trax_start_trace() function
Start a Trax trace on the current CPU
Arguments
units_until_stop
Set the units of the delay that gets passed to trax_trigger_traceend_after_delay. One of TRAX_DOWNCOUNT_WORDS or TRAX_DOWNCOUNT_INSTRUCTIONS.
Return value
esp_err_t. Fails with ESP_ERR_NO_MEM if Trax is disabled.