Help with Maxim Ibutton "IF THEN ELSE" statements please

[andybarrett1]

Steve

Could this be the Presence Pulse.. It mentions this in the Datasheet but no command. I Know the 1990R has it the 1990A has not .... I am using a "R"

Read Rom [33h] or [0Fh]
Search [F0h]
Match [55h]
Skip [CCh]

Presence [??h]

Searching around on a phone internet at moment so limited on resources!

BR
Andy

[EarlyBird2]

Could you use the value in S0 as a check. What value does it have with no button and what value with a button? There is also S7 CRC value that could be used in the same way.

You may need to reset S0 on each loop say to $0 then run owout owin and test the new value.

Just ideas nothing is tested