hi,
i really need this problem solved.
its holding up a lot of my work.
could any of you guys please help me out??
thanks
karan
On Sat, 2004-10-02 at 11:08, karan wrote:
> how do i detect a gpio interrupt??
>
> i am using the msp430 stk2 kit from olimex which has the msp430449.
>
> there is a sender msp430 which is intermittently
> setting bit4 on the P2 port, which is on the EXT connector.
>
> there is a receiver msp430 which should detect when a transition has
> taken place
> on the P2.BIT4 through the EXT connector.
>
> this is my code for the receiver:
>
> # include <io.h>
> # include <signal.h>
>
> int main(void)
> {
> WDTCTL = WDTPW + WDTHOLD; // Stop WDT
>
> _EINT(); // Enable interrupts
>
> P2DIR &= ~BIT4; // input direction
> P2SEL &= 0x00; // select gpio function
>
> P2IES &= ~BIT4; // set p2bit4 for low-to-high transition
> P2IE |= BIT4; // enable interrupt on bit4 of port2
>
> while(1)
> {
> if ((P2IFG & BIT4) == BIT4) // has interrupt flag been set
> for bit4?
> {
> // do something here
> P2IFG &= ~BIT4; // unset interrupt flag
> }
> }
>
> return 0;
> }
>
> but this is not happening.
> the receiver does not detect this interrupt.
>
> am i doing something wrong?
>
> thanks
> karan
> CM II
> Resolution Systems Inc.
>
CM II
Resolution Systems Inc.
