URL
https://opencores.org/ocsvn/s6soc/s6soc/trunk
[/] [s6soc/] [trunk/] [rtl/] [spio.v] - Diff between revs 46 and 51
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Rev 51 |
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//
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//
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// Filename: spio.v
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// Filename: spio.v
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//
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//
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// Project: CMod S6 System on a Chip, ZipCPU demonstration project
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// Project: CMod S6 System on a Chip, ZipCPU demonstration project
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//
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//
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// Purpose:
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// Purpose: To provide a bare minimum level of access to the two on-board
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// buttons, the 4 LED's, and the external 4x4 keypad. This
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// routine does *nothing* to debounce either buttons or keypad. Any such
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// debouncing *must* be done in software. As with the rest of the S6
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// project, the goal is to keep the logic small and simple, and this
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// module is no different.
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//
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//
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// With the USB cord on top, the board facing you, LED[0] is on the left.
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// With the USB cord on top, the board facing you, LED[0] is on the left.
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//
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//
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// Creator: Dan Gisselquist, Ph.D.
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// Creator: Dan Gisselquist, Ph.D.
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// Gisselquist Technology, LLC
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// Gisselquist Technology, LLC
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end
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end
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reg [3:0] x_kp_row, r_kp_row;
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reg [3:0] x_kp_row, r_kp_row;
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reg [1:0] x_btn, r_btn;
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reg [1:0] x_btn, r_btn;
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initial x_kp_row = 4'h0;
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initial r_kp_row = 4'b0;
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initial x_btn = 2'b0;
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initial r_btn = 2'b0;
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initial o_kp_int = 1'b0;
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initial o_btn_int = 1'b0;
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always @(posedge i_clk)
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always @(posedge i_clk)
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begin
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begin
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x_kp_row <= i_kp_row;
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x_kp_row <= i_kp_row;
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x_btn <= i_btn;
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x_btn <= i_btn;
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r_kp_row <= x_kp_row;
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r_kp_row <= x_kp_row;
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