USB programming

Question

I want to program a microcontroller (AVR) to control some leds through USB. It\'s just out of interest in how to build and program USB devices. There are some AVR microcontrolle

Answer 1

I wonder whether your AVB acts as a host or device. I guess your board is a usb device and you need to light the leds on your board. So, it may be a good way to initialize your board as a HID device. To achieve this goal, you need a HID gadget software stack running on your board. References as follows:

1. gadget framework in uboot
2. HID specefication usb org
3. debug tools such as USB Protocol Analyzer
4. libusb running on Host PC to send packets