Hello once again!
I recently acquired a USBTinyISP.
(or a clone, i guess)
I immediately tried to read and flash an ATTiny2313 that was lying around here. After studying the 6pin ISP pinouts (it took more time than I’m willing to admit), I tried to make a breadboard circuit, and failed spectacularly. I kept getting no response from the ATTiny.
Using this image for reference
I then decided to make a vero proto circuit to connect them. It ended up being a quite decent board, and will probably come in handy.
After connecting for the first time, AVR Dude had no problem detecting my Tiny2313A using:
$ avrdude -c usbtiny -p t2313
avrdude: AVR device initialized and ready to accept instructions
Reading | ################################################## | 100% 0.01s
avrdude: Device signature = 0x1e910a
avrdude: safemode: Fuses OK
avrdude done. Thank you.
Easy connection
As you might have noticed, no COM/USB port parameter is required, since USBTinyISP is itself an independent USB device.
To flash an hex in the chip, just use:
$ avrdude -c usbtiny -p CHIP_MODEL -U flash:w:HEX_FILE.hex
Do you have an idea where i can buy a cloned USBTinyISP for less than $5? I need atleast 50 pieces.Kindly send me a link if you have any.
For $5 it’s a hard deal, but the main shop that sells them is adafruit. For 10-99 items you can get $19.80/each. The other way to do it is to try to make a deal with eBay sellers, that usually go for 10-15$ for a clone (like mine) with free shipping. I’ve had absolutely zero problems with the clone, so I guess it’s a good buy.
Thank you Pardal, I thought i could get a cloned for much cheaper than 10-15$, i will try to get through to the sellers or can you link me up with one?perhaps a name i could search for or something.
But then all is need is basically a cloned USBTinyISP, 6-pin header/cable
Compatible with Arduino ICSP (in-circuit serial programmer). nothing more, that i why i though i could get it much cheaper.
I see where you’re getting at. Usually both the Adafruit’s and the clones have 6 and 10 pin headers. The best solution in your case may be just buying one whole set, and then just make/buy your own pcb and flash the firmware in new chips (the USBTinyISP uses a 2313A itself. Or buying just the IC’s already flashed, and making/buying your own pcb’s. Or, as a last resource, flashing the IC’s and use breadboards to make the circuit itself (this is not easy, and it may cause troubles sometimes). Here are some helpfull links:
http://www.ladyada.net/make/usbtinyisp/index.html – USBTinyISP Page. It has the parts list, wiring schematics, the pcb schematics, and the IC firmware.
https://www.adafruit.com/products/54 – Just the IC already flashed
Thank you Pardal, This is very useful at this time.