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Creating an interrupt function with stm32f303 and ARMCC compiler

Jim Papay

Hi all,

I am having difficulty in understanding "interrupts".
I am writing code for a stm32f303 microcontroller using ARMCC in Keil uVision 4 IDE.

After doing a couple of days of reading online and the compiler manual I have created
an interrupt function that looks like this:

////////////////////////////////////////////////////////////////////
__irq void TimerInterrupt(void) // located in the source file
{

.....statements....

}
///////////////////////////////////////////////////////////////////

///////////////////////////////////////////////////////////////////
__irq void TimerInterrupt(void); // located in a header file
///////////////////////////////////////////////////////////////////

Now, what I am trying to do overall is to have a interrupt function that will be called
when a timer reaches it's overflow and sets an interrupt bit.

Thankyou in advance if anyone has anything to contribute to this.

Sincerely,
Jim

  • 0

    Do you mean interrupts in general (applicable to any architecture), interrupts in the Cortex-M4 hardware, or just how to handle interrupts in Keil's tools?

    Note that the STM32F303 is a Cortex-M4:

    www.st.com/.../252054.jsp

    One of the key things about Cortex-Mx is that interrupt service routines (ISRs) aka "handlers" can be written entirely in standard 'C' - with no need for any special compiler options or extensions.

    Keil provide plenty of examples, as do ST.

  • 0 in reply to Andy Neil

    I am referring to how to create an interrupt function.
    Something like:

    void TimerInterrupt(void) __irq
    { .... }

    This is what I am seeing in the armcc compiler information
    But when I am compling this I get an error.

    routine.h(60): error: #147-D: declaration is incompatible with "void TimerInterrupt(void)" (declared at line 50)

    Thank-you for the information. I will read it.

  • 0 in reply to Jim Papay

    Hello english isn't my mother language and i'm right now very busy,because of that this explanation was translated by google translator, and i made minor correction to it but i think that you can take the general idea. For further info i suggest that study CMSIS interface and who things are done in the ARM Cortex-M.

    Interrupt handling in these devices is carried out by CMSIS interface in the file <device>startup_.s are defined as all interrupt vectors supported by the device in question, then <device>_it.h and <device>_it.c respectively are declared and implemented the functions that will serve the interruptions, the identifiers of these functions must match those defined in startup_<device>.s file although any function whose declaration appears in the main and match the name defined in the bootfile can serve the interrupt in question, so that they are in <device>_it.c promotes code organization.

  • 0 in reply to Ernesto Cruz Olivera

    I want to thank everyone for there help in understanding the interrupt problem I had.

    I found that the error message I was getting was from have two prototypes in an header file.

    Thanks again,

    Jim