08M into low power
- Thread starter rolsen
- Start date
I've just tried this on an 18X.
Works fine.
<code><pre><font size=2 face='Courier'>
slow:
poke$8F, %00010000 '125kHz
testing:
if pin7 = 1 then dothings
goto testing
Dothings:
poke $8F, %01100000 '4 MHz
sertxd ("hello there!",cr,lf)
High 1 : pause 500 : low 1
' do other things as needed
goto slow
</font></pre></code>
e.
Works fine.
<code><pre><font size=2 face='Courier'>
slow:
poke$8F, %00010000 '125kHz
testing:
if pin7 = 1 then dothings
goto testing
Dothings:
poke $8F, %01100000 '4 MHz
sertxd ("hello there!",cr,lf)
High 1 : pause 500 : low 1
' do other things as needed
goto slow
</font></pre></code>
e.
kranenborg
Senior Member
Hello,
Eclectic showed the right approach using a lower clock speed, as all functionality is still available, just the pace of instruction execution becomes slower. I wish to add two things:
- Even lower power consumptiom is possible at 31 kHz.
- You can also use an interrupt to "wake up"; the first instruction of the interrupt routine would be a poke to set the clock speed at 4MHz (or 8 MHz); in the interrupt routine gosubs to functional modules are placed, and at the end of the interrupt routine the clock speed should be set low again. Use diode mixing for handling interrupts on several pins
The approach should work on all picaxes with interrupt capability and scalable clock
Regards,
Jurjen
www.kranenborg.org/ee/picaxe
Eclectic showed the right approach using a lower clock speed, as all functionality is still available, just the pace of instruction execution becomes slower. I wish to add two things:
- Even lower power consumptiom is possible at 31 kHz.
- You can also use an interrupt to "wake up"; the first instruction of the interrupt routine would be a poke to set the clock speed at 4MHz (or 8 MHz); in the interrupt routine gosubs to functional modules are placed, and at the end of the interrupt routine the clock speed should be set low again. Use diode mixing for handling interrupts on several pins
The approach should work on all picaxes with interrupt capability and scalable clock
Regards,
Jurjen
www.kranenborg.org/ee/picaxe
Jurjen. Thank you for the correction.
I was still half asleep when I sent the reply!
ROlsen I should have quoted my sources.
See Kranenborg’s post 18 Feb 2005 in this link.
http://www.rev-ed.co.uk/picaxe/forum/Topic.asp?topic_id=2321&forum_id=15&Topic_Title=problem%2B%2Bwith%2Bgetting%2Bvery%2Blow%2Bpower%2Bconsumption&forum_title=No+new+posts+please%21+9
And, this link for the values.
http://www.rev-ed.co.uk/picaxe/forum/Topic.asp?topic_id=2262&forum_id=15&Topic_Title=08M%2B%2BUNDER%2Bclocking%2B%2521&forum_title=No+new+posts+please%21+9
e.
I was still half asleep when I sent the reply!
ROlsen I should have quoted my sources.
See Kranenborg’s post 18 Feb 2005 in this link.
http://www.rev-ed.co.uk/picaxe/forum/Topic.asp?topic_id=2321&forum_id=15&Topic_Title=problem%2B%2Bwith%2Bgetting%2Bvery%2Blow%2Bpower%2Bconsumption&forum_title=No+new+posts+please%21+9
And, this link for the values.
http://www.rev-ed.co.uk/picaxe/forum/Topic.asp?topic_id=2262&forum_id=15&Topic_Title=08M%2B%2BUNDER%2Bclocking%2B%2521&forum_title=No+new+posts+please%21+9
e.