328P to 328P-PU bootloader UNO

[karlpilkington]

Greetings

I am trying to burn bootloader to a uno with a 328P-PU (target). The "programer" uno has a 328P chip.

Here are the steps I have followed

1. Upload ArduinoISP sketch to new uno (programer)
2. Connecting target to programmer per:

https://support.arduino.cc/hc/en-us/articles/360012048080-How-to-burn-the-bootloader-between-two-Arduino-UNO

3. Changed Programmer to Arduino as ISP
4. Burn Bootloader

I did not change or edit the avrdude.conf (hardware\tools\avr\etc)

the error I get:

Error :
Error while burning bootloader.
Reading | ################################################## | 100% 0.02s

avrdude: Device signature = 0x000000
avrdude: Yikes! Invalid device signature.
Double check connections and try again, or use -F to override
this check.

Please help, thanks in advance!

[missdrew]

Can you show a photo of YOUR wiring please. Hopefully it's an easy fix.

[karlpilkington]

uno with plastic case is the programmer.

[missdrew]

Looks OK. Can you swap the jumper cables, just incase one is faulty!

[karlpilkington]

new jumpers = same error

avrdude: Device signature = 0x000000 (retrying)

Error while burning bootloader.
Reading | ################################################## | 100% 0.02s

avrdude: Device signature = 0x000000
avrdude: Yikes! Invalid device signature.
Double check connections and try again, or use -F to override
this check.

avrdude done. Thank you.

[groundFungus]

Doesn't the programmer Uno need to have its reset disabled after the ArduinoISP sketch has been loaded ? A 10uF cap from the programmer's reset to ground.

Reply #5 of this thread.

[karlpilkington]

Tried it with a 100 UF cap and still same error.

[missdrew]

Do you have access to an oscilloscope? you could test the pins on the ATMEGA to see if there is activity.

It could be a dead ATMEGA, though I have seen faulty crystals(Resonators) as well. Do you have onther ATMEGA to swap over on the 'dead' board?

[johnwasser]

@groundFungus

Doesn't the programmer Uno need to have its reset disabled after the ArduinoISP sketch has been loaded ?

Yes but the symptom would not be a "Device signature = 0x000000". The UNO bootloader will return the signature for an ATmega328p. Problems will happen later, typically a verify error because the bootloader doesn't actually write to the fuses or bootloader area.

[karlpilkington]

Thanks for all the feedback.
Unfortunately I do not have access to an oscilloscope. Nor do I have access to a spare ATMEGA.

If I do not want to replace any hardware on the target UNO, at what point do I call the board bricked?

[hammy]

You can get the “mighty core” from git , that may well do it as you can select the 328 processor type in that ( worth a punt)

[groundFungus]

The core to use if you have the mega328 (Uno, Nano) use the MiniCore core. The MiniCore core is available through the IDE Boards manager.

[hammy]

Agree - I get them confused !!

[missdrew]

@karlpilkington

If I do not want to replace any hardware on the target UNO, at what point do I call the board bricked?

To test if the board is faulty, or just the chip, you could swap the 328 between the 2 boards, and test the currently non working board. This would tell you if it is the Chip, If it is, a couplke of Pounds/Euros/Dollars would get you up and running.