how to enable ETM Trace

[mete]

Hello,

I am using STM32F4 (nucleo F439ZI), so Cortex-M4. I am trying to enable ETM tracing and see something on TRACE pins, I am using STLINK for SWD and observing TRACE pins with an oscilloscope. I enable the trace pins on pin configuration, and enable -I think- trace related things in debug regs and then tried various things with ETM regs but I cannot see any output from TRACE pins. Is there any hint or a guide to do this ?

Thanks.

Mete

[Tesla DeLorean]

The register configuration is shown here, may have other debugger side dependencies. Probably want the technical materials from ARM for debugger writers.

https://community.st.com/s/question/0D50X0000BIzlEKSQZ/i-have-trouble-getting-etm-instruction-trace-out-of-stm32f411ve

[mete · Accepted solution]

I realized even if I select trace output for GPIOs in STM32CubeMX configuration, the pins were not initialized as such in the autogenerated code. So initializing them manually solved the isse.