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GHI Electronics,LLC USBwiz User Manual

USBwiz Architecture

2.3. Commander

USBwiz uses LPC2134 UART, SPI or I2C to let the user communicate with boot loader,

Commander. All commands are entered in ASCII characters. We chose to use ASCII to

simplify troubleshooting and to allow humans to enter commands easily.

Main function of Commander is to provide user with simple tool to control USBwiz to get

the full use of its functions.

2.4. FAT File System

USBwiz can connect to two kinds of storage media types. The media types are SD/MMC

cards and USB Mass Storage devices (SCSI command subclass, bulk only protocol) which

includes thumb flash, USB hard drives and card readers. USBwiz supports three

simultaneous FAT devices. Keep in mind that all devices must be formatted FAT12, FAT16

or FAT32.

USBwiz can mount up to 3 File System Medias that are independent from each other,

which means that all opened files and operations in one file system has no effect on the

others. This gives USBwiz very great capability of flexible switching between the file

system Medias and providing other valuable functions like reading from file in one Media

and writing in another file in another media at the same time.

Some FAT File System features in USBwiz:

● Supports FAT12,FAT16, FAT32

● Can mount up to three independent File System independently

● accesses up to 4 opened files

● access unlimited subdirectory (folders) trees

● File access functions includes read, write, append, find, delete, make folder...etc.

2.5. USB Hosting

USB Host Controller

USBwiz connects to a USB host (ISP1160) through data bus. This Host Controller is

manufactured by Phillips to fit embedded system applications with USB full speed and

USB version 2.0 compatibility. It provides two USB host ports with internal root hub.

USB Driver and Host Controller Driver

USBwiz has a reliable USB driver that can fully control the traffic on ISP1160 Host

Controller.

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