FreeRTOS - Debugging and Monitoring
After integrating trace hooks, no events appear in the FreeRTOS+Trace viewer. What is the most probable reason?
After integrating trace hooks, no events appear in the FreeRTOS+Trace viewer. What is the most probable reason?
medium📝 Debug Q6 of 15
Step-by-Step Solution
Solution:
Step 1: Check configuration
Trace hooks require configUSE_TRACE_HOOKS to be enabled in FreeRTOSConfig.h.Step 2: Consider other options
While an outdated viewer or scheduler not started can cause issues, the most common cause is missing configUSE_TRACE_HOOKS.Step 3: Buffer size is unrelated to no data
Too large buffer size does not prevent data from appearing.Final Answer:
Trace hooks were added but configUSE_TRACE_HOOKS is not enabled -> Option DQuick Check:
Verify configUSE_TRACE_HOOKS is set to 1 [OK]
Quick Trick: Enable configUSE_TRACE_HOOKS to see trace data [OK]
Common Mistakes:
- Assuming viewer software is always the cause
- Forgetting to enable trace hooks in config
- Not starting the scheduler before tracing
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