[Coco] Detecting when CoCo is turned OFF
rickulland1 at gmail.com
Fri May 7 16:29:40 EDT 2021
On 5/7/21 1:47 PM, Salvador Garcia via Coco wrote:
> Hello all!
> I am pondering on designing an Arduino based board to receive serial data coming from the CoCo's bit banger port. I would like for the Arduino board to do something when the CoCo is powered off...
In Linuxland we'd run 'heartbeat'. You could cobble your own version maybe.
Whenever the port is not actively in use, CoCo sends a unique byte
string every minute? or so as a keepalive. If there has been no data and
no special byte string in a reasonable time, the CoCo is off.
Afterwards, if Arduino starts seeing the keepalive after a silent
period, it is time to start looking for real data (not our special byte
string) on the serial port again.
More information about the Coco