AVR-Chat

Just wanted to thank everyone for the ideas and let you know which direction we're heading.  Our original plan was to write the data every 3 seconds into a wear-leveling buffer.  However, since the hardware is still in flux, we're increasing our power supply capacitors to provide more time after the power failure.  We already had INT0 wired up to indicate power failure; so the plan is to NOT write the data until the interrupt is triggered.  The interrupt routine will then write the data to EEPROM and enter a while(1) loop, waiting for the power to die.

The flip side, is making sure the processor waits long enough on power up for the capacitors to charge (in our case, it shouldn't be a problem) before starting anything that would require storage on shutdown.


Thanks again,


Tim

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