Hi
I'm using a Nucleo STM32L552 an want to use my segger JTAG; I've wired CN5 on the dev board to my JLINK (with the exception of pin 1 for VDD; I hooked that directly to the 3.3V pin in the arduino header) and I'm not able to connect my device to the uC. The Segger software is able to identify the uC by model number and the reset line is clearly connected when it tries to reset the MCU the MCU pretty clearly resets but it's not able to talk to the Jlink.
Any ideas?
Connecting ...
- Connecting via USB to probe/ programmer device 0
- Probe/ Programmer firmware: J-Link Pro V4 compiled Sep 22 2022 15:00:37
- Probe/ Programmer S/N:
- Device "STM32L552ZE" selected.
- InitTarget() start
- SWD selected. Executing JTAG -> SWD switching sequence.
- DAP initialized successfully.
- Can not attach to CPU. Trying connect under reset.
- SWD selected. Executing JTAG -> SWD switching sequence.
- DAP initialized successfully.
- Connecting to CPU via connect under reset failed.
- InitTarget() end - Took 1.12s
- InitTarget() start
- SWD selected. Executing JTAG -> SWD switching sequence.
- DAP initialized successfully.
- Can not attach to CPU. Trying connect under reset.
- SWD selected. Executing JTAG -> SWD switching sequence.
- DAP initialized successfully.
- Connecting to CPU via connect under reset failed.
- InitTarget() end - Took 1.12s
- Target interface speed: 200 kHz (Auto)
- VTarget = 3.324V
- InitTarget() start
- SWD selected. Executing JTAG -> SWD switching sequence.
- DAP initialized successfully.
- Can not attach to CPU. Trying connect under reset.
- SWD selected. Executing JTAG -> SWD switching sequence.
- DAP initialized successfully.
- Connecting to CPU via connect under reset failed.
- InitTarget() end - Took 1.11s
- InitTarget() start
- SWD selected. Executing JTAG -> SWD switching sequence.
- DAP initialized successfully.
- Can not attach to CPU. Trying connect under reset.
- SWD selected. Executing JTAG -> SWD switching sequence.
- DAP initialized successfully.
- Connecting to CPU via connect under reset failed.
- InitTarget() end - Took 1.11s
- ERROR: Failed to connect.
Could not establish a connection to target.
Also - I can't seem to get the onboard STlink working (isn't initializing as USB in my system) but typically prefer to use my JLINK anyway but will try figure out what's going on with my STLink in the mean time
