Fx2lafw

fx2lafw is an open-source firmware for Cypress FX2 chips which makes them usable as simple logic analyzer hardware.

It is licensed under the terms of the GNU GPL (version 2, or later) and written in C, using sdcc as compiler, and fx2lib as helper library.

Note: This is work in progress. It does NOT work, yet!

Hardware overview

The fx2lafw firmware is meant to work on any FX2-based hardware, including logic analyzers, FX2 eval boards, or other hardware which has this chip on-board.

Here's a quick overview of some of the relevant hardware information we have about the various devices:

Device	Probes (pins)	Crystal	FX2 package	Buffer/ESD-protection	Resistor per probe	I2C EEPROM
Saleae Logic	8 (PB0-PB7)	24MHz	56PVXC (SSOP)	ST DVIULC6-4SC6	? Ω	?
EE Electronics XLA ESLA100	8 (PB0-PB7)	24MHz	56LFXC (QFN)	NXP 74HC245D	100 Ω	Atmel ATMLH911 02B 1
CWAV USBee SX	8 (PB0-PB7)	24MHz	56PVXC (SSOP)	none	560 Ω	Microchip 24LC01B
Lcsoft Mini Board	24 (PA0-PA7, PB0-PB7, PD0-PD7)	24MHz	56PVXC (SSOP)	none	none	Shenzhen First-Rank Technology T24C128A

Download

$ git clone git://sigrok.git.sourceforge.net/gitroot/sigrok/fx2lafw

Building

$ cd fx2lafw
$ git clone git://github.com/mulicheng/fx2lib.git
$ make

Usage

$ cycfx2prog -id=vvvv:pppp prg:build/fx2lafw.ihx reset run delay:100

You have to provide the USB VID/PID of the FX2 device (before firmware upload) using the -id parameter.

Resources

• sdcc (C compiler for 8051 microcontrollers, usable for FX2)
• fx2lib: SF project page, blog article, github repo, mailing list
• Cypress FX2 docs:
  • CY7C68013A, CY7C68014A, CY7C68015A, CY7C68016A datasheet (PDF)
  • EZ-USB Technical Reference Manual (TRM) (PDF)
  • EZ-USB FX2LP appnotes
  • EZ-USB FX2LP errata
  • GPIF Designer (Windows software, requires login)
    • CY3681 EZ-USB FX2 Development Kit (GPIF designer downloadable without login)