URL
https://opencores.org/ocsvn/ps2/ps2/trunk
[/] [ps2/] [tags/] [rel_8/] [bench/] [verilog/] [ps2_keyboard_model.v] - Diff between revs 10 and 24
Go to most recent revision |
Show entire file |
Details |
Blame |
View Log
Rev 10 |
Rev 24 |
Line 41... |
Line 41... |
//////////////////////////////////////////////////////////////////////
|
//////////////////////////////////////////////////////////////////////
|
//
|
//
|
// CVS Revision History
|
// CVS Revision History
|
//
|
//
|
// $Log: not supported by cvs2svn $
|
// $Log: not supported by cvs2svn $
|
|
// Revision 1.2 2002/04/09 13:15:16 mihad
|
|
// Wrong acknowledge generation during receiving repaired
|
|
//
|
// Revision 1.1.1.1 2002/02/18 16:16:55 mihad
|
// Revision 1.1.1.1 2002/02/18 16:16:55 mihad
|
// Initial project import - working
|
// Initial project import - working
|
//
|
//
|
//
|
//
|
|
|
Line 230... |
Line 233... |
char_valid_o = !char_valid_o ;
|
char_valid_o = !char_valid_o ;
|
end
|
end
|
end
|
end
|
endtask // kbd_receive_char
|
endtask // kbd_receive_char
|
|
|
|
|
|
time last_clk_low;
|
|
time last_clk_diference;
|
|
|
|
|
|
|
|
initial
|
|
begin
|
|
last_clk_low =0;
|
|
last_clk_diference =0;
|
|
|
|
end
|
|
|
|
always @(negedge kbd_clk_io)
|
|
|
|
begin:low_time_check
|
|
if (kbd_clk == 1)
|
|
begin
|
|
last_clk_low =$time;
|
|
fork
|
|
begin
|
|
#61000
|
|
$display(" clock low more then 61us");
|
|
$display("Time %t", $time) ;
|
|
#30000
|
|
$display("error clock low more then 90usec");
|
|
$display("Time %t", $time) ;
|
|
$stop;
|
|
end
|
|
begin
|
|
@(posedge kbd_clk_io);
|
|
disable low_time_check;
|
|
end
|
|
join
|
|
end
|
|
end
|
|
|
|
|
|
|
|
|
|
always @(posedge kbd_clk_io )
|
|
begin
|
|
if (last_clk_low >0 )
|
|
begin
|
|
last_clk_diference = $time - last_clk_low;
|
|
if (last_clk_diference < 60000)
|
|
begin
|
|
$display("error time< 60u");
|
|
#100 $stop;
|
|
end
|
|
end
|
|
end
|
|
|
|
|
|
|
|
|
|
|
|
|
endmodule // ps2_keyboard_model
|
endmodule // ps2_keyboard_model
|
|
|
No newline at end of file
|
No newline at end of file
|
© copyright 1999-2024
OpenCores.org, equivalent to Oliscience, all rights reserved. OpenCores®, registered trademark.