Summary of Arduino Mega-ISP Shield
This project describes a shield designed to re-burn the bootloader on any Arduino using AVRDUDE, ideal for users managing multiple Arduinos. The shield connects Arduino pins to the ATmega328P/168 for programming and includes LEDs indicating heartbeat, activity, and error states. The project is in development, with schematic and PCB files available for DIY etching. The included sketch turns an Arduino into an AVRISP programmer by defining SPI pins and LEDs for status indication. This tool facilitates easy bootloader recovery without a breadboard setup.
Parts used in the Arduino Mega-ISP Shield:
- Arduino board (ATmega328P/168)
- LEDs (3 total: Heartbeat, Activity, Error)
- Resistors (for LEDs)
- PCB or breadboard to mount components
- ISP header pins (for SPI connections: MOSI, MISO, SCK, RESET)
Use this shield to re-burn the bootloader for any arduino. You can always make one on a breadboard, but having a shield is great. This is great for people who works with lots of arduinos. You can also use it with AVRDUDE.
I will have a parts list coming soon…
(this instructable will be under development until the project is completed. Please advise thet i will not be giving support for this developing product.)
Step 1: V.0.1d (developing)
Here is the current and FIRST model. This model is just a rough sketch. The picture is bellow, tell me what you think and what needs to be improved.
Pins:
L1,2,3 are LEDs for Heartbeat, Activity and Error
Arduino > ATMEGA328P/168
GND > 8-22
13 > 19 { PB5 SCK/PCINT5 }
12 > 18 { PB4 MISO/PCINT4 }
11 > 17 { PB3 MOSI/OC2A/PCINT3 }
10 > 01 { PCINT14/RESET }
09 > L1 { E$7 + }
08 > L2 { E$8 + }
07 > L3 { E$9 + }
Go to the downloads page to get the board file for eagle. Etch it on your own and tell me if it works. I will post a tutorial on etching PCBs.
Step 2: Downloads
Here are the Eagle files…..
Schematics and PNG images are included in the ZIP files…..
d = developing
f = finalizing
RC = Possible Release Candidate
R = Rejected/Moving on to next model
v.0.1d
Notes: Schematic not included in this release…
http://www.denniskupec.com/projects/instructables/Mega-ISP-ArdShield/ARD-MEGAISP-CAD01.zip
v.0.2 coming soon….
Step 3: Sketch for Mega-ISP
// this sketch turns the Arduino into a AVRISP
// using the following pins:
// 10: slave reset
// 11: MOSI
// 12: MISO
// 13: SCK
// Put an LED (with resistor) on the following pins:
// 9: Heartbeat – shows the programmer is running
// 8: Error – Lights up if something goes wrong (use red if that makes sense)
// 7: Programming – In communication with the slave
//
// October 2009 by David A. Mellis
// – Added support for the read signature command
//
// February 2009 by Randall Bohn
// – Added support for writing to EEPROM (what took so long?)
// Windows users should consider WinAVR’s avrdude instead of the
// avrdude included with Arduino software.
//
// January 2008 by Randall Bohn
// – Thanks to Amplificar for helping me with the STK500 protocol
// – The AVRISP/STK500 (mk I) protocol is used in the arduino bootloader
// – The SPI functions herein were developed for the AVR910_ARD programmer
// – More information at http://code.google.com/p/mega-isp
For more detail: Arduino Mega-ISP Shield
