一步一步学ZedBoard Zynq(四)：基于AXI Lite 总线的从设备IP设计

BEGIN my_axi_ip

## Peripheral Options
OPTION IPTYPE = PERIPHERAL
OPTION IMP_NETLIST = TRUE
OPTION HDL = MIXED
OPTION IP_GROUP = MICROBLAZE:USER
OPTION DESC = MY_AXI_IP
OPTION ARCH_SUPPORT_MAP = (others=DEVELOPMENT)

## Bus Interfaces
BUS_INTERFACE BUS = S_AXI, BUS_STD = AXI, BUS_TYPE = SLAVE

## Generics for VHDL or Parameters for Verilog
PARAMETER C_S_AXI_DATA_WIDTH = 32, DT = INTEGER, BUS = S_AXI, ASSIGNMENT = CONSTANT
PARAMETER C_S_AXI_ADDR_WIDTH = 32, DT = INTEGER, BUS = S_AXI, ASSIGNMENT = CONSTANT
PARAMETER C_S_AXI_MIN_SIZE = 0x000001ff, DT = std_logic_vector, BUS = S_AXI
PARAMETER C_USE_WSTRB = 0, DT = INTEGER
PARAMETER C_DPHASE_TIMEOUT = 8, DT = INTEGER
PARAMETER C_BASEADDR = 0xffffffff, DT = std_logic_vector, MIN_SIZE = 0x100, PAIR = C_HIGHADDR, ADDRESS = BASE, BUS = S_AXI
PARAMETER C_HIGHADDR = 0x00000000, DT = std_logic_vector, PAIR = C_BASEADDR, ADDRESS = HIGH, BUS = S_AXI
PARAMETER C_FAMILY = virtex6, DT = STRING
PARAMETER C_NUM_REG = 1, DT = INTEGER
PARAMETER C_NUM_MEM = 1, DT = INTEGER
PARAMETER C_SLV_AWIDTH = 32, DT = INTEGER
PARAMETER C_SLV_DWIDTH = 32, DT = INTEGER
PARAMETER C_S_AXI_PROTOCOL = AXI4LITE, TYPE = NON_HDL, ASSIGNMENT = CONSTANT, DT = STRING, BUS = S_AXI

## Ports
PORT LED = "", DIR = O, VEC = [7:0]
PORT S_AXI_ACLK = "", DIR = I, SIGIS = CLK, BUS = S_AXI
PORT S_AXI_ARESETN = ARESETN, DIR = I, SIGIS = RST, BUS = S_AXI
PORT S_AXI_AWADDR = AWADDR, DIR = I, VEC = [(C_S_AXI_ADDR_WIDTH-1):0], ENDIAN = LITTLE, BUS = S_AXI
PORT S_AXI_AWVALID = AWVALID, DIR = I, BUS = S_AXI
PORT S_AXI_WDATA = WDATA, DIR = I, VEC = [(C_S_AXI_DATA_WIDTH-1):0], ENDIAN = LITTLE, BUS = S_AXI
PORT S_AXI_WSTRB = WSTRB, DIR = I, VEC = [((C_S_AXI_DATA_WIDTH/8)-1):0], ENDIAN = LITTLE, BUS = S_AXI
PORT S_AXI_WVALID = WVALID, DIR = I, BUS = S_AXI
PORT S_AXI_BREADY = BREADY, DIR = I, BUS = S_AXI
PORT S_AXI_ARADDR = ARADDR, DIR = I, VEC = [(C_S_AXI_ADDR_WIDTH-1):0], ENDIAN = LITTLE, BUS = S_AXI
PORT S_AXI_ARVALID = ARVALID, DIR = I, BUS = S_AXI
PORT S_AXI_RREADY = RREADY, DIR = I, BUS = S_AXI
PORT S_AXI_ARREADY = ARREADY, DIR = O, BUS = S_AXI
PORT S_AXI_RDATA = RDATA, DIR = O, VEC = [(C_S_AXI_DATA_WIDTH-1):0], ENDIAN = LITTLE, BUS = S_AXI
PORT S_AXI_RRESP = RRESP, DIR = O, VEC = [1:0], BUS = S_AXI
PORT S_AXI_RVALID = RVALID, DIR = O, BUS = S_AXI
PORT S_AXI_WREADY = WREADY, DIR = O, BUS = S_AXI
PORT S_AXI_BRESP = BRESP, DIR = O, VEC = [1:0], BUS = S_AXI
PORT S_AXI_BVALID = BVALID, DIR = O, BUS = S_AXI
PORT S_AXI_AWREADY = AWREADY, DIR = O, BUS = S_AXI

END

其中，第39行
PORT LED = "", DIR = O, VEC = [7:0]

是我们添加上的，表明我们为其添加了一个名为LED的端口，方向是输出，长度是8位。其他行代码为默认，不需要修改。

修改用户逻辑，在

Lab4\pcores\my_axi_ip_v1_00_a\hdl\verilog\user_logic.v
//----------------------------------------------------------------------------
// user_logic.v - module
//----------------------------------------------------------------------------
//
// ***************************************************************************
// ** Copyright (c) 1995-2012 Xilinx, Inc. All rights reserved. **
// ** **
// ** Xilinx, Inc. **
// ** XILINX IS PROVIDING THIS DESIGN, CODE, OR INFORMATION "AS IS" **
// ** AS A COURTESY TO YOU, SOLELY FOR USE IN DEVELOPING PROGRAMS AND **
// ** SOLUTIONS FOR XILINX DEVICES. BY PROVIDING THIS DESIGN, CODE, **
// ** OR INFORMATION AS ONE POSSIBLE IMPLEMENTATION OF THIS FEATURE, **
// ** APPLICATION OR STANDARD, XILINX IS MAKING NO REPRESENTATION **
// ** THAT THIS IMPLEMENTATION IS FREE FROM ANY CLAIMS OF INFRINGEMENT, **
// ** AND YOU ARE RESPONSIBLE FOR OBTAINING ANY RIGHTS YOU MAY REQUIRE **
// ** FOR YOUR IMPLEMENTATION. XILINX EXPRESSLY DISCLAIMS ANY **
// ** WARRANTY WHATSOEVER WITH RESPECT TO THE ADEQUACY OF THE **
// ** IMPLEMENTATION, INCLUDING BUT NOT LIMITED TO ANY WARRANTIES OR **
// ** REPRESENTATIONS THAT THIS IMPLEMENTATION IS FREE FROM CLAIMS OF **
// ** INFRINGEMENT, IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS **
// ** FOR A PARTICULAR PURPOSE. **
// ** **
// ***************************************************************************
//
//----------------------------------------------------------------------------
// Filename: user_logic.v
// Version: 1.00.a
// Description: User logic module.
// Date: Tue Oct 09 18:28:06 2012 (by Create and Import Peripheral Wizard)
// Verilog Standard: Verilog-2001
//----------------------------------------------------------------------------
// Naming Conventions:
// active low signals: "*_n"
// clock signals: "clk", "clk_div#", "clk_#x"
// reset signals: "rst", "rst_n"
// generics: "C_*"
// user defined types: "*_TYPE"
// state machine next state: "*_ns"
// state machine current state: "*_cs"
// combinatorial signals: "*_com"
// pipelined or register delay signals: "*_d#"
// counter signals: "*cnt*"
// clock enable signals: "*_ce"
// internal version of output port: "*_i"
// device pins: "*_pin"
// ports: "- Names begin with Uppercase"
// processes: "*_PROCESS"
// component instantiations: "I_<#|FUNC>"
//----------------------------------------------------------------------------