Datasheet

response as shown here:

If you get the response

avrdude: Error: Could not find USBtiny device (0x1781/0xc9f)

the bootloader is not active, make sure you see the red LED pulsing, press the reset button to start

the bootloader again.

Programming in a Blink example

For more details on using avdude and avr-gcc, you'll need to read a detailed tutorial or book on

those subjects. However, you can do a basic test by uploading the following HEX file, which will blink

the #1 LED once a second on and off. (Its a bit chunky as blink.hex's go as it has all the Arduino IDE

stuff in there too. If you wrote it in straight-C it would be like 100 bytes) - if you want to see the

source code for this, it's basically the Arduino file->examples->basics->blink demo with 1 as the

LED pin

Click the button to download it and place it in the same directory as your command prompt, in these

screenshots that's C:\Users\ladyada

trinketblink.hex

http://adafru.it/cF1

And uploading it with the command avrdude -c usbtiny -p attiny85 -U flash:w:trinketblink.hex

or, if that's giving errors, avrdude -c usbtiny -p attiny85 -D -U flash:w:trinketblink.hex (note the

extra -D)

Industries

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