"Failed to enable DW" error message : trying to program Arduino UNO with Atmel ICE

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fastwalker
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Posted by fastwalker: Mon. Jun 11, 2018 - 06:12 PM
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Hi All,

 

I'm trying to get a simple LED blink program running on an Arduino UNO from Atmel Studio 7 on Windows 10.  I have the 6 pin ISP connector from the ICE connected to the UNO board, have it powered on, and have the ICE selected as the programmer tool in the IDE.  I have the interface selected as "debugWire" (other choice was ISP).  When I hit the "Start Debugging and Break" menu option I first see the dialog asking to use SPI to enable the DWEN fuse.  I select yes to this.  I then get the "Failed to enable DW" error message as shown in the screenshot.

 

Can anyone advise what is going wrong?

 

Thank you,

FW.

 

This topic has a solution.

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Tools, Atmel Studio (AVR-related), solved
Last Edited: Mon. Jun 11, 2018 - 08:07 PM
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clawson
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Posted by clawson: Mon. Jun 11, 2018 - 06:14 PM
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Have you made the hardware mod to the Arduino so debugWire can be used?

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fastwalker
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Posted by fastwalker: Mon. Jun 11, 2018 - 06:16 PM (Reply to #2)
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No.  What mod. is required?

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clawson
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This reply has been marked as the solution. 
Posted by clawson: Mon. Jun 11, 2018 - 07:14 PM
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Ever heard of Google? But the bottom line is dW needs NOTHING connected to _Reset. The board should have a solder bridge you can break to ensure this.
.
Actually google brought me back to here... https://www.avrfreaks.net/forum/arduino-uno-and-avr-70-ice-debugging-possible

Last Edited: Mon. Jun 11, 2018 - 07:16 PM
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fastwalker
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Posted by fastwalker: Mon. Jun 11, 2018 - 07:16 PM (Reply to #4)
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Thanks.  Once I de-solder this bridge, will I still be able to program the board via the Arduino IDE, or will it be ICE only from that point?

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clawson
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Posted by clawson: Mon. Jun 11, 2018 - 07:17 PM
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Edit above.

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fastwalker
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Posted by fastwalker: Mon. Jun 11, 2018 - 08:06 PM
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OK, got it working.  As advised, I had to de-solder the bridge labelled "REST ON" on my Uno.  For other readers this is the red boxed area in the pic. below.

 

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clawson
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Posted by clawson: Mon. Jun 11, 2018 - 09:23 PM
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I think youll find that is "RST EN" (reset enable)

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ki0bk
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Posted by ki0bk: Wed. Jun 13, 2018 - 06:49 PM
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fastwalker wrote:
Thanks. Once I de-solder this bridge, will I still be able to program the board via the Arduino IDE, or will it be ICE only from that point?

 

With solder bridge on, == Arduino bootloader program loading only

With solder bridge off, == ISB programmer only + debugWire debugging

 

Note: once you have loaded a program via the ISP, the bootloader will be overwritten, to restore Arduino bootloader operation, you must burn bootloader using ISP, THEN add the solder bridge!

 

Jim

 

 

 

 

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