Binary To — Bcd Verilog Code

bcd = temp; end endmodule For a truly scalable version, use a generate loop or a for loop that iterates over BCD digits:

Here’s a comprehensive write-up on , suitable for a technical blog, documentation, or academic submission. Binary to BCD Conversion in Verilog 1. Introduction In digital systems, binary numbers are the native representation, but many human‑interface devices (like 7‑segment displays, LCDs, or real‑time clocks) require Binary Coded Decimal (BCD) format. BCD represents each decimal digit of a number by a separate 4‑bit binary code.

initial begin $monitor("Binary = %d (%b) → BCD = %b (%d %d %d)", binary, binary, bcd, bcd[11:8], bcd[7:4], bcd[3:0]); binary = 8'd0; #10; binary = 8'd5; #10; binary = 8'd42; #10; binary = 8'd99; #10; binary = 8'd170; #10; binary = 8'd255; #10; $finish; end endmodule Binary To Bcd Verilog Code

module binary_to_bcd #( parameter BINARY_WIDTH = 8, // e.g., 8-bit binary input parameter BCD_DIGITS = 3 // 8-bit binary max = 255 → 3 BCD digits )( input wire [BINARY_WIDTH-1:0] binary, output reg [4*BCD_DIGITS-1:0] bcd ); integer i; reg [4*BCD_DIGITS-1:0] temp; reg [BINARY_WIDTH-1:0] bin;

for (i = 0; i < BINARY_WIDTH; i = i + 1) begin // Shift left by 1: bring next binary bit into LSB of temp temp = temp[4*BCD_DIGITS-2:0], bin[BINARY_WIDTH-1]; bin = bin[BINARY_WIDTH-2:0], 1'b0; bcd = temp; end endmodule For a truly

: BCD uses only 0–9; combinations 1010–1111 are invalid. 3. The Double‑Dabble Algorithm The Double‑Dabble (or shift‑and‑add‑3) algorithm converts binary to BCD without division or multiplication, making it ideal for hardware implementation.

bin2bcd #(.BIN_WIDTH(8), .BCD_DIGITS(3)) uut ( .bin(binary), .bcd(bcd) ); BCD represents each decimal digit of a number

always @(*) begin bcd_reg = 0; bin_reg = bin;