Algorithm Ideas for an Application?

[ritchie]

Hello,

I have a PIC application that store employee information at 16bytes data to an external FRAM memory.

My idea is like this:
[1] I read the ID badge
[2] store in a temp buffer
[3] access the external memory
[4] store in another temp buffer
[5] compare the two buffer
[6] if it match.. employee gain access
[7] if not... get another data from external memory
[8] repeat step 5 (loop next)

Anyone have ideas of the alogorithm with regards to this application ?

Need your comments and suggestions.

Thank you.

[Neutone]

What is the worst case time to verify an ID. You would be reading the entire FRAM. You seem to have an algorithm already.

[John P]

If processing time is an issue you could store the data in the external memory in "alphabetical order" or some method that allows you to search faster than just going through a list in sequence. You might need to store the actual number of records somewhere too--perhaps internal EEPROM?