Atmega328 custom bootloader

Using Arduino Microcontrollers
1

Hi,

I've been reading dozens of articles about loading a bootloader into an Arduino using another Arduino(in my case, the Duemilanove), and honestly I don't get it, it gives me continuous errors(like Error while burning bootloader).

The Arduino which I want to program is the ArduPilot Legacy. I want to put in it a custom bootloader, which I found it on the sparkfun website for wireless purposes. The problem is that I can't program it in no way. I've tried all the bootloaders in the menu, nothing worked.

This is the configuration I made:
-pin 13 goes to pin 13(to ArduPilot)
-pin 12 goes to pin 12(to ArduPilot)
-pin 11 goes to pin 11(to ArduPilot)
-pin RESET goes to pin 10(to ArduPIlot)
-and the 5V power supply.
-it has no other components (for instance a capacitor)
-the program which I have uploaded to the Duemilanove is the ArduinoISP found in the arduino folders.
-the programmers is selected as "Arduino as ISP"

Now, this is the reference website for the new bootloader which I want to burn.
-http://www.sparkfun.com/tutorials/122 and this is the zip file (www.sparkfun.com/tutorial/WirelessBootloader/Wireless_Bootloader_ATmega168.zip)

I'll say, I don't have a parallel programmer so instead I've chosen this way of bootloading. The next question is how do I bootload it using an Arduino as ISP?
I'll be glad to hear someone that knows how to do it, because I staying here and trying to get it work for some time.

Thank you in advance,
RobertEagle

2

Did you disable the auto-reset in the Arduino that's acting as the programmer?

According to http://arduino.cc/playground/Main/DisablingAutoResetOnSerialConnection
you can put a 120? resistor between 5V and Reset.

I personally didn't have a resistor like that and didn't want to make one because I'm color blind, and that means I can't read colour coding and need to test each one…
So I just put a 10µF capacitor there, it worked really nice, as it won't let the reset pin go down from 5V.
It's dangerous though, as a lot of current could enter through that pin and burn something… but meh, being a daredevil is fun.

3

In addition to Ninoscript's comments, Pin 10 on the Duemilanove should be connected to Reset on the ArduPilot, not the other way around. Are the grounds connected?

4

I've done it at last.
And yes, I figured out then that I have to switch the pins.
It worked.

Thank you,
RobertEagle

5

Good job, I didn't notice the wrong connection :slight_smile: