I'm working on using an ATtiny to watch EMC2's charge pump. The plan is to have a count down that gets reset by a charge pump edge. If the counter reaches 0, then an alarm pin gets set. The counter reset value determines how long the charge pump has to do a reset. I can write code with the appropriate value, but if I wanted to make the watchdog watcher generic, I should have a way for a user to make the setting on the fly. My problem is that I can do this with a dip switch, potentiometer, serial or SPI link, or some other way I haven't thought of yet. Does anyone have any thoughts on what would be a good way to do this? The primary purpose for the watcher is to keep the motor drivers powered down until the PC boots and EMC2 is running. -- Kirk Wallace http://www.wallacecompany.com/machine_shop/ http://www.wallacecompany.com/E45/index.html California, USA
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