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.

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)	FX2 package	Buffer/ESD-protection	Resistor per probe	I2C EEPROM	Support Status
Braintechnology USB-LPS	16	56PVXC (SSOP)	none	? 68 Ω	Atmel ATML0816 TINY13 20SU	TODO
CWAV BusBee	4	?	?	? Ω	?	TODO
CWAV USBee AX	8 digital (PB0-PB7), 1 analog (PD0-PD7)	?	?	? Ω	?	BASIC SUPPORT
CWAV USBee DX	16 digital, 2 analog	?	?	? Ω	?	TODO
CWAV USBee EX2	8	?	?	? Ω	?	TODO
CWAV USBee SX	8 (PB0-PB7)	56PVXC (SSOP)	none	560 Ω	Microchip 24LC01B	TODO
CWAV USBee ZX	8 (PB0-PB7)	?	?	? Ω	?	TODO
EE Electronics XLA ESLA100	8 (PB0-PB7)	56LFXC (QFN)	NXP 74HC245D	100 Ω	Atmel ATMLH911 02B 1	WIP
EE Electronics ESLA201A	8 digital (PB0-PB7), 1 analog (PD0-PD7)	56LFXC (QFN)	none	100 Ω	Atmel ATMLH113	BASIC SUPPORT
Lcsoft Mini Board	16 (PB0-PB7, PD0-PD7)	56PVXC (SSOP)	none	none	Shenzhen First-Rank Technology T24C128A	TODO
Saleae Logic	8 (PB0-PB7)	56PVXC (SSOP)	ST DVIULC6-4SC6	? Ω	?	WIP
Robomotic MiniLogic	8 (PB0-PB7)	?	?	?	?	TODO

Download

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

Useage

Building sigrok

• Build and install latest git head sigrok for your platform: Linux
  • When building libsigrok, instead of ./configure do

$ ./configure --enable-fx2lafw --disable-saleae-logic

• • Follow all other steps as normal

Install udev Rules

These steps prevent the need to run sigrok as superuser.

• Copy the udev rules from sigrok/libsigrok/contrib/z60_libsigrok.rules to /etc/udev/rules.d/
• Restart udev: sudo /etc/init.d/udev restart

Building fx2lafw

$ cd fx2lafw
$ git clone git://github.com/mulicheng/fx2lib.git
$ make
$ sudo cp build/*.fw /usr/local/share/libsigrok/firmware/

Where /usr/local is your installation prefix.

Test

$ sigrok-cli -D

If everything has worked, sigrok can now see your fx2lafw device, ready for use.

TODO

• Digital Sampling
  • 8-channel
  • 16-channel
• Analogue Sampling
  • 1-channel
  • 2-channel
  • Voltage Meter
• Triggering
• Trigger Pin
• Clock Input
• Clock Output
• Frequency/Pulse Counter

Resources

• Browse Source Code
• 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)