snaketop.bdf

利用VHDL语言编写的一个蛇形的程序

/*
WARNING: Do NOT edit the input and output ports in this file in a text
editor if you plan to continue editing the block that represents it in
the Block Editor! File corruption is VERY likely to occur.
*/
/*
Copyright (C) 1991-2005 Altera Corporation
Your use of Altera Corporation's design tools, logic functions 
and other software and tools, and its AMPP partner logic       
functions, and any output files any of the foregoing           
(including device programming or simulation files), and any    
associated documentation or information are expressly subject  
to the terms and conditions of the Altera Program License      
Subscription Agreement, Altera MegaCore Function License       
Agreement, or other applicable license agreement, including,   
without limitation, that your use is for the sole purpose of   
programming logic devices manufactured by Altera and sold by   
Altera or its authorized distributors.  Please refer to the    
applicable agreement for further details.
*/
(header "graphic" (version "1.3"))
(pin
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	(rect 0 112 168 128)
	(text "INPUT" (rect 133 0 161 10)(font "Arial" (font_size 6)))
	(text "clk" (rect 5 0 19 12)(font "Arial" ))
	(pt 168 8)
	(drawing
		(line (pt 92 12)(pt 117 12)(line_width 1))
		(line (pt 92 4)(pt 117 4)(line_width 1))
		(line (pt 121 8)(pt 168 8)(line_width 1))
		(line (pt 92 12)(pt 92 4)(line_width 1))
		(line (pt 117 4)(pt 121 8)(line_width 1))
		(line (pt 117 12)(pt 121 8)(line_width 1))
	)
	(text "VCC" (rect 136 7 156 17)(font "Arial" (font_size 6)))
)
(pin
	(input)
	(rect 80 192 248 208)
	(text "INPUT" (rect 133 0 161 10)(font "Arial" (font_size 6)))
	(text "rst" (rect 5 0 17 12)(font "Arial" ))
	(pt 168 8)
	(drawing
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		(line (pt 117 4)(pt 121 8)(line_width 1))
		(line (pt 117 12)(pt 121 8)(line_width 1))
	)
	(text "VCC" (rect 136 7 156 17)(font "Arial" (font_size 6)))
)
(pin
	(output)
	(rect 576 120 752 136)
	(text "OUTPUT" (rect 1 0 39 10)(font "Arial" (font_size 6)))
	(text "ctr[2..0]" (rect 90 0 128 12)(font "Arial" ))
	(pt 0 8)
	(drawing
		(line (pt 0 8)(pt 52 8)(line_width 1))
		(line (pt 52 4)(pt 78 4)(line_width 1))
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		(line (pt 78 12)(pt 82 8)(line_width 1))
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	(rect 576 136 752 152)
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	(text "qq[7..0]" (rect 90 0 127 12)(font "Arial" ))
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)
(symbol
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		(input)
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		(text "clk" (rect 21 27 35 39)(font "Arial" ))
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	(port
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)
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		(text "clk" (rect 21 27 35 39)(font "Arial" ))
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		(text "ctr[2..0]" (rect 69 27 107 39)(font "Arial" ))
		(line (pt 128 32)(pt 112 32)(line_width 3))
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	(drawing
		(rectangle (rect 16 16 112 80)(line_width 1))
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)
(symbol
	(rect 296 128 408 224)
	(text "snake" (rect 5 0 34 12)(font "Arial" ))
	(text "inst2" (rect 8 80 31 92)(font "Arial" ))
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		(input)
		(text "clk" (rect 0 0 14 12)(font "Arial" ))
		(text "clk" (rect 21 27 35 39)(font "Arial" ))
		(line (pt 0 32)(pt 16 32)(line_width 1))
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	(port
		(pt 0 48)
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		(text "rst" (rect 0 0 12 12)(font "Arial" ))
		(text "rst" (rect 21 43 33 55)(font "Arial" ))
		(line (pt 0 48)(pt 16 48)(line_width 1))
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)
(connector
	(pt 280 160)
	(pt 296 160)
)
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