Atmel ICE power

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mikey1
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Posted by mikey1: Wed. Nov 8, 2017 - 09:52 PM
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When using atmel ice do I need tor provide the +5v and gnd to the 6 pin debug connector or does it come from the debugger?

 

I have it working with an Arduino , now I'm trying in on my custom board.

 

Thanks

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Tools, In-System Debuggers and Programmers
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awneil
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Posted by awneil: Wed. Nov 8, 2017 - 10:04 PM
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The debugger does not provide power to the target.

 

The VTG input samples the power from the target.

 

http://www.atmel.com/Images/Atmel-42330-Atmel-ICE_UserGuide.pdf

 

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mikey1
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Posted by mikey1: Wed. Nov 8, 2017 - 11:07 PM (Reply to #2)
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Should have checke the manual 1st - thanks

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mikey1
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Posted by mikey1: Fri. Nov 10, 2017 - 05:01 PM
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Debug is now working - number of things were wrong.

 

- vcc and gnd not connected between spi connector and 328 chip - duh

- removed 1k and cap from reset line

-added 5k on reset to gnd

-non standard header connections on my board required adapter cable - built incorrectly

 

No partial credit in engineering everything has to be right!

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gchapman
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Posted by gchapman: Fri. Nov 10, 2017 - 05:38 PM (Reply to #4)
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mikey1 wrote:
No partial credit in engineering ...
There is ... no parts were smoked!

Well done!

Brain farts allowed.

 

"Dare to be naïve." - Buckminster Fuller

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joeymorin
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Posted by joeymorin: Fri. Nov 10, 2017 - 06:37 PM
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-added 5k on reset to gnd

Not likely needed.  debugWire is an 'open-drain' protocol, so it relies on the pull-up internal to the target to lift /RESET high when not driven low.  Your pulldown can only interfere with that.

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