// Alarm output
#define ALARMENABLE port2.out.pin5 = 1
#define ALARMDISABLE port2.out.pin5 = 0
I prefer to make it simpler for the compiler and generally define things
like
#define P5_ALARM_ENABLE (1<<5) /* or 0x20 */
#define P5_ALARM (1<<6) /* or 0x40 */
and use it in the code like
P5_OUT |= P5_ALARM_ENABLE;
P5_OUT &= ~P5_ALARM_ENABLE;
then this also works,
P5_DIR |= P5_ALARM_ENABLE; /* make the ALARM_ENABLE pin an output */
and
if ((P5_IN & P5_ALARM) != 0)
{
printf("Alarm set\n");
}
or
if ((P5_OUT & P5_ALARM_ENABLE) != 0)
{
printf("Alarm enabled\n");
}
Ok, maybe its not as simple to write the main code as BitSet, BitReset
etc macros, bit its always obvious what is going on, and generally
compiles down to compact code, you do have to know how the bits work,
but as an embedded programmer maybe that is a good thing.
As usual many ways to skin a cat.
Regards,
--
Peter Jansen
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