Guru Meditation Error

[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?

[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

[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.

[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').

[sita]

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

[sita]

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

[sita]

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

Thanks & Best regards,
Have a nice weekend

[sita]

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

[andreas]

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/

[sita]

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/

[andreas]

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.

[sita]

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

[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.

[sita]

@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).

[peterp]

@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.

[sita]

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

[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.

[sita]

Hello @andreas ,

This is the core dump of the updated LoPy4-1.20.2.rc3-0.8.0-vanilla-squirrel.tar.gz

Guru Meditation Error: Core  1 panic'ed (IllegalInstruction). Exception was unhandled.
Memory dump at 0x4010abc8: 10180108 00000044 00000000
Core 1 register dump:
PC      : 0x4010abcf  PS      : 0x00060130  A0      : 0x801024b3  A1      : 0x3ffd8280
A2      : 0x3ffc93fc  A3      : 0x00000000  A4      : 0x3f94ef00  A5      : 0xffffff30
A6      : 0x3f9502b3  A7      : 0x00007e00  A8      : 0x40109f79  A9      : 0x3ffd8260
A10     : 0x3f40eed0  A11     : 0x00000000  A12     : 0x3f94ef04  A13     : 0x3f94ef08
A14     : 0x00000048  A15     : 0x400ff4ea  SAR     : 0x0000001e  EXCCAUSE: 0x00000000
EXCVADDR: 0x00000000  LBEG    : 0x40094de0  LEND    : 0x40094dfc  LCOUNT  : 0xffffffff

ELF file SHA256: 0000000000000000000000000000000000000000000000000000000000000000

Backtrace: 0x4010abcf:0x3ffd8280 0x401024b0:0x3ffd8320 0x400fe7c1:0x3ffd8350 0x400fe7ee:0x3ffd8370 0x400e208d:0x3ffd8390 0x400e231d:0x3ffd8430 0x400e0d81:0x3ffd8450

================= CORE DUMP START =================
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================= CORE DUMP END =================
Rebooting...
ets Jun  8 2016 00:22:57

rst:0xc (SW_CPU_RESET),boot:0x16 (SPI_FAST_FLASH_BOOT)
configsip: 0, SPIWP:0xee
clk_drv:0x00,q_drv:0x00,d_drv:0x00,cs0_drv:0x00,hd_drv:0x00,wp_drv:0x00
mode:DIO, clock div:1
load:0x3fff8020,len:8
load:0x3fff8028,len:2176
load:0x4009fa00,len:19740
entry 0x400a05bc

[andreas]

@sita said in Guru Meditation Error:

This is the core dump of the updated LoPy4-1.20.2.rc3-0.8.0-vanilla-squirrel.tar.gz

Thanks! Decoding this yields

==================== CURRENT THREAD STACK =====================
#0  mp_execute_bytecode (code_state=0x3f94eef0, inject_exc=0x0) at ../py/vm.c:1306
#1  0x401024b3 in fun_bc_call (self_in=<optimized out>, n_args=<optimized out>, n_kw=0, args=0x3ffd8280) at ../py/objfun.c:287
#2  0x400fe7c4 in mp_call_function_n_kw (fun_in=0x3f94ed60, n_args=0, n_kw=0, args=0x0) at ../py/runtime.c:624
#3  0x400fe7f1 in mp_call_function_0 (fun=0x3f94ed60) at ../py/runtime.c:598
#4  0x400e2090 in parse_compile_execute (source=0x3f94eda6, input_kind=MP_PARSE_FILE_INPUT, exec_flags=32) at ../lib/utils/pyexec.c:103
#5  0x400e2320 in pyexec_file (filename=0x3f94eda6 <error: Cannot access memory at address 0x3f94eda6>) at ../lib/utils/pyexec.c:550
#6  0x400e0d84 in TASK_Micropython (pvParameters=<optimized out>) at mptask.c:320

======================== THREADS INFO =========================
  Id   Target Id         Frame
  17   process 16        0x4000bff0 in ?? ()
  16   process 15        0x400966b0 in xQueueGenericReceive (xQueue=0x3ffc4044 <s_timer_semaphore_memory>, pvBuffer=0x0, xTicksToWait=4294967295, xJustPeeking=0) at /home/gezahusi/Work/Repositories/pycom-esp-idf/components/freertos/queue.c:1592
  15   process 14        0x400966b0 in xQueueGenericReceive (xQueue=0x3ffb2e50, pvBuffer=0x3ffb42a0, xTicksToWait=4294967295, xJustPeeking=0) at /home/gezahusi/Work/Repositories/pycom-esp-idf/components/freertos/queue.c:1592
  14   process 13        0x400966b0 in xQueueGenericReceive (xQueue=0x3ffb760c, pvBuffer=0x0, xTicksToWait=4294967295, xJustPeeking=0) at /home/gezahusi/Work/Repositories/pycom-esp-idf/components/freertos/queue.c:1592
  13   process 12        0x4000bff0 in ?? ()
  12   process 11        0x400966b0 in xQueueGenericReceive (xQueue=0x3ffbd338, pvBuffer=0x3ffd91d0, xTicksToWait=4294967295, xJustPeeking=0) at /home/gezahusi/Work/Repositories/pycom-esp-idf/components/freertos/queue.c:1592
  11   process 10        0x400966b0 in xQueueGenericReceive (xQueue=0x3ffb7bd8, pvBuffer=0x0, xTicksToWait=4294967295, xJustPeeking=0) at /home/gezahusi/Work/Repositories/pycom-esp-idf/components/freertos/queue.c:1592
  10   process 9         0x400966b0 in xQueueGenericReceive (xQueue=0x3ffdb290, pvBuffer=0x3ffdeab0, xTicksToWait=4294967295, xJustPeeking=0) at /home/gezahusi/Work/Repositories/pycom-esp-idf/components/freertos/queue.c:1592
  9    process 8         0x4000bff0 in ?? ()
  8    process 7         /builds/idf/crosstool-NG/.build/src/gdb-7.10/gdb/inline-frame.c:171: internal-error: inline_frame_this_id: Assertion `!frame_id_eq (*this_id, outer_frame_id)' failed.

So, the core dump seems to happen right away after system start while executing the Python file

pyexec_file (filename=0x3f94eda6 <error: Cannot access memory at address 0x3f94eda6>) at ../lib/utils/pyexec.c:550

I have never seen that before! The file might be corrupted somehow.

• Is this the core dump which is happening immediately after uploading the MicroPython file to the system?
• Can you get another core dump which is coming from the system after a short run time i.e. after hitting the reset button?
• Can you show your current MicroPython code again?
• You might also want to try yet another erase_all [1] / erase_flash procedure first.

[1] Please don't miss the corresponding installation notes when invoking erase_all on LoPy devices.

[andreas]

@andreas said in Guru Meditation Error:

Can you show your current MicroPython code again?

Regarding the MicroPython code, I would suggest trying to invoke your program without any interaction on the filesystem and see whether it still crashes.