Add support for ESP32 in firmware installer

[nitin710]

Description

• Add support for ESP32 in firmware installer

Useful links

• Get board info programmatically - Using Arduino / Programming Questions - Arduino Forum: https://forum.arduino.cc/t/get-board-info-programmatically/557897
• 7 Ways to Identify Which Arduino Board You Have – Chip Wired: https://chipwired.com/identify-arduino-board/
• serial - How does Arduino IDE 'Get Board Info'? - Arduino Stack Exchange: https://arduino.stackexchange.com/questions/39137/how-does-arduino-ide-get-board-info
• ofxSerial/SerialDeviceUtils.h at master · bakercp/ofxSerial: https://github.com/bakercp/ofxSerial/blob/master/libs/ofxSerial/include/ofx/IO/SerialDeviceUtils.h
  • Utility in Openframeworks to get PID and VID
  • PID and VID are stored in the device description.
  • It can be retrieved by parsing the device description
• Adafruit customer service forums • View topic - USB VID/PID list: https://forums.adafruit.com/viewtopic.php?f=19&t=161033#wrap

Proposed solution

• Find the VID (Vendor ID) and PID (Product ID) using ofxSerial. Example
• Feather M0 has 3 PIDs in the boards.txt file (mentioned in the forum thread above. Below are the VID/PID for Feather M0.

  VID: 239A
  PID: 800B

• If the PID does not match with the existing list, the Device is considered to be ESP.
  • We may also choose to filter based on VID/PID for ESP32. however, It still needs to be confirmed if extra drivers are needed to communicate with ESP32.

[nitin710]

boards.txt from the adafruit boards package

# Adafruit Feather M0 (SAMD21)
# ------------------------------
adafruit_feather_m0.name=Adafruit Feather M0
adafruit_feather_m0.vid.0=0x239A
adafruit_feather_m0.pid.0=0x800B
adafruit_feather_m0.vid.1=0x239A
adafruit_feather_m0.pid.1=0x000B
adafruit_feather_m0.vid.2=0x239A
adafruit_feather_m0.pid.2=0x0015

[nitin710]

Tested:

• On macOS, CP210x drivers are required to detect ESP32
  • After installing the drivers, ESP32 shows up on arduino, but trying Tools > Get Board Info does not show any info. Instead, Arduino shows a message stating "Native USB port. cannot obtain information"
• On linux, ESP32 is detected as a possible COM port without any drivers.
  • Feather M0 shows up as /dev/ttyACM0
  • ESP32 shows up as /dev/ttyUSB0

[nitin710]

Feather M0 in normal mode

Feather M0 in bootloader mode

Notice

• COM port changes as expected
• The VID remains the same, but the PID changes

[nitin710]

For ESP

[nitin710]

The ESP32 feather has CP2104 driver, which is responsible for UART comms. From primary testing (and then verification using design files), it looks like the CP2104 is always powered ON, as long at teh USB is connected. This means that pressing the RESET button will not toggle the CP2104 on->off->on, for detection by firmware installer. We need probably need to change the standard flow to detect a feather in firmware installer.

[nitin710]

Tested working with ESP on Windows

Tests

• ✔️ Tested with a bare ESP plugged in
• ✔️ Tested with ESP stacked on the EmotiBit
• ✔️ Tested with a long delay between feather bootup in plugging in
  • With EmotiBit FW already running on the ESP