Raspberry Pi 4 & MESA 7i92

Thanks andypugh!

1GB RAM and the RPi3 definitely swaps. In fact, I disabled all this by doing some lateral tuning just to better performance and to avoid SD card stressing. Of course I change it back when I get this error, but no success.

I think there is an issue on the way the virtual memory is handled by debuild command on -armhf architectures. I also try dpkg-buildpackage command but the same thing, so I think both commands share low level functions at some point. I'm not absolutely sure, but my few tests address me in that way.
Maybe someone with deep knowledge about package building could enlighten us?

As a workaround I decide not to build the package. I just build linuxcnc from source as states here:

linuxcnc.org/docs/master/html/code/build...cnc.html#Quick-Start

I know I waste all the advantages of building a package but, in the meantime, it works!

Thanks!

Hi people,

With the last problem solved. Now a run into this one:

LINUXCNC - 2.9.0~pre0
Machine configuration directory is '/home/pi/emc/configs/gmoccapy-rpi3-mesa-mill-v1.0.1'
Machine configuration file is 'gmoccapy-rpi3-mesa-mill-v1.0.1.ini'
Starting LinuxCNC...
Found file(REL): ./gmoccapy-rpi3-mesa-mill-v1.0.1.hal
Note: Using POSIX realtime
motmod: already exists
hm2: loading Mesa HostMot2 driver version 0.15
hm2/hm2_7c81.0: Low Level init 0.15
hm2/hm2_7c81.0: Smart Serial Firmware Version 43
hm2/hm2_7c81.0: 57 I/O Pins used:
hm2/hm2_7c81.0: IO Pin 000 (P1-01): PWMGen #0, pin Out0 (PWM or Up) (Output)
hm2/hm2_7c81.0: IO Pin 001 (P1-02): IOPort
hm2/hm2_7c81.0: IO Pin 002 (P1-03): StepGen #0, pin Step (Output)
hm2/hm2_7c81.0: IO Pin 003 (P1-04): IOPort
hm2/hm2_7c81.0: IO Pin 004 (P1-05): StepGen #0, pin Direction (Output)
hm2/hm2_7c81.0: IO Pin 005 (P1-06): IOPort
hm2/hm2_7c81.0: IO Pin 006 (P1-07): StepGen #1, pin Step (Output)
hm2/hm2_7c81.0: IO Pin 007 (P1-08): IOPort
hm2/hm2_7c81.0: IO Pin 008 (P1-09): StepGen #1, pin Direction (Output)
hm2/hm2_7c81.0: IO Pin 009 (P1-11): StepGen #2, pin Step (Output)
hm2/hm2_7c81.0: IO Pin 010 (P1-13): StepGen #2, pin Direction (Output)
hm2/hm2_7c81.0: IO Pin 011 (P1-15): StepGen #3, pin Step (Output)
hm2/hm2_7c81.0: IO Pin 012 (P1-17): StepGen #3, pin Direction (Output)
hm2/hm2_7c81.0: IO Pin 013 (P1-19): IOPort
hm2/hm2_7c81.0: IO Pin 014 (P1-21): Encoder #0, pin A (Input)
hm2/hm2_7c81.0: IO Pin 015 (P1-23): Encoder #0, pin B (Input)
hm2/hm2_7c81.0: IO Pin 016 (P1-25): Encoder #0, pin Index (Input)
hm2/hm2_7c81.0: IO Pin 017 (J5-TX0): IOPort
hm2/hm2_7c81.0: IO Pin 018 (J6-TX1): IOPort
hm2/hm2_7c81.0: IO Pin 019 (P2-01): PWMGen #1, pin Out0 (PWM or Up) (Output)
hm2/hm2_7c81.0: IO Pin 020 (P2-02): IOPort
hm2/hm2_7c81.0: IO Pin 021 (P2-03): StepGen #4, pin Step (Output)
hm2/hm2_7c81.0: IO Pin 022 (P2-04): IOPort
hm2/hm2_7c81.0: IO Pin 023 (P2-05): StepGen #4, pin Direction (Output)
hm2/hm2_7c81.0: IO Pin 024 (P2-06): IOPort
hm2/hm2_7c81.0: IO Pin 025 (P2-07): StepGen #5, pin Step (Output)
hm2/hm2_7c81.0: IO Pin 026 (P2-08): IOPort
hm2/hm2_7c81.0: IO Pin 027 (P2-09): StepGen #5, pin Direction (Output)
hm2/hm2_7c81.0: IO Pin 028 (P2-11): StepGen #6, pin Step (Output)
hm2/hm2_7c81.0: IO Pin 029 (P2-13): StepGen #6, pin Direction (Output)
hm2/hm2_7c81.0: IO Pin 030 (P2-15): StepGen #7, pin Step (Output)
hm2/hm2_7c81.0: IO Pin 031 (P2-17): StepGen #7, pin Direction (Output)
hm2/hm2_7c81.0: IO Pin 032 (P2-19): IOPort
hm2/hm2_7c81.0: IO Pin 033 (P2-21): Encoder #1, pin A (Input)
hm2/hm2_7c81.0: IO Pin 034 (P2-23): Encoder #1, pin B (Input)
hm2/hm2_7c81.0: IO Pin 035 (P2-25): Encoder #1, pin Index (Input)
hm2/hm2_7c81.0: IO Pin 036 (J5-TXEN0): IOPort
hm2/hm2_7c81.0: IO Pin 037 (J6-TXEN1): IOPort
hm2/hm2_7c81.0: IO Pin 038 (P7-01): IOPort
hm2/hm2_7c81.0: IO Pin 039 (P7-02): IOPort
hm2/hm2_7c81.0: IO Pin 040 (P7-03): IOPort
hm2/hm2_7c81.0: IO Pin 041 (P7-04): IOPort
hm2/hm2_7c81.0: IO Pin 042 (P7-05): IOPort
hm2/hm2_7c81.0: IO Pin 043 (P7-06): IOPort
hm2/hm2_7c81.0: IO Pin 044 (P7-07): IOPort
hm2/hm2_7c81.0: IO Pin 045 (P7-08): IOPort
hm2/hm2_7c81.0: IO Pin 046 (P7-09): IOPort
hm2/hm2_7c81.0: IO Pin 047 (P7-11): IOPort
hm2/hm2_7c81.0: IO Pin 048 (P7-13): IOPort
hm2/hm2_7c81.0: IO Pin 049 (P7-15): IOPort
hm2/hm2_7c81.0: IO Pin 050 (P7-17): IOPort
hm2/hm2_7c81.0: IO Pin 051 (P7-19): IOPort
hm2/hm2_7c81.0: IO Pin 052 (P7-21): IOPort
hm2/hm2_7c81.0: IO Pin 053 (P7-23): IOPort
hm2/hm2_7c81.0: IO Pin 054 (P7-25): IOPort
hm2/hm2_7c81.0: IO Pin 055 (P5-RX0): IOPort
hm2/hm2_7c81.0: IO Pin 056 (P6-RX1): IOPort
hm2/hm2_7c81.0: registered
Found file(REL): ./custom.hal
[TASK] CYCLE_TIME not found in /home/pi/emc/configs/gmoccapy-rpi3-mesa-mill-v1.0.1/gmoccapy-rpi3-mesa-mill-v1.0.1.ini; using default 0.100000
USRMOT: ERROR: command timeout
emcMotionInit: emcTrajInit failed
Waiting for component 'inihal' to become ready..............USRMOT: ERROR: command timeout
emcMotionInit: emcTrajInit failed

Any idea?

I also tried to use pncconf just in case, but it doesn't even works. It throws the following warning and of course my board configuration does not appear in the list (7c81) :

You have no hostmot2 firmware downloaded in folder:
/lib/firmware/hm2/
PNCconf will use internal firmware data

Besides, I don't know how to set my board in the pncconf. I was googling but didn't find any clue.

Thanks!

motmod: already exists

is the likely reason LinuxCNC is not starting
This maybe due to a hal file error or a previous failed
LinuxCNC run

You should be able to use pncconf to create a template hal/ini file set
(say for a 5i25) and just change the driver and board name and perhaps some
GPIO numbers to get a working configuration

Thanks Peter! Finally linuxcnc is up and running.


Now I need to use one encoder from mesa 7c81 but differs a bit from the linuxcnc module version. I need to use the encoder as a simple counter (just input A in counter-mode).

Is there any example using an encoder from a mesa card?

Thanks!

You can use the normal encoder counter as a simple (A only) counter by setting
the encoders counter-mode parameter true. This sets the encoder counter into UP/DOWN
mode. Beware that the "B" input sets the count direction in UP/DOWN mode.

Thanks Peter!

You can use the normal encoder counter

What do you mean "normal-encoder"? The software module provided by linuxcnc? I want to use the hardware module from 7c81 to relief my RPi3 cpu workload.

I already have running the software encoder. I want to use the hardware one that the 7c81 provides.
I'm using a RPi3 so I don't want to overload the cpu, that's why I decide to add a 7c81 to the project.

Thanks!

I mean the HM2 hardware encoder module has a UP/DOWN mode

ok, I use

# IO Pin 014 (P1-21): Encoder #0, pin A (Input)
setp hm2_7c81.0.encoder.00.counter-mode true

I get a perfect square signal from the scope but when I connect to the P1-21 pin from the 7c81 it keeps the level high.

BTW
But halshow shows it as an OUT pin. So...
No count detected in halshow.

What I'm doing wrong?

Wrong pin?

You might verify that you have the correct pin by looking at the GPIO 14 state
or the encoder input A pin state in halshow

hm2/hm2_7c81.0: IO Pin 014 (P1-21): Encoder #0, pin A (Input)

Sorry but, we are talking about P1-21 physical pin right? Why 14?
I addressed the pin as:
hm2_7c81.0.encoder.00.input-a
I do not use 21 nor 14 pin in the sentence.

Anyway pin 21 shows as an output in halshow:
hm2_7c81.0.gpio.021.in false
It shouldn't be true?

Pin 14 shows as an input in halshow:
hm2_7c81.0.gpio.014.in true