microcontroller.reset() to bootloader on esp32-s2

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.

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.

@me-no-dev

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? :)

@ladyada

@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 :)

@me-no-dev

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

@me-no-dev

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

@microdev1 Could you make your changes into a PR?

@microdev1

@microdev1 Could you make your changes into a PR?

This is stuck due to [email protected]. In my implementation, the function calls used to achieve this are part of [email protected].

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

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

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microcontroller.reset() to bootloader on esp32-s2 #3884

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

microcontroller.reset() to bootloader on esp32-s2 #3884

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microdev1 commented on Dec 27, 2020

ladyada commented on Dec 27, 2020

me-no-dev commented on Dec 28, 2020

microdev1 commented on Dec 28, 2020

dhalbert commented on Mar 31, 2021

microdev1 commented on Apr 1, 2021

ThomasAtBBTF commented on Apr 16, 2021

dhalbert commented on Jul 19, 2021

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