Datasheet

Now you're ready to use avrdude. Open up your command line and enter in this line (but don't hit return)

avrdude -c usbtiny -p attiny85

Now plug in the Trinket into the computer's USB port and/or press the reset button to enter the bootloader. You

should see the red LED pulsing. Now press return, you should get the same 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