> I am trying to set the state of GPIO pin using
> GPSR/GPCR registers. But the state I am trying to set
> is not reflected on the GPIO pin. The pin always
> reatins its old state.
>
> I am using the following piece of code in
> the driver.
>
> set_GPIO_mode(81 | GPIO_OUT);
> old_state = ( GPLR(81) & GPIO_bit(81))?1:0 ;
> /* old_state is zero */
> GPSR(81) |= GPIO_bit(81); /*set pin state to 1*/
> new_state = ( GPLR(81) & GPIO_bit(81))?1:0 ;
>
> But I always get new_state as zero.
>
> Any idea why the GPIO pin state is not
> changing even after setting in GPSR/GPCR registers?
> Did I miss any settings in some other registers?
>
Um... Maybe cleaning the GPCR just after set_GPIO_mode? And look at you
don´t have configurated Alternate Functions in GAFR.
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