, and humidity). The sensor is connected to the 3.3V, GND, GPIO2, and GPIO3 pins. It works flawlessly when running Raspbian OS (64-bit), and I can retrieve readings via the terminal.However, when trying to use it with LinuxCNC, I encountered multiple errors.Upon checking the I2C buses with the command, I foundand, but I was expecting, as seen in Raspbian OS.I was wondering if there is a solution for this? Is it possible to get this sensor working on LinuxCNC?Please feel free to ask for any additional information.

I was typing up a post to ask for help getting LinuxCNC 2.9.2 running on a Raspberry Pi 4 B attached to a Raspberry Pi 7 inch Touch Display, when I finally figured out the solution. Thought I'd still make the post for helping others or possibly even future me if I have to rebuild this system one day.

The Pi Touch uses DSI for connecting to a Raspberry Pi and seems LinuxCNC doesn't have the required settings enabled in the config.txt by default. Not really a surprise as its probably an unusual pairing of hardware and OS.

The solution was adding the below text to config.txt

What would be the best 3d printer board to use with remora spi and raspberry pi 5 please? For k40 style co2 laser, so I dont need too many motors.

Maybe it's useful info ...
i had to power the RPI5 using a normal 5V/10A DIN power supply. Manage to do it and keep 4.7V at 3.1 A , enough for RPI to avoid detection of an undervoltage condition.
But then I was curios about the official RPI power supply ... and I have tested it with an electronic load: I've got the same voltage ( around 5.14V) from 0.5A up to 5.9 A .. at 6A it shuts itself down nice and safely ).
I think the official power supply is dinamically compensating the cable impedance by increasing the output voltage from the regulator based on measured current .
So if you need 5A , be very careful with the cable or just use the official power  supply , if possible ...
All of these where done with PD disabled ( a small USB-C breakout board with 5.11kohm on CC lines)

Hello, I have been doing some research and I want to understand better the difference on these systems, for instance these setups in the videos use Raspberry pi 4 and Ethercat so he can directly talk to the servos and no mesa card is needed, I understand Ethercat makes wiring much more simple and the cabinet has less parts,also on some servos is possible to do homing directly, some cons seem that is  harder to implement because there is less info out there and hardware is possibly more expensive usually, but my question is to know if it is as powerful as a mesa card setup on the max step rate side of things? any other toughts I may be missing?

 


Thanks!