From d107be2dcbeca856fc2281183d1f39d62d201a0d Mon Sep 17 00:00:00 2001 From: Dobrica Pavlinusic Date: Sun, 17 Aug 2014 20:09:38 +0200 Subject: [PATCH] removed every 2nd blank line --- readme.txt | 76 ------------------------------------------------------ 1 file changed, 76 deletions(-) diff --git a/readme.txt b/readme.txt index e22ce03..3114118 100644 --- a/readme.txt +++ b/readme.txt @@ -1,148 +1,72 @@ usb_jtag using Cypress FX2 chip - =============================== - - The code in this directory is for Cypress FX2 (e.g. CY7C68013A) and can be compiled with - the SDCC compiler (I tried version 2.6 as shipped with Ubuntu 6.10). Once I had a version - that could be compiled with Keil tools (until early 2007), but switched to SDCC because I - usually develop on a Linux host. - - No logic beside the FX2 itself and only a few external components are required for a basic - JTAG adapter. I don't have detailed schematics available; my test setup consists of a FX2 - on a custom board where it's directly connected to a Cyclone FPGA. - - ____________ - | | - | Cypress | - USB__| EZ-USB FX2 |__JTAG(TDI,TDO,TCK,TMS) - | CY7C68013A | - |____________| - __|__________ - | | - | 24 MHz XTAL | - |_____________| - - - Similar eval boards are now available from fpga4fun.com - the boards named - "Saxo-L" and "Xylo-EM" are pre-wired for use with an adapted version of my - code, while "Saxo" and "Xylo" can be used after soldering 4 extra wires: - - http://www.fpga4fun.com/board_Xylo.html - - - As is, the code assumes the following pin assignment: - - Port C.0: TDI - Port C.1: TDO - Port C.2: TCK - Port C.3: TMS - - Other assignments are possible; you'll have to adapt the definitions in hardware.h and maybe - in hardware.c, too. - - The USB identification data (vendor/product ID, strings, ...) can be modified in dscr.a51. My - firmware emulates the 128 byte EEPROM that usually holds configuration data for the FT245 and - which can be read from the host; its content is computed from the data in dscr.a51 as well. - - The WAKEUP pin should be high for the re-numeration to work reliably (thanks Jean/fpga4fun!) - - From this release on, there is new code to support running in the "Xilinx - Platform Cable USB". If you select HARDWARE=hw_xpcu_i or hw_xpcu_x at the top - of the Makefile, a firmware for the XPCU will be built. I've tested this only - with unmodified CPLD version 18 (0x12) on a Spartan-3E starter kit, as it was - programmed by my WebPack 8.2i. The code needs optimization; yet it is merely a - proof of concept. - - hw_xpcu_i: Access "internal" chain (the XPCU CPLD, IC3, itself) - hw_xpcu_x: Access "external" chain (the Spartan 3E, PROM, etc.) - - Changes since previous release on 2007-01-28: - - Initial suppport for running on Xilinx XPCU. - - New FX2 code, based on USRP2 from the GNU Radio Project; - - Firmware can now be compiled using SDCC 2.6. No more Keil support. - - EEPROM content is automatically computed from descriptors, including checksum. - - Changes since initial release on 2006-04-23: - - added this readme.txt - - reorganized my project folder: diff is now created from Subversion repository - - stripped *.dist extension from eeprom.c and dscr.a51 - - added unique proper product and vendor ID (thanks to Antti Lukats!) - - fixed checksum in eeprom.c - - added comments about AS/PS mode pins in usbjtag.c - - - - - - - -- 2.20.1