Default ISR in Cypress PSoC 5LP - ARM Cortex M3

[thexeno]

Hi guys,

I just started with the PSoC 5LP. The utility from Cypress let me use and assign any kind of interrupt fairly easily.
Maybe I am not a fan of full fledged GUI approach, because I have a development style which never rely on auto-generated code, I guess I have to change now.

So the problem is that I would like to assign all the unused IVT entries to my handler for unused ISR. I found my self a bit in difficulties for two reasons:

1. I am new to ARM architectures, so I would like to know what is the good approach when dealing with custom default ISR
2. I am not confident in manually changing the table, as there is a lot of autogenerated code

So I asked to Cypress forum, but I gave up as I got answers like the fact that if I don't use the interrupt then it never fires - or the default ISR (which is an infinite loop). This does not smell good to me.

Is anyone else who ever tried to re-assign the default ISR in the IVT of an ARM? Is this really absurd what I am trying to do?

Thanks to all!

[Brutte]

I guess I have to change now.

I cannot help you with Cypress IDE.
Finding a default ISR is quite easy when you look at the source code (GCC).

But I have already commented the IMHO futile effort in mastering wizards.
Wizarding works only when you do not need to ask questions (when you are a professionalist that can already do the job not looking at the screen). If you are a noob and you hit any problem - you are  with no clue what went wrong.

My solution:

• either use wizarding but limit yourself to "blinking an LED" (no customization)
• or do it properly by using a wizard just as a reference and write/review the code with full understanding what is going on there.

[SomeElectronicsEngineer]

See cm3start.c:
* define CY_BOOT_INT_DEFAULT_HANDLER_EXCEPTION_ENTRY_CALLBACK in cyapicallbacks.h
* declare CyBoot_IntDefaultHandler_Exception_EntryCallback in cyapicallbacks.h
* implement CyBoot_IntDefaultHandler_Exception_EntryCallback wherever you like.

[thexeno]

Thanks to all.

See cm3start.c:
* define CY_BOOT_INT_DEFAULT_HANDLER_EXCEPTION_ENTRY_CALLBACK in cyapicallbacks.h
* declare CyBoot_IntDefaultHandler_Exception_EntryCallback in cyapicallbacks.h
* implement CyBoot_IntDefaultHandler_Exception_EntryCallback wherever you like.

That was what I wildly guessed, but I was not sure if was conflicting with the GUI part. Is working as I needed. Thank you!