Updating Atmega162 VCDS and other interfaces

[rsibiza]

Hi Guys.

Here i wanna continue something i allready started one time,and hope it will be alive some more time.

Explaining how to update,upgrade a VCDS interface,or other tools using Atmega162.

What should you know about the atmega162?

It may possible that reading flash an eprom from it is locked by FUSES...so if your atmega is locked by LOCKFUSE...only an external paralel programmer can reset this FUSE by High Voltage Paralel Programming (HVPP)...you should unsolder atmega162 from PCB before doing HVPP,because normally your atmega and components runs 3-5 volt...HVPP uses 12-13,5 V to programm and can damage components on PCB.

Here 2 different Interfaces,which i used to erase/reset FUSES

[onomaepitheto]

very good tutorial

[rsibiza]

Wiring up the Atmega.

Simpliest way to flash atmega is ISP programming,you can use ISP6 or ISP10 pinheader interfaces.

I use normally the USBASP Programmer from:

USBASP AVR Programmer - $16.00

it has ISP10 connector...

For correct connection,you need on atmega
MOSI pin1 on atmega pin1 on USBASP
MISO pin2............... pin9
VCC pin6................. pin2
GND pin16 .............. pin4
RESET pin4.............. pin5
SCK pin3 ................ pin7

If you try read or write atmega162 off PCB,you will need add an 7,2 mhz clock between Pin 14-15,XTAL1 and XTAL2...without clock you will be unable to connect to atmega...

You can also choose other clock rating(1MHZ) but atmega wont work properly inside vcds interface...as it is connected to 7,2...

[rsibiza]

In the attached Word document,you can check how to use Khazama,to write flash and eprom to atmega162 for use in VCDS interface.

If you connect correct,and atmega is recognised correct and you have trouble writing it,uncheck in write options all cases,and do step by step by yourself.



Set Fuses and Lockbits....write Fuses and Lockbits
Load eprom data,write eprom data
Load flash data,write Flash data
Verify Flash
Verify Eprom

To be sure always start by Command: read chipsignature

If you cant read:

Maybee SPIEN FUSE is not set,can be done only by HVPP
You missed correct wiring up
Offboard need to add Clock to XTAL1

[rsibiza]

Here a pic of a TQFP44 to DIP and ISP6 ISP10

I bought it from Virtual Village...but was crap.
Needet to cut 5 tracks and change way by wires to do correct switch from TQFP to DIP and be able programming on paralell programmer.

On HVPP and External paralell Programmer no need for clock to XTAL1

[rsibiza]

I really apreciate Khazama to write Atmega162,but sometimes on different atmega...khazama fails...on board..in this case i often use the extremeburner...which clearly can be used with same programmer as explained some posts before...unplug USBASP replug open extremeburner and try again...as explained in attach.

[nany]

hello, is it possible to update the china vcds with this methode

[rsibiza]

hello, is it possible to update the china vcds with this methode

Yes. The original one makes update only by USB,after installing new updated vcds.

[jarripote]

Very good!!, thank you very much

[rsibiza]

This "interface" can be built by everybody himself at Home,and be used on old PC with Paralell Port(DB25) together with Ponyprog software.

Ponyprog is freeware.

But i prefer USB Programmers


When you have no connection,try decrementing resistors until 0... The resistors are not for protecting Atmega....they are there for protecting Paralell Port...so check all wires if everything fine before powering up.

[potel]

What should you know about the atmega162?

It may possible that reading flash an eprom from it is locked by FUSES...so if your atmega is locked by LOCKFUSE...only an external paralel programmer can reset this FUSE by High Voltage Paralel Programming (HVPP)...

This process might ruin the content of flash and eeprom also, right?
Tell me I'm wrong, please!

[bladezz]

Good!!, thank you

[rsibiza]

This process might ruin the content of flash and eeprom also, right?
Tell me I'm wrong, please!

On External Paralell programmer,you normally can enable SPIEN Fuse without destroying flash and eeprom content,if LOCKFUSES are not set.

If LOCKFUSES are set,you need first erase entire memory in flash and eprom before enabling SPIEN is possible.

But depending on programmer,checked FUSE can be enabled or disabled...you need check the bit...

[zoro1]

If the lock are present yоu mast erase flash and eeprom.Is the *.hex file for the Atmega available?

[potel]

...depending on programmer,checked FUSE can be enabled or disabled...you need check the bit...

Can you please 'elaborate' a bit on it? That might be VERY interesting (and not at all offtopic).
Have you particularly managed to program fuses (e.g. EESAV) on a locked atmega without destroying content of eeprom area? Could be possible?
Thank you.