Hello.
I am developing ibutton reader+MSR(credit card reader) device. It works fine seperately, but when I tried to read card while ibutton is attached, problem happens. I have to detect ibutton attach and detach, so I should send reset pulse periodically to detect it. and as far as I know, there should be no interrupt while ibutton routine is running. but when I read credit card, hundreds of interrupt is occurred in a swipe, and sometimes ibutton routine recognize that there is no ibutton even though ibutton is being attached. so another ibutton attach/detach is recognized. Do you think there is solution for this? frequency of ibutton routine is very low compared with other routines.
Thanks.