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/////////////////////////////////////////////////////////////////////////// |
// |
// Filename: wbicapetwo.v |
// |
// Project: Wishbone to ICAPE2 interface conversion |
// |
// Purpose: This routine maps the configuration registers of a 7-series |
// Xilinx part onto register addresses on a wishbone bus interface |
// via the ICAPE2 access port to those parts. The big thing this |
// captures is the timing and handshaking required to read and |
// write registers from the configuration interface. |
// |
// As an example of what can be done, writing a 32'h00f to |
// local address 5'h4 sends the IPROG command to the FPGA, causing |
// it to immediately reconfigure itself. |
// |
// As another example, the warm boot start address is located |
// in register 5'h10. Writing to this address, followed by |
// issuing the IPROG command just mentioned will cause the |
// FPGA to configure from that warm boot start address. |
// |
// For more details on the configuration interface, the registers |
// in question, their meanings and what they do, please see |
// User's Guide 470, the "7 Series FPGAs Configuration" User |
// Guide. |
// |
// Notes: This module supports both reads and writes from the ICAPE2 |
// interface. These follow the following pattern. |
// |
// For writes: |
// (Idle) 0xffffffff (Dummy) |
// (CS/W) 0x20000000 NOOP |
// (CS/W) 0xaa995566 SYNC WORD |
// (CS/W) 0x20000000 NOOP |
// (CS/W) 0x20000000 NOOP |
// (CS/W) ... Write command |
// (CS/W) ... Write value, from Wishbone bus |
// (CS/W) 0x20000000 NOOP |
// (CS/W) 0x20000000 NOOP |
// (CS/W) 0x30008001 Write to CMD register (address 4) |
// (CS/W) 0x0000000d DESYNC command |
// (CS/W) 0x20000000 NOOP |
// (CS/W) 0x20000000 NOOP |
// (Idle) |
// |
// and for reads: |
// (Idle) 0xffffffff (Dummy) |
// (CS/W) 0x20000000 NOOP |
// (CS/W) 0xaa995566 SYNC WORD |
// (CS/W) 0x20000000 NOOP |
// (CS/W) 0x20000000 NOOP |
// (CS/W) ... Read command |
// (CS/W) 0x20000000 NOOP |
// (CS/W) 0x20000000 NOOP |
// (Idle) 0x20000000 (Idle the interface again, so we can rd) |
// (CS/R) 0x20000000 (Wait) |
// (CS/R) 0x20000000 (Wait) |
// (CS/R) 0x20000000 (Wait) |
// (CS/R) 0x20000000 (Wait) |
// (Idle) 0x20000000 (Idle the interface before writing) |
// (CS/W) 0x20000000 NOOP |
// (CS/W) 0x20000000 NOOP |
// (CS/W) 0x30008001 Write to CMD register (address 4) |
// (CS/W) 0x0000000d DESYNC command |
// (CS/W) 0x20000000 NOOP |
// (CS/W) 0x20000000 NOOP |
// (Idle) |
// Creator: Dan Gisselquist, Ph.D. |
// Gisselquist Tecnology, LLC |
// |
/////////////////////////////////////////////////////////////////////////// |
// |
// Copyright (C) 2015, Gisselquist Technology, LLC |
// |
// This program is free software (firmware): you can redistribute it and/or |
// modify it under the terms of the GNU General Public License as published |
// by the Free Software Foundation, either version 3 of the License, or (at |
// your option) any later version. |
// |
// This program is distributed in the hope that it will be useful, but WITHOUT |
// ANY WARRANTY; without even the implied warranty of MERCHANTIBILITY or |
// FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
// for more details. |
// |
// License: GPL, v3, as defined and found on www.gnu.org, |
// http://www.gnu.org/licenses/gpl.html |
// |
// |
/////////////////////////////////////////////////////////////////////////// |
// |
`define MBOOT_IDLE 5'h00 |
`define MBOOT_START 5'h01 |
`define MBOOT_READ 5'h06 |
`define MBOOT_WRITE 5'h0f |
`define MBOOT_DESYNC 5'h11 |
module wbicapetwo(i_clk, |
i_wb_cyc, i_wb_stb, i_wb_we, i_wb_addr, i_wb_data, |
o_wb_ack, o_wb_stall, o_wb_data); |
input i_clk; |
// Wishbone inputs |
input i_wb_cyc, i_wb_stb, i_wb_we; |
input [4:0] i_wb_addr; |
input [31:0] i_wb_data; |
// Wishbone outputs |
output reg o_wb_ack, o_wb_stall; |
output reg [31:0] o_wb_data; |
// ICAPE2 interface signals |
// These are kept internal to this block ... |
|
reg wb_req, r_we; |
reg [31:0] r_data; |
reg [4:0] r_addr; |
|
reg [31:0] cfg_in; |
reg cfg_cs_n, cfg_rdwrn; |
wire [31:0] cfg_out; |
reg [4:0] state; |
initial state = `MBOOT_IDLE; |
initial cfg_cs_n = 1'b1; |
always @(posedge i_clk) |
begin |
o_wb_ack <= 1'b0; |
o_wb_stall <= 1'b1; |
state <= state + 5'h01; |
wb_req <= wb_req & i_wb_cyc; |
case(state) |
`MBOOT_IDLE: begin |
cfg_cs_n <= 1'b1; |
cfg_rdwrn <= 1'b1; |
cfg_in <= 32'hffffffff; // Dummy word |
|
state <= `MBOOT_IDLE; |
|
o_wb_ack <= 1'b0; |
o_wb_stall <= 1'b0; |
|
r_addr <= i_wb_addr; |
r_data <= i_wb_data; |
r_we <= i_wb_we; |
if((i_wb_cyc)&&(i_wb_stb)) |
begin |
state <= `MBOOT_START; |
wb_req <= 1'b1; |
// |
o_wb_ack <= 1'b0; |
o_wb_stall <= 1'b1; |
end end |
`MBOOT_START: cfg_in <= 32'hffffffff; // NOOP |
5'h02: begin |
cfg_cs_n <= 1'b0; // Activate interface |
cfg_rdwrn <= 1'b0; |
cfg_in <= 32'h20000000; // NOOP |
end |
5'h03: cfg_in <= 32'haa995566; // Sync word |
5'h04: cfg_in <= 32'h20000000; // NOOP |
5'h05: begin |
cfg_in <= 32'h20000000; // NOOP |
state <= (r_we) ? `MBOOT_WRITE : `MBOOT_READ; |
end |
`MBOOT_READ: cfg_in <= { 8'h28, 6'h0, r_addr, 13'h001 }; |
5'h07: cfg_in <= 32'h20000000; // NOOP |
5'h08: cfg_in <= 32'h20000000; // NOOP |
5'h09: begin // Idle the interface before the read cycle |
cfg_cs_n <= 1'b1; |
cfg_rdwrn <= 1'b1; |
cfg_in <= 32'h20000000; // NOOP |
end |
5'h0a: begin // Re-activate the interface and wait 3 cycles |
cfg_cs_n <= 1'b0; |
cfg_rdwrn <= 1'b1; |
cfg_in <= 32'h20000000; // NOOP |
end |
5'h0b: // ... still waiting, cycle two |
cfg_in <= 32'h20000000; // NOOP |
5'h0c: // ... still waiting, cycle three |
cfg_in <= 32'h20000000; // NOOP |
5'h0d: // ... still waiting, cycle four |
cfg_in <= 32'h20000000; // NOOP |
5'h0e: begin // and now our answer is there |
cfg_cs_n <= 1'b1; |
cfg_rdwrn <= 1'b1; |
cfg_in <= 32'h20000000; // NOOP |
// |
// Wishbone return |
o_wb_ack <= wb_req; |
o_wb_data <= cfg_out; |
wb_req <= 1'b0; |
// |
state <= `MBOOT_DESYNC; |
end |
`MBOOT_WRITE: // Issue a write command to the given address |
cfg_in <= { 8'h30, 6'h0, r_addr, 13'h001 }; |
5'h10: cfg_in <= r_data; // Write the value |
`MBOOT_DESYNC: begin |
cfg_cs_n <= 1'b0; |
cfg_rdwrn <= 1'b0; |
cfg_in <= 32'h20000000; // 1st NOOP |
end |
5'h12: cfg_in <= 32'h20000000; // 2nd NOOP |
5'h13: cfg_in <= 32'h30008001; // Write to CMD register |
5'h14: cfg_in <= 32'h0000000d; // DESYNC command |
5'h15: cfg_in <= 32'h20000000; // NOOP |
5'h16: cfg_in <= 32'h20000000; // NOOP |
5'h17: begin |
// Acknowledge the bus transaction, it is now complete |
o_wb_ack <= wb_req; |
o_wb_stall <= 1'b0; |
wb_req <= 1'b0; |
// |
cfg_cs_n <= 1'b1; |
cfg_rdwrn <= 1'b0; |
cfg_in <= 32'hffffffff; // DUMMY |
// |
state <= `MBOOT_IDLE; |
end |
default: begin |
o_wb_ack <= 1'b0; |
o_wb_stall <= 1'b1; |
cfg_cs_n <= 1'b1; |
cfg_rdwrn <= 1'b0; |
state <= `MBOOT_IDLE; |
cfg_in <= 32'hffffffff; // DUMMY WORD |
end |
endcase |
end |
|
genvar k; |
// |
// The data registers to the ICAPE2 interface are bit swapped within |
// each byte. Thus, in order to read from or write to the interface, |
// we need to bit swap the bits in each byte. These next lines |
// accomplish that for both the input and output ports. |
// |
wire [31:0] bit_swapped_cfg_in; |
generate |
for(k=0; k<8; k=k+1) |
begin |
assign bit_swapped_cfg_in[ k] = cfg_in[ 7-k]; |
assign bit_swapped_cfg_in[ 8+k] = cfg_in[ 8+7-k]; |
assign bit_swapped_cfg_in[16+k] = cfg_in[16+7-k]; |
assign bit_swapped_cfg_in[24+k] = cfg_in[24+7-k]; |
end endgenerate |
|
wire [31:0] bit_swapped_cfg_out; |
generate |
for(k=0; k<8; k=k+1) |
begin |
assign cfg_out[ k] = bit_swapped_cfg_out[ 7-k]; |
assign cfg_out[ 8+k] = bit_swapped_cfg_out[ 8+7-k]; |
assign cfg_out[16+k] = bit_swapped_cfg_out[16+7-k]; |
assign cfg_out[24+k] = bit_swapped_cfg_out[24+7-k]; |
end endgenerate |
|
ICAPE2 #(.ICAP_WIDTH("X32")) reconfig(.CLK(i_clk), |
.CSIB(cfg_cs_n), .RDWRB(cfg_rdwrn), |
.I(bit_swapped_cfg_in), .O(bit_swapped_cfg_out)); |
endmodule |
/trunk/doc/spec.pdf
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Index: trunk/doc/src/gpl-3.0.tex
===================================================================
--- trunk/doc/src/gpl-3.0.tex (nonexistent)
+++ trunk/doc/src/gpl-3.0.tex (revision 2)
@@ -0,0 +1,719 @@
+\documentclass[11pt]{article}
+
+\title{GNU GENERAL PUBLIC LICENSE}
+\date{Version 3, 29 June 2007}
+
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+\maketitle
+
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+{\parindent 0in
+
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+
+\bigskip
+Everyone is permitted to copy and distribute verbatim copies of this
+
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+
+\end{center}
+
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+modified object code on the User Product (for example, the work has
+been installed in ROM).
+
+The requirement to provide Installation Information does not include a
+requirement to continue to provide support service, warranty, or updates
+for a work that has been modified or installed by the recipient, or for
+the User Product in which it has been modified or installed. Access to a
+network may be denied when the modification itself materially and
+adversely affects the operation of the network or violates the rules and
+protocols for communication across the network.
+
+Corresponding Source conveyed, and Installation Information provided,
+in accord with this section must be in a format that is publicly
+documented (and with an implementation available to the public in
+source code form), and must require no special password or key for
+unpacking, reading or copying.
+
+\item Additional Terms.
+
+``Additional permissions'' are terms that supplement the terms of this
+License by making exceptions from one or more of its conditions.
+Additional permissions that are applicable to the entire Program shall
+be treated as though they were included in this License, to the extent
+that they are valid under applicable law. If additional permissions
+apply only to part of the Program, that part may be used separately
+under those permissions, but the entire Program remains governed by
+this License without regard to the additional permissions.
+
+When you convey a copy of a covered work, you may at your option
+remove any additional permissions from that copy, or from any part of
+it. (Additional permissions may be written to require their own
+removal in certain cases when you modify the work.) You may place
+additional permissions on material, added by you to a covered work,
+for which you have or can give appropriate copyright permission.
+
+Notwithstanding any other provision of this License, for material you
+add to a covered work, you may (if authorized by the copyright holders of
+that material) supplement the terms of this License with terms:
+ \begin{enumerate}
+ \item Disclaiming warranty or limiting liability differently from the
+ terms of sections 15 and 16 of this License; or
+
+ \item Requiring preservation of specified reasonable legal notices or
+ author attributions in that material or in the Appropriate Legal
+ Notices displayed by works containing it; or
+
+ \item Prohibiting misrepresentation of the origin of that material, or
+ requiring that modified versions of such material be marked in
+ reasonable ways as different from the original version; or
+
+ \item Limiting the use for publicity purposes of names of licensors or
+ authors of the material; or
+
+ \item Declining to grant rights under trademark law for use of some
+ trade names, trademarks, or service marks; or
+
+ \item Requiring indemnification of licensors and authors of that
+ material by anyone who conveys the material (or modified versions of
+ it) with contractual assumptions of liability to the recipient, for
+ any liability that these contractual assumptions directly impose on
+ those licensors and authors.
+ \end{enumerate}
+
+All other non-permissive additional terms are considered ``further
+restrictions'' within the meaning of section 10. If the Program as you
+received it, or any part of it, contains a notice stating that it is
+governed by this License along with a term that is a further
+restriction, you may remove that term. If a license document contains
+a further restriction but permits relicensing or conveying under this
+License, you may add to a covered work material governed by the terms
+of that license document, provided that the further restriction does
+not survive such relicensing or conveying.
+
+If you add terms to a covered work in accord with this section, you
+must place, in the relevant source files, a statement of the
+additional terms that apply to those files, or a notice indicating
+where to find the applicable terms.
+
+Additional terms, permissive or non-permissive, may be stated in the
+form of a separately written license, or stated as exceptions;
+the above requirements apply either way.
+
+\item Termination.
+
+You may not propagate or modify a covered work except as expressly
+provided under this License. Any attempt otherwise to propagate or
+modify it is void, and will automatically terminate your rights under
+this License (including any patent licenses granted under the third
+paragraph of section 11).
+
+However, if you cease all violation of this License, then your
+license from a particular copyright holder is reinstated (a)
+provisionally, unless and until the copyright holder explicitly and
+finally terminates your license, and (b) permanently, if the copyright
+holder fails to notify you of the violation by some reasonable means
+prior to 60 days after the cessation.
+
+Moreover, your license from a particular copyright holder is
+reinstated permanently if the copyright holder notifies you of the
+violation by some reasonable means, this is the first time you have
+received notice of violation of this License (for any work) from that
+copyright holder, and you cure the violation prior to 30 days after
+your receipt of the notice.
+
+Termination of your rights under this section does not terminate the
+licenses of parties who have received copies or rights from you under
+this License. If your rights have been terminated and not permanently
+reinstated, you do not qualify to receive new licenses for the same
+material under section 10.
+
+\item Acceptance Not Required for Having Copies.
+
+You are not required to accept this License in order to receive or
+run a copy of the Program. Ancillary propagation of a covered work
+occurring solely as a consequence of using peer-to-peer transmission
+to receive a copy likewise does not require acceptance. However,
+nothing other than this License grants you permission to propagate or
+modify any covered work. These actions infringe copyright if you do
+not accept this License. Therefore, by modifying or propagating a
+covered work, you indicate your acceptance of this License to do so.
+
+\item Automatic Licensing of Downstream Recipients.
+
+Each time you convey a covered work, the recipient automatically
+receives a license from the original licensors, to run, modify and
+propagate that work, subject to this License. You are not responsible
+for enforcing compliance by third parties with this License.
+
+An ``entity transaction'' is a transaction transferring control of an
+organization, or substantially all assets of one, or subdividing an
+organization, or merging organizations. If propagation of a covered
+work results from an entity transaction, each party to that
+transaction who receives a copy of the work also receives whatever
+licenses to the work the party's predecessor in interest had or could
+give under the previous paragraph, plus a right to possession of the
+Corresponding Source of the work from the predecessor in interest, if
+the predecessor has it or can get it with reasonable efforts.
+
+You may not impose any further restrictions on the exercise of the
+rights granted or affirmed under this License. For example, you may
+not impose a license fee, royalty, or other charge for exercise of
+rights granted under this License, and you may not initiate litigation
+(including a cross-claim or counterclaim in a lawsuit) alleging that
+any patent claim is infringed by making, using, selling, offering for
+sale, or importing the Program or any portion of it.
+
+\item Patents.
+
+A ``contributor'' is a copyright holder who authorizes use under this
+License of the Program or a work on which the Program is based. The
+work thus licensed is called the contributor's ``contributor version''.
+
+A contributor's ``essential patent claims'' are all patent claims
+owned or controlled by the contributor, whether already acquired or
+hereafter acquired, that would be infringed by some manner, permitted
+by this License, of making, using, or selling its contributor version,
+but do not include claims that would be infringed only as a
+consequence of further modification of the contributor version. For
+purposes of this definition, ``control'' includes the right to grant
+patent sublicenses in a manner consistent with the requirements of
+this License.
+
+Each contributor grants you a non-exclusive, worldwide, royalty-free
+patent license under the contributor's essential patent claims, to
+make, use, sell, offer for sale, import and otherwise run, modify and
+propagate the contents of its contributor version.
+
+In the following three paragraphs, a ``patent license'' is any express
+agreement or commitment, however denominated, not to enforce a patent
+(such as an express permission to practice a patent or covenant not to
+sue for patent infringement). To ``grant'' such a patent license to a
+party means to make such an agreement or commitment not to enforce a
+patent against the party.
+
+If you convey a covered work, knowingly relying on a patent license,
+and the Corresponding Source of the work is not available for anyone
+to copy, free of charge and under the terms of this License, through a
+publicly available network server or other readily accessible means,
+then you must either (1) cause the Corresponding Source to be so
+available, or (2) arrange to deprive yourself of the benefit of the
+patent license for this particular work, or (3) arrange, in a manner
+consistent with the requirements of this License, to extend the patent
+license to downstream recipients. ``Knowingly relying'' means you have
+actual knowledge that, but for the patent license, your conveying the
+covered work in a country, or your recipient's use of the covered work
+in a country, would infringe one or more identifiable patents in that
+country that you have reason to believe are valid.
+
+If, pursuant to or in connection with a single transaction or
+arrangement, you convey, or propagate by procuring conveyance of, a
+covered work, and grant a patent license to some of the parties
+receiving the covered work authorizing them to use, propagate, modify
+or convey a specific copy of the covered work, then the patent license
+you grant is automatically extended to all recipients of the covered
+work and works based on it.
+
+A patent license is ``discriminatory'' if it does not include within
+the scope of its coverage, prohibits the exercise of, or is
+conditioned on the non-exercise of one or more of the rights that are
+specifically granted under this License. You may not convey a covered
+work if you are a party to an arrangement with a third party that is
+in the business of distributing software, under which you make payment
+to the third party based on the extent of your activity of conveying
+the work, and under which the third party grants, to any of the
+parties who would receive the covered work from you, a discriminatory
+patent license (a) in connection with copies of the covered work
+conveyed by you (or copies made from those copies), or (b) primarily
+for and in connection with specific products or compilations that
+contain the covered work, unless you entered into that arrangement,
+or that patent license was granted, prior to 28 March 2007.
+
+Nothing in this License shall be construed as excluding or limiting
+any implied license or other defenses to infringement that may
+otherwise be available to you under applicable patent law.
+
+\item No Surrender of Others' Freedom.
+
+If conditions are imposed on you (whether by court order, agreement or
+otherwise) that contradict the conditions of this License, they do not
+excuse you from the conditions of this License. If you cannot convey a
+covered work so as to satisfy simultaneously your obligations under this
+License and any other pertinent obligations, then as a consequence you may
+not convey it at all. For example, if you agree to terms that obligate you
+to collect a royalty for further conveying from those to whom you convey
+the Program, the only way you could satisfy both those terms and this
+License would be to refrain entirely from conveying the Program.
+
+\item Use with the GNU Affero General Public License.
+
+Notwithstanding any other provision of this License, you have
+permission to link or combine any covered work with a work licensed
+under version 3 of the GNU Affero General Public License into a single
+combined work, and to convey the resulting work. The terms of this
+License will continue to apply to the part which is the covered work,
+but the special requirements of the GNU Affero General Public License,
+section 13, concerning interaction through a network will apply to the
+combination as such.
+
+\item Revised Versions of this License.
+
+The Free Software Foundation may publish revised and/or new versions of
+the GNU General Public License from time to time. Such new versions will
+be similar in spirit to the present version, but may differ in detail to
+address new problems or concerns.
+
+Each version is given a distinguishing version number. If the
+Program specifies that a certain numbered version of the GNU General
+Public License ``or any later version'' applies to it, you have the
+option of following the terms and conditions either of that numbered
+version or of any later version published by the Free Software
+Foundation. If the Program does not specify a version number of the
+GNU General Public License, you may choose any version ever published
+by the Free Software Foundation.
+
+If the Program specifies that a proxy can decide which future
+versions of the GNU General Public License can be used, that proxy's
+public statement of acceptance of a version permanently authorizes you
+to choose that version for the Program.
+
+Later license versions may give you additional or different
+permissions. However, no additional obligations are imposed on any
+author or copyright holder as a result of your choosing to follow a
+later version.
+
+\item Disclaimer of Warranty.
+
+\begin{sloppypar}
+ THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY
+ APPLICABLE LAW. EXCEPT WHEN OTHERWISE STATED IN WRITING THE
+ COPYRIGHT HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM ``AS IS''
+ WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED OR IMPLIED,
+ INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. THE ENTIRE
+ RISK AS TO THE QUALITY AND PERFORMANCE OF THE PROGRAM IS WITH YOU.
+ SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF ALL
+ NECESSARY SERVICING, REPAIR OR CORRECTION.
+\end{sloppypar}
+
+\item Limitation of Liability.
+
+ IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN
+ WRITING WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES
+ AND/OR CONVEYS THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR
+ DAMAGES, INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL
+ DAMAGES ARISING OUT OF THE USE OR INABILITY TO USE THE PROGRAM
+ (INCLUDING BUT NOT LIMITED TO LOSS OF DATA OR DATA BEING RENDERED
+ INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD PARTIES OR A FAILURE
+ OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS), EVEN IF SUCH
+ HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH
+ DAMAGES.
+
+\item Interpretation of Sections 15 and 16.
+
+If the disclaimer of warranty and limitation of liability provided
+above cannot be given local legal effect according to their terms,
+reviewing courts shall apply local law that most closely approximates
+an absolute waiver of all civil liability in connection with the
+Program, unless a warranty or assumption of liability accompanies a
+copy of the Program in return for a fee.
+
+\begin{center}
+{\Large\sc End of Terms and Conditions}
+
+\bigskip
+How to Apply These Terms to Your New Programs
+\end{center}
+
+If you develop a new program, and you want it to be of the greatest
+possible use to the public, the best way to achieve this is to make it
+free software which everyone can redistribute and change under these terms.
+
+To do so, attach the following notices to the program. It is safest
+to attach them to the start of each source file to most effectively
+state the exclusion of warranty; and each file should have at least
+the ``copyright'' line and a pointer to where the full notice is found.
+
+{\footnotesize
+\begin{verbatim}
+
+
+Copyright (C)
+
+This program is free software: you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation, either version 3 of the License, or
+(at your option) any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with this program. If not, see .
+\end{verbatim}
+}
+
+Also add information on how to contact you by electronic and paper mail.
+
+If the program does terminal interaction, make it output a short
+notice like this when it starts in an interactive mode:
+
+{\footnotesize
+\begin{verbatim}
+ Copyright (C)
+
+This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
+This is free software, and you are welcome to redistribute it
+under certain conditions; type `show c' for details.
+\end{verbatim}
+}
+
+The hypothetical commands {\tt show w} and {\tt show c} should show
+the appropriate
+parts of the General Public License. Of course, your program's commands
+might be different; for a GUI interface, you would use an ``about box''.
+
+You should also get your employer (if you work as a programmer) or
+school, if any, to sign a ``copyright disclaimer'' for the program, if
+necessary. For more information on this, and how to apply and follow
+the GNU GPL, see \texttt{http://www.gnu.org/licenses/}.
+
+The GNU General Public License does not permit incorporating your
+program into proprietary programs. If your program is a subroutine
+library, you may consider it more useful to permit linking proprietary
+applications with the library. If this is what you want to do, use
+the GNU Lesser General Public License instead of this License. But
+first, please read \texttt{http://www.gnu.org/philosophy/why-not-lgpl.html}.
+
+\end{enumerate}
+
+\end{document}
Index: trunk/doc/src/GT.eps
===================================================================
--- trunk/doc/src/GT.eps (nonexistent)
+++ trunk/doc/src/GT.eps (revision 2)
@@ -0,0 +1,94 @@
+%!PS-Adobe-3.0 EPSF-3.0
+%%BoundingBox: 0 0 504 288
+%%Creator: Gisselquist Technology LLC
+%%Title: Gisselquist Technology Logo
+%%CreationDate: 11 Mar 2014
+%%EndComments
+%%BeginProlog
+/black { 0 setgray } def
+/white { 1 setgray } def
+/height { 288 } def
+/lw { height 8 div } def
+%%EndProlog
+% %%Page: 1
+
+false { % A bounding box
+ 0 setlinewidth
+ newpath
+ 0 0 moveto
+ 0 height lineto
+ 1.625 height mul lw add 0 rlineto
+ 0 height neg rlineto
+ closepath stroke
+} if
+
+true { % The "G"
+ newpath
+ height 2 div 1.25 mul height moveto
+ height 2 div height 4 div sub height lineto
+ 0 height 3 4 div mul lineto
+ 0 height 4 div lineto
+ height 4 div 0 lineto
+ height 3 4 div mul 0 lineto
+ height height 4 div lineto
+ height height 2 div lineto
+ %
+ height lw sub height 2 div lineto
+ height lw sub height 4 div lw 2 div add lineto
+ height 3 4 div mul lw 2 div sub lw lineto
+ height 4 div lw 2 div add lw lineto
+ lw height 4 div lw 2 div add lineto
+ lw height 3 4 div mul lw 2 div sub lineto
+ height 4 div lw 2 div add height lw sub lineto
+ height 2 div 1.25 mul height lw sub lineto
+ closepath fill
+ newpath
+ height 2 div height 2 div moveto
+ height 2 div 0 rlineto
+ 0 height 2 div neg rlineto
+ lw neg 0 rlineto
+ 0 height 2 div lw sub rlineto
+ height 2 div height 2 div lw sub lineto
+ closepath fill
+} if
+
+height 2 div 1.25 mul lw add 0 translate
+false {
+ newpath
+ 0 height moveto
+ height 0 rlineto
+ 0 lw neg rlineto
+ height lw sub 2 div neg 0 rlineto
+ 0 height lw sub neg rlineto
+ lw neg 0 rlineto
+ 0 height lw sub rlineto
+ height lw sub 2 div neg 0 rlineto
+ 0 lw rlineto
+ closepath fill
+} if
+
+true { % The "T" of "GT".
+ newpath
+ 0 height moveto
+ height lw add 2 div 0 rlineto
+ 0 height neg rlineto
+ lw neg 0 rlineto
+ 0 height lw sub rlineto
+ height lw sub 2 div neg 0 rlineto
+ closepath fill
+
+ % The right half of the top of the "T"
+ newpath
+ % (height + lw)/2 + lw
+ height lw add 2 div lw add height moveto
+ % height - (above) = height - height/2 - 3/2 lw = height/2-3/2lw
+ height 3 lw mul sub 2 div 0 rlineto
+ 0 lw neg rlineto
+ height 3 lw mul sub 2 div neg 0 rlineto
+ closepath fill
+} if
+
+
+grestore
+showpage
+%%EOF
Index: trunk/doc/src/gqtekspec.cls
===================================================================
--- trunk/doc/src/gqtekspec.cls (nonexistent)
+++ trunk/doc/src/gqtekspec.cls (revision 2)
@@ -0,0 +1,296 @@
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%/
+%
+% Copyright (C) 2015, Gisselquist Technology, LLC
+%
+% This template is free software: you can redistribute it and/or modify it
+% under the terms of the GNU General Public License as published by the
+% Free Software Foundation, either version 3 of the License, or (at your
+% option) any later version.
+%
+% This template is distributed in the hope that it will be useful, but WITHOUT
+% ANY WARRANTY; without even the implied warranty of MERCHANTIBILITY or
+% FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
+% for more details.
+%
+% You should have received a copy of the GNU General Public License along
+% with this program. If not, see for a copy.
+%
+% License: GPL, v3, as defined and found on www.gnu.org,
+% http://www.gnu.org/licenses/gpl.html
+%
+%
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+% \NeedsTeXFormat{LaTeX2e}[1995/12/01]
+\ProvidesClass{gqtekspec}[2015/03/03 v0.1 -- Gisselquist Technology Specification]
+\typeout{by Dan Gisselquist}
+\LoadClassWithOptions{report}
+\usepackage{datetime}
+\usepackage{graphicx}
+\usepackage[dvips]{pstricks}
+\usepackage{hhline}
+\usepackage{colortbl}
+\newdateformat{headerdate}{\THEYEAR/\twodigit{\THEMONTH}/\twodigit{\THEDAY}}
+\setlength{\hoffset}{0.25in}
+\setlength{\voffset}{-0.5in}
+\setlength{\marginparwidth}{0in}
+\setlength{\marginparsep}{0in}
+\setlength{\textwidth}{6in}
+\setlength{\oddsidemargin}{0in}
+
+% **************************************
+% * APPENDIX *
+% **************************************
+%
+\newcommand\appfl@g{\appendixname} %used to test \@chapapp
+%
+% \renewcommand\appendix{\par\clearpage
+ % \setcounter{chapter}{0}%
+ % \setcounter{section}{0}%
+ % \renewcommand\@chapapp{\appendixname}%
+ % \renewcommand\thechapter{\Alph{chapter}}
+ % \if@nosectnum\else
+ % \renewcommand\thesection{\Alph{chapter}.\arabic{section}}
+ % \fi
+% }
+
+
+% FIGURE
+% redefine the @caption command to put a period after the figure or
+% table number in the lof and lot tables
+\long\def\@caption#1[#2]#3{\par\addcontentsline{\csname
+ ext@#1\endcsname}{#1}{\protect\numberline{\csname
+ the#1\endcsname.}{\ignorespaces #2}}\begingroup
+ \@parboxrestore
+ \normalsize
+ \@makecaption{\csname fnum@#1\endcsname}{\ignorespaces #3}\par
+ \endgroup}
+
+% ****************************************
+% * TABLE OF CONTENTS, ETC. *
+% ****************************************
+
+\renewcommand\contentsname{Contents}
+\renewcommand\listfigurename{Figures}
+\renewcommand\listtablename{Tables}
+
+\newif\if@toc \@tocfalse
+\renewcommand\tableofcontents{%
+ \begingroup% temporarily set if@toc so that \@schapter will not
+ % put Table of Contents in the table of contents.
+ \@toctrue
+ \chapter*{\contentsname}
+ \endgroup
+ \thispagestyle{gqtekspecplain}
+
+ \baselineskip=10pt plus .5pt minus .5pt
+
+ {\raggedleft Page \par\vskip-\parskip}
+ \@starttoc{toc}%
+ \baselineskip=\normalbaselineskip
+ }
+
+\def\l@appendix{\pagebreak[3]
+ \vskip 1.0em plus 1pt % space above appendix line
+ \@dottedtocline{0}{0em}{8em}}
+
+\def\l@chapter{\pagebreak[3]
+ \vskip 1.0em plus 1pt % space above appendix line
+ \@dottedtocline{0}{0em}{4em}}
+
+% \if@nosectnum\else
+ % \renewcommand\l@section{\@dottedtocline{1}{5.5em}{2.4em}}
+ % \renewcommand\l@subsection{\@dottedtocline{2}{8.5em}{3.2em}}
+ % \renewcommand\l@subsubsection{\@dottedtocline{3}{11em}{4.1em}}
+ % \renewcommand\l@paragraph{\@dottedtocline{4}{13.5em}{5em}}
+ % \renewcommand\l@subparagraph{\@dottedtocline{5}{16em}{6em}}
+% \fi
+
+% LIST OF FIGURES
+%
+\def\listoffigures{%
+ \begingroup
+ \chapter*{\listfigurename}%
+ \endgroup
+ \thispagestyle{gqtekspecplain}%
+
+ \baselineskip=10pt plus .5pt minus .5pt%
+
+ {\hbox to \hsize{Figure\hfil Page} \par\vskip-\parskip}%
+
+ \rule[2mm]{\textwidth}{0.5mm}\par
+
+ \@starttoc{lof}%
+ \baselineskip=\normalbaselineskip}%
+
+\def\l@figure{\@dottedtocline{1}{1em}{4.0em}}
+
+% LIST OF TABLES
+%
+\def\listoftables{%
+ \begingroup
+ \chapter*{\listtablename}%
+ \endgroup
+ \thispagestyle{gqtekspecplain}%
+ \baselineskip=10pt plus .5pt minus .5pt%
+ {\hbox to \hsize{Table\hfil Page} \par\vskip-\parskip}%
+
+ % Added line underneath headings, 20 Jun 01, Capt Todd Hale.
+ \rule[2mm]{\textwidth}{0.5mm}\par
+
+ \@starttoc{lot}%
+ \baselineskip=\normalbaselineskip}%
+
+\let\l@table\l@figure
+
+% ****************************************
+% * PAGE STYLES *
+% ****************************************
+%
+\def\ps@gqtekspectoc{%
+ \let\@mkboth\@gobbletwo
+ \def \@oddhead{}
+ \def \@oddfoot{\rm
+ \hfil\raisebox{-9pt}{\thepage}\hfil\thispagestyle{gqtekspectocn}}
+ \let \@evenhead\@oddhead \let \@evenfoot\@oddfoot}
+\def\ps@gqtekspectocn{\let\@mkboth\@gobbletwo
+ \def \@oddhead{\rm \hfil\raisebox{10pt}{Page}}
+ \def \@oddfoot{\rm
+ \hfil\raisebox{-9pt}{\thepage}\hfil\thispagestyle{gqtekspectocn}}
+ \let \@evenhead\@oddhead \let \@evenfoot\@oddfoot}
+
+\def\ps@gqtekspeclof{\let\@mkboth\@gobbletwo
+ \def \@oddhead{}
+ \def \@oddfoot{\rm
+ \hfil\raisebox{-9pt}{\thepage}\hfil\thispagestyle{gqtekspeclofn}}
+ \let \@evenhead\@oddhead \let \@evenfoot\@oddfoot}
+\def\ps@gqtekspeclofn{\let\@mkboth\@gobbletwo
+ \def \@oddhead{\rm
+ \parbox{\textwidth}{\raisebox{0pt}{Figure}\hfil\raisebox{0pt}{Page} %
+ \raisebox{20pt}{\rule[10pt]{\textwidth}{0.5mm}} }}
+
+ \def \@oddfoot{\rm
+ \hfil\raisebox{-9pt}{\thepage}\hfil\thispagestyle{gqtekspeclofn}}
+ \let \@evenhead\@oddhead \let \@evenfoot\@oddfoot}
+
+\def\ps@gqtekspeclot{\let\@mkboth\@gobbletwo
+ \def \@oddhead{}
+ \def \@oddfoot{\rm
+ \hfil\raisebox{-9pt}{\thepage}\hfil\thispagestyle{gqtekspeclotn}}
+ \let \@evenhead\@oddhead \let \@evenfoot\@oddfoot}
+\def\ps@gqtekspeclotn{\let\@mkboth\@gobbletwo
+ \def \@oddhead{\rm
+ \parbox{\textwidth}{\raisebox{0pt}{Table}\hfil\raisebox{0pt}{Page} %
+ \raisebox{20pt}{\rule[10pt]{\textwidth}{0.5mm}} }}
+
+ \def \@oddfoot{\rm
+ \hfil\raisebox{-9pt}{\thepage}\hfil\thispagestyle{gqtekspeclotn}}
+ \let \@evenhead\@oddhead \let \@evenfoot\@oddfoot}
+
+\def\ps@gqtekspecplain{\let\@mkboth\@gobbletwo
+ \def \@oddhead{\rput(0,-2pt){\psline(0,0)(\textwidth,0)}\rm \hbox to 1in{\includegraphics[height=0.8\headheight]{GT.eps} Gisselquist Technology, LLC}\hfil\hbox{\@title}\hfil\hbox to 1in{\hfil\headerdate\@date}}
+ \def \@oddfoot{\rput(0,9pt){\psline(0,0)(\textwidth,0)}\rm \hbox to 1in{www.opencores.com\hfil}\hfil\hbox{\r@vision}\hfil\hbox to 1in{\hfil{\thepage}}}
+ \let \@evenhead\@oddhead \let \@evenfoot\@oddfoot}
+
+% \def\author#1{\def\auth@r{#1}}
+% \def\title#1{\def\ti@tle{#1}}
+
+\def\logo{\begin{pspicture}(0,0)(5.67in,0.75in)
+ \rput[lb](0.05in,0.10in){\includegraphics[height=0.75in]{GT.eps}}
+ \rput[lb](1.15in,0.05in){\scalebox{1.8}{\parbox{2.0in}{Gisselquist\\Technology, LLC}}}
+ \end{pspicture}}
+% TITLEPAGE
+%
+\def\titlepage{\setcounter{page}{1}
+ \typeout{^^JTitle Page.}
+ \thispagestyle{empty}
+ \leftline{\rput(0,0){\psline(0,0)(\textwidth,0)}\hfill}
+ \vskip 2\baselineskip
+ \logo\hfil % Original is 3.91 in x 1.26 in, let's match V thus
+ \vskip 2\baselineskip
+ \vspace*{10pt}\vfil
+ \begin{minipage}{\textwidth}\raggedleft
+ \ifproject{\Huge\bfseries\MakeUppercase\@project} \\\fi
+ \vspace*{15pt}
+ {\Huge\bfseries\MakeUppercase\@title} \\
+ \vskip 10\baselineskip
+ \Large \@author \\
+ \ifemail{\Large \@email}\\\fi
+ \vskip 6\baselineskip
+ \Large \usdate\@date \\
+ \end{minipage}
+ % \baselineskip 22.5pt\large\rm\MakeUppercase\ti@tle
+ \vspace*{30pt}
+ \vfil
+ \newpage\baselineskip=\normalbaselineskip}
+
+\newenvironment{license}{\clearpage\typeout{^^JLicense Page.}\ \vfill\noindent}%
+ {\vfill\newpage}
+% ****************************************
+% * CHAPTER DEFINITIONS *
+% ****************************************
+%
+\renewcommand\chapter{\if@openright\cleardoublepage\else\clearpage\fi
+ \thispagestyle{gqtekspecplain}%
+ \global\@topnum\z@
+ \@afterindentfalse
+ \secdef\@chapter\@schapter}
+\renewcommand\@makechapterhead[1]{%
+ \hbox to \textwidth{\hfil\scalebox{1.8}{\Huge\bfseries \thechapter.}}\vskip 10\p@
+ \hbox to \textwidth{\rput(0,0){\psline[linewidth=0.04in](0,0)(\textwidth,0)}}\vskip \p@
+ \hbox to \textwidth{\rput(0,0){\psline[linewidth=0.04in](0,0)(\textwidth,0)}}\vskip 10\p@
+ \hbox to \textwidth{\hfill\scalebox{1.8}{\huge\bfseries #1}}%
+ \par\nobreak\vskip 40\p@}
+\renewcommand\@makeschapterhead[1]{%
+ \hbox to \textwidth{\hfill\scalebox{1.8}{\huge\bfseries #1}}%
+ \par\nobreak\vskip 40\p@}
+% ****************************************
+% * INITIALIZATION *
+% ****************************************
+%
+% Default initializations
+
+\ps@gqtekspecplain % 'gqtekspecplain' page style with lowered page nos.
+\onecolumn % Single-column.
+\pagenumbering{roman} % the first chapter will change pagenumbering
+ % to arabic
+\setcounter{page}{1} % in case a titlepage is not requested
+ % otherwise titlepage sets page to 1 since the
+ % flyleaf is not counted as a page
+\widowpenalty 10000 % completely discourage widow lines
+\clubpenalty 10000 % completely discourage club (orphan) lines
+\raggedbottom % don't force alignment of bottom of pages
+
+\date{\today}
+\newif\ifproject\projectfalse
+\def\project#1{\projecttrue\gdef\@project{#1}}
+\def\@project{}
+\newif\ifemail\emailfalse
+\def\email#1{\emailtrue\gdef\@email{#1}}
+\def\@email{}
+\def\revision#1{\gdef\r@vision{#1}}
+\def\r@vision{}
+\def\at{\makeatletter @\makeatother}
+\newdateformat{theyear}{\THEYEAR}
+\newenvironment{revisionhistory}{\clearpage\typeout{^^JRevision History.}%
+ \hbox to \textwidth{\hfil\scalebox{1.8}{\large\bfseries Revision History}}\vskip 10\p@\noindent%
+ \begin{tabular}{|p{0.5in}|p{1in}|p{1in}|p{2.875in}|}\hline
+ \rowcolor[gray]{0.8} Rev. & Date & Author & Description\\\hline\hline}
+ {\end{tabular}\clearpage}
+\newenvironment{clocklist}{\begin{tabular}{|p{0.75in}|p{0.5in}|l|l|p{2.875in}|}\hline
+ \rowcolor[gray]{0.85} Name & Source & \multicolumn{2}{l|}{Rates (MHz)} & Description \\\hhline{~|~|-|-|~}%
+ \rowcolor[gray]{0.85} & & Max & Min & \\\hline\hline}%
+ {\end{tabular}}
+\newenvironment{reglist}{\begin{tabular}{|p{0.75in}|p{0.5in}|p{0.5in}|p{0.5in}|p{2.875in}|}\hline
+ \rowcolor[gray]{0.85} Name & Address & Width & Access & Description \\\hline\hline}%
+ {\end{tabular}}
+\newenvironment{bitlist}{\begin{tabular}{|p{0.5in}|p{0.5in}|p{3.875in}|}\hline
+ \rowcolor[gray]{0.85} Bit \# & Access & Description \\\hline\hline}%
+ {\end{tabular}}
+\newenvironment{portlist}{\begin{tabular}{|p{0.75in}|p{0.5in}|p{0.75in}|p{3.375in}|}\hline
+ \rowcolor[gray]{0.85} Port & Width & Direction & Description \\\hline\hline}%
+ {\end{tabular}}
+\newenvironment{wishboneds}{\begin{tabular}{|p{2.5in}|p{2.5in}|}\hline
+ \rowcolor[gray]{0.85} Description & Specification \\\hline\hline}%
+ {\end{tabular}}
+\newenvironment{preface}{\chapter*{Preface}}{\par\bigskip\bigskip\leftline{\hfill\@author}}
+\endinput
Index: trunk/doc/src/spec.tex
===================================================================
--- trunk/doc/src/spec.tex (nonexistent)
+++ trunk/doc/src/spec.tex (revision 2)
@@ -0,0 +1,183 @@
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+%%
+%% Filename: spec.tex
+%%
+%% Project: Wishbone to ICAPE2 interface conversion
+%%
+%% Purpose: This LaTeX file contains all of the documentation/description
+%% currently provided with this FPGA Real-time Clock Core.
+%% It's not nearly as interesting as the PDF file it creates,
+%% so I'd recommend reading that before diving into this file.
+%% You should be able to find the PDF file in the SVN distribution
+%% together with this PDF file and a copy of the GPL-3.0 license
+%% this file is distributed under. If not, just type 'make'
+%% in the doc directory and it (should) build without a problem.
+%%
+%%
+%% Creator: Dan Gisselquist
+%% Gisselquist Technology, LLC
+%%
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+%%
+%% Copyright (C) 2015, Gisselquist Technology, LLC
+%%
+%% This program is free software (firmware): you can redistribute it and/or
+%% modify it under the terms of the GNU General Public License as published
+%% by the Free Software Foundation, either version 3 of the License, or (at
+%% your option) any later version.
+%%
+%% This program is distributed in the hope that it will be useful, but WITHOUT
+%% ANY WARRANTY; without even the implied warranty of MERCHANTIBILITY or
+%% FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
+%% for more details.
+%%
+%% You should have received a copy of the GNU General Public License along
+%% with this program. (It's in the $(ROOT)/doc directory, run make with no
+%% target there if the PDF file isn't present.) If not, see
+%% for a copy.
+%%
+%% License: GPL, v3, as defined and found on www.gnu.org,
+%% http://www.gnu.org/licenses/gpl.html
+%%
+%%
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+\documentclass{gqtekspec}
+\project{Real-Time Clock}
+\title{Specification}
+\author{Dan Gisselquist, Ph.D.}
+\email{dgisselq\at opencores.org}
+\revision{Rev.~0.1}
+\begin{document}
+\pagestyle{gqtekspecplain}
+\titlepage
+\begin{license}
+Copyright (C) \theyear\today, Gisselquist Technology, LLC
+
+This project is free software (firmware): you can redistribute it and/or
+modify it under the terms of the GNU General Public License as published
+by the Free Software Foundation, either version 3 of the License, or (at
+your option) any later version.
+
+This program is distributed in the hope that it will be useful, but WITHOUT
+ANY WARRANTY; without even the implied warranty of MERCHANTIBILITY or
+FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
+for more details.
+
+You should have received a copy of the GNU General Public License along
+with this program. If not, see \hbox{ } for a
+copy.
+\end{license}
+\begin{revisionhistory}
+0.1 & 5/25/2015 & Gisselquist & First Draft \\\hline
+\end{revisionhistory}
+% Revision History
+% Table of Contents, named Contents
+\tableofcontents
+% \listoffigures
+\listoftables
+\begin{preface}
+My thanks to those helpers on the Xilinx Forum who helped me get the final
+step to getting this working.
+\end{preface}
+
+\chapter{Introduction}
+\pagenumbering{arabic}
+\setcounter{page}{1}
+
+This core makes the ICAPE2 FPGA configuration registers available to be read
+or written from a wishbone bus. As the documentation of this capability could
+use a bit to be desired, I have put this file together to help document
+what works.
+
+The interface itself is very valuable for a couple of purposes---from my humble
+and personal perspective. The first is the user configurable watchdog timer
+which can be used to automatically reset an FPGA after it locks up. The second
+is the warm boot start capability, which makes it possible to create a fall
+back configuration image and test it without compromising the ability of the
+FPGA to be started in a known good image. The third valuable capability is that
+of commanding a reconfiguration. All of these capabilities are available
+through this interface. Further details are available from Xilinx's "7-Series
+FPGAs Configuration" User Guide.
+
+This introduction is the first chapter. Beyond this introduction, most
+of the capabilities are documented elsewhere. Hence, the register chapter
+will be omitted and the reader will be gently pointed to the User's Guide.
+This leaves the Wishbone chapter and the I/O Port's chapter which follow.
+
+As always, write me if you have any questions or problems.
+
+\chapter{Architecture}\label{chap:arch}
+
+If I understand correctly, every one of Xilinx's 7--Series FPGA's contains
+two ICAPE2 interface modules. These modules allow user logic to communicate
+with the configuration interface of the chip. This interface, however, isn't
+well documented. According to the User's Guide, it matches the SelectMAP
+interface, yet in practice \ldots it doesn't.
+
+This core encapsulates the difficulty of matching that interface. Register
+addresses match those in the User's Guide, as do register definitions.
+
+\chapter{Operation}\label{chap:ops}
+
+Consider the warm boot reload operation. To do this, write the address in
+configuration memory of an FPGA image to the warm boot start address (WBSTAR).
+In this case, that is address 5'h10 within this interface. A second write to
+the configuration command address (CMD), 5'h4 in this interface, will issue the
+IPROG command to the FPGA and cause it to configure itself from the address
+you just gave it.
+
+There, wasn't that simple?
+
+Now I can, from the comfort of my home, reconfigure an FPGA in my office without
+needing to press the power button or connect to a JTAG cable. Not bad, no?
+
+\chapter{Wishbone Datasheet}\label{chap:wishbone}
+Tbl.~\ref{tbl:wishbone}
+\begin{table}[htbp]
+\begin{center}
+\begin{wishboneds}
+Revision level of wishbone & WB B4 spec \\\hline
+Type of interface & Slave, Read/Write \\\hline
+Port size & 32--bit \\\hline
+Port granularity & 32--bit \\\hline
+Maximum Operand Size & 32--bit \\\hline
+Data transfer ordering & (Irrelevant) \\\hline
+Clock constraints & See the Datasheet for your part\\\hline
+Signal Names & \begin{tabular}{ll}
+ Signal Name & Wishbone Equivalent \\\hline
+ {\tt i\_clk} & {\tt CLK\_I} \\
+ {\tt i\_wb\_cyc} & {\tt CYC\_I} \\
+ {\tt i\_wb\_stb} & {\tt STB\_I} \\
+ {\tt i\_wb\_we} & {\tt WE\_I} \\
+ {\tt i\_wb\_addr} & {\tt ADR\_I} \\
+ {\tt i\_wb\_data} & {\tt DAT\_I} \\
+ {\tt o\_wb\_ack} & {\tt ACK\_O} \\
+ {\tt o\_wb\_stall} & {\tt STALL\_O} \\
+ {\tt o\_wb\_data} & {\tt DAT\_O}
+ \end{tabular}\\\hline
+\end{wishboneds}
+\caption{Wishbone Datasheet}\label{tbl:wishbone}
+\end{center}\end{table}
+is required by the wishbone specification, and so
+it is included here. The big thing to notice is that this ICAPE2 interface
+acts as a wishbone slave, and that all accesses to the ICAPE2 registers become
+32--bit reads and writes to this interface. Bit ordering is the normal
+ordering where bit~31 is the most significant bit and so forth. (Bit reversal
+is accomplished internally to match Xilinx's definition.) The {\tt o\_stall}
+and {\tt o\_ack} lines are necessarily used to deal with the fact that
+operations to the device take many clocks to complete (14 for writes, 21 for
+reads), so be prepared to wait a couple of clocks for your access to complete.
+Further, the {\tt o\_ack} line will go high while the bus is stalled in many
+cases, indicating that the operation is complete but that the core is not
+yet ready to handle a subsequent request.
+
+\chapter{I/O Ports}\label{chap:ioports}
+This core offers no I/O ports beyond those of the wishbone discussed in
+Chapt.~\ref{chap:wishbone}. The I/O ports associated with the ICAPE2 interface
+are captured internally, and not brought to the output of this core.
+
+% Appendices
+% Index
+\end{document}
+
+
Index: trunk/doc/gpl-3.0.pdf
===================================================================
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svn:mime-type = application/octet-stream
Index: trunk/doc/gpl-3.0.pdf
===================================================================
--- trunk/doc/gpl-3.0.pdf (nonexistent)
+++ trunk/doc/gpl-3.0.pdf (revision 2)
trunk/doc/gpl-3.0.pdf
Property changes :
Added: svn:mime-type
## -0,0 +1 ##
+application/octet-stream
\ No newline at end of property
Index: trunk/doc/Makefile
===================================================================
--- trunk/doc/Makefile (nonexistent)
+++ trunk/doc/Makefile (revision 2)
@@ -0,0 +1,20 @@
+all: gpl-3.0.pdf spec.pdf
+DSRC := src
+
+gpl-3.0.pdf: $(DSRC)/gpl-3.0.tex
+ latex $(DSRC)/gpl-3.0.tex
+ latex $(DSRC)/gpl-3.0.tex
+ dvips -q -z -t letter -P pdf -o gpl-3.0.ps gpl-3.0.dvi
+ ps2pdf -dAutoRotatePages=/All gpl-3.0.ps gpl-3.0.pdf
+ rm gpl-3.0.dvi gpl-3.0.log gpl-3.0.aux gpl-3.0.ps
+
+spec.pdf: $(DSRC)/spec.tex $(DSRC)/gqtekspec.cls $(DSRC)/GT.eps
+ cd $(DSRC)/; latex spec.tex
+ cd $(DSRC)/; latex spec.tex
+ dvips -q -z -t letter -P pdf -o spec.ps $(DSRC)/spec.dvi
+ ps2pdf -dAutoRotatePages=/All spec.ps spec.pdf
+ rm $(DSRC)/spec.dvi $(DSRC)/spec.log
+ rm $(DSRC)/spec.aux $(DSRC)/spec.toc
+ rm $(DSRC)/spec.lot # $(DSRC)/spec.lof
+ rm spec.ps
+