Mark,
Some time, because the system could works 4/5 days without issue and one day !!!!
In this case this is a kind of terminal, with an LCD 4x20 lines, an keyboard and an RFID reader (serial communication).
There is an IP connection (Lantronix modul) and an ISP FRAM 2MB (RAMTRON).
The deal is to download in the memory via IP, Acces credit. (or black list up to 30000 forbiden list)
Each user come with his RFID card, there is a check with the authorisation list AND credit card to distribute water throught
an relay and an water counter (250 pulses by liters).
data are modified insid credit card (Mifare 1K) with new credit and historical informations (as FRAM).
Keyboard is like ATM function.
There is now more than 200 system in the world.
but only 10 with Xmega ... and issue.
Around 100 users by day. (night and day)
All writing with perfect bascom (around 7000 lines).
The most INT routine is INT0 each second for light, long timer and overtime system (when user do nothing since 30 seconds, system go to start).
during long function (like water distribution), Into is disabled
so i will work around INT issue and try to extract information to understand what happen.
include a picture of the first one (internal model).
Tks for your help
Patrick
↧