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    Guru Meditation Error

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    • P Offline
      pigamonte
      last edited by

      I am also seeing Guru Meditation Errors with latest firmware v1.20.1.r2 and vanilla releases.
      Here's just a few:

      Guru Meditation Error: Core 1 panic'ed (Unhandled debug exception)
      Guru Meditation Error: Core 0 panic'ed (IllegalInstruction). Exception was unhandled.
      Guru Meditation Error: Core 0 panic'ed (IllegalInstruction). Exception was unhandled.

      The code makes heavy use of the UARTs and runs flawlessly on desktop.

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      • A Offline
        andreas
        last edited by andreas

        Dear @sita,

        decoding the core dump shows (without guarantee):

        ==================== CURRENT THREAD STACK =====================
#0  0x4009192e in vTaskExitCritical (mux=0x844a) at /Users/iwahdan/esp/pycom-esp-idf/components/freertos/tasks.c:4274
#1  0x401124f0 in lora_join (n_args=1073518712, pos_args=0x3ffc990c <lora_partial_rx_packet+12>, kw_args=0x401124f0 <lora_join+16>) at mods/modlora.c:1843

======================== THREADS INFO =========================
  Id   Target Id         Frame
  16   process 15        0x4000bff0 in ?? ()
  15   process 14        xQueueCreateCountingSemaphoreStatic (uxMaxCount=1073426000, uxInitialCount=1073431200, pxStaticQueue=0x3ffb2e9c) at /Users/iwahdan/esp/pycom-esp-idf/components/freertos/queue.c:659
  14   process 13        xQueueCreateCountingSemaphoreStatic (uxMaxCount=1073495820, uxInitialCount=0, pxStaticQueue=0x3ffc3f58 <vflash_mem+1900>) at /Users/iwahdan/esp/pycom-esp-idf/components/freertos/queue.c:659
  13   process 12        xQueueCreateCountingSemaphoreStatic (uxMaxCount=1073444348, uxInitialCount=0, pxStaticQueue=0x3ffb7648) at /Users/iwahdan/esp/pycom-esp-idf/components/freertos/queue.c:659
  12   process 11        0x4000bff0 in ?? ()
  11   process 10        xQueueCreateCountingSemaphoreStatic (uxMaxCount=1073458244, uxInitialCount=1073580336, pxStaticQueue=0x3ffbac90) at /Users/iwahdan/esp/pycom-esp-idf/components/freertos/queue.c:659
  10   process 9         xQueueCreateCountingSemaphoreStatic (uxMaxCount=1073445832, uxInitialCount=0, pxStaticQueue=0x3ffb7c14) at /Users/iwahdan/esp/pycom-esp-idf/components/freertos/queue.c:659
  9    process 8         xQueueCreateCountingSemaphoreStatic (uxMaxCount=1073589088, uxInitialCount=1073603328, pxStaticQueue=0x3ffdabac) at /Users/iwahdan/esp/pycom-esp-idf/components/freertos/queue.c:659
  8    process 7         0x4000bff0 in ?? ()
  7    process 6         0x40092b55 in xTaskNotify (xTaskToNotify=0x0, ulValue=<optimized out>, eAction=<optimized out>) at /Users/iwahdan/esp/pycom-esp-idf/components/freertos/tasks.c:4872
  6    process 5         0x4009192e in vTaskExitCritical (mux=0x8484) at /Users/iwahdan/esp/pycom-esp-idf/components/freertos/tasks.c:4274
  5    process 4         xQueueCreateCountingSemaphoreStatic (uxMaxCount=1073468564, uxInitialCount=1073458080, pxStaticQueue=0x3ffbd4e0) at /Users/iwahdan/esp/pycom-esp-idf/components/freertos/queue.c:659
  4    process 3         0x40206db2 in API_vhci_host_check_send_available ()
  3    process 2         xQueueCreateCountingSemaphoreStatic (uxMaxCount=1073470132, uxInitialCount=0, pxStaticQueue=0x3ffbdb00) at /Users/iwahdan/esp/pycom-esp-idf/components/freertos/queue.c:659
  2    process 1         0x4009192e in vTaskExitCritical (mux=0x844a) at /Users/iwahdan/esp/pycom-esp-idf/components/freertos/tasks.c:4274
* 1    <main task>       0x4009192e in vTaskExitCritical (mux=0x844a) at /Users/iwahdan/esp/pycom-esp-idf/components/freertos/tasks.c:4274

        So, it seems to happen while performing lora_join within mods/modlora.c.

        // check for the correct lora radio mode
if (lora_obj.stack_mode != E_LORA_STACK_MODE_LORAWAN) {
    nlr_raise(mp_obj_new_exception_msg(&mp_type_OSError, mpexception_os_request_not_possible));
}

        I assume this is some synchronization issue wrt. the code is already doing other things.
        Maybe waiting for successfully joining the LoRaWAN network helps like outlined within [1] before doing other operations.

        Forget about my last words. I believe this is wrong as I've probably used the wrong application.elf file for decoding the core dump -- see next post(s).

        I just recognized you are using pure LoRa instead of LoRaWAN....

        @sita said in Guru Meditation Error:

        lora = LoRa(mode=LoRa.LORA, region=LoRa.EU868, frequency=433000000, power_mode=LoRa.ALWAYS_ON, tx_power=10, bandwidth=LoRa.BW_125KHZ, sf=8, preamble=8, coding_rate=LoRa.CODING_4_8)

        ... so who should be actually invoking lora_join anyway ;].

        With kind regards,
        Andreas.

        P.S.: To be safe that the core dump decoding gives us the correct results: Are you using lopy4-vanilla-dragonfly-onewire or lopy4-vanilla-dragonfly-onewire-i2s?

        A 1 Reply Last reply Reply Quote 0
        • A Offline
          andreas @sita
          last edited by

          What baffles me is that [1] shows:

          // check for the correct lora radio mode
if (lora_obj.stack_mode != E_LORA_STACK_MODE_LORAWAN) {
    nlr_raise(mp_obj_new_exception_msg(&mp_type_OSError, mpexception_os_request_not_possible));
}

          Drawing a conclusion from that, might it be that lora_join is not advisable when doing raw LoRa as outlined within your code

          @sita said in Guru Meditation Error:

          lora = LoRa(mode=LoRa.LORA, region=LoRa.EU868, frequency=433000000, power_mode=LoRa.ALWAYS_ON, tx_power=10, bandwidth=LoRa.BW_125KHZ, sf=8, preamble=8, coding_rate=LoRa.CODING_4_8)

          But who is actually invoking lora_join anyway?

          With kind regards,
          Andreas.

          [1] https://github.com/pycom/pycom-micropython-sigfox/blob/Dev/esp32/mods/modlora.c#L1841-L1844

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          • A Offline
            andreas @andreas
            last edited by andreas

            @andreas said in Guru Meditation Error:

            P.S.: To be safe that the core dump decoding gives us the correct results: Are you using lopy4-vanilla-dragonfly-onewire or lopy4-vanilla-dragonfly-onewire-i2s?

            I have to admit I didn't keep track of the application.elf files coming out of my builds which are required to properly decode the core dumps. May I humbly ask you to try again using LoPy4-1.20.1.r3-0.8.0-vanilla-squirrel.tar.gz?

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            • A Offline
              andreas
              last edited by andreas

              @andreas said in Guru Meditation Error:

              P.S.: To be safe that the core dump decoding gives us the correct results: Are you using lopy4-vanilla-dragonfly-onewire or lopy4-vanilla-dragonfly-onewire-i2s?

              I've tried to reproduce a corresponding application.elf file for the LoPy4-0.7.0-vanilla-dragonfly-modonewire-i2s firmware which shows the core dump is happening here:

              ==================== CURRENT THREAD STACK =====================
#0  0x4009192e in vTaskExitCritical (mux=0x844a) at /Users/iwahdan/esp/pycom-esp-idf/components/freertos/tasks.c:4274
#1  0x401124f0 in lora_bandwidth (n_args=<optimized out>, args=0x3ffc990c <lora_partial_rx_packet+12>) at mods/modlora.c:2117

              See also [1]. I believe this is also due to a erroneous core dump decoding, so nevermind.

              I have now kept the application.elf file for the new build LoPy4-1.20.1.r3-0.8.0-vanilla-squirrel.tar.gz. If you are able to catch another core dump when running this firmware, we would probably get correct results. Sorry for the extra mile.

              [1] https://github.com/pycom/pycom-micropython-sigfox/blob/Dev/esp32/mods/modlora.c#L2116-L2118

              S 3 Replies Last reply Reply Quote 0
              • A Offline
                andreas
                last edited by andreas

                Another attempt by trying to reproduce a corresponding application.elf file for the LoPy4-0.7.0-vanilla-dragonfly firmware without support for 1-Wire and I2S.

                ==================== CURRENT THREAD STACK =====================
#0  0x4009192e in prvAddNewTaskToReadyList (pxNewTCB=0x844a, xCoreID=1073476968, pxTaskCode=<optimized out>) at /Users/iwahdan/esp/pycom-esp-idf/components/freertos/tasks.c:1175
#1  0x401124f0 in ?? ()
Backtrace stopped: previous frame identical to this frame (corrupt stack?)

======================== THREADS INFO =========================
  Id   Target Id         Frame
  16   process 15        0x4000bff0 in ?? ()
  15   process 14        xQueueGenericSend (xQueue=0x3ffb2e50, pvItemToQueue=<optimized out>, xTicksToWait=4294967295, xCopyPosition=0) at /Users/iwahdan/esp/pycom-esp-idf/components/freertos/queue.c:780
  14   process 13        xQueueGenericSend (xQueue=0x3ffc3f0c <vflash_mem+1840>, pvItemToQueue=<optimized out>, xTicksToWait=4294967295, xCopyPosition=0) at /Users/iwahdan/esp/pycom-esp-idf/components/freertos/queue.c:780
  13   process 12        xQueueGenericSend (xQueue=0x3ffb75fc, pvItemToQueue=<optimized out>, xTicksToWait=4294967295, xCopyPosition=0) at /Users/iwahdan/esp/pycom-esp-idf/components/freertos/queue.c:780
  12   process 11        0x4000bff0 in ?? ()
  11   process 10        xQueueGenericSend (xQueue=0x3ffbac44, pvItemToQueue=<optimized out>, xTicksToWait=4294967295, xCopyPosition=0) at /Users/iwahdan/esp/pycom-esp-idf/components/freertos/queue.c:780
  10   process 9         xQueueGenericSend (xQueue=0x3ffb7bc8, pvItemToQueue=<optimized out>, xTicksToWait=4294967295, xCopyPosition=0) at /Users/iwahdan/esp/pycom-esp-idf/components/freertos/queue.c:780
  9    process 8         xQueueGenericSend (xQueue=0x3ffdab60, pvItemToQueue=<optimized out>, xTicksToWait=4294967295, xCopyPosition=0) at /Users/iwahdan/esp/pycom-esp-idf/components/freertos/queue.c:780
  8    process 7         0x4000bff0 in ?? ()
  7    process 6         0x40092b55 in vTaskNotifyGiveFromISR (xTaskToNotify=0x0, pxHigherPriorityTaskWoken=0x0) at /Users/iwahdan/esp/pycom-esp-idf/components/freertos/tasks.c:5044
  6    process 5         0x4009192e in prvAddNewTaskToReadyList (pxNewTCB=0x8484, xCoreID=1073476968, pxTaskCode=<optimized out>) at /Users/iwahdan/esp/pycom-esp-idf/components/freertos/tasks.c:1175
  5    process 4         xQueueGenericSend (xQueue=0x3ffbd494, pvItemToQueue=<optimized out>, xTicksToWait=100, xCopyPosition=0) at /Users/iwahdan/esp/pycom-esp-idf/components/freertos/queue.c:780
  4    process 3         0x40206db2 in littleFsErrorToErrno (littleFsError=393251) at littlefs/vfs_littlefs.c:175
  3    process 2         xQueueGenericSend (xQueue=0x3ffbdab4, pvItemToQueue=<optimized out>, xTicksToWait=4294967295, xCopyPosition=0) at /Users/iwahdan/esp/pycom-esp-idf/components/freertos/queue.c:780
  2    process 1         0x4009192e in prvAddNewTaskToReadyList (pxNewTCB=0x844a, xCoreID=1073476968, pxTaskCode=<optimized out>) at /Users/iwahdan/esp/pycom-esp-idf/components/freertos/tasks.c:1175
* 1    <main task>       0x4009192e in prvAddNewTaskToReadyList (pxNewTCB=0x844a, xCoreID=1073476968, pxTaskCode=<optimized out>) at /Users/iwahdan/esp/pycom-esp-idf/components/freertos/tasks.c:1175

                Looking at

                littleFsErrorToErrno (littleFsError=393251) at littlefs/vfs_littlefs.c:175

                here.

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                • A Offline
                  andreas @sita
                  last edited by andreas

                  @sita said in Guru Meditation Error:

                  while True:
  # 
  f = open('/sd/A_3001SF8.txt', 'a+')
  f.write(message)
  f.write(' ')
  f.write('\n')
  f.close()

                  Could you stop opening and closing the file within such a tight loop? You might want to time.sleep_ms() for at least some milliseconds between iterations. To be safe, try to use longer intervals first and get shorter if things might become more stable.

                  When being at it, you might also want to think about optimizing things using a single write call like f.write(message + ' \n').

                  S 1 Reply Last reply Reply Quote 0
                  • S Offline
                    sita @andreas
                    last edited by

                    Hello @andreas,

                    Thanks for the information. I kept time.sleep_ms(10) in the loop and will change f.write as you said.I will do the the experiment again and let you know if i got same again.
                    Thanks once again.

                    Have a nice day

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                    • S Offline
                      sita @andreas
                      last edited by

                      Hello @andreas ,

                      I have changed the firmware to LoPy4-1.20.1.r3-0.8.0-vanilla-squirrel.tar.gz. I will do the experiment again and let you know if i got same issue again.

                      Thanks once again & have a nice day

                      1 Reply Last reply Reply Quote 0
                      • S Offline
                        sita @andreas
                        last edited by

                        Hello @andreas ,

                        I have now flashed the latest firmware (LoPy4-1.20.1.r3-0.8.0-vanilla-squirrel.tar.gz). I got a new problem.When i try to upload my project, it gets struck while uploading the additional library files required. I attached the screenshot below.
                        As far i understood, it is trying to compress the library files before uploading and it gets struck with that. I haven't observed this phenomenon with earlier firmware versions. Please have a look

                        uploading compression.png

                        Thanks & Best regards,
                        Have a nice weekend

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                        • S Offline
                          sita @andreas
                          last edited by

                          Hello all,

                          I got an issue regarding uploading the project and connecting the port after updating new firmware LoPy4-1.20.1.r3-0.8.0-vanilla-squirrel.tar.gz, the respective problem screenshots shown in the below.

                          My doubt is, Is it related to new firmware update or any change in ATOM editor settings ??

                          Could anyone please suggest me how to resolve this problem ?

                          Uploading project (main folder)...
Safe booting device... (see settings for more info)
Safe boot failed, uploading anyway.
Upload failed: timeout. Please reboot your device manually.

                          Connecting to COM12...
Connection error: Error: timeout

                          Thanks in advance & Have a nice day

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                          • A Offline
                            andreas @sita
                            last edited by

                            Dear @sita,

                            sorry to hear that this didn't work out well. While I have to admit I haven't tested the firmware on a LoPy4 device, I just compiled it like any other Dragonfly builds I have done before.

                            I haven't seen the error you are observing anytime before.

                            So, to be better safe than sorry, downgrading to any other former release from [1] might help. If it doesn't you might want to downgrade to a regular release from Pycom using the regular firmware installer.

                            Sorry for the hassle!

                            With kind regards,
                            Andreas.

                            [1] https://packages.hiveeyes.org/hiveeyes/foss/pycom/vanilla/

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                            • S Offline
                              sita @andreas
                              last edited by

                              Hello @andreas ,

                              I have tested my devices all the versions in the [1] but in every version i observed the Guru meditation error. Is there any permanent solution for this problem ? It would be very helpful if i know exact reason behind issue ,if you know the reason could you please let me know..

                              Thanks in advance & have a nice day

                              [1] https://packages.hiveeyes.org/hiveeyes/foss/pycom/vanilla/

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                              • A Offline
                                andreas @sita
                                last edited by

                                Dear @sita,

                                just a short question: Have you been able to run your MicroPython program successfully with LoPy4-1.20.1.r3-0.8.0-vanilla-squirrel until the Guru Meditation error happened again? I am asking because it looked like you had other problems with this the other day.

                                With kind regards,
                                Andreas.

                                S 1 Reply Last reply Reply Quote 0
                                • S Offline
                                  sita @andreas
                                  last edited by

                                  Hello @andreas,

                                  The other problems are still there, for temporarily i am running [1] in cmd so that error not coming.

                                  [1]pycom-fwtool-cli.exe --verbose --port COM12 erase_all

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                                  • A Offline
                                    andreas @sita
                                    last edited by andreas

                                    Thanks. So, to make sure we are on the same page...

                                    • Invoking erase_all once before uploading a new firmware image is considered good practice. Thanks for letting me know.
                                    • After that, you are able to invoke your MicroPython program using the LoPy4-1.20.1.r3-0.8.0-vanilla-squirrel firmware?
                                    • However, Guru Meditation errors still occur?

                                    Now, are you able to submit another core dump when running this firmware build? I have saved a local copy of lopy4-0.8.0-vanilla-squirrel.elf on my workstation in order to decode core dumps produced by this build.

                                    S 1 Reply Last reply Reply Quote 0
                                    • S Offline
                                      sita @andreas
                                      last edited by

                                      @andreas Now i got an issue with the atom editor :( :(
                                      i have updated the ATOM editor evening and now i it is not showing REPL console. I will check with this and send you the core dump (LoPy4-1.20.1.r3-0.8.0-vanilla-squirrel).

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                                      • P Offline
                                        peterp
                                        last edited by

                                        @sita can you try again with 1.20.2.rc3

                                        @pigamonte same advice to you, but in case it doesn't solve it for you, I suggest to open your own thread. Otherwise we end up mixing different issues. Just because it shows a Guru Meditation Error, doesn't necessarily mean the issues are related.

                                        S 1 Reply Last reply Reply Quote 0
                                        • S Offline
                                          sita @peterp
                                          last edited by

                                          Hello @peterp,

                                          I have tried with new firmware version (1.20.2.rc3) but same error is coming again. I will open new thread to avoid mixing of different issues.

                                          Thanks & Have a nice day

                                          A 1 Reply Last reply Reply Quote 1
                                          • A Offline
                                            andreas @sita
                                            last edited by andreas

                                            Dear @sita,

                                            @sita said in Guru Meditation Error:

                                            I have tried with new firmware version (1.20.2.rc3) but same error is coming again.

                                            Either with the original Pycom's 1.20.2.rc3 and/or with the corresponding/updated LoPy4-1.20.2.rc3-0.8.0-vanilla-squirrel.tar.gz, I will be happy to receive respective core dumps. I have now kept the definitive .elf files around for decoding the core dumps appropriately.

                                            Thanks and with kind regards,
                                            Andreas.

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