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156 lines
4.4 KiB
Plaintext
156 lines
4.4 KiB
Plaintext
17 years ago
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$Id$
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SVF Player for JTAG Tools
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~~~~~~~~~~~~~~~~~~~~~~~~~
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This README describes the SVF player of the JTAG Tools software package.
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The player has been developed according to the "Serial Vector Format
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Specification", Revision E, 8 March 1999 issued by ASSET InterTech, Inc. The
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full specification can be found at
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http://www.asset-intertech.com/support/svf.pdf
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Copyright
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---------
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SVF player is copyright 2004, Arnim Laeuger.
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Parser and lexer are also copyright 2002, CDS at http://www-csd.ijs.si
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They have been reused from the "Experimental Boundary Scan" project at
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http://ebsp.sourceforge.net/
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The SVF player is free software, covered by the GNU General Public License,
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and you are welcome to change it and/or distribute copies of it under certain
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conditions. There is absolutely no warranty for this software.
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Please read the file COPYING for more info.
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Usage
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-----
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The SVF player operates on a single part in the scan chain. Therefore, you
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have to bring up the JTAG Tools software, specify a cable and detect the scan
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chain beforehand.
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The player will establish a new instruction called "SIR" and a new register
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called "SDR". They are used internally by the respective SVF commands and are
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reassigned with new values as the player advances through the file. It is not
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recommended to use them outside of the SVF player as their content is dynamic.
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Example session:
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jtag> cable ppdev /dev/parport0 DLC5
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Initializing Xilinx DLC5 JTAG Parallel Cable III on ppdev port /dev/parport0
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jtag> detect
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IR length: 5
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Chain length: 1
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Device Id: 10010000101000100000000010010011
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Manufacturer: Xilinx
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Part: XC2S300E-PQ208
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Stepping: 9
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Filename: /usr/local/share/jtag/xilinx/xc2s300e-pq208/xc2s300e-pq208
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jtag> part <desired part of the scan chain>
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jtag> svf <SVF file for selected part>
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jtag> instruction BYPASS
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jtag> part <next part>
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jtag> svf <SVF file for selected part>
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jtag> instruction BYPASS
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...
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It is recommended to set the part's instruction register to BYPASS although
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most SVF files do this at the end. By setting the instruction explicitely to
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BYPASS the output of the print command will always show meaningful
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information.
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The SVF player will issue messages when situations arise that cannot be
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handled. These messages are classified as warnings or errors depending on
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whether the player can continue operation (warning) or not (error).
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In case the TDO parameter of an SDR command leads to a mismatch the player
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issues a warning and continues. If the player should abort in this case then
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specify 'stop' at the svf command.
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Limitations and Deficiencies
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----------------------------
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Several limitations exist for the SVF player.
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It has been tested with files generated by these tools so far:
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+ Xilinx ISE WebPack 6.3.02i
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+ Altera Quartus II 4.1sp1
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Configuration for these devices has been tested so far:
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+ Xilinx Spartan-IIE, XC2S300E-PQ208
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+ Altera MAX3032, EPM3032ALC44
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+ Altera MAX3064, EPM3064ALC44
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The player has not been tested with scan chains containing more than one part.
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The implementation of some SVF commands has deficiencies.
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- HIR, HDR
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Commands not supported.
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Their functionality should be covered by the part concept of JTAG Tools.
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- PIO
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Command not supported.
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- PIOMAP
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Command not supported.
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- RUNTEST
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SCK not supported.
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The maximum time constraint is not guaranteed.
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- SIR
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Parameter SMASK is not considered.
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No check is done against the TDO parameter.
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- SDR
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Parameter SMASK is not considered.
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- TRST
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Parameters Z and ABSENT are not supported.
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- TIR, TDR
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Commands not supported.
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Their functionality should be covered by the part concept of JTAG Tools.
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Warning and error messages don't mention the line in the SVF file where the
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issue was detected.
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Operation is slowed down significantly when the FREQUENCY command has been
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specified.
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This is not a problem of the SVF player itself but seem to happen when the
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frequency of JTAG Tools is set to a value larger than 0. Configuration takes
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very long although the maximum allowed frequency is 10 MHz.
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Consider to comment out the FREQUENCY command at the beginning of the SVF
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file.
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Contact
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-------
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Sharing your experience with this software is highly welcome.
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Please direct issues either to the openwince-list mailinglist at
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http://lists.sourceforge.net/mailman/listinfo/openwince-list
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or contact me directly
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arniml <at> users.sourceforge.net
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