How to get the value of a single bit in a memory?

[usman]

Assalam o Alaikum to All!!!
i am confused in a very simple question....plz u people clear/solve it..
if i want the value of a single bit of memory , how can i....
i.e reg [7:0] mem [0:1023];
now i want to access bit no 4 of location no 512 of memory....
and can i apply a loop on it to access memory bit wise...
regards,
Muhammad Usman

 

[echo47]

Re: a simple question

I assume you are talking about Verilog.

To access bit 4 of address 512, use mem[512][4]

Here's a module that initializes the array with random bits, and then uses two counters to read them out:

module top (clk, out);
  input             clk;
  reg         [7:0] mem [0:1023];
  reg         [9:0] addr = 0;
  reg         [2:0] bit = 0;
  output reg        out;

  integer x, y;
  initial begin
    for (y=0; y<1024; y=y+1)
      for (x=0; x<8; x=x+1)
        mem[y][x] = $random;
  end

  always @ (posedge clk) begin
    bit  <= bit + 1;
    addr <= addr + &bit;
    out  <= mem[addr][bit];   // some synthesis tools can't swallow this
  end
endmodule

 

[sqwang93]

Re: a simple question

I assume you use Verilog.

To access bit 4 of address 512:

reg [7:0] tmp_reg;
reg bit_4;

tmp_reg <= mem[512];

bit_4 <= tmp_reg[4];

 

[mona_c]

Re: a simple question

Walaikum Assalaam Usman ji

Hope u got the ans ..if not yet then ..tell us


khush raho
feAmaanAllah

 

[usman]

Re: a simple question

Assalam o Alaikum!! mona Jii!!!
really my problem was solved by echo47 & sqwang>>>thank you very much

Muhammamd Usman