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Topic: Unrecognised Signature (Gammon tools) (Read 2116 times) previous topic - next topic

elmarko

Nov 13, 2019, 09:20 pm Last Edit: Nov 13, 2019, 09:21 pm by elmarko
Hi guys,

I've got an ATMEGA328P-PU running in a breadboard and I'm able to write sketches to it by popping out the chip from my Uno and wiring it up to the right pins. It's running with a 16MHz crystal at 5V.

I want to get into doing 3.3V projects but I've been unable to get Nick Gammon's tools working. The chip is back in the Uno to do that, the sketch is written to the Uno, and I monitor on serial monitor. The detector returns this:

Code: [Select]
Atmega chip detector.
Written by Nick Gammon.
Version 1.20
Compiled on Nov 13 2019 at 20:14:50 with Arduino IDE 10809.
Attempting to enter ICSP programming mode ........
Entered programming mode OK.
Signature = 0x73 0x73 0x73
Unrecogized signature.
LFuse = 0x7F
HFuse = 0x7F
EFuse = 0x7F
Lock byte = 0xFF
Clock calibration = 0xFF

First 256 bytes of program memory:

00: 0xFF 0xFF 0xFF 0xFF 0xFF 0xFF 0xFF 0xFF 0xFF 0xFF 0xFF 0xFF 0xFF 0xFF 0xFF 0xFF
10: 0xFF 0xFF 0xFF 0xFF 0xFF 0xFF 0xFF 0xFF 0xFF 0xFF 0xFF 0xFF 0xFF 0xFF 0xFF 0xFF
20: 0xFF 0xFF 0xFF 0xFF 0xFF 0xFF 0xFF 0xFF 0xFF 0xFF 0xFF 0xFF 0xFF 0xFF 0xFF 0xFF
30: 0xFF 0xFF 0xFF 0xFF 0xFF 0xFF 0xFF 0xFF 0xFF 0xFF 0xFF 0xFF 0xFF 0xFF 0xFF 0xFF
40: 0xFF 0xFF 0xFF 0xFF 0xFF 0xFF 0xFF 0xFF 0xFF 0xFF 0xFF 0xFF 0xFF 0xFF 0xFF 0xFF
50: 0xFF 0xFF 0xFF 0xFF 0xFF 0xFF 0xFF 0xFF 0xFF 0xFF 0xFF 0xFF 0xFF 0xFF 0xFF 0xFF
60: 0xFF 0xFF 0xFF 0xFF 0xFF 0xFF 0xFF 0xFF 0xFF 0xFF 0xFF 0xFF 0xFF 0xFF 0xFF 0xFF
70: 0xFF 0xFF 0xFF 0xFF 0xFF 0xFF 0xFF 0xFF 0xFF 0xFF 0xFF 0xFF 0xFF 0xFF 0xFF 0xFF
80: 0xFF 0xFF 0xFF 0xFF 0xFF 0xFF 0xFF 0xFF 0xFF 0xFF 0xFF 0xFF 0xFF 0xFF 0xFF 0xFF
90: 0xFF 0xFF 0xFF 0xFF 0xFF 0xFF 0xFF 0xFF 0xFF 0xFF 0xFF 0xFF 0xFF 0xFF 0xFF 0xFF
A0: 0xFF 0xFF 0xFF 0xFF 0xFF 0xFF 0xFF 0xFF 0xFF 0xFF 0xFF 0xFF 0xFF 0xFF 0xFF 0xFF
B0: 0xFF 0xFF 0xFF 0xFF 0xFF 0xFF 0xFF 0xFF 0xFF 0xFF 0xFF 0xFF 0xFF 0xFF 0xFF 0xFF
C0: 0xFF 0xFF 0xFF 0xFF 0xFF 0xFF 0xFF 0xFF 0xFF 0xFF 0xFF 0xFF 0xFF 0xFF 0xFF 0xFF
D0: 0xFF 0xFF 0xFF 0xFF 0xFF 0xFF 0xFF 0xFF 0xFF 0xFF 0xFF 0xFF 0xFF 0xFF 0xFF 0xFF
E0: 0xFF 0xFF 0xFF 0xFF 0xFF 0xFF 0xFF 0xFF 0xFF 0xFF 0xFF 0xFF 0xFF 0xFF 0xFF 0xFF
F0: 0xFF 0xFF 0xFF 0xFF 0xFF 0xFF 0xFF 0xFF 0xFF 0xFF 0xFF 0xFF 0xFF 0xFF 0xFF 0xFF

Programming mode off.


Is this indicative of a dodgy chip, or a different version? All my wiring is absolutely fine (checked 4-5 times now, plus it works fine and runs sketches OK). Anyone got any ideas of what I can try?

elmarko

Oh, appears the received data is different every single time. Can't be good.

elmarko

For everyone's information I tried to burn 8MHz with the ArduinoISP sketch instead and this worked fine *shrug*

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