写一个iic的verilog驱动文件

我可以为你提供一个参考，但是最终的实现方式取决于你的需求。以下是一个基本的I2C Verilog驱动程序示例：// I2C Module
module i2c_module(
input clk,
input rst_n,
input [7:0] scl,
output [7:0] sda
);
// Variables
reg [7:0] scl_pre;
reg [7:0] sda_pre;
reg [1:0] i2c_state;
reg [7:0] i2c_data;
reg [7:0] i2c_cnt;
reg [7:0] i2c_addr;
reg [7:0] i2c_data_cnt;
reg i2c_ack;
reg i2c_read;
reg [7:0] i2c_data_out;
wire i2c_start;
wire i2c_stop;
wire i2c_rd_done;
wire i2c_wr_done;

// Sequencer
always @(posedge clk or negedge rst_n) begin
if (!rst_n) begin
scl_pre <= 8'h00;
sda_pre <= 8'h00;
i2c_state <= 2'h00;
i2c_data <= 8'h00;
i2c_cnt <= 8'h00;
i2c_addr <= 8'h00;
i2c_data_cnt <= 8'h00;
i2c_ack <= 1'b0;
i2c_read <= 1'b0;
i2c_data_out <= 8'h00;
end else begin
scl_pre <= scl;
sda_pre <= sda;
case (i2c_state)
2'h00: begin
if (i2c_start) i2c_state <= 2'h01;
end
2'h01: begin
if (scl_pre && scl) i2c_state <= 2'h02;
end
2'h02: begin
if (scl_pre && !scl) i2c_state <= 2'h03;
end
// ...
endcase
end
end

// Output
assign sda = (
i2c_state == 2'h00 ? sda_pre :
i2c_state == 2'h03 ? i2c_data[7] :
i2c_state == 2'h05 ? i2c_ack :
8'h00
);

// ....endmodule