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aws / amazon-freertos

DEPRECATED - See README.md
https://aws.amazon.com/freertos/
MIT License
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Add support for ESP32-S2 USB CDC to use serial console #3444

Closed findmyname666 closed 2 years ago

findmyname666 commented 2 years ago

I cannot flash esp32-s2 without failure. Here is the log from idf.py -p /dev/ttyACM0 flash:

Writing at 0x000d5b31... (97 %)
Writing at 0x000d6562... (98 %)
Writing at 0x000d6f4e... (98 %)
Writing at 0x000d7a42... (99 %)
Writing at 0x000d86d5... (99 %)
Writing at 0x000d944b... (100 %)
Wrote 760864 bytes (494876 compressed) at 0x00020000 in 7.4 seconds (effective 825.3 kbit/s)...
Hash of data verified.

Leaving...
Hard resetting via RTS pin...
ERROR: ESP32-S2 chip was placed into download mode using GPIO0.
esptool.py can not exit the download mode over USB. To run the app, reset the chip manually.
To suppress this error, set --after option to 'no_reset'.
CMake Error at run_cmd.cmake:14 (message):
  esptool.py failed
Call Stack (most recent call first):
  run_esptool.cmake:21 (include)

FAILED: CMakeFiles/flash 
cd /home/findmyname/Documents/iot/aws/amazon-freertos/vendors/espressif/esp-idf/components/esptool_py && /usr/bin/cmake -D IDF_PATH="/home/findmyname/Documents/iot/aws/amazon-freertos/vendors/espressif/esp-idf" -D ESPTOOLPY="/home/findmyname/.espressif_aws/python_env/idf4.2_py3.9_env/bin/python /home/findmyname/Documents/iot/aws/amazon-freertos/vendors/espressif/esp-idf/components/esptool_py/esptool/esptool.py --chip esp32s2" -D ESPTOOL_ARGS="--before=default_reset --after=hard_reset write_flash @flash_args" -D WORKING_DIRECTORY="/home/findmyname/Documents/iot/aws/amazon-freertos/build" -P /home/findmyname/Documents/iot/aws/amazon-freertos/vendors/espressif/esp-idf/components/esptool_py/run_esptool.cmake
ninja: build stopped: subcommand failed.
ninja failed with exit code 1

After manual reset the "test" app seems to run. So far I'm unable to use monitor command.

This can be solved by adding support for USB Communication Device Class (CDC) to implement the serial console. Here is the ESP documentation with more details. However this seems to be documented only for v4.3 so I'm not sure if that works for v4.2. I actually used it in v4.3 and it works!

P.S.: I'm not really expert either in electronics and / or esp-idf build system so I cannot help or provided more technical details.

Thx

alfred2g commented 2 years ago

Thanks for reporting, we will be looking at this shortly

dachalco commented 2 years ago

Hi @findmyname666

Exactly which esp32-s2 board are you using (eg. esp32-s2-saola, esp32-s2-devkitc, etc.)? It's typically printed on the PCB if you're unsure.

findmyname666 commented 2 years ago

Hi @dachalco @alfred2g ,

Thanks for feedback.

I'm using these Olimex boards (ESP32-S2-DevKit-Lipo-USB) which are compatible with esp32-s2-saola-1.

BR

dachalco commented 2 years ago

Hi @findmyname666

USB support should already be provided by esp-idf. We should be updating our IDF version to v4.3 soon, afte which these errors won't pop up. In the meantime, it appears you're at least able to flash the application. As for monitoring, instead of using idf.py monitor you can use another usb serial monitoring program such as teraterm, serial, minicom, etc. to monitor the device UART output. If alternative serial monitoring does not work, please re-open the ticket.