2051 Serial Programmer Avr
Making your own DIY Arduino board is interesting and challenging amusement. The biggest complication is always the burning of the bootloader. Such kind of ' acts - you can not program your board through the USB because it is not preliminary programmed. The solution is known - the board must be initially programmed through its ISP interface. You can find a lot of cheap or expensive ISP programmers in the electronics stores, Ebay, Amazon.etc, but my experience learned me that the universal relatively cheap programmer able to program wide range of AVR (or PIC) chips does not exist. I have tested. It had problems with Arduino Mega (ATmega 2560), I have tested bought in Ebay.
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It was also not working with Arduino Mega. I updated the firmware with the last version - the same result. I have decided to try to find some simple and very cheap programmer to try with it.
My experience with the PIC chips told me that may be the best solution would be to find a circuit of serial programmer, working on the RS232 computer port. ATTENTION: This will work only on PC having real RS232 serial port. USB to RS232 adapters could not work.
If the port has TTL levels - it would not work also. Searching in the Internet I found the following circuit. (Copyrights: ). It is very simple and I hoped that it will be reliable. It is now time to test it! I have used the 'Ponyprog' software. It can be downloaded.
I decided to try the programmer on some more simple AVR chip, instead on ATmega2560, because if a problem appears it will difficult to find what the source is - or the microcontroller, or the programmer. For the test I have used ATmega32. How to connect the ATmega32 to program it the the ISP can be seen on the picture. To program it I have used a breadbord with supply board.
In opposite to the USB AVR programmers, which can provide the power supply for the programmed chip, this programmer requires that the chip is supplied by an external power supply. This supply also must be connected to the 'VTG' pin of the programmer. Hi, take a look here; First check if the chip you want to program is in the list of the supported by ponyprog chips. Be sure that you have real RS232 port (+/- 15V) Perform steps 5-8 from the instructable.
2051 Serial Programmer Avr Software
Check the correctness of the setup you use. Using ohmmeter you could check also the correctness of the device you have made - is any short connection inside, or missing connection? You can try with other target chip (simple memory or other supported chip only to be sure that the programmer is functional.and after that perform thr previous task. I hope soon you will find the reason. Please reply. Regards Milen.