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esp32 OSError: [Errno 2] ENOENT #4439

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sunbearc22 opened this issue Jan 29, 2019 · 3 comments
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esp32 OSError: [Errno 2] ENOENT #4439

sunbearc22 opened this issue Jan 29, 2019 · 3 comments
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port-esp32

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@sunbearc22
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On an espressif esp32 devkit v1 board, I tried a soft reboot Ctrl+D and a hard reboot by pressing EN button. Their output are shown below. I had accessed the repl via picocom /dev/ttyUSB0 -b115200. My questions are:

  1. What is OSError: [Errno 2] ENOENT? The closes previous issue I came across is this. After running picocom command, I did experience no respond from keyboard (as if the system hang). I pressed the EN button and the repl appeared thereafter.
  2. cpu_start: Single core mode. The esp32 has dual core. Is there a Dual core mode?
>>> 
PYB: soft reboot
OSError: [Errno 2] ENOENT
MicroPython v1.9.4-788-gf874e8184 on 2019-01-25; ESP32 module with ESP32
Type "help()" for more information.
>>> ets Jun  8 2016 00:22:57

rst:0x1 (POWERON_RESET),boot:0x13 (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:2
load:0x3fff0018,len:4
load:0x3fff001c,len:4732
load:0x40078000,len:7496
load:0x40080400,len:5512
entry 0x4008114c
I (411) cpu_start: Pro cpu up.
I (411) cpu_start: Single core mode
I (411) heap_init: Initializing. RAM available for dynamic allocation:
I (414) heap_init: At 3FFAE6E0 len 00001920 (6 KiB): DRAM
I (420) heap_init: At 3FFC0E38 len 0001F1C8 (124 KiB): DRAM
I (427) heap_init: At 3FFE0440 len 00003BC0 (14 KiB): D/IRAM
I (433) heap_init: At 3FFE4350 len 0001BCB0 (111 KiB): D/IRAM
I (440) heap_init: At 400915EC len 0000EA14 (58 KiB): IRAM
I (446) cpu_start: Pro cpu start user code
I (16) cpu_start: Starting scheduler on PRO CPU.
OSError: [Errno 2] ENOENT
MicroPython v1.9.4-788-gf874e8184 on 2019-01-25; ESP32 module with ESP32
Type "help()" for more information.
>>>
@dpgeorge
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OSError: [Errno 2] ENOENT

As you found out in that link, this does mean that "main.py" was not found on the filesystem. It's a harmless error (unless you did want it to actually execute main.py).

The esp32 has dual core. Is there a Dual core mode?

Dual core is not currently supported by MicroPython.

@pfalcon
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pfalcon commented Jan 29, 2019

As you found out in that link, this does mean that "main.py" was not found on the filesystem. It's a harmless error (unless you did want it to actually execute main.py).

I think this really should be fixed now, as it has become a true FAQ. (And I already said that a point that it should have been fixed "now" was a couple of years ago, but caved in then.)

@sunbearc22
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:) Thanks.

@zyioump zyioump mentioned this issue Feb 9, 2019
Open
tannewt pushed a commit to tannewt/circuitpython that referenced this issue Mar 22, 2021
@dhalbert
Merge pull request micropython#4439 from dhalbert/adafruit_funhouse
0615876 
Adafruit funhouse
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@pfalcon @dpgeorge @sunbearc22