Flash the ESP32 side of my DVID

Setup

You need to install the tool esptool.py:

pip install esptool
esptool.py -h

Mapping

Regarding the firmware, following parts are available :

  • 0x1000 : bootloader
  • 0x8000 : partitions
  • 0x10000 : firmware

Run

In order to flash the firmware, you need to process following steps: 1. Connect the "UART" header of the board to your computer via a USB-UART bridge

UART Dongle Connected ESP32

  1. Power up the board (connect the UART dongle to your computer)

  2. Press and hold the "BTLD CORE" button

ESP32 BTLD Core

  1. Press, then release the "RESET" button

ESP32 Reset

  1. Release the "BTLD CORE" button

  2. Execute the flash command

esptool.py --port /dev/ttyUSB0 --baud 115200 --chip esp32 write_flash 0x10000 ./firmware.esp32

Execution trace :

esptool.py v4.6.2
Serial port /dev/ttyUSB0
Connecting........
Chip is ESP32-D0WD-V3 (revision v3.1)
Features: WiFi, BT, Dual Core, 240MHz, VRef calibration in efuse, Coding Scheme None
Crystal is 40MHz
MAC: 94:54:c5:d8:23:58
Uploading stub...
Running stub...
Stub running...
Configuring flash size...
Flash will be erased from 0x00000000 to 0x003fffff...
Compressed 4194304 bytes to 191559...
Wrote 4194304 bytes (191559 compressed) at 0x00000000 in 29.8 seconds (effective 1124.6 kbit/s)...
Hash of data verified.

Leaving...
Hard resetting via RTS pin...

You can now press the reset button to restart the training, something should appear on the screen.

Recrue

esptool.py --port /dev/ttyUSB0 --baud 115200 --chip esp32 write_flash 0x1000 bootloader.bin 0x8000 esp32_parititons.bin 0x10000 ./[FIRMWARE]
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