connecting microcontroler and computer with usb comunication

There are many advantages to connecting hardware via the Universal
Serial Bus (USB), but there are also many obstacles to be overcome. In
this series of articles, we provide you with a map to help you find your
way along the stony path of developing USB applications.

DIY hardware for the PC is usually connected to the serial RS232 interface. After several decades of use, this interface is very well documented and easy to use. Of course, it also has certain disadvantages One of these is that you can only connect a device to
it before booting the PC, and another is that powering an attached circuit from the serial interface is awkward (and only a small amount of power can be drawn this way).
The USB interface is free of these disadvantages. However, most users
– including experienced PC hobbyists – know little or nothing about
the USB interface. The objective of this series of article is to enable you to connect homemade USB devices to a PC. The key factor here is that almost everything you need can be downloaded from the Internet for free.
There are three elements to the development of a peripheral USB circuit:
1. The hardware and a program that runs in the USB IC.
2. A program that communicates with the USB IC and displays responses on the screen.
3. A device driver (SYS file) that provides communication between the
USB port and the program.

connecting microcontroler and computer with usb comunication

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