Community
cancel
Showing results for 
Search instead for 
Did you mean: 
Highlighted
Honored Contributor I
1,652 Views

How to perform logical operation for two signal generated at diiferent clock cycle?

Hi everyone, 

i have to random binary data signal,one starts at 100ns and ends at 1450ns ,another data signal starts from 14350ns and ends at 15000ns. I want perform xor operation of these two data signal in verilog.How to shift the signal or how to make the second data signal to start from 100ns so that both signal have data at the same at same clock cycle?.please help me....i'm new to this verilog code. 

 

thank you.
0 Kudos
6 Replies
Highlighted
Honored Contributor I
16 Views

 

--- Quote Start ---  

Hi everyone, 

i have to random binary data signal,one starts at 100ns and ends at 1450ns ,another data signal starts from 14350ns and ends at 15000ns. I want perform xor operation of these two data signal in verilog.How to shift the signal or how to make the second data signal to start from 100ns so that both signal have data at the same at same clock cycle?.please help me....i'm new to this verilog code. 

 

thank you. 

--- Quote End ---  

 

 

one way is to use two fifos, one dual clk on clk1/clk2, the other single on clk1. once both have data read out and xor. 

 

Or use handshake approach instead of fifo but a shallow fifo is almost same cost as handshake.
0 Kudos
Highlighted
Honored Contributor I
16 Views

can you please provide me the verilog code.. It will be very useful for me. i'm using microsemi Libero Soc 11.4v software to write verilog code.

0 Kudos
Highlighted
Honored Contributor I
16 Views

Thanks for the reply :).... 

 

can you please provide me the verilog code.. It will be very useful for me. i'm using microsemi Libero Soc 11.4v software to write verilog code.
0 Kudos
Highlighted
Honored Contributor I
16 Views

I have a verilog code for memeory.I got the output for presynthesis,but postsynthesis i'm unable to get the simulation rersult 

 

This is my actual code for memory............... 

............................................................ 

 

 

 

 

 

 

`timescale 1ns/100ps 

module main( sysclk, reset,read_out); 

 

 

//<statements> 

 

 

input sysclk; 

input reset; 

output read_out; 

 

 

 

 

reg [7:0] count1_1,count2_1; 

reg [7:0] count12_1,count11_1; 

wire [7:0]count11,count12,count1,count2; 

 

reg count1_en,count2_en,count11_en ,count12_en; 

 

 

 

 

////////////////////////////////////// 

//////////////DATA FOR MEMORY1 

/////////////////////////////// 

// counter1 

 

 

 

 

always @( posedge sysclk) 

begin 

 

if (reset==0)  

begin 

count11_en <= 1;  

count11_1<= {8{1'b0}} ; end 

else 

if(count11_en == 1) 

if(count11!= 8'd222) 

count11_1<= count11_1 + 1; 

if(count11_1== 8'd222) 

begin 

count11_en <= 0; 

count11_1<=8'd0; 

end 

 

 

end 

assign count11=count11_1; 

 

 

always @( posedge sysclk) 

begin 

 

if(count11==0) begin 

count12_en <= 1; 

count12_1 <= {8{1'b0}} ; end 

else 

if(count12_en == 1) 

if(count12_1!= 8'd222) 

 

count12_1 <= count12_1 + 1; 

if(count12_1==222) 

begin 

count12_en <= 0;  

count12_1<=8'd0; 

end 

 

end 

assign count12=count12_1; 

 

 

 

 

 

 

 

 

 

 

 

wire[7:0] read_out1; 

////////////////////////////////////////////////////////////////////// 

// Instantiate Unit Under Test: memory1 

////////////////////////////////////////////////////////////////////// 

memory1 memory1_0( 

.WD(count11), 

.RD(read_out1), 

.WEN(count11_en), 

.REN( count12_en), 

.WADDR(count11), 

.RADDR(count12), 

.WCLK(sysclk), 

.RCLK(sysclk), 

 

.RESET(reset) 

); 

 

 

.................................................................. 

................................................................. 

Warning: (vsim-3017) C:/Users/Krishna/Desktop/monika/HARDWARETEST/RSTEST/synthesis/main.v(9290): [TFMPC] - Too few port connections. Expected 9, found 7. 

#  

# Region: /tb_mem/main_0/memory1_0 

# ** Error: (vsim-3063) C:/Users/Krishna/Desktop/monika/HARDWARETEST/RSTEST/synthesis/main.v(9290): Port 'read_out1' not found in the connected module (1st connection). 

#  

# Region: /tb_mem/main_0/memory1_0 

# ** Error: (vsim-3063) C:/Users/Krishna/Desktop/monika/HARDWARETEST/RSTEST/synthesis/main.v(9290): Port 'count11_1' not found in the connected module (2nd connection). 

#  

# Region: /tb_mem/main_0/memory1_0 

# ** Error: (vsim-3063) C:/Users/Krishna/Desktop/monika/HARDWARETEST/RSTEST/synthesis/main.v(9290): Port 'count12_1' not found in the connected module (3rd connection). 

#  

# Region: /tb_mem/main_0/memory1_0 

# ** Error: (vsim-3063) C:/Users/Krishna/Desktop/monika/HARDWARETEST/RSTEST/synthesis/main.v(9290): Port 'count11_en' not found in the connected module (4th connection). 

#  

# Region: /tb_mem/main_0/memory1_0 

# ** Error: (vsim-3063) C:/Users/Krishna/Desktop/monika/HARDWARETEST/RSTEST/synthesis/main.v(9290): Port 'count12_en' not found in the connected module (5th connection). 

#  

# Region: /tb_mem/main_0/memory1_0 

# ** Error: (vsim-3063) C:/Users/Krishna/Desktop/monika/HARDWARETEST/RSTEST/synthesis/main.v(9290): Port 'sysclk_c' not found in the connected module (6th connection). 

#  

# Region: /tb_mem/main_0/memory1_0 

# ** Error: (vsim-3063) C:/Users/Krishna/Desktop/monika/HARDWARETEST/RSTEST/synthesis/main.v(9290): Port 'reset_c_0' not found in the connected module (7th connection). 

#  

# Region: /tb_mem/main_0/memory1_0 

# ** Warning: (vsim-3722) C:/Users/Krishna/Desktop/monika/HARDWARETEST/RSTEST/synthesis/main.v(9290): [TFMPC] - Missing connection for port 'WD'. 

#  

# ** Warning: (vsim-3722) C:/Users/Krishna/Desktop/monika/HARDWARETEST/RSTEST/synthesis/main.v(9290): [TFMPC] - Missing connection for port 'RD'. 

#  

# ** Warning: (vsim-3722) C:/Users/Krishna/Desktop/monika/HARDWARETEST/RSTEST/synthesis/main.v(9290): [TFMPC] - Missing connection for port 'WEN'. 

#  

# ** Warning: (vsim-3722) C:/Users/Krishna/Desktop/monika/HARDWARETEST/RSTEST/synthesis/main.v(9290): [TFMPC] - Missing connection for port 'REN'. 

#  

# ** Warning: (vsim-3722) C:/Users/Krishna/Desktop/monika/HARDWARETEST/RSTEST/synthesis/main.v(9290): [TFMPC] - Missing connection for port 'WADDR'. 

#  

# ** Warning: (vsim-3722) C:/Users/Krishna/Desktop/monika/HARDWARETEST/RSTEST/synthesis/main.v(9290): [TFMPC] - Missing connection for port 'RADDR'. 

#  

# ** Warning: (vsim-3722) C:/Users/Krishna/Desktop/monika/HARDWARETEST/RSTEST/synthesis/main.v(9290): [TFMPC] - Missing connection for port 'WCLK'. 

#  

# ** Warning: (vsim-3722) C:/Users/Krishna/Desktop/monika/HARDWARETEST/RSTEST/synthesis/main.v(9290): [TFMPC] - Missing connection for port 'RCLK'. 

#  

# ** Warning: (vsim-3722) C:/Users/Krishna/Desktop/monika/HARDWARETEST/RSTEST/synthesis/main.v(9290): [TFMPC] - Missing connection for port 'RESET'. 

#  

# Error loading design 

# Error: Error loading design 

# Pausing macro execution 

# MACRO ./run.do PAUSED at line 16 

.............................................................................. 

................................................................................ 

 

 

 

the above mentioned error i got during postsynthesis simulation i'm not getting how to solve this error please help in this........... 

 

 

 

i'm using libero Soc11.4v software to write and code and modelsim microsemi 10.3c simulator . 

 

 

 

please help to solve this problem
0 Kudos
Highlighted
Honored Contributor I
16 Views

The binary data signal is 1 bit or multiple bits??

0 Kudos
Highlighted
Honored Contributor I
16 Views

This code will give you an idea to implement. 

 

// Design code 

module Slave (clk,a,b,counter); 

input clk; 

input a; 

input b; 

input [31:0] counter; 

 

reg [8:0] Y; 

reg [8:0] storea=0; 

reg [8:0] mem1; 

reg [8:0] storeb=0; 

reg [8:0] mem2; 

 

always @(posedge clk) begin 

storea <= {storea[7:0],a}; 

end 

 

always @(posedge clk) begin 

storeb <= {storeb[7:0],b}; 

end 

 

 

always @(posedge clk) begin 

if(counter == 'd11) 

mem1 <= storea; 

else if(counter == 'd21) 

mem2 <= storeb; 

end 

 

always @(counter) begin 

if(mem1!== 'dx && mem2 !== 'dx) 

Y = mem1 & mem2; 

else 

Y = 'd0; 

end 

 

endmodule 

 

//Testbench code 

module TB; 

 

reg clk=0; 

reg a=0; 

reg b=0; 

int counter = 0; 

Slave D1 (.clk(clk),.a(a),.b(b),.counter(counter)); 

 

always# 1 clk = ~clk; 

 

always @(posedge clk) begin 

counter<= counter+1;  

end 

 

always @(counter) begin 

if(counter >= 2 && counter <= 10) 

a = $random; 

else if(counter >= 15 && counter <= 20) 

b = $random; 

else begin 

a = 0;b = 0; 

end 

end 

 

/*always  

# 100 a = $random; 

# 1450 a = 0; 

end 

 

initial begin 

# 14350 b = $random; 

# 15000 b = 0; 

end */ 

 

 

initial 

# 100 $finish; 

 

 

initial 

begin 

$dumpfile("design.vcd"); 

$dumpvars; 

end 

 

endmodule 

 

Thanks
0 Kudos