Pico Universal PWM Won't boot Random pins not working

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LearningLinuxCNC
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19 Dec 2025 02:19 #340295 by LearningLinuxCNC

Pico Universal PWM Won't boot Random pins not working was created by LearningLinuxCNC

So I have not used my RB1-CNC machine for a while. I tried starting it up today and I am getting errors on load that have to do with not being able to find pins on the Pico Systems Universal PWM board. Sometimes it won't find the board at all other times it won't find an generic IO pin other times it won't find an encoder pin.

This was working then I had to reconfigure from 2.7 to 2.8 and got it working again and now after setting for around a year I can't get it to load into linuxcnc unless I comment out of the hal files that tie to the pins on the UPWM board.

Here is one of the error outputs.

Error report created by /usr/lib/tcltk/linuxcnc/show_errors.tcl:

Print file information:
RUN_IN_PLACE=no
LINUXCNC_DIR=
LINUXCNC_BIN_DIR=/usr/bin
LINUXCNC_TCL_DIR=/usr/lib/tcltk/linuxcnc
LINUXCNC_SCRIPT_DIR=
LINUXCNC_RTLIB_DIR=/usr/lib/linuxcnc/modules
LINUXCNC_CONFIG_DIR=
LINUXCNC_LANG_DIR=/usr/lib/tcltk/linuxcnc/msgs
INIVAR=inivar
HALCMD=halcmd
LINUXCNC_EMCSH=/usr/bin/wish8.6
LINUXCNC - 2.8.4-1-gb7824717b
Machine configuration directory is '/home/jim/linuxcnc/configs/RB1-CNC_Gmoccapy_DEV_1_10'
Machine configuration file is 'RB1-CNC_Gmoccapy.ini'
INIFILE=/home/jim/linuxcnc/configs/RB1-CNC_Gmoccapy_DEV_1_10/RB1-CNC_Gmoccapy.ini
VERSION=1.1
PARAMETER_FILE=sim.var
TASK=milltask
HALUI=halui
DISPLAY=gmoccapy
COORDINATES=XYZ
KINEMATICS=trivkins coordinates=XYZ
Starting LinuxCNC...
Starting LinuxCNC server program: linuxcncsvr
Loading Real Time OS, RTAPI, and HAL_LIB modules
Starting LinuxCNC IO program: io
Starting HAL User Interface program: halui
Found file(REL): ./univpwm_load.hal
Found file(REL): ./univpwm_servo.hal
Found file(REL): ./univpwm_io.hal
Shutting down and cleaning up LinuxCNC...
Removing HAL_LIB, RTAPI, and Real Time OS modules
Removing NML shared memory segments

Debug file information:
Note: Using POSIX realtime
PPMC: bus 0 epp_dir = 0
PPMC: bus 1 epp_dir = 0
PPMC: bus 2 epp_dir = 0
PPMC: checking EPP bus 0 at port 0378
PPMC: slot 0: ID code: 08 PPMC: Check Parallel Port connection.
read cache bitmap: 00000000
write cache bitmap: 00000000
PPMC: slot 1: ID code: 10 PPMC encoder card 1
PPMC: exporting encoder pins / params
read cache bitmap: 00001fff
write cache bitmap: 00002000
PPMC: slot 2: ID code: 28 PPMC DAC card
PPMC:  exporting PPMC DAC
read cache bitmap: 00000000
write cache bitmap: 000000ff
PPMC: slot 3: ID code: 21 PPMC DAC card
PPMC:  exporting PPMC DAC
read cache bitmap: 00000000
write cache bitmap: 000000ff
PPMC: slot 4: nothing detected at addr 4 reads 4f
PPMC: slot 5: nothing detected at addr 5 reads 5f
PPMC: slot 6: nothing detected at addr 6 reads 6f
PPMC: slot 7: nothing detected at addr 7 reads 7f
PPMC: slot 8: nothing detected at addr 8 reads 8f
PPMC: slot 9: nothing detected at addr 9 reads 9f
PPMC: slot 10: nothing detected at addr a reads af
PPMC: slot 11: nothing detected at addr b reads bf
PPMC: slot 12: nothing detected at addr c reads cf
PPMC: slot 13: nothing detected at addr d reads 5f
PPMC: slot 14: nothing detected at addr e reads ef
PPMC: slot 15: nothing detected at addr f reads ff
PPMC: bus 0 complete
./univpwm_io.hal:14: Pin 'ppmc.0.din.04.in' does not exist
1199
Stopping realtime threads
Unloading hal components
PPMC: shutting down
Note: Using POSIX realtime



-----------------------------------------------------------------------
Info report created by linuxcnc_info:
The file:    /tmp/linuxcnc_info.txt
can be posted to a forum or a web site like:
     http://pastebin.com
in order to provide information about the linuxcnc
system and configuration.

                Date: Thu 18 Dec 2025 08:12:47 PM CST
            UTC Date: Fri 19 Dec 2025 02:12:47 AM UTC
        this program: /usr/bin/linuxcnc_info
              uptime: 20:12:47 up 1 min, 1 user, load average: 0.98, 0.53, 0.20
     lsb_release -sa: Debian Debian GNU/Linux 10 (buster) 10 buster
      which linuxcnc: /usr/bin/linuxcnc
                 pwd: /home/jim/linuxcnc/configs/RB1-CNC_Gmoccapy_DEV_1_10
                USER: jim
             LOGNAME: jim
                HOME: /home/jim
              EDITOR:
              VISUAL:
            LANGUAGE:
                TERM: dumb
           COLORTERM:
             DISPLAY: :0.0
             DESKTOP: lightdm-xsession
        display size: 1600x900 pixels (423x238 millimeters)
                PATH: /usr/bin:/home/jim/linuxcnc/configs/RB1-CNC_Gmoccapy_DEV_1_10/bin:/usr/bin:/usr/local/bin:/usr/bin:/bin:/usr/local/games:/usr/games

uname items:
         nodename -n: RB1CNC
      kernel-name -s: Linux
      kernel-vers -v: #1 SMP PREEMPT RT Debian 4.19.249-2 (2022-06-30)
          machine -m: x86_64
        processor -p: unknown
         platform -i: unknown
      oper system -o: GNU/Linux

/proc items:
             cmdline: BOOT_IMAGE=/boot/vmlinuz-4.19.0-21-rt-amd64 root=UUID=43e45ba2-b737-4e61-84e3-76e380b282e4 ro quiet
          model name: Intel(R) Celeron(R) CPU J3455 @ 1.50GHz
               cores: 4
             cpu MHz: 1191.600
             parport: 0000-0000 : parport0 0000-0000 : parport0
              serial: 0000-0000 : serial 0000-0000 : serial

Versions:
                 gcc: gcc (Debian 8.3.0-6) 8.3.0
              python: Python 2.7.16
                 git: not_in_PATH
          git commit: NA
                 tcl: 8.6
                  tk: 8.6
               glade: not_in_PATH
          glade-gtk2: not_in_PATH

linuxcnc_var all:

     LINUXCNCVERSION: 2.8.4-1-gb7824717b
LINUXCNC_AUX_GLADEVCP: /usr/share/linuxcnc/aux_gladevcp
LINUXCNC_AUX_EXAMPLES: /usr/share/linuxcnc/aux_examples
            REALTIME: /etc/init.d/realtime
                 RTS: uspace
          HALLIB_DIR: /usr/share/linuxcnc/hallib

dpkg -l '*linuxcnc*':
Desired=Unknown/Install/Remove/Purge/Hold
| Status=Not/Inst/Conf-files/Unpacked/halF-conf/Half-inst/trig-aWait/Trig-pend
|/ Err?=(none)/Reinst-required (Status,Err: uppercase=bad)
||/ Name                Version              Architecture Description
+++-===================-====================-============-=====================================================================
un  linuxcnc            <none>               <none>       (no description available)
un  linuxcnc-dev        <none>               <none>       (no description available)
un  linuxcnc-doc        <none>               <none>       (no description available)
ii  linuxcnc-doc-en     1:2.8.4.1.gb7824717b all          motion controller for CNC machines and robots (English documentation)
ii  linuxcnc-doc-es     1:2.8.4.1.gb7824717b all          controlador de movimiento para máquinas CNC y robots (Español).
ii  linuxcnc-doc-fr     1:2.8.4.1.gb7824717b all          motion controller for CNC machines and robots (French documentation)
un  linuxcnc-sim        <none>               <none>       (no description available)
un  linuxcnc-sim-dev    <none>               <none>       (no description available)
ii  linuxcnc-uspace     1:2.8.4.1.gb7824717b amd64        motion controller for CNC machines and robots
ii  linuxcnc-uspace-dev 1:2.8.4.1.gb7824717b amd64        PC based motion controller for real-time Linux

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