Atmega328-au bootloader with uno

Other Hardware 3rd Party Boards
1

Hi, i make arduino pro mini using atmega328-au (none P)

I try to write bootloader with UNO in my pro-mini, the error is occur!

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

I searching google, I must revise the avrdude.conf and borads.txt.

But, It is very hard that finding exact code of avrdude.conf and borads.txt of atmega328-au.

So, how can i revise avrdude.conf and borads.txt files?

Is there anything else i revise more (exclude that files)?

part4_MCU.png
part4_MCU.png888×491 18.8 KB

2

Find avrdude.conf in your /arduino files.
Open it with Notepad++
https://notepad-plus-plus.org/download/v6.9.1.html
Find Atmega328P
Change the signature bytes from

signature = 0x1e 0x95 0x0F;

to

signature = 0x1e 0x95 0x14;

Then select Uno as board type and try again.

You do have a 16MHz crystal and 2 22pF caps, or a 16 MHz resonator, attached? Uno as board type requires an external oscillator. Also a good idea for proper operation is 10K pullup resistor from Reset to +5V, and 0.1uF caps from VCC and AVCC to Gnd, and from Aref to Gnd.
Connect +5V to VCC and AVCC. Do Not connect to Aref, that is connected internally.

3

Hi, Crossroads.
Thank for your reply.
I attach my schematics.

My pro mini is 8Mhz 3.3V. And I use 8Mhz crystal with 18pF caps, 10K pullup resistor, 0.1uF caps form AREF to GND, VCC to GND( not include the schematics but done), AVCC to GND( not include the schematics but done).

The schematics is same with usual promini schematics.

I was try to change the signature 0x0F to 0x14, But error was occur. T.T

4

Schematic looks ok.
Board type, select Promini 328 with 3.3V/8MHz

Which IDE are you using? Perhaps the method needs to change a little.

5

I use IDE 1.6.8 , the latest version.

6

Back up to 1.6.7 then. 1.6.8 has various problems, this may be one of them.

7

avrdude: Device signature = 0x000000 (retrying)

this is the reason....

8

You do have a Programmer connected, yes? It connects to SCK, MISO, MOSI, Reset, Power, Gnd, and accesses the memory directly to load the bootloader.
I don't see an ICSP header. You can use a Programmer and a press-on adapter like this to load the bootloader.