Undocumented: UART Direct Access Event Handler = IRQ?

[awneil]

@I

@awneil

… IRQ Traces come on different “flows” to the main application … the “flows” are:
ADL - for the main application - as usual;
LLH - for the Low-Level Handler;
HLH - for the High-Level handler.

The LLH flow also seems to be used by any TRACE in the Event Handlers in the UART Direct Access service - but this does not seem to be documented anywhere?
viewtopic.php?f=21&t=3462&p=18233&hilit=LLH#p18233

Does this mean that UART Direct Access Event Handlers are actually Low-Level IRQ handlers and, therefore, that all the usual Low-Level IRQ restrictions apply?

Again, I can’t see this documened anywhere…

[awneil]

@awneil

Does this mean that UART Direct Access Event Handlers are actually Low-Level IRQ handlers

Yes, that does appear to be the case - adl_ctxGetID() returns ADL_CTX_LOW_LEVEL_IRQ_HANDLER

I can’t see this documened anywhere

This really needs to be documented - as there are specific issues that need to be considered when writing low-level IRQ handlers!