8000 microcontroller.reset() to bootloader on esp32-s2 · Issue #3884 · adafruit/circuitpython · GitHub
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FoamyGuy opened this issue Dec 27, 2020 · 8 comments · Fixed by #4925
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microcontroller.reset() to bootloader on esp32-s2 #3884

FoamyGuy opened this issue Dec 27, 2020 · 8 comments · Fixed by #4925
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@microdev1
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bug espressif applies to multiple Espressif chips
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7.0.0

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@FoamyGuy
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FoamyGuy commented Dec 27, 2020 •
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Running these commands in REPL my device is rebooting into standard mode coming up as a CIRCUITPY drive.

import microcontroller
microcontroller.on_next_reset(microcontroller.RunMode.BOOTLOADER)
microcontroller.reset()

Tested on:

Adafruit CircuitPython 6.1.0-beta.2-182-g1b7fbaf31 on 2020-12-26; Adafruit MagTag with ESP32S2

and

Adafruit CircuitPython 6.1.0-beta.2-30-g6cced4940 on 2020-12-13; FeatherS2 with ESP32S2

I have previously followed the process to have UF2 combo bootloader on my devices.
@microdev1
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microcontroller.RunMode.BOOTLOADER isn't implemented on the esp32s2.

circuitpython/ports/esp32s2/common-hal/microcontroller/__init__.c

Lines 70 to 73 in 1b7fbaf

void common_hal_mcu_on_next_reset(mcu_runmode_t runmode) {
if(runmode == RUNMODE_SAFE_MODE)
safe_mode_on_next_reset(PROGRAMMATIC_SAFE_MODE);
}

I don't think it is possible to enter DFU (first-stage) bootloader on esp32s2 from software.
I tried to get reset to UF2 bootloader working but I am facing a strange issue #3813.

@ladyada
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ladyada commented Dec 27, 2020

there is some way to enter the DFU bootloader from usercode because arduino does it...
@me-no-dev do you have any hints we could use to implement? :)

@me-no-dev
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@ladyada here is the shutdown handler that does the reboot into the proper mode: https://github.com/espressif/arduino-esp32/blob/idf-release/v4.2/cores/esp32/esp32-hal-tinyusb.c#L458-L479

it is registered here: https://github.com/espressif/arduino-esp32/blob/idf-release/v4.2/cores/esp32/esp32-hal-tinyusb.c#L531

Let me know if this does not help :)

@microdev1
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Thanks! @me-no-dev, this works... the changes are in my update-run-mode branch. :)

@tannewt tannewt added bug espressif applies to multiple Espressif chips labels Dec 28, 2020
@tannewt tannewt added this to the 6.x.x - Bug Fixes milestone Dec 28, 2020
@dheera dheera mentioned this issue Jan 13, 2021
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@dhalbert
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Thanks! @me-no-dev, this works... the changes are in my update-run-mode branch. :)

@microdev1 Could you make your changes into a PR?

@dhalbert dhalbert modified the milestones: 6.x.x - Bug Fixes, 7.0.0 Mar 31, 2021
@microdev1
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@microdev1 Could you make your changes into a PR?

This is stuck due to idf@v4.2. In my implementation, the function calls used to achieve this are part of idf@v4.3.

@ThomasAtBBTF
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I just want to point out, that I am very interested that this feature will work in the not to distance future,

@dhalbert dhalbert mentioned this issue May 15, 2021
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@microdev1 microdev1 mentioned this issue Jun 25, 2021
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@dhalbert
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This should be fixed now, with the latest merge, and also with the latest TinyUF2. Update your TinyUF2 bootloader to at least 0.5.0, following the instructions here: https://learn.adafruit.com/adafruit-magtag/install-uf2-bootloader

@ehagerty ehagerty mentioned this issue Mar 20, 2023
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Add RunMode.UF2 and update esp32s2 run-modes
7 participants
@tannewt @ladyada @FoamyGuy @dhalbert @me-no-dev @ThomasAtBBTF @microdev1
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