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Need Verilog code for pulse counter

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rakko

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anyone has the verilog code for a pulse counter that counts a varying pulse synchronous to another clock?
 

pulse counter

What do you want to count - number of pulses, pulse width, pulse period?
What is that other clock doing?
Maybe draw a timing diagram of what you mean.
 

Re: pulse counter

I want to count the number of pulses. The master clock is running at a fixed 25mhz frequency. The pulses are much slower in the order of khz and do not have even duty cycles. they could be as fast as a few mhz to slow as a few khz.
 

Re: pulse counter

Attached verilog file of pulse counter.

Added after 2 minutes:

Resend in plain text.

module counter(sclk, fclk, rstn, counter);
input sclk, fclk ,rstn;
output counter;

wire syn_sclk
//you can search web to find "pulse synchronizer" logic
// Or I will come up one later.
psync_cell u_pc(.d(sclk), .clk(fclk), .rstn(rstn), .o(syn_sclk));
reg [15] counter;
always @(posedge fclk or negedge rstn)
if(!rstn) counter <= 0;
else if(syn_sclk) counter <= counter + 1;

endmodule

Added after 2 hours 18 minutes:

Check here for pulse synchronizer schematic.
https://www.nandigits.com/p85.htm

Nandy
www.nandigits.com
Netlist Debug/ECO in GUI mode.[/url]
 

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