RPI4b Revision 7 not supported by HAL_PI_GIO

itsme
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12 Jul 2023 15:24 #275286 by itsme

RPI4b Revision 7 not supported by HAL_PI_GIO was created by itsme

I received a new Raspberry 4b (4Gig) and after switching it with an older one Linuxcnc refuses to start.
There is an error message that Revision 7 is not supported by HAL_PI_GPIO...

How can this be resolved?

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elovalvo
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16 Jul 2023 15:17 #275572 by elovalvo

Replied by elovalvo on topic RPI4b Revision 7 not supported by HAL_PI_GIO

The problem is that the cpuinfo.c module needs to be updated.

To temporarily overcome the problem, copy the file /proc/cpuinfo in /tmp with the following command:

cp /proc/cpuinfo /tmp/cpuinfo.txt

Edit the contents of the /tmp/cpuinfo.txt file by changing the Revision to this

Revision: c03112

and then use the following command

mount --bind /tmp/cpuinfo.txt /proc/cpuinfo

and start LinuxCNC.

However it would be useful to completely review the functioning of the cpuinfo.c and hal_pi_gpio module as suggested in this link www.raspberrypi.com/documentation/comput...ry-pi-revision-codes

Let me know what revision your new Raspberry has.
To find out you need to type

cat /proc/cpuinfo |  grep Revision

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andypugh
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16 Jul 2023 15:44 #275575 by andypugh

Replied by andypugh on topic RPI4b Revision 7 not supported by HAL_PI_GIO

elovalvo wrote:
However it would be useful to completely review the functioning of the cpuinfo.c and hal_pi_gpio module as suggested in this link www.raspberrypi.com/documentation/comput...ry-pi-revision-codes

cpuinfo.c was changed last night.
github.com/LinuxCNC/linuxcnc/commit/2cb7...602d279d0bf5aca40e26

The following user(s) said Thank You: elovalvo

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itsme
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16 Jul 2023 16:04 - 16 Jul 2023 16:05 #275576 by itsme

Replied by itsme on topic RPI4b Revision 7 not supported by HAL_PI_GIO

Here is my cpuinfo:

Hardware    : BCM2835
Revision    : c03115
Serial        : 10000000eeeXXXXX
Model        : Raspberry Pi 4 Model B Rev 1.5

Last edit: 16 Jul 2023 16:05 by itsme.

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itsme
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16 Jul 2023 16:11 #275577 by itsme

Replied by itsme on topic RPI4b Revision 7 not supported by HAL_PI_GIO

I downloaded the corresponding files from github and used halcompile to generate the .so file.
Then i copied the file to /usr/lib/linuxcnc/modules.
unfortunately i still have an error on startup of Linuxcnc:

hal_pi2_gpio: dlopen: /usr/lib/linuxcnc/modules/hal_pi2_gpio.so: undefined symbol: get_rpi_revision
./RPI-mill.hal:39: waitpid failed /usr/bin/rtapi_app hal_pi2_gpio
./RPI-mill.hal:39: /usr/bin/rtapi_app exited without becoming ready
./RPI-mill.hal:39: insmod for hal_pi2_gpio failed, returned -1

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elovalvo
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16 Jul 2023 16:17 #275578 by elovalvo

Replied by elovalvo on topic RPI4b Revision 7 not supported by HAL_PI_GIO

itsme wrote:

Here is my cpuinfo:

Hardware    : BCM2835
Revision    : c03115
Serial        : 10000000eeeXXXXX
Model        : Raspberry Pi 4 Model B Rev 1.5

Did you try the workaround given here?

forum.linuxcnc.org/24-hal-components/495...by-hal-pi-gio#275572

The following user(s) said Thank You: itsme

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itsme
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16 Jul 2023 16:32 #275580 by itsme

Replied by itsme on topic RPI4b Revision 7 not supported by HAL_PI_GIO

I now tried the given workaround and this works well with the unmodified HAL_PI_GPIO.

Thank you!

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itsme
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16 Jul 2023 16:59 #275585 by itsme

Replied by itsme on topic RPI4b Revision 7 not supported by HAL_PI_GIO

Unfortunately this workaround is not persistent, after a reboot the cpuinfo is reset by the system and the workaround has to be done again to make LCNC start.

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elovalvo
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16 Jul 2023 17:20 - 16 Jul 2023 17:30 #275587 by elovalvo

Replied by elovalvo on topic RPI4b Revision 7 not supported by HAL_PI_GIO

[attachment=54524 wrote:
startlcnc.txt[/attachment]itsme post=275585 userid=28738"]Unfortunately this workaround is not persistent, after a reboot the cpuinfo is reset by the system and the workaround has to be done again to make LCNC start.

While waiting for Andy to complete his precious work, download this file to the Raspberry then run the following commands:

sudo cp startlcnc.txt /usr/local/bin/startlcnc
sudo chmod a+x /usr/local/bin/startlcnc

and LinuxCNC will always start at the command:

startlcnc

File Attachment:

File Name: startlcnc_...7-16.txt
File Size:0 KB

P.S. the system changed the file name by adding day and year. Once downloaded rename it startcnc.txt deleting the addition

Last edit: 16 Jul 2023 17:30 by elovalvo.

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itsme
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16 Jul 2023 20:57 #275597 by itsme

Replied by itsme on topic RPI4b Revision 7 not supported by HAL_PI_GIO

Thank you for your suggestion! I have not tested it yet, but I assume it will not work as expected.
The tmp folder is purged on startup...

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RPI4b Revision 7 not supported by HAL_PI_GIO

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