verilog 32位crc计算
时间: 2023-08-08 21:07:54 浏览: 119
以下是一个简单的 Verilog 代码,用于计算 32 位 CRC:
```
module crc32 (
input [31:0] data_in,
input clk,
input reset,
output reg [31:0] crc_out
);
reg [31:0] crc;
always @(posedge clk) begin
if (reset) begin
crc <= 32'hFFFFFFFF;
end else begin
crc <= crc ^ data_in; // XOR the data with the CRC
for (int i = 0; i < 32; i++) begin
if (crc[31]) begin
crc <= {crc[30:0], 1'b0} ^ 32'h04C11DB7; // CRC-32 polynomial
end else begin
crc <= {crc[30:0], 1'b0};
end
end
end
end
assign crc_out = ~crc; // Invert CRC before output
endmodule
```
该代码使用 CRC-32 标准多项式 0x04C11DB7 进行计算。输入数据 `data_in` 是 32 位,时钟信号 `clk` 用于同步计算,重置信号 `reset` 用于清除 CRC 寄存器,输出信号 `crc_out` 是计算后的 32 位 CRC 值。
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