Question about programming

tywall · Joined: 07 Aug 2014 Posts: 4

Hello

I would like programm a chip via serial using max232 something like this: http://cdn.webdca.com/avr/images/programmers/max-232.png
The problem is that i don't how what settings should i use for the programmer type and comunication

Please help

(BASCOM-AVR version : 2.0.7.7 )

bzijlstra · Posted: Thu Aug 07, 2014 3:37 pm Post subject: bootloader

Search for bootloader in this forum.

in short: the first time you have to program a small part of the flash with a bootloader. With fusebits you tell the avr to jump first to the bootloader and if nothing comes in on the serial port jump to the start of your program.

in Bascom there are commands to not overwrite this boot-area.

have fun
Ben Zijlstra

tywall · Joined: 07 Aug 2014 Posts: 4

So there is no way i can program it without buying a programmer and uploading the boot loader first?

Paulvk · Joined: 28 Jul 2006 Posts: 1257 Location: SYDNEY

Yes you have to program it with a boot loader first using a programmer

Programmers are very cheap now.

Regards Paul

tywall · Joined: 07 Aug 2014 Posts: 4

How about using this: http://wewannalearn.blogspot.com/2011/11/avr-programmer-how-to-make.html ?

EDC · Joined: 26 Mar 2014 Posts: 971

Yes. This is SIProg. I made it with PonyProg years ago and work to this time with Compaq NX9005 without external power supply Very Happy

SiProg is supported by AvrDude so for newest chips You can use Burn-O-mat Very Happy

But simplest ever programmer is. For paralel port. Four resistors needed. Sometimes people insert it without plug Hahaha directly to port.

Make sure that in BIOS port are set to EPP+ mode

Duval JP · Joined: 22 Jun 2004 Posts: 1161 Location: France

Hello,
only for some chips : you can do an atmega-arduino bootloader, but you need a arduino uno first
I find that in french : http://itechnofrance.wordpress.com/2013/04/13/construire-un-arduino/

Bascom use special programmer tools for Arduino working perfect.

bon courage
jp Wink

Arera · Joined: 23 Sep 2007 Posts: 386 Location: Wuppertal, Germany

My opinion:

As a beginner, I would not spend time and money in an "as cheap as possible" programmer. What a beginner needs is a reliable, rock solid programmer, like the AVR MK2. Imagine your first project (the flashing Led) does not work. Then you cannot be shure if the cheap programmer is to blame.
Remember: Only an exerienced craftsman can work with cheap, worn, rusty pliers...
The beginner needs the best tools he can get!

tywall · Joined: 07 Aug 2014 Posts: 4

Well i have to finish something in the next few days and i can't get a programmer on such short notice so i will have to try the serial/lpt method and hope it will work.

Robert_d1968 · Joined: 18 Dec 2012 Posts: 67 Location: America

Hello there,

I currently use a boot loader in all of my projects, you can find a couple of projects I have uploaded here.

I have since moved to a new type of IC that does not require any capacitors to run the serial port, it's of a surface mount type.

Part# DS275S made by dallas.

It works really well so far, and I will use it in all of my future projects as well...

So if you look at the colloidal silver or shutter board project, both projects you can download the code and schematics for them.
This way you can see how to use the max232 as this is what was used in them. (shutter board uses the dallas IC)

For now I'm using a surface mount ATmega8 in most projects, you can just use the ICP programming pins if you have a programmer
and you will need a programmer to get the boot loader onto the IC first, then you can program it over the serial port after that.

If you should need further help, please feel free to post it up

Robert