Standalone Arduino Programmer

Overview

The standalone Arduino Programmer can program many atmel chip in stand alone mode which means it does not need a computer to operate. This is very useful for automating the programming of large number of chips.

This product is a shield for the Arduino Mega.

You will need to program the Arduino Mega only once with a computer then the programmer will be stand-alone and only need connection with a power source.

The principle is:

• Program the Arduino Mega with the sketch provided below.
• Flash the target sketch on a SD card
• Insert the SD card / Connect the mega to the power supply.
• Connect the shield to the target device with the 6 pin cable.
• Press OK on the shield.
• Target is now programmed.

Features

• Onboard Micro SD card.
• 3 operation LED (work / ok / error).
• 3 operation button.
• 6 pin SPI connection to target.
• Additional GPIO pins available for expansion.
• Provision for use of a small LCD screen.

Usage

Preparing the programmer

• Compile the target sketch on Arduino IDE.
• Locate the produced hex file.
• Copy it to the SD card.
• Rename the file as 'firmware.hex'.
• Insert the SD card in the programmer.

Production Usage

• Connect the 6 pin ribbon cable to the target device.
• Press the OK button.
• Sucessful flash will be indicated with the green led 'ok'

Firmware

Several firmwares that can be used on the programmer.

Atmega_Hex_Uploader_Fixed_Filename firmware

This is the basic firmware. It allows programming with the buttons and confirmation is indicated with leds.

Download the firmware from this github repo:.

https://github.com/nickgammon/arduino_sketches

Choose the sketch named Atmega_Hex_Uploader_Fixed_Filename

A special version of SDFat library is needed. Download it from here below. Do not use the latest version of this library or compilation will fail.

https://github.com/greiman/SdFat/releases/tag/1.1.4

• Install the above library.
• Open the Atmega_Hex_Uploader_Fixed_Filename sketch in the Arduino IDE.
• Select Tools -> Board: -> Arduino AVR Boards -> Arduino Mega or Mega 2560
• Connect the Mega to the usb port.
• Click on Upload to write the programming sketch.

Usage

Only the OK button is functional. Press OK to start flashing the target. A sucessful flash will be indicated by the green LED blinking. Errors will be reported using the patterns below

Problems with SD card or programming target chip

   Red x 1 = Cannot open SD card
   Red x 2 = Cannot read file 'firmware.hex'
   Red x 3 = Cannot enter programming mode in target chip
   Red x 4 = This chip does not have a bootloader fuse
   Red x 5 = Cannot read chip signature
   Red x 6 = Unrecognised signature
   Red x 7 = Bad start address in hex file for code
   Red x 8 = Verification error

Problems with firmware.hex file

   Red+yellow x 1 = Line in file is too long
   Red+yellow x 2 = Line in file is too short
   Red+yellow x 3 = Line does not start with a colon (:)
   Red+yellow x 4 = Invalid hex digits (should be 0-9, A-F)
   Red+yellow x 5 = Bad sumcheck at end of line
   Red+yellow x 6 = Line not expected length
   Red+yellow x 7 = Unknown record type
   Red+yellow x 8 = No 'end of file' record in file
   Red+yellow x 9 = File will not fit into flash of target

Credits to the author of this firmware who documented the usage here.