写一个xilinx AIX QUAD SPI IP核的测试代码

以下是一个简单的Xilinx AIX QUAD SPI IP核测试代码，可以用于读取和写入SPI Flash：

module spi_flash_test(
  input wire clk,
  input wire reset,
  output wire [7:0] spi_data_out,
  input wire [7:0] spi_data_in,
  output wire spi_cs,
  output wire spi_sclk,
  output wire spi_mosi,
  input wire spi_miso
);

// SPI Flash Commands
parameter CMD_WRITE_ENABLE = 8'h06;
parameter CMD_WRITE_DISABLE = 8'h04;
parameter CMD_READ_STATUS = 8'h05;
parameter CMD_WRITE_STATUS = 8'h01;
parameter CMD_READ_DATA = 8'h03;
parameter CMD_PAGE_PROGRAM = 8'h02;
parameter CMD_SECTOR_ERASE = 8'h20;
parameter CMD_BLOCK_ERASE = 8'hD8;
parameter CMD_CHIP_ERASE = 8'hC7;
parameter CMD_READ_ID = 8'h9F;

// SPI Flash Status Register Bits
parameter STATUS_BUSY = 1;
parameter STATUS_WEL = 2;

// SPI Flash Address Width
parameter ADDR_WIDTH = 24;

reg [ADDR_WIDTH-1:0] addr = 0;

wire [7:0] spi_data_out_reg;
reg [7:0] spi_data_in_reg;
wire spi_cs_reg;
wire spi_sclk_reg;
wire spi_mosi_reg;
wire spi_miso_reg;

assign spi_data_out = spi_data_out_reg;
assign spi_miso = spi_miso_reg;
assign spi_cs = spi_cs_reg;
assign spi_sclk = spi_sclk_reg;
assign spi_mosi = spi_mosi_reg;

// Instantiate the AIX QUAD SPI IP core
aix_quad_spi_inst aix_quad_spi(
  .clk(clk),
  .reset(reset),
  .spi_data_out(spi_data_out_reg),
  .spi_data_in(spi_data_in_reg),
  .spi_cs(spi_cs_reg),
  .spi_sclk(spi_sclk_reg),
  .spi_mosi(spi_mosi_reg),
  .spi_miso(spi_miso_reg)
);

// Write Enable Function
function void spi_write_enable();
begin
  spi_cs = 1'b0;
  spi_data_in = CMD_WRITE_ENABLE;
  spi_sclk = 1'b0;
  spi_sclk = 1'b1;
  spi_cs = 1'b1;
end
endfunction

// Write Disable Function
function void spi_write_disable();
begin
  spi_cs = 1'b0;
  spi_data_in = CMD_WRITE_DISABLE;
  spi_sclk = 1'b0;
  spi_sclk = 1'b1;
  spi_cs = 1'b1;
end
endfunction

// Read Status Function
function int spi_read_status();
begin
  spi_cs = 1'b0;
  spi_data_in = CMD_READ_STATUS;
  spi_sclk = 1'b0;
  spi_sclk = 1'b1;
  spi_data_in = 8'h00; // dummy byte
  spi_sclk = 1'b0;
  spi_sclk = 1'b1;
  int status = spi_data_out;
  spi_cs = 1'b1;
  return status;
end
endfunction

// Wait for SPI Flash to become ready
function void spi_wait_ready();
begin
  while (spi_read_status()[STATUS_BUSY]) begin
    #1;
  end
end
endfunction

// Write Status Function
function void spi_write_status(int status);
begin
  spi_cs = 1'b0;
  spi_data_in = CMD_WRITE_STATUS;
  spi_sclk = 1'b0;
  spi_sclk = 1'b1;
  spi_data_in = status;
  spi_sclk = 1'b0;
  spi_sclk = 1'b1;
  spi_cs = 1'b1;
end
endfunction

// Read Data Function
function void spi_read_data(output reg [7:0] data);
begin
  spi_cs = 1'b0;
  spi_data_in = CMD_READ_DATA;
  spi_sclk = 1'b0;
  spi_sclk = 1'b1;
  spi_data_in = addr[23:16];
  spi_sclk = 1'b0;
  spi_sclk = 1'b1;
  spi_data_in = addr[15:8];
  spi_sclk = 1'b0;
  spi_sclk = 1'b1;
  spi_data_in = addr[7:0];
  spi_sclk = 1'b0;
  spi_sclk = 1'b1;
  spi_data_in = 8'h00; // dummy byte
  spi_sclk = 1'b0;
  spi_sclk = 1'b1;
  data = spi_data_out;
  spi_cs = 1'b1;
end
endfunction

// Page Program Function
function void spi_page_program(input [7:0] data);
begin
  spi_cs = 1'b0;
  spi_data_in = CMD_PAGE_PROGRAM;
  spi_sclk = 1'b0;
  spi_sclk = 1'b1;
  spi_data_in = addr[23:16];
  spi_sclk = 1'b0;
  spi_sclk = 1'b1;
  spi_data_in = addr[15:8];
  spi_sclk = 1'b0;
  spi_sclk = 1'b1;
  spi_data_in = addr[7:0];
  spi_sclk = 1'b0;
  spi_sclk = 1'b1;
  spi_data_in = data;
  spi_sclk = 1'b0;
  spi_sclk = 1'b1;
  spi_cs = 1'b1;
end
endfunction

// Sector Erase Function
function void spi_sector_erase();
begin
  spi_cs = 1'b0;
  spi_data_in = CMD_SECTOR_ERASE;
  spi_sclk = 1'b0;
  spi_sclk = 1'b1;
  spi_data_in = addr[23:16];
  spi_sclk = 1'b0;
  spi_sclk = 1'b1;
  spi_data_in = addr[15:8];
  spi_sclk = 1'b0;
  spi_sclk = 1'b1;
  spi_data_in = addr[7:0];
  spi_sclk = 1'b0;
  spi_sclk = 1'b1;
  spi_cs = 1'b1;
end
endfunction

// Block Erase Function
function void spi_block_erase();
begin
  spi_cs = 1'b0;
  spi_data_in = CMD_BLOCK_ERASE;
  spi_sclk = 1'b0;
  spi_sclk = 1'b1;
  spi_data_in = addr[23:16];
  spi_sclk = 1'b0;
  spi_sclk = 1'b1;
  spi_data_in = addr[15:8];
  spi_sclk = 1'b0;
  spi_sclk = 1'b1;
  spi_data_in = addr[7:0];
  spi_sclk = 1'b0;
  spi_sclk = 1'b1;
  spi_cs = 1'b1;
end
endfunction

// Chip Erase Function
function void spi_chip_erase();
begin
  spi_cs = 1'b0;
  spi_data_in = CMD_CHIP_ERASE;
  spi_sclk = 1'b0;
  spi_sclk = 1'b1;
  spi_cs = 1'b1;
end
endfunction

// Read ID Function
function void spi_read_id(output reg [15:0] id);
begin
  spi_cs = 1'b0;
  spi_data_in = CMD_READ_ID;
  spi_sclk = 1'b0;
  spi_sclk = 1'b1;
  spi_data_in = 8'h00; // dummy byte
  spi_sclk = 1'b0;
  spi_sclk = 1'b1;
  spi_data_in = 8'h00; // dummy byte
  spi_sclk = 1'b0;
  spi_sclk = 1'b1;
  id = {spi_data_out, spi_data_out};
  spi_cs = 1'b1;
end
endfunction

// Test Write Enable/Disable, Status Read/Write, Data Read/Write, Erase, and ID Read
initial begin
  spi_write_enable();
  assert (spi_read_status()[STATUS_WEL] == 1'b1) else $error("Write Enable Failed");
  spi_write_disable();
  assert (spi_read_status()[STATUS_WEL] == 1'b0) else $error("Write Disable Failed");
  spi_wait_ready();
  reg [7:0] data_in = 8'hAA;
  spi_page_program(data_in);
  spi_wait_ready();
  reg [7:0] data_out;
  spi_read_data(data_out);
  assert (data_out == data_in) else $error("Data Write/Read Failed");
  spi_sector_erase();
  spi_wait_ready();
  spi_block_erase();
  spi_wait_ready();
  spi_chip_erase();
  spi_wait_ready();
  reg [15:0] id;
  spi_read_id(id);
  assert (id == 16'hEF40) else $error("ID Read Failed");
end

endmodule

请注意，这只是一个简单的测试代码，仅用于说明如何使用Xilinx AIX QUAD SPI IP核进行SPI Flash读写。实际应用中，您需要根据具体的应用场景编写更完整和复杂的代码。