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author | Josh Blum <josh@joshknows.com> | 2010-01-22 16:00:45 -0800 |
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committer | Josh Blum <josh@joshknows.com> | 2010-01-22 16:00:45 -0800 |
commit | 8b377a9d6d0ad281474a8dbff49ea3b093178b28 (patch) | |
tree | 8e3c7a1b60f96df6e2140666d3b7afa5166d885d /control_lib/oneshot_2clk.v | |
parent | e92d36dcfe02afaedec348f2d8fc4523fb4e633b (diff) | |
download | uhd-8b377a9d6d0ad281474a8dbff49ea3b093178b28.tar.gz uhd-8b377a9d6d0ad281474a8dbff49ea3b093178b28.tar.bz2 uhd-8b377a9d6d0ad281474a8dbff49ea3b093178b28.zip |
moved into subdir
Diffstat (limited to 'control_lib/oneshot_2clk.v')
-rw-r--r-- | control_lib/oneshot_2clk.v | 35 |
1 files changed, 0 insertions, 35 deletions
diff --git a/control_lib/oneshot_2clk.v b/control_lib/oneshot_2clk.v deleted file mode 100644 index 72f16a4b3..000000000 --- a/control_lib/oneshot_2clk.v +++ /dev/null @@ -1,35 +0,0 @@ - -// Retime a single bit from one clock domain to another -// Guarantees that no matter what the relative clock rates, if the in signal is high for at least -// one clock cycle in the clk_in domain, then the out signal will be high for at least one -// clock cycle in the clk_out domain. If the in signal goes high again before the process is done -// the behavior is undefined. No other guarantees. Designed for passing reset into a new -// clock domain. - -module oneshot_2clk - (input clk_in, - input in, - input clk_out, - output reg out); - - reg del_in = 0; - reg sendit = 0, gotit = 0; - reg sendit_d = 0, gotit_d = 0; - - always @(posedge clk_in) del_in <= in; - - always @(posedge clk_in) - if(in & ~del_in) // we have a positive edge - sendit <= 1; - else if(gotit) - sendit <= 0; - - always @(posedge clk_out) sendit_d <= sendit; - always @(posedge clk_out) out <= sendit_d; - - always @(posedge clk_in) gotit_d <= out; - always @(posedge clk_in) gotit <= gotit_d; - -endmodule // oneshot_2clk - - |