Author Topic: GM328 transistor tester MCU firmware update  (Read 957 times)

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Offline sdancer75

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GM328 transistor tester MCU firmware update
« on: March 17, 2019, 08:23:59 am »
Hi,

I bought a GM328 transistor tester that can't be calibrated. It stucks at the "short probes" stage. Anyway, I decided to update the MCU firmware.

I connected the ATMega328pu to my breadboard and I double checked the connections with my DMM. The AVRdude always return the following error :

D:\temp\GM328\EN>avrdude -pm328p -cUSBasp -B4 -Pusb

avrdude: set SCK frequency to 187500 Hz
avrdude: warning: cannot set sck period. please check for usbasp firmware update.
avrdude: error: programm enable: target doesn't answer. 1
avrdude: initialization failed, rc=-1
         Double check connections and try again, or use -F to override
         this check.


avrdude done.  Thank you.



I even tried to connect an external crystal but without luck. What seems to be wrong here? My OS is Win10/64Bit and AVRdude is v5.10

Regards,




 

Offline sdancer75

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  • Country: gr
Re: GM328 transistor tester MCU firmware update
« Reply #1 on: March 17, 2019, 10:51:14 am »
An 8MHZ crystal solved the problem !!! :phew:

Best Regards,
 

Offline sdancer75

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  • Posts: 104
  • Country: gr
Re: GM328 transistor tester MCU firmware update
« Reply #2 on: April 15, 2019, 05:12:00 pm »
Also to note, the GM328 could not be calibrated because it had wrong resistors. I replaced them, and it worked like a charm.

« Last Edit: April 15, 2019, 05:14:35 pm by sdancer75 »
 


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