Typical embedded applications are rather restricted in how they can present data to a user. Limited amounts of data can be displayed on an LCD or a graphical dis- play, but large amounts of data are more problematical. Often, data is transferred via an electrical interface or via electronic storage media, such as a thumb drive, for further examination, but it can be handy to obtain an immediate snapshot of the data. The USB Printer Class, used on one of Microchip’s microcontrollers with the USB OTG peripheral, allows an embedded applica- tion to utilize a USB printer to provide hardcopy output for quick review and possible archival. AN1233 USB Printer Class on an Embedded Host Author: Kim Otten USB PRINTER CLASS Microchip Technology Inc. The “USB Device Class Definition for Printing Devices” specification, available from the USB Implementers Forum, defines the configuration, interface and INTRODUCTION endpoint descriptors, as well as the communications Typical embedded applications are rather restricted in protocol used to commun……