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https://opencores.org/ocsvn/ps2/ps2/trunk
[/] [ps2/] [tags/] [rel_6/] [bench/] [verilog/] [ps2_keyboard_model.v] - Diff between revs 10 and 24
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//////////////////////////////////////////////////////////////////////
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//////////////////////////////////////////////////////////////////////
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//
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//
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// CVS Revision History
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// CVS Revision History
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//
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//
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// $Log: not supported by cvs2svn $
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// $Log: not supported by cvs2svn $
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// Revision 1.2 2002/04/09 13:15:16 mihad
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// Wrong acknowledge generation during receiving repaired
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//
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// Revision 1.1.1.1 2002/02/18 16:16:55 mihad
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// Revision 1.1.1.1 2002/02/18 16:16:55 mihad
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// Initial project import - working
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// Initial project import - working
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//
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//
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//
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//
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char_valid_o = !char_valid_o ;
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char_valid_o = !char_valid_o ;
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end
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end
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end
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end
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endtask // kbd_receive_char
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endtask // kbd_receive_char
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time last_clk_low;
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time last_clk_diference;
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initial
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begin
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last_clk_low =0;
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last_clk_diference =0;
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end
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always @(negedge kbd_clk_io)
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begin:low_time_check
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if (kbd_clk == 1)
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begin
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last_clk_low =$time;
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fork
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begin
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#61000
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$display(" clock low more then 61us");
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$display("Time %t", $time) ;
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#30000
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$display("error clock low more then 90usec");
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$display("Time %t", $time) ;
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$stop;
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end
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begin
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@(posedge kbd_clk_io);
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disable low_time_check;
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end
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join
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end
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end
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always @(posedge kbd_clk_io )
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begin
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if (last_clk_low >0 )
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begin
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last_clk_diference = $time - last_clk_low;
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if (last_clk_diference < 60000)
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begin
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$display("error time< 60u");
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#100 $stop;
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end
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end
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end
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endmodule // ps2_keyboard_model
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endmodule // ps2_keyboard_model
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No newline at end of file
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No newline at end of file
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