ESP32-S3 JLink JTAG
Posted: Sun Jul 03, 2022 4:04 pm
Hi
Has anyone successfully got an ESP32-S3 debugged using a JLink debugger? I've been trying to establish a connection to my ESP32-S3-DevKitM for the last 4h and this is starting to get really annoying.
I've red the documentation which says to burn eFuse DIS_USB_JTAG. Apparently this should disable the internal USB JTAG and enable JTAG on GPIO39-GPIO42. So far so good. Yet, I couldn't connect.
I've later also burned DIS_USB_SERIAL_JTAG and hopefully not disabled JTAG altogether. Still, no success.
So here's what my OpenOCD output currently looks like:
According to some forum posts this error is supposed to be a "bad contact" or wrongly wired cable. After 4 hours of swapping and re-checking things I can say, no, it's not. Also my program doesn't reconfigure any GPIO pins at all. It's basically the hello_world example except it doesn't reboot after 10s.
Trying to connect anyhow (despite the errors above) doesn't work either:
Any suggestions?
Has anyone successfully got an ESP32-S3 debugged using a JLink debugger? I've been trying to establish a connection to my ESP32-S3-DevKitM for the last 4h and this is starting to get really annoying.
I've red the documentation which says to burn eFuse DIS_USB_JTAG. Apparently this should disable the internal USB JTAG and enable JTAG on GPIO39-GPIO42. So far so good. Yet, I couldn't connect.
I've later also burned DIS_USB_SERIAL_JTAG and hopefully not disabled JTAG altogether. Still, no success.
So here's what my OpenOCD output currently looks like:
Code: Select all
❯ bin/openocd -c "adapter speed 1000" -s share/openocd/scripts -f interface/jlink.cfg -f target/esp32s3.cfg
Open On-Chip Debugger v0.11.0-esp32-20220411 (2022-04-11-08:47)
Licensed under GNU GPL v2
For bug reports, read
http://openocd.org/doc/doxygen/bugs.html
adapter speed: 1000 kHz
Info : Listening on port 6666 for tcl connections
Info : Listening on port 4444 for telnet connections
Info : J-Link V10 compiled Nov 2 2021 12:14:50
Info : Hardware version: 10.10
Info : VTarget = 3.296 V
Info : clock speed 1000 kHz
Error: JTAG scan chain interrogation failed: all ones
Error: Check JTAG interface, timings, target power, etc.
Error: Trying to use configured scan chain anyway...
Error: esp32s3.cpu0: IR capture error; saw 0x1f not 0x01
Warn : Bypassing JTAG setup events due to errors
Warn : target esp32s3.cpu0 examination failed
Info : esp32s3.cpu1: Debug controller was reset.
Info : esp32s3.cpu1: Core was reset.
Info : starting gdb server for esp32s3.cpu0 on 3333
Info : Listening on port 3333 for gdb connectionsTrying to connect anyhow (despite the errors above) doesn't work either:
Code: Select all
Error: Target not examined yet
Error executing event gdb-attach on target esp32s3.cpu0:
Warn : No symbols for FreeRTOS!
Error: Target not halted
Error: auto_probe failed
Error: Connect failed. Consider setting up a gdb-attach event for the target to prepare target for GDB connect, or use 'gdb_memory_map disable'.
Error: attempted 'gdb' connection rejected