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// ============================================================================
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// ============================================================================
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// 2006-2011 Robert Finch
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// (C) 2006-2011 Robert Finch
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// robfinch@<remove>sympatico.ca
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// robfinch@<remove>opencores.org
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//
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//
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// rtfTextController.v
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// rtfTextController.v
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// text controller
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// text controller
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//
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//
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// This source code is available for evaluation and validation purposes
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// This source file is free software: you can redistribute it and/or modify
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// only. This copyright statement and disclaimer must remain present in
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// it under the terms of the GNU Lesser General Public License as published
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// the file.
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// by the Free Software Foundation, either version 3 of the License, or
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//
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// (at your option) any later version.
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//
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//
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// NO WARRANTY.
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// This source file is distributed in the hope that it will be useful,
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// THIS Work, IS PROVIDEDED "AS IS" WITH NO WARRANTIES OF ANY KIND, WHETHER
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// EXPRESS OR IMPLIED. The user must assume the entire risk of using the
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// Work.
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// GNU General Public License for more details.
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//
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//
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// IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR ANY
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// You should have received a copy of the GNU General Public License
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// INCIDENTAL, CONSEQUENTIAL, OR PUNITIVE DAMAGES WHATSOEVER RELATING TO
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// along with this program. If not, see <http://www.gnu.org/licenses/>.
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// THE USE OF THIS WORK, OR YOUR RELATIONSHIP WITH THE AUTHOR.
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//
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// IN ADDITION, IN NO EVENT DOES THE AUTHOR AUTHORIZE YOU TO USE THE WORK
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// IN APPLICATIONS OR SYSTEMS WHERE THE WORK'S FAILURE TO PERFORM CAN
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// REASONABLY BE EXPECTED TO RESULT IN A SIGNIFICANT PHYSICAL INJURY, OR IN
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// LOSS OF LIFE. ANY SUCH USE BY YOU IS ENTIRELY AT YOUR OWN RISK, AND YOU
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// AGREE TO HOLD THE AUTHOR AND CONTRIBUTORS HARMLESS FROM ANY CLAIMS OR
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// LOSSES RELATING TO SUCH UNAUTHORIZED USE.
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//
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//
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//
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//
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// Text Controller
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// Text Controller
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//
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//
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// FEATURES
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// FEATURES
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//
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//
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// The core includes an embedded dual port RAM to hold the screen
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// The core includes an embedded dual port RAM to hold the screen
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// characters.
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// characters.
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//
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//
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//
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//
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// Window Co-ordinates
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//--------------------------------------------------------------------
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// 0: LEF - left
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// Registers
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// [11: 0] horizontal position (hctr value)
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//
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// [15:14] size of horizontal pixels - 1 in clock cycles
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// 00 - nnnnnnnn number of columns (horizontal displayed number of characters)
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// [ 13] text screen enable
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// 01 - nnnnnnnn number of rows (vertical displayed number of characters)
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// 1: TOP - top
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// 02 - n nnnnnnnn window left (horizontal sync position - reference for left edge of displayed)
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// [10: 0] vertical position (vctr value)
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// 03 - n nnnnnnnn window top (vertical sync position - reference for the top edge of displayed)
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// [15:14] size of vertical pixels in scan-lines - 1
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// 04 - ---nnnnn maximum scan line (char ROM max value is 7)
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// 2: RIG - right
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// 05 - hhhhwwww pixel size, hhhh=height,wwww=width
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// [11: 0] horizontal position (hctr value)
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// 07 - ---nnnnn color code for transparent background
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// 3: BOT - bottom
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// 08 - -BPnnnnn cursor start / blink control
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// [10: 0] vertical position (vctr value)
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// BP: 00=no blink
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//
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// BP: 01=no display
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//
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// BP: 10=1/16 field rate blink
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// Webpack 9.1i xc3s1000-4ft256
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// BP: 11=1/32 field rate blink
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// 156 LUTs / 81 slices / 128.607 MHz
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// 09 - ----nnnnn cursor end
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// 3 block rams
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// 10 - aaaaaaaa aaaaaaaaa start address (index into display memory)
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// 1 multiplier
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// 11 - aaaaaaaa aaaaaaaaa cursor position
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// 12 - aaaaaaaa aaaaaaaaa light pen position
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//--------------------------------------------------------------------
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//
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//
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// ============================================================================
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// ============================================================================
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`define DEBUG 1
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module rtfTextController(
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module FF_TextController(
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rst_i, clk_i,
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rst_i, clk_i,
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cyc_i, stb_i, ack_o, we_i, sel_i, adr_i, dat_i, dat_o,
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cyc_i, stb_i, ack_o, we_i, sel_i, adr_i, dat_i, dat_o,
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lp, curpos,
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lp, curpos,
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vclk, eol, eof, blank, border, rgbIn, rgbOut
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vclk, eol, eof, blank, border, rgbIn, rgbOut
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);
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);
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output reg [24:0] rgbOut; // output pixel stream
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output reg [24:0] rgbOut; // output pixel stream
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wire [23:0] bkColor24; // background color
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wire [23:0] bkColor24; // background color
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wire [23:0] fgColor24; // foreground color
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wire [23:0] fgColor24; // foreground color
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wire [23:0] tcColor24; // transparent color
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wire pix; // pixel value from character generator 1=on,0=off
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wire pix; // pixel value from character generator 1=on,0=off
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reg [15:0] rego;
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reg [15:0] rego;
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reg [11:0] windowTop;
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reg [11:0] windowTop;
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reg [15:0] penAddr;
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reg [15:0] penAddr;
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wire [8:0] txtOut; // character code
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wire [8:0] txtOut; // character code
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wire [7:0] charOut; // character ROM output
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wire [7:0] charOut; // character ROM output
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wire [3:0] txtBkCode; // background color code
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wire [3:0] txtBkCode; // background color code
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wire [4:0] txtFgCode; // foreground color code
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wire [4:0] txtFgCode; // foreground color code
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reg [4:0] txtTcCode; // transparent color code
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reg bgt;
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wire [8:0] tdat_o;
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wire [8:0] tdat_o;
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wire [8:0] cdat_o;
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wire [8:0] cdat_o;
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wire [7:0] chdat_o;
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wire [7:0] chdat_o;
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// text screen RAM
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// text screen RAM
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syncRam4kx9_1rw1r textRam0
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syncRam4kx9_1rw1r textRam0
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(
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(
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.wclk(clk_i),
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.wclk(clk_i),
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.wadr(adr_i[12:1]),
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.wadr(adr_i[13:1]),
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.i(dat_i),
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.i(dat_i),
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.wo(tdat_o),
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.wo(tdat_o),
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.wce(cs_text),
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.wce(cs_text),
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.we(we_i),
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.we(we_i),
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.wrst(1'b0),
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.wrst(1'b0),
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.rclk(vclk),
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.rclk(vclk),
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.radr(txtAddr[11:0]),
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.radr(txtAddr[12:0]),
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.o(txtOut),
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.o(txtOut),
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.rce(ld_shft),
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.rce(ld_shft),
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.rrst(1'b0)
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.rrst(1'b0)
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);
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);
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// screen attribute RAM
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// screen attribute RAM
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syncRam4kx9_1rw1r colorRam0
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syncRam4kx9_1rw1r colorRam0
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(
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(
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.wclk(clk_i),
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.wclk(clk_i),
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.wadr(adr_i[12:1]),
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.wadr(adr_i[13:1]),
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.i(dat_i),
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.i(dat_i),
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.wo(cdat_o),
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.wo(cdat_o),
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.wce(cs_color),
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.wce(cs_color),
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.we(we_i),
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.we(we_i),
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.wrst(1'b0),
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.wrst(1'b0),
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.rclk(vclk),
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.rclk(vclk),
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.radr(txtAddr[11:0]),
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.radr(txtAddr[12:0]),
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.o({txtBkCode,txtFgCode}),
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.o({txtBkCode,txtFgCode}),
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.rce(ld_shft),
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.rce(ld_shft),
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.rrst(1'b0)
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.rrst(1'b0)
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);
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);
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// Register read port
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// Register read port
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//- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
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//- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
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always @(cs_reg or cursorPos or penAddr or adr_i)
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always @(cs_reg or cursorPos or penAddr or adr_i)
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if (cs_reg) begin
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if (cs_reg) begin
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case(adr_i[4:1])
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case(adr_i[4:1])
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4'd0: rego <= numCols;
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4'd1: rego <= numRows;
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4'd11: rego <= cursorPos;
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4'd11: rego <= cursorPos;
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4'd12: rego <= penAddr;
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4'd12: rego <= penAddr;
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default: rego <= 16'h0000;
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default: rego <= 16'h0000;
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endcase
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endcase
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end
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end
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//- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
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//- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
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reg interlace;
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reg interlace;
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always @(posedge clk_i)
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always @(posedge clk_i)
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if (rst_i) begin
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if (rst_i) begin
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// 104x65
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// 104x63
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// windowTop <= 12'd20;
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/*
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// windowLeft <= 12'd284;
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windowTop <= 12'd26;
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// pixelWidth <= 4'd0;
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windowLeft <= 12'd260;
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// pixelHeight <= 4'd1; // 525 pixels (408 with border)
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pixelWidth <= 4'd0;
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pixelHeight <= 4'd1; // 525 pixels (408 with border)
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*/
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// 52x31
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// 52x31
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windowTop <= 12'd14;
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windowTop <= 12'd14;
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windowLeft <= 12'd117;
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windowLeft <= 12'd117;
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pixelWidth <= 4'd1;
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pixelWidth <= 4'd1;
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pixelHeight <= 4'd3; // 262 pixels (248 with border)
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pixelHeight <= 4'd3; // 262 pixels (248 with border)
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numCols <= COLS;
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numCols <= COLS;
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numRows <= ROWS;
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numRows <= ROWS;
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maxScanline <= 5'd7;
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maxScanline <= 5'd7;
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maxScanpix <= 5'd7;
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maxScanpix <= 5'd7;
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rBlink <= 3'b111; // 01 = non display
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rBlink <= 3'b111; // 01 = non display
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startAddress <= 16'h0000;
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startAddress <= 16'h0000;
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cursorStart <= 5'd00;
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cursorStart <= 5'd00;
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cursorEnd <= 5'd31;
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cursorEnd <= 5'd31;
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cursorPos <= 16'h0003;
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cursorPos <= 16'h0003;
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txtTcCode <= 5'd31;
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end
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end
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else begin
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else begin
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cursorPos <= curpos;
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if (cs_reg & we_i) begin // register write ?
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if (cs_reg & we_i) begin // register write ?
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case(adr_i[4:1])
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case(adr_i[4:1])
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4'd00: numCols <= dat_i; // horizontal displayed
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4'd00: numCols <= dat_i; // horizontal displayed
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4'd04: maxScanline <= dat_i[4:0];
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4'd04: maxScanline <= dat_i[4:0];
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4'd05: begin
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4'd05: begin
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pixelHeight <= dat_i[7:4];
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pixelHeight <= dat_i[7:4];
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pixelWidth <= dat_i[3:0]; // horizontal pixel width
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pixelWidth <= dat_i[3:0]; // horizontal pixel width
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end
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end
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4'd07: txtTcCode <= dat_i[4:0];
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4'd08: begin
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4'd08: begin
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cursorStart <= dat_i[4:0]; // scan line sursor starts on
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cursorStart <= dat_i[4:0]; // scan line sursor starts on
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rBlink <= dat_i[7:5];
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rBlink <= dat_i[7:5];
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end
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end
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4'd09: cursorEnd <= dat_i[4:0]; // scan line cursor ends on
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4'd09: cursorEnd <= dat_i[4:0]; // scan line cursor ends on
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.ld_n(1'b1),
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.ld_n(1'b1),
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.d(6'd0),
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.d(6'd0),
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.q(bcnt)
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.q(bcnt)
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);
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);
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wire blink_en = (cursorPos==txtAddr+3) && (scanline[4:0] >= cursorStart) && (scanline[4:0] <= cursorEnd);
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wire blink_en = (cursorPos==txtAddr+2) && (scanline[4:0] >= cursorStart) && (scanline[4:0] <= cursorEnd);
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VT151 ub2
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VT151 ub2
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(
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(
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.e_n(!blink_en),
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.e_n(!blink_en),
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.s(rBlink),
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.s(rBlink),
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Line 459... |
);
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);
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// These tables map a five bit color code to an eight bit color value.
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// These tables map a five bit color code to an eight bit color value.
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rtfColorROM ucm1 (.clk(vclk), .ce(nhp & ld_shft), .code(txtBkCode1), .color(bkColor24) );
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rtfColorROM ucm1 (.clk(vclk), .ce(nhp & ld_shft), .code(txtBkCode1), .color(bkColor24) );
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rtfColorROM ucm2 (.clk(vclk), .ce(nhp & ld_shft), .code(txtFgCode1), .color(fgColor24) );
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rtfColorROM ucm2 (.clk(vclk), .ce(nhp & ld_shft), .code(txtFgCode1), .color(fgColor24) );
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always @(posedge vclk)
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if (nhp & ld_shft)
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bgt <= {1'b0,txtBkCode1}==txtTcCode;
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// Convert character bitmap to pixels
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// Convert character bitmap to pixels
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// For convenience, the character bitmap data in the ROM is in the
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// For convenience, the character bitmap data in the ROM is in the
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// opposite bit order to what's needed for the display. The following
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// opposite bit order to what's needed for the display. The following
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Line 514... |
casex({blank,iblank,border,bpix,pix})
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casex({blank,iblank,border,bpix,pix})
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5'b1xxxx: rgbOut <= 25'h0000000;
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5'b1xxxx: rgbOut <= 25'h0000000;
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5'b01xxx: rgbOut <= rgbIn;
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5'b01xxx: rgbOut <= rgbIn;
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5'b0010x: rgbOut <= 24'hBF2020;
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5'b0010x: rgbOut <= 24'hBF2020;
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5'b0011x: rgbOut <= 24'hDFDFDF;
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5'b0011x: rgbOut <= 24'hDFDFDF;
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5'b000x0: rgbOut <= bkColor24;
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5'b000x0: rgbOut <= bgt ? rgbIn : bkColor24;
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5'b000x1: rgbOut <= fgColor24;
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5'b000x1: rgbOut <= fgColor24;
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default: rgbOut <= rgbIn;
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default: rgbOut <= rgbIn;
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endcase
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endcase
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end
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end
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