julos63 / open-evse

Automatically exported from code.google.com/p/open-evse
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Will not enter charging state #8

Closed GoogleCodeExporter closed 8 years ago

GoogleCodeExporter commented 8 years ago
SYMPTOMS/ENVIRONMENT:
After plugging vehicle into the open-evse (v4 hardware & v1.0.9 firmware), the 
state is perpetually "EV Connected - EVSE Ready".  The EVSE will not advance to 
the "Charging" state.

Additional symptoms are the boot up sequence takes about 10 seconds (as opposed 
to about 1 second normally) and it causes the pilot pwm frequency to be ~60Hz 
instead of 1kHz (seen with a DMM or oscilloscope).

ISSUE:
This occurred after programming a virgin atmega328p using the ICSP and the 
Arduino IDE by following the instructions at 
https://code.google.com/p/open-evse/wiki/LoadingFirmware and 
http://blog.lincomatic.com/?p=10.

The reason for this occurring is that following this specific programming 
process, the AVR fuses are not set causing the micro-controller's clock to run 
too slow.

WORKAROUND:
Follow the instructions specifically for setting the fuses on 
https://code.google.com/p/open-evse/wiki/AVRDUDE

Original issue reported on code.google.com by tracyand...@gmail.com on 16 Mar 2013 at 10:20

GoogleCodeExporter commented 8 years ago
That is an odd oversight. Fuse bit settings are needed no matter what method is 
used. I edited the LoadingFirmware page to include a mention of setting the 
fuses.

Original comment by mrpilot...@gmail.com on 17 Mar 2013 at 3:49

GoogleCodeExporter commented 8 years ago

Original comment by chris1howell83 on 29 Apr 2013 at 2:09