Configure ESP32-C3 built-in JTAG Interface
ESP32-C3 has a built-in JTAG circuitry and can be debugged without any additional chip. Only an USB cable connected to the D+/D- pins is necessary. The necessary connections are shown in the following section.
Configure Hardware
ESP32-C3 Pin |
USB Signal |
|---|---|
GPIO18 |
D- |
GPIO19 |
D+ |
5V |
V_BUS |
GND |
Ground |
Please verify that the ESP32-C3 pins used for USB communication are not connected to some other HW that may disturb the JTAG operation.
Configure USB Drivers
JTAG communication should work on all supported platforms. Windows users might get LIBUSB_ERROR_NOT_FOUND errors. Please use version 2.8 (or newer) of the ESP-IDF Tools Installer and select the driver “Espressif - WinUSB support for JTAG (ESP32-C3/S3)” in order to resolve this issue. If you don’t want to re-run the installer then the same can be achieved with idf-env by running the following command from PowerShell:
Invoke-WebRequest 'https://dl.espressif.com/dl/idf-env/idf-env.exe' -OutFile .\idf-env.exe; .\idf-env.exe driver install --espressif
On Linux adding OpenOCD udev rules is required and is done by placing the following udev rules file in the /etc/udev/rules.d folder.