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Topic: Software reset doesn't work on my Diecimila compatible board (Read 1 time) previous topic - next topic

madworm

• Upload doesn't work? Do a loop-back test.
• There's absolutely NO excuse for not having an ISP!
• Your AVR needs a brain surgery? Use the online FUSE calculator.
My projects: RGB LED matrix, RGB LED ring, various ATtiny gadgets...
• Microsoft is not the answer. It is the question, and the answer is NO!

hhpp

Hi Lefty,

Thank you very much for your suggestion. I removed C29 and it works!!

Regards,
hhpp

retrolefty


I have attached my schematic capture.
Please let me know if you find anything wrong. Thank you Guys!


Try it without C-29. And if R-16 isn't just a piece of wire, replace it with a piece of wire.

Lefty


hhpp

I have attached my schematic capture.
Please let me know if you find anything wrong. Thank you Guys!

retrolefty


Hi,

I haved designed a board compatible with Diecimila(ATmega168). I do connect DTR pin of FTDI chip to reset pin of ATmega168. However I found that I still need to press the reset button after clicking upload icon in arduino environment.

My question is: how to upload the firmware without pressing reset button?

Thanks for any comments or suggestions.

HHPP


Many other designs also use the simple .1ufd series cap between FTDI DTR/ pin and the AVR reset pin successfully. Can you post a drawing of your design to see what might be preventing auto-reset function from working?

Lefty

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