verilog iic 代码

可以回答。以下是一个简单的 Verilog IIC 代码示例：

module iic_master (
input clk,
input rst,
input sda_i,
output sda_o,
output scl_o
);

reg [7:0] addr;
reg [7:0] data;
reg [2:0] state;

assign sda_o = state[1] ? data[0] : 1'b1;
assign scl_o = state[0];

always @(posedge clk) begin
if (rst) begin
state <= 3'b000;
addr <= 8'b0;
data <= 8'b0;
end else begin
case (state)
3'b000: begin // Start condition
sda_o <= 1'b0;
scl_o <= 1'b0;
state <= 3'b001;
end
3'b001: begin // Send address
sda_o <= addr[7];
addr <= {addr[6:0], 1'b0};
state <= 3'b010;
end
3'b010: begin // Acknowledge
if (sda_i == 1'b0) begin
state <= 3'b011;
end
end
3'b011: begin // Send data
sda_o <= data[7];
data <= {data[6:0], 1'b0};
state <= 3'b100;
end
3'b100: begin // Acknowledge
if (sda_i == 1'b0) begin
state <= 3'b101;
end
end
3'b101: begin // Stop condition
sda_o <= 1'b0;
scl_o <= 1'b1;
state <= 3'b000;
end
endcase
end
end

endmodule