Cypress EZ-USB (AN2131) Development

EZ-USB Resources

Data sheets for Cypress EZ-USB 2100 Series Family, 8051, development boards, firmware, etc.

Cypress EZ-USB Development Kit
Home Page for Cypress AN2131-DK001 EZ-USB Development Kit
EZ-USB Technical Reference Manual
Technical Reference for the Cypress EZ-USB 2100 Series Family
Cypress EZ-USB Development Kit
EZ-USB Development Tools which accompany Cypress AN2131-DK001 EZ-USB Development Kit. Includes evaluation version of Keil 8051 'C' compiler, firmware, and driver samples.
USB I2C/IO Board from DevaSys
A popular EZ-USB development board.
ASEM-51
An excellant freeware 8051 macro-assembler for Win32, Linux, and MS-DOS. Supports a large number of 8051 derivatives using MCU definition files, including the AN2131 and FX2.
TS Controls 8051 Simulator
A free 8051 software simulator that supports various memory models and 8052 extensions.

SimpleHID Firmware

During the development of SourceUSB, EZ-USB has been useful for emulating device features for testing. A small device framework (written in assembler) has been used to create quick prototypes.

SimpleHID uses this framework to create a minimal HID device. The device is based upon the Devasys USBI2C-IO board but it should work on other EZ-USB development boards. It has a single interrupt input report at 1 ms. interval that carries the current bus frame number (mod-16). More details follow:

Uses framework consisting of several assembler modules:
- Data.a51 - internal data definitions
- Vector.a51 - reset and interrupt vectors
- UsbJump.a51 - EZ-USB autovector table
- Reset.a51 - reset and initialization
- IntHndlrs.a51 - interrupt handlers
- SetupPkt.a51 - endpoint 0's setup packet decoder
- StdReqs.a51 - routines for processing standard requests
- HidReqs.a51 - routines for processing HID class requests
- Main.a51 - placeholder for a mainloop
- Descriptors.a51 - device, configuration, string HID
- Utils.a51 - utility routines
ASEM-51 source code.
Assembles to Intel HEX which is easily loaded on Windows systems with the LOADEZ.SYS driver which accompanies the Devasys board.

Download SimpleHID 1.00

MODHID Firmware

MODHID builds on the SimpleHID framework to create a device illustrating Microsoft OS Descriptors or MODs. MODHID adds these features:

Announces support for MODs by returning an OS_STRING for String Descriptor index 0xEE.
Supports MOD vendor command for returning a fictional extended configuration descriptor.
Supports MOD vendor command for returning an extended property descriptor.

MODs are only supported in Windows XP SP1/SP2 and Windows 2003 Server. See Microsoft OS Descriptors for details.

Download MODHID 1.00

Resources