Flashing

Flash AVR Net-IO with "ATMEL Evaluations-Board" made by Pollin

As a beginner it's difficult to understand everything in terms of flashing. And it's also difficult to find all information.

What's needed?

• AVR Net-IO
• ATMEL Evaluation-Board
• a 1 on 1 Cable for the ISP-Port (10-pin Connector).

Other ISP Programmers

If you have a ISP-Programmer with 6-pin port you can create an adaptor. You can see the pin configuration in figure 4-1 at page 5 AVR042: AVR Hardware Design Considerations.

Warning: Pin 4 of the 10-pin connector is not used on the Net-IO. GND has to be connected to one of the other Pins (6, 8 or 10)

Flashing with Linux

• Connect the 10-pin Cable to the ISP-Connector.
• Plug in the power adaptor of the AVR Net-IO.
• If everything is connected right, the yellow LED of the Evaluation-Board is shining.

Setting the FUSE-Bits

• Calculate the correct FUSE bits for your controller/setup - you can use http://www.engbedded.com/fusecalc/ for that
• Important: in the condition as supplied the 644 is programmed to 8 MHz internal RC-Oscillator and the clock is divided by 8 -> 1 MHz clock speed. If an external Quarz is used, the Bit CKDIV8 has to be set to 0. Also make sure that you leave Serial program downloading (SPI) enabled!
• Connect the ISP and the power.
• Set the FUSE-Bits with avrdude
• Reset the controller

Flashing the Image

After compiling the ethersex.hex you can flash it with avrdude. The following commands depend on your ISP-Programmer. This example is for a serial connection:

 avrdude -v -p m32 -c ponyser -P /dev/ttyS0 -U flash:w:ethersex.hex 

For a USB-ISP-Programmer this command should be used:

 avrdude -v -p m32 -c stk500v2 -P /dev/ttyACM0 -U flash:w:ethersex.hex

For a parallel ISP-Cable:

 avrdude -p m32 -e -c stk200 -U flash:w:ethersex.hex

Parameters for MyAVR mySmartusb light (the -e is important):

 avrdude -p m32 -e -c stk500v2  -P /dev/ttyUSB0 -U flash:w:ethersex.hex

After flashing remove the ISP-Cable and interrupt the power connection for a short time to reboot the board.

 * -p m32: ATMega32; -p m644: ATMega644
 * -v: display debug messages 
 * -c ponyser: the way avrdude speaks with the Evaluation Board; -c stkk500v2 for the Atmel board
 * -P /dev/tty.serial the serial port your programmer is connected to; -P COM1 for windows machines
 * -U the command you want to execute. In our case we want to flash: -U flash:w:ethersex.hex

Replace ATMega32 with an ATMega644, ATMega644p or ATMega1284p

ATMega644, ATMega644p and ATMega1284p have got a bigger flash then the ATMega32. This gives the possibility to add more modules to your Image.

Swapping the Microcontroller

• Disconnect power and ISP-Connector.
• Remove the old processor from your board.
• Insert the new processor while the slot is at the same position as in the socket.

Differences between ATMega32, ATMega644, ATMega644p and ATMega1284p

	ATMega32	ATMega644	ATMega644p	ATMega1284p
Housing	DIL-40	DIL-40	DIL-40	DIL-40
MHz	max. 16	max. 20	max. 20	max. 20
Flash	32 KB	64 KB	64 KB	128 KB
EEProm	1 KB	2 KB	2 KB	4 KB
RAM	2 KB	4 KB	4 KB	16 KB
I/O	32	32	32	32
PWM	4	6	6	6
ext. INT	3	32	32	32
Ser-Port	1	1	2	2

Datasheets

• AtMega32
• ATMega644
• ATMega644p
• ATMega1284p

Flashing with Windows

There a two main possibilities:

1. Flash with avrdude
2. Flash with AVR Studio

Flashing with avrdude

The flashing with avrdude is just like in Linux.

You can get the Windows-Binary as a part of WinAVR

In the command line you have to adjust the name of the serial Ports. (COMx instead of /dev/ttyxx)

avrdude -v -p m32 -c ponyser -P com3 -U flash:w:ethersex.hex 

If the programmer is connected via USB you need:

• for real USB-Programmers: libusb0.dll (Part of WinAVR)
• USB-to-Serial Converter a matching Driver: [1]

Flashing with AVR Studio

AVR Studio from Atmel offers a GUI to Controll the ISPs.

AVR Studio also brings USB-Drivers for the Programmers with it, which can be installed together with it.

For USB-to-Serial converters you need a matching Driver: [2]