PortB-Interrupt

[_mike_]

Hi,

i use the interrupt on change on portb. I detect the signals on portb4-portb7.

in the interrupt-routine #int_rb i detect the changes on portb.

BUT:

the interrupt_flag RBIF will be cleared at the end of the routine.

What is if i get signal during the interupt - routine, but the RBIF is set and only cleraed at the end!

Do you think I will get a loss of data??


Best wishes,

Mike

[Mark]

That's why you keep the interrupt as short as possible. You can also use the NOCLEAR option and clear the flag yourself at the begining of the routine.

[Ttelmah]

Remember also, that you must read the port, before resetting the flag.

Best Wishes