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When i build my Atmega328p-pu on a circuit board for my moped i needed to bootload it.
Because i have none external programming equipment i needed to use my Arduino Mega 2560 as ArduinoISP ( http://arduino.cc/en/Tutorial/ArduinoISP ) .
You need:
-Arduino mega
-Breadboard or pcb made atmega chip arduino
-100nF capacitor
-usb cable for arduino mega 2560 -> pc
-arduino IDE ( http://arduino.cc )
-some wires to connect the arduino mega 250 to your homemade arduino.
One of the difficulties of the mega board is that all the pins are different so most tutorials who are aimed at the UNO board or the Duemilanove or Diecimila are useless because the Mega board pinout is different.
To know which pinout is needed for the Arduino Mega 2560 the arduino.cc website has a special webpage : ( http://arduino.cc/en/Main/ArduinoBoardMega2560 ) .
This is how you need to wire up your arduino mega 2560 to an Atmega 168/328 (same pinout) microchip : See picture above
PS. For the exact pinout of an Atmega 168/328 chip look : http://softsolder.files.wordpress.com/2009/09/arduino-vs-atmega168-chip-pinouts.png?w=640&h=302
The High resolution picture of how to hook the arduino up : http://i54.tinypic.com/k55pb9.png
Because i have none external programming equipment i needed to use my Arduino Mega 2560 as ArduinoISP ( http://arduino.cc/en/Tutorial/ArduinoISP ) .
You need:
-Arduino mega
-Breadboard or pcb made atmega chip arduino
-100nF capacitor
-usb cable for arduino mega 2560 -> pc
-arduino IDE ( http://arduino.cc )
-some wires to connect the arduino mega 250 to your homemade arduino.
One of the difficulties of the mega board is that all the pins are different so most tutorials who are aimed at the UNO board or the Duemilanove or Diecimila are useless because the Mega board pinout is different.
To know which pinout is needed for the Arduino Mega 2560 the arduino.cc website has a special webpage : ( http://arduino.cc/en/Main/ArduinoBoardMega2560 ) .
This is how you need to wire up your arduino mega 2560 to an Atmega 168/328 (same pinout) microchip : See picture above
PS. For the exact pinout of an Atmega 168/328 chip look : http://softsolder.files.wordpress.com/2009/09/arduino-vs-atmega168-chip-pinouts.png?w=640&h=302
The High resolution picture of how to hook the arduino up : http://i54.tinypic.com/k55pb9.png
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Signing UpStep 1Uploading the ArduinoISP sketch
Now open the latest version of the Arduino IDE (currently 0022) .
Goto Tools
-> Board
-> Arduino Mega 2560
Now choose the correct Com port via Tools -> Serial port -> select the port used by you're arduino mega 2560.
Goto File
-> Examples
-> ArduinoISP
The ArduinoISP sketch will open up and now click upload to upload the sketch to the Arduino Mega 2560.
When the sketch is fully uploaded Put a 100nF Capacitor Between +5V and RESET pin on the Arduino Mega 2560 to disable auto reset. (whitout this tutorial wont work !)
Goto Tools
-> Board
-> Arduino Mega 2560
Now choose the correct Com port via Tools -> Serial port -> select the port used by you're arduino mega 2560.
Goto File
-> Examples
-> ArduinoISP
The ArduinoISP sketch will open up and now click upload to upload the sketch to the Arduino Mega 2560.
When the sketch is fully uploaded Put a 100nF Capacitor Between +5V and RESET pin on the Arduino Mega 2560 to disable auto reset. (whitout this tutorial wont work !)
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avrdude: Device signature = 0x000000
avrdude: Yikes! Invalid device signature.
Double check connections and try again, or use -F to override
this check.
A more simple idea would be to absorb the ground pulse from the auto reset capacitor with a larger cap 2uf+. I had a 2.2uf 50v cap lying around and use that to prevent the board from auto resetting. yet the reset button will work fine. :)
Simple modification of the blink code to test the 2.2uf cap connection from GND and RESET. The image shows the counter was not reset no matter how many times I connected/disconnected from the serial line but pressing the button caused a reset back to 1.
/*
Blink
Turns on an LED on for one second, then off for one second, repeatedly.
This example code is in the public domain.
*/
// a simple counter to show the number and it betting reset when the reset button is pressed but not when you connect or disconnect from the serial.
int counter = 0;
void setup() {
// initialize the digital pin as an output.
// Pin 13 has an LED connected on most Arduino boards:
pinMode(13, OUTPUT);
// create a serial connection with a speed of 9600
Serial.begin(9600);
}
void loop() {
// increment the counter to show it's working
counter++;
// print the counter to the serial connection
Serial.println(counter, DEC);
digitalWrite(13, HIGH); // set the LED on
delay(1000); // wait for a second
digitalWrite(13, LOW); // set the LED off
delay(1000); // wait for a second
}
#define SCK 52
#define MISO 50
#define MOSI 51
#define RESET 53
Now i found it i wanted to help other people that are also struggling.
I also posted a the high resolution version of the picture how to hook up the arduino. Please post ur experiences when you try this whit you're mega.
Gr. Spike
I only have one instructable using the arduino...probably have more soon...
why not have a look at my ibles?!
Nice guitar hero mod , i jut got guitar hero on pc but the keyboard sux.
I need to look for some buttons so i can make me an arduino guitar hero controller.