axi slave verilog 代码
时间: 2023-05-02 20:06:08 浏览: 243
Axi slave verilog 代码是基于 AXI 协议的从设备的 Verilog 代码实现。AXI 协议是一种高性能、高带宽的总线协议,主要用于连接片上系统内部各个组件之间的数据传输。在实现 AXI slave 的 Verilog 代码时,需要按照 AXI 协议的要求对代码进行设计和编写。
AXI slave verilog 代码通常包含以下几个模块:数据接收模块、数据传输模块、控制信号生成模块、状态机控制模块等。
其中,数据接收模块用于接收来自 AXI master 的数据传输请求,包括读/写请求、地址信息以及传输数据等。数据传输模块用于将数据从 AXI slave 内部传输到 AXI master 外部,或将数据从 AXI master 写入到 AXI slave 内部。控制信号生成模块用于生成必要的控制信号,以控制数据传输的进行。状态机控制模块则用于控制整个 AXI 从设备的状态机的运行。
在设计 AXI slave verilog 代码时,需要注意的是,需要根据具体的需求来确定各个模块的功能和实现方法,同时还需要考虑到性能和可靠性等因素,以保障系统的稳定性和可靠性。
相关问题
verilog AXI slave with outstanding
An AXI slave with outstanding transactions can be implemented in Verilog by using a state machine to manage the response to incoming transactions. The state machine can keep track of the number of outstanding transactions and respond accordingly. Here is an example implementation:
```
module axi_slave_outstanding(
input aclk,
input aresetn,
input awvalid,
input [31:0] awaddr,
input [2:0] awprot,
input awcache,
input awburst,
input [3:0] awlen,
input arvalid,
input [31:0] araddr,
input [2:0] arprot,
input arcache,
input arburst,
input [3:0] arlen,
input wvalid,
input [31:0] wdata,
input [3:0] wstrb,
input wlast,
output bvalid,
output rvalid,
output [1:0] rresp,
output [31:0] rdata,
output rlast
);
reg [1:0] state;
reg [31:0] mem[0:1023];
reg [3:0] arcount;
reg [3:0] awcount;
// Reset state machine and counters on reset
always @(posedge aclk) begin
if (!aresetn) begin
state <= 2'b00;
arcount <= 4'b0000;
awcount <= 4'b0000;
end
end
// State machine
always @(posedge aclk) begin
case (state)
// Idle state
2'b00: begin
if (awvalid) begin
state <= 2'b01;
awcount <= awlen;
end else if (arvalid) begin
state <= 2'b10;
arcount <= arlen;
end
end
// Write data state
2'b01: begin
if (wvalid) begin
mem[awaddr] <= wdata;
awaddr <= awaddr + 1;
awcount <= awcount - 1;
if (wlast) begin
bvalid <= 1'b1;
state <= 2'b00;
end
end
end
// Read data state
2'b10: begin
if (rcount == 4'b0000) begin
rvalid <= 1'b1;
rdata <= mem[araddr];
end
araddr <= araddr + 1;
arcount <= arcount - 1;
if (arcount == 4'b0000) begin
rlast <= 1'b1;
rvalid <= 1'b0;
state <= 2'b00;
end
end
// Error state
default: begin
state <= 2'b00;
end
endcase
end
endmodule
```
In this implementation, the state machine has three states: idle, write data, and read data. When an AXI write transaction is received, the state machine transitions to the write data state and writes the incoming data to memory. It also keeps track of the number of outstanding write transactions using the `awcount` counter. When an AXI read transaction is received, the state machine transitions to the read data state and reads the requested data from memory. It also keeps track of the number of outstanding read transactions using the `arcount` counter.
The `bvalid`, `rvalid`, `rdata`, and `rlast` outputs are used to signal the completion of the AXI transactions to the master. The `bvalid` output is set to 1 when a write response is ready, and the `rvalid` output is set to 1 when a read response is ready. The `rdata` output contains the read data, and the `rlast` output signals the end of a read transaction.
This implementation assumes a single master and a single slave, and does not support burst transactions or interleaved transactions. It also does not support any AXI extensions beyond the basic read and write transactions.
Verilog代码实现AXI master
module axi_master (
input wire clk, // 时钟信号
input wire rst, // 复位信号
output wire [31:0] address, // 写入/读取的地址
output wire [31:0] write_data, // 写入数据
input wire write_valid, // 写入数据有效信号
output wire write_ready, // 写入数据准备好信号
input wire read_valid, // 读取数据有效信号
output wire read_ready, // 读取数据准备好信号
input wire [31:0] read_data // 读取到的数据
);
// AXI总线接口
wire [31:0] axi_awaddr; // 写入/读取地址信号
wire axi_awvalid; // 写入/读取地址有效信号
wire axi_awready; // 写入/读取地址准备好信号
wire [31:0] axi_wdata; // 写入数据信号
wire axi_wvalid; // 写入数据有效信号
wire axi_wready; // 写入数据准备好信号
wire [1:0] axi_wstrb; // 写入数据使能信号
wire axi_bvalid; // 写入响应有效信号
wire axi_bready; // 写入响应准备好信号
wire [31:0] axi_araddr; // 读取地址信号
wire axi_arvalid; // 读取地址有效信号
wire axi_arready; // 读取地址准备好信号
wire axi_rvalid; // 读取数据有效信号
wire axi_rready; // 读取数据准备好信号
wire [31:0] axi_rdata; // 读取到的数据信号
// AXI总线从机接口
axi_lite_slave #(
.C_S_AXI_ADDR_WIDTH(32),
.C_S_AXI_DATA_WIDTH(32)
) inst_lite_slave (
.ACLK(clk),
.ARESETn(rst),
.S_AXI_AWADDR(axi_awaddr),
.S_AXI_AWVALID(axi_awvalid),
.S_AXI_AWREADY(axi_awready),
.S_AXI_WDATA(axi_wdata),
.S_AXI_WVALID(axi_wvalid),
.S_AXI_WREADY(axi_wready),
.S_AXI_WSTRB(axi_wstrb),
.S_AXI_BVALID(axi_bvalid),
.S_AXI_BREADY(axi_bready),
.S_AXI_ARADDR(axi_araddr),
.S_AXI_ARVALID(axi_arvalid),
.S_AXI_ARREADY(axi_arready),
.S_AXI_RDATA(axi_rdata),
.S_AXI_RVALID(axi_rvalid),
.S_AXI_RREADY(axi_rready)
);
// 写入地址和数据
assign address = axi_awaddr;
assign write_data = axi_wdata;
// 写入信号
assign axi_awvalid = write_valid;
assign write_ready = axi_awready;
assign axi_wvalid = write_valid;
assign axi_wready = axi_awready;
assign axi_wstrb = 4'hF;
// 读取信号
assign axi_arvalid = read_valid;
assign read_ready = axi_arready;
assign axi_rvalid = read_valid;
assign axi_rready = axi_arready;
assign read_data = axi_rdata;
endmodule