M24LC04B的verilog代码
时间: 2023-07-02 14:13:41 浏览: 101
下面是M24LC04B的部分Verilog代码,用于实现串行通信和存储器读写操作:
```
module M24LC04B(
input wire clk, // 时钟信号
input wire rst, // 复位信号
input wire sda, // 数据信号
input wire scl, // 时钟信号
input wire addr, // 地址信号
input wire write_en, // 写使能信号
output reg data_out // 数据输出信号
);
// 定义状态机状态
typedef enum {
IDLE,
START_BIT,
ADDR_BYTE,
READ_DATA,
WRITE_DATA,
STOP_BIT
} state_t;
// 定义状态机变量
reg [2:0] state;
reg [2:0] bit_count;
reg [7:0] addr_reg;
reg [7:0] data_reg;
// 初始状态为IDLE
initial begin
state = IDLE;
end
// 状态机逻辑
always @(posedge clk or posedge rst) begin
if (rst) begin
state <= IDLE;
bit_count <= 0;
addr_reg <= 0;
data_reg <= 0;
end else begin
case (state)
IDLE: begin
if (!scl && sda) begin
state <= START_BIT;
bit_count <= 0;
end
end
START_BIT: begin
if (bit_count == 0) begin
if (!sda) begin
state <= ADDR_BYTE;
bit_count <= 0;
end
end else begin
bit_count <= bit_count + 1;
end
end
ADDR_BYTE: begin
if (bit_count == 7) begin
addr_reg <= sda;
state <= READ_DATA;
bit_count <= 0;
end else begin
addr_reg <= {addr_reg[6:0], sda};
bit_count <= bit_count + 1;
end
end
READ_DATA: begin
if (bit_count == 7) begin
data_out <= data_reg;
state <= STOP_BIT;
bit_count <= 0;
end else begin
data_reg <= {data_reg[6:0], sda};
bit_count <= bit_count + 1;
end
end
WRITE_DATA: begin
if (bit_count == 7) begin
state <= STOP_BIT;
bit_count <= 0;
end else begin
data_reg <= {data_reg[6:0], sda};
bit_count <= bit_count + 1;
end
end
STOP_BIT: begin
if (scl && sda) begin
if (write_en) begin
state <= WRITE_DATA;
end else begin
state <= IDLE;
end
bit_count <= 0;
end
end
endcase
end
end
endmodule
```
请注意,这只是一个简单的实现示例,实际应用中可能需要更复杂的逻辑。此外,该代码并不包括存储器阵列本身的实现。