Intailization of External interrupt 52235

Latha — Thu, 27 Aug 2009 20:14:41 GMT

Hello

I am working with MCf52235 and using IR7 as an external interrupt .I want to configure it as to generate an interrupt on the falling edge.

As per the Refernce manaual I intialzed it . But I am not able to see the interrupt .

Can some body help with the intailization code.

Re: Intailization of External interrupt 52235

paddy — Thu, 27 Aug 2009 20:43:21 GMT

Hi Latha,

Try by below settings

MCF_GPIO_PNQPAR = 0

| MCF_GPIO_PNQPAR_IRQ7_IRQ7;

MCF_GPIO_DDRNQ = 0;

MCF_EPORT0_EPPAR = 0
| MCF_EPORT_EPPAR_EPPA7_FALLING;

MCF_EPORT1_EPFR = MCF_EPORT_EPPAR_EPPA7_FALLING;

MCF_EPORT0_EPIER = 0

| | MCF_EPORT_EPIER_EPIE7;

MCF_INTC0_IMRL &= ~(0
        | MCF_INTC_IMRL_INT_MASK7
        | MCF_INTC_IMRL_MASKALL);

map the interrupt in vector.s file

Regards,