CPP project with RTC ISR functions - Issue

[anand-k]

We are using FRDM-KL25 board for our prototype developement. I created a C proejct in CW IDE 10.3 for RTC. I created the entire project in C first. RTC interrupts were handled by ISR routines in IVT. This was successful with all functionalities working. But now am trying to migrate this C code to CPP code. I created a class RTC and moved all my functions into it.

I didnt move the ISR function void __attribute__ ((interrupt)) RTC_Interrupt(void) into the class. When I moved it into the class, it is showing  error "RTC_Interrupt was not declared in this scope". Please find my snapshots.

Could anyone suggest me on how to move RTC ISR functions within the Class.? or how make reference of the ISR function in the class in the Interrupt Vector Table?

[kai_liu]

Hi, Anand,

Any update? I want a working CPP demo on FRDM-KL25Z. But I want to use ARM GCC Embedded to build it. I have posted my thread on Re: Any G++ CPP demo project running on KL?

Allan K Liu

[Monica]

Anand, how is the project going?

Keep us posted, we'd like to know :smileywink:

Best regards.

[JimDon]

The function must be static, put perhaps that is what RTC_ISR macro does.

Because it is static, it can only reference static members of the class OR you need have a global singleton object that the ISR references.

It may just be easier to make the actual ISR function not a member of the class, and just have it call in to a member function from the global singleton you will probably need anyway.

Also, if you are leaving it in the class you would have to say:

MyClass::RTC_Interrupt

but then the file using it would have to cpp as well for that to work.

You may have to fiddle a bit to get this right.

I have to ask if the benefits of c++ are really going to out weight the price in size/speed and the issue of dynamic memory allocation, which is so important to effectively leveraging the advantages of c++.

You should also know that c++ is as not much used and therefore not as well tested as c.