Advanced Search

I just tested this at the beginning of rt_peripheral_init and it compiles and works on my RPi5 and RPi400 if you include the attached dtcboards.h:

int rt_peripheral_init(void)
{
    FILE *fp;
    int i, j;
    char buf[256];
    ssize_t buflen;
    char *cptr;
    const int DTC_MAX = 8;
    const char *dtcs[DTC_MAX + 1];
    
    // assume were only running on >RPi3
    
    if ((fp = fopen("/proc/device-tree/compatible" , "rb"))){

        // Read the 'compatible' string-list from the device-tree
        buflen = fread(buf, 1, sizeof(buf), fp);
        if(buflen < 0) {
            rtapi_print_msg(RTAPI_MSG_ERR,"Failed to read platform identity.\n");
            return -1;
        }

        // Decompose the device-tree buffer into a string-list with the pointers to
        // each string in dtcs. Don't go beyond the buffer's size.
        memset(dtcs, 0, sizeof(dtcs));
        for(i = 0, cptr = buf; i < DTC_MAX && cptr; i++) {
            dtcs = cptr;
            j = strlen(cptr);
            if((cptr - buf) + j + 1 < buflen)
                cptr += j + 1;
            else
                cptr = NULL;
        }

        for(i = 0; dtcs != NULL; i++) {
            if(        !strcmp(dtcs, DTC_RPI_MODEL_4B)
                ||    !strcmp(dtcs, DTC_RPI_MODEL_4CM)
                ||    !strcmp(dtcs, DTC_RPI_MODEL_400)
                ||    !strcmp(dtcs, DTC_RPI_MODEL_3BP)
                ||    !strcmp(dtcs, DTC_RPI_MODEL_3AP)
                ||    !strcmp(dtcs, DTC_RPI_MODEL_3B)) {
                rtapi_print_msg(RTAPI_MSG_ERR, "Raspberry Pi 3 or 4, using BCM2835 driver\n");
                bcm = true;
                break;    // Found our supported board
            }else if(!strcmp(dtcs, DTC_RPI_MODEL_5B) || !strcmp(dtcs, DTC_RPI_MODEL_5CM)) {
                rtapi_print_msg(RTAPI_MSG_ERR, "Raspberry Pi 5, using rp1 driver\n");
                rp1 = true;
                break;    // Found our supported board
            }else{
                rtapi_print_msg(RTAPI_MSG_ERR, "Error, RPi not detected\n");
                return -1;
            }
        }
        fclose(fp);
    }else{
        rtapi_print_msg(RTAPI_MSG_ERR,"Cannot open '/proc/device-tree/compatible' for read.\n");
    }    
    
    if (bcm == true){
...

I was after 12 hours of milling parts in the shop, and another 5 hours of trying to set up linuxcnc, so don't be too angry in your judgment.
I also solved the problem as follows:

sudo nano /etc/X11/etc/X11/xrdp/xorg.conf
search for OPTION "DRMDevice" line
and replace with
Option "DRMDevice" ""
save, reboot and all work fine after!

I don't know why you insisted on saying that it was so, when I clearly told you I created the images and did not have those software packages installed.


Sometimes I don't know why I even fucking bother.

Sorry, you are right, the original image is clean. my mistake!

If you are using the Linuxcnc 2.9.4 images, and as you claim have any rdp or vnc packages installed it means the images themselves have been compromised. If this is the case I would make a report either on the mailing list or github pages. Links to these can be found at the Linuxcnc homepage.
The copy of the image that I am running on my RPi5 does not have any of the packages pre installed. The images I am using are the ones that I built and submitted to be put on the downloads page.
This is a very serious situation, so I want you think about whether you are using the Linuxcnc images that have been downloaded from the Linuxcnc downloads page and carefully rethink your statement that you did not install these packages yourself.
As I said this is a very serious matter and must be dealt with accordingly.

Are you absolutely sure you are using the Linuxcnc image. Because when I made the RPi4 and RPi5 images I didn't put any remote access software in the image other than SSH.
Please read the paragraph above very carefully.
No RDP nor VNC packages were put in the list of packages to be installed.

"And please no double posting." What do you mean by that?

I use the system with a 7 inch original rpi touch screen display, and I wish to use rdp for easy configuration of the system. For this reason I try to configure rdp server. (the rdp server was all ready in the image, I didn't install it...)
I asked here because I use the linux image from this post. If is not oky please let me know where to move the question.
Tnx.

To be perfectly honest your issue is somewhat out the scope of the support found on the forum.
It is quite obvious you installed the remote software on the RPi, as I didn't build the image with any remote connection software other than SSH.
Your best bet would be to try the various Debian forums, the raspberry pi forums usually deal with issues with Raspios.
The RPi images are Debian Bookworm, with the kernel source from the RPi sources and Linuxcnc packages installed.
The images are not expected to be run via any remote desktop, hence the reason no remote desktop software is included, nor is it expected to be used as a general purpose OS.
What is your reason to run remotely ?
And please no double posting. My apologies I got confused by another user that was having the same issue.

Hi,
When I try to log in with rdp from windows 11, it accepts user and pass, but after the image displays something pixelated as if there were 100 miniature desktop . Has anyone else experienced this? (rpi 4 4gb ). Everything else works ok so far..

Ethercat Update Sun, 16th Feb 2025

Ethercat installs and kernel modules build, some will build for running kernel, some build for 6.1.x kernel, but load with just a message about tainting kernel in logs. Just need someone with Ethercat hardware to confirm operation.

@rodw,
I'm very grateful. The suggested external offsets operate in a manner comparable to what I require. I plan to try integrating them with my current Raspberry Pi setup.

Ethercat appears to install ok, some modules are built for the current kernel, some are built for 6.1.0-31-arm64.

With no Ethercat devices connected I get this, would this indicate a good install ?

bring your remora related discussion into this thread

www.forum.linuxcnc.org/18-computer/42276...rocontroller-via-spi

and upload your hal/ini files using the forums attachments please

I spent some hours..

1) flashed the octopus MCU with dfu-util
2) draft version of HAL and INI files done
3) wiring pi5 correctly to the octopus
4) pi5 is running remora flexi os

The error is from linux cnc when it loads my config: joint.5.scale pin doesnt exist. If I do a show pin with halcmd it shows a bunch of joints unit joint.4.

HAL file
INI file

Remote desktop has issues.

Set the CPU scaling governor to performance.

The Raspberry Pi might not be powerful enough for that.