his Technical Brief describes a USB combination
device consisting of a mouse and a gamepad imple-mented on a PIC16C765. Previous technical briefs
describe the translation of a PS/2
mouse to a USB
mouse (TB055) and the translation of a gameport
gamepad to a USB gamepad (TB054). These two
devices were combined to form the USB combination
device described in this brief. Details about the transla-tion and implementation of the mouse and the game-pad are not covered. Refer to the earlier briefs for this
information as well as their circuit diagrams. This brief
focuses on setting up the descriptors appropriately for
a combination device. TB057
USB Combination Devices
Demonstrated by a Combination Mouse and Gamepad Device
DESCRIPTORS
Author: Reston Condit
A combination device, from the USB standpoint, is a
Company: Microchip Technology Inc. device with multiple interfaces. An interface is an end-
point or a group of endpoints that perform(s) a certain
function. Since only two endpoints a……
