Upload error in Adafruit pro trinket

Hi there!

I'm trying to upload in a brand new pro trinket a simple code, but I got this error:

avrdude: usbdev_open(): did not find any USB device "usb"

I have already install the Arduino IDE with the support of adafruit boards.

I also try different options of prommamer, such as "Arduino as ISP"

Any suggestions?

Thank you

Install the trinket drivers - it sounds like windows can't see it. You might get better response on the Adafruit forums; I don't hear people mentioning the trinket here much.

You probably forgot to press the reset button. The Pro Trinket requires 2 quick presses of the button before upload.