Sleep

[tazntex]

Over the weekend I looked over the 16 key serial keypad example at Bruce's website. I was wondering how would I go about adding a SLEEP or NAP command to his code if no button is pressed I could conserve power. And also how would I make it wake up when a button is pressed? After searching the forums I've seen the @sleep, sleep for X period but have not found a good suggestion for using SLEEP. Here is Bruce's link to the keypad code:
http://www.rentron.com/serkey16.htm


Thanks

[mackrackit]

Being the the example is using PORTB...
http://www.picbasic.co.uk/forum/showpost.php?p=60877&postcount=3

[tazntex]

I saw that post earlier, not having much if any knowledge on Assembly, I wasn't quite sure what was going on. I tried it out, added a while;wend with an led flashing when it arrived at that point and then after added @sleep @no. I believe that the NOP clears the GIE bit according to the '628 datasheet but noticed that the example on this forum showed it added twice. Anyhow I powered the '628 with a 78L05 regulator with a 9V battery without using the @SLEEP and I am drawing 12mA measuring from battery into the regulator. With the @SLEEP command I am still drawing 12mA so believing that the regulator is the cause. The Quiescent Current on the 78L05 is 3 min. 5mA max and on the LP2950CZ-5.0 it is 75uA. I have ordered a LP2950CZ-5.0 regulator. Perhaps this will cure my project's hunger for batteries.


Thanks for your help, '73