This repository contains the Hardware schematic, Firmware and Software code for the ButtonGizmo device. The ButtonGizmo device is a simple, USB 1.1 Human Interface Device (HID) which functions as a custom input device. It has 8 buttons, and sends USB reports to the host (PC) whenever a button is pressed or released. The USB stack used is V-USB by Objective Development GmBH (http://www.obdev.at/vusb/)
The hardware files are contained in the "Hardware" folder above. The device is built around an ATMega328P microcontroller. It needs a 12MHz crystal and few other external components, mostly resistors. Due to certain considerations, it runs at 3.3V (via an MCP1700 regulator) and is bus-powered. For more details about the hardware considerations, see here: http://vusb.wikidot.com/hardware
The software was written in and compiled with Atmel Studio 7. Asides from the V-USB distribution files, the files of interest here are:
main.c - contains the main software code (the main() superloop and the primary application logic)
ADC.c - routines for initializing and reading from the microcontroller's ADC peripheral
ADC.h - header file containing function prototypes for ADC.c
usbconfig.h - This is part of the V-USB distribution, but it contains the configuration options for the device. Things like the VID/PID, Vendor and Product Name (needed for host-side discrimination), USB Device Class and Subclass, hardware configuration. In short, this is the file you want to pay thorough attention to.
Since this enumerates as a HID device, there are a number of options available for accessing it. The host side software is written in C#.NET, but there are USB libraries for basically every programming language out there. That said, the demo software here uses HIDSharp (because I wanted the demo to run across platforms).
The communications protocol (types and meanings of messages from the device) is documented on the Wiki.
React
Typescript
Django
Laravel
Facebook
Microsoft
Google
Alibaba
D3
Tencent