MPC5xxxのトピックRe: MPC57xx external interrupt

MPC57xx external interrupt

jefferson_ll — Thu, 17 Nov 2016 05:51:10 GMT

Hi NXP,

I have used MPC57xx platform in my project.

There is a question confused me about GPI and interrupt status.

I use PA2 as GPI.

The following sitting is PA2 config setting.

SIUL2.DIRER0.B.EIRE2 = 0 ;

SIUL2.DISR0.R = 1<<2;

SIUL2.IREER0.B.IREE0 =0 ;
SIUL2.IFEER0.B.IFEE0 = 1;

SIUL2.MSCR[2].B.SSS = 0 ;
SIUL2.IMCR[175].B.SSS = 1 ;

SIUL2.MSCR[2].B.OBE = 0;
SIUL2.MSCR[2].B.ODE = 0;
SIUL2.MSCR[2].B.IBE = 1;
SIUL2.MSCR[2].B.PUS = 1;
SIUL2.MSCR[2].B.PUE = 1;

SIUL2.DISR0.R = 1<<2;
// SIUL2.DIRER0.B.EIRE2 =1; //enable "external interrupt request_2"

After above PA2 config. and Interrupt setting I have always read "SIUL2.DISR0.R" and handly tie PA2 high or low to generate edge trigger.

Unfortunately, I always can't get any external interrupt status .

Does there something wrong in the above setting?

Please help me or give me some reference code.

Thanks

Best regards,
Jeff

martinkovar — Tue, 22 Nov 2016 09:24:18 GMT

Hi Jeff,

we have already resolved this issue via NXP support case, but I will place my answer also here.

Please see example in the attachment. It shows, how to correctly configure external interrupt.

Regards,

Martin

jefferson_ll — Tue, 22 Nov 2016 10:00:24 GMT

Hi Martin,

I have found something wrong setting in IREER0 after modified it the external interrupt ISR could be triggered.

Thanks for your help.

Best regards,

Jeff

martin_kovar — Tue, 22 Nov 2016 16:48:49 GMT

Hi Jeff,

we have already resolved this issue via NXP support case, but I will place my answer also here.

Please see example in the attachment. It shows, how to correctly configure external interrupt.

Regards,

Martin