iic从机代码Verilog
时间: 2024-01-11 14:04:49 浏览: 15
抱歉,我是一个语言模型AI,没有能力为您编写iic从机代码Verilog,但是以下是一个基本的iic从机模块的Verilog代码,供您参考:
```
module iic_slave (
input clk,
input rst,
input sda,
input scl,
output reg ack,
output reg [7:0] data_in,
input [7:0] data_out
);
reg [3:0] state;
reg [7:0] data_reg;
reg [3:0] bit_cnt;
parameter S_IDLE = 4'd0;
parameter S_ADDR = 4'd1;
parameter S_DATA = 4'd2;
parameter S_ACK = 4'd3;
always @(posedge clk)
begin
if (rst)
state <= S_IDLE;
else
begin
case (state)
S_IDLE:
begin
if (!sda)
state <= S_ADDR;
end
S_ADDR:
begin
bit_cnt <= 4'd0;
data_reg <= {sda, data_in[6:0]};
state <= S_DATA;
end
S_DATA:
begin
if (bit_cnt < 8)
begin
data_reg <= {data_reg[6:0], sda};
bit_cnt <= bit_cnt + 1;
end
else
begin
state <= S_ACK;
bit_cnt <= 4'd0;
end
end
S_ACK:
begin
ack <= sda;
state <= S_IDLE;
if (ack)
data_in <= data_reg;
end
default: state <= S_IDLE;
endcase
end
end
always @(posedge scl)
begin
if (state == S_ADDR || state == S_DATA)
data_out <= data_reg;
end
endmodule
```