C5510 External Interrupt

marcelo simioni

Hi! I using the DSK5510 and i need something that increase a constant inside my program when i press a button. I think in a push button connect in some pin of P2 (peripheral expansion connector). I know to use interruption in others devices but i'm not familiar with interruption of the DSK5510, there's a lot of documetation and i feeling lost!

I need a routine/code (inicialization of the registers needed) that monitor the state of pin 47 (INT0n) and increase a constant when the button was pressed.

Thanks.

Regards.

over 12 years ago

0 Steve Tsang over 12 years ago

TI__Mastermind 23785 points

Have you refer to the tutorial and examples in Spectrum Digital's DSK site?

http://c5000.spectrumdigital.com/dsk5510/

Regards.

0 marcelo simioni over 12 years ago in reply to Steve Tsang

Prodigy 40 points

Hi Steve!

I just want to know how i configure the INT0 (pin 47) for external interrupt. If i want to use the IRQ functions, what commands i need to initialize/use INT0?

Excuse my ignorance!! :)

0 Steve Tsang over 12 years ago in reply to marcelo simioni

TI__Mastermind 23785 points

INT0 is an input pin and is enabled via bit 2 of Interrupt Enable Register 0 (IER0). IER0 is mapped to 0x00.

Regards.

0 marcelo simioni over 12 years ago in reply to Steve Tsang

Prodigy 40 points

So, to use INT0, just need this steps:

INTM=0;

IER0=0x0004;

and when an event occur in the pin#47 of the peripheral expansion connector, the bit 2 from the IFR0 will change?

Thanks for to answer so quickly! And sorry, i'm very newbie in the DSP field!

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C5510 External Interrupt