pre_key.bsf

增加有去抖模块等的fpga控制矩阵键盘的源代码及RTL级的模块图

/*
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) 1991-2008 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 from 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 "symbol" (version "1.1"))
(symbol
	(rect 16 16 152 112)
	(text "pre_key" (rect 5 0 51 14)(font "Arial" (font_size 8)))
	(text "inst" (rect 8 80 25 92)(font "Arial" ))
	(port
		(pt 0 32)
		(input)
		(text "keyin" (rect 0 0 29 14)(font "Arial" (font_size 8)))
		(text "keyin" (rect 21 27 50 41)(font "Arial" (font_size 8)))
		(line (pt 0 32)(pt 16 32)(line_width 1))
	)
	(port
		(pt 0 48)
		(input)
		(text "clk_sam" (rect 0 0 46 14)(font "Arial" (font_size 8)))
		(text "clk_sam" (rect 21 43 67 57)(font "Arial" (font_size 8)))
		(line (pt 0 48)(pt 16 48)(line_width 1))
	)
	(port
		(pt 136 32)
		(output)
		(text "key_h" (rect 0 0 34 14)(font "Arial" (font_size 8)))
		(text "key_h" (rect 81 27 115 41)(font "Arial" (font_size 8)))
		(line (pt 136 32)(pt 120 32)(line_width 1))
	)
	(port
		(pt 136 48)
		(output)
		(text "key_l" (rect 0 0 29 14)(font "Arial" (font_size 8)))
		(text "key_l" (rect 86 43 115 57)(font "Arial" (font_size 8)))
		(line (pt 136 48)(pt 120 48)(line_width 1))
	)
	(drawing
		(rectangle (rect 16 16 120 80)(line_width 1))
	)
)