Cannot program EFUSE or test Flash

Topics related to the HV Rescue Shield:
http://mightyohm.com/hvrescue2
hlawka_667
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Joined: Sat Aug 15, 2015 2:10 pm

Cannot program EFUSE or test Flash

Postby hlawka_667 » Sun Aug 16, 2015 4:19 pm

Partially working HV Rescue Shield 2:
1) Test EEPROM succeeds
2) LFUSE and HFUSE are correctly programmed
3) Cannot program EFUSE
4) Cannot successfully test Flash

What might explain these symptoms?

Thanks.

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mightyohm
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Re: Cannot program EFUSE or test Flash

Postby mightyohm » Sun Aug 16, 2015 5:24 pm

Hi hlawka - what arduino sketch are you using with the shield? My sketch does not support "Test eeprom" or "Test flash". I am not able to support 3rd party software with the shield.

hlawka_667
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Joined: Sat Aug 15, 2015 2:10 pm

Re: Cannot program EFUSE or test Flash

Postby hlawka_667 » Wed Aug 19, 2015 2:32 pm

I’m using the alternative “Plus” code version that’s on the web site, as well as your standard sketch. The test point shows +12.4V. Neither sketch allows the 328P’s EFUSE high nybble or bit 3 to be programmed, or allows the Flash to be tested or programmed.

Thanks.

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mightyohm
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Re: Cannot program EFUSE or test Flash

Postby mightyohm » Sat Aug 22, 2015 7:34 pm

The latest sketch is here:
http://mightyohm.com/files/hvrescue21/H ... sketch.zip

Not all bits of the FUSE bytes can be programmed. For a list of valid bits see here: http://eleccelerator.com/fusecalc/fusec ... atmega328p