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  4. Open-Source FTDI FT2232 JTAG and UART Adapter Board

Open-Source FTDI FT2232 JTAG and UART Adapter Board

Learn more about the open-source FTDI FT 2232 JTAG and UART adapter board.

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Erich Styger user avatar
Erich Styger
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Nov. 15, 19 · Tutorial
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Open Source FTDI FT2232 JTAG and UART Adapter board

Learn more about the open-source FTDI FT 2232 JTAG and UART adapter board.

In JTAG Debugging the ESP32 with FT2232 and OpenOCD, I used an FTDI FT2232 breakout board to JTAG debug with OpenOCD. With an adapter board on top of the TDI FT2232, the wiring is much easier and simpler to use:

JTAG Debugging the ESP32 with FT2232

JTAG Debugging the ESP32 with FT2232

FT2232 JTAG UART PCB

FT2232 JTAG UART PCB

The wiring includes a JTAG header with pull-up and pull-down, plus a UART header:

FT2232 JTAG UART Board

FT2232 JTAG UART Board

The board hooks on the FTDI breakout board and makes a debug and UART connection to the target board:

JTAG Debugging the ESP32 with FT2232

JTAG Debugging the ESP32 with FT2232

The KiCAD project and files are available on the GitHub site noted in the following links section.

Happy Debugging!

Links

  • JTAG Debugging the ESP32 with FT2232 and OpenOCD
  • Project KiCAD files on GitHub
Open source

Published at DZone with permission of Erich Styger. See the original article here.

Opinions expressed by DZone contributors are their own.

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  • The 2026 Observability Audit: Separating Single Vendor Silos From Community Innovation
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  • Open Source as a Leadership Lab for Software Engineers

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