Simple Socket Server Design Example

This design example shows a socket server using the NicheStack TCP/IP stack-Nios® II Edition on MicroC/OS-II. The server implements simple commands to control board LEDs through a separate MicroC/OS-II task. This design example is not a complete implementation of a telnet server. This example uses the sockets interface.

Table 1 lists the software source files included in this example.

Table 1. Software Source Files Included in Simple Socket Server Design Example

File Description
alt_error_handler.hDefinitions for four error handlers—one each for MicroC-OS/II, the NicheStack TCP/IP stack, and the simple socket server application.
alt_error_handler.cImplementation for four error handlers—one each for MicroC-OS/II, the NicheStack TCP/IP stack, and the simple socket server application.
network_utilities.hDefinitions for routines to read/write the media access controller (MAC) address and Internet protocol (IP) address.
network_utilities.cContains routines to read/write the MAC address and IP address from non-volatile memory.
network_utilities_iniche.cContains MAC address, IP address, and dynamic host configuration protocol (DHCP) routines to manage addressing. These are used by the NicheStack TCP/IP stack during initialization, but are implementation-specific (you can set your MAC address or read it from non-volatile memory).
iniche_init.cContains main() and NicheStack callback to install tasks once the NicheStack TCP/IP stack has been properly initialized.
simple_socket_server.cImplementation of a simple socket server, including all necessary socket calls to handle a single socket connection and process received commands.
led.cContains tasks to manage board LED displays.
simple_socket_server.hDefinitions for the entire example application.

Using This Design Example

This embedded software example is installed with the Nios II Embedded Design Suite (EDS) in a directory under <Nios II kit path>/examples/software. A free evaluation version of the Nios II EDS is available. This example is available as a Nios II integrated development environment (IDE) project template. The template includes the project settings required to run this design on the supported target hardware configuration. To use this software example, it is not necessary to copy the files from the installation directory. Simply create a new C/C++ application project in the IDE, and choose the desired project template.

The use of this design is governed by, and subject to, the terms and conditions of the Intel® Design Example License Agreement.

Hardware Requirements

This example requires the following to be present in the target hardware design:

  • One of the following networking interfaces
    • LAN91C111 MAC/PHY (lan91c111 in SOPC Builder)
    • Triple Speed Ethernet MAC (tse_mac in SOPC Builder)
  • Programmable I/O (PIO), 8-bit output (led_pio in SOPC Builder)
  • PIO, 16-bit output (seven_seg_pio in SOPC Builder)
  • STDOUT device [UART or Joint Test Action Group (JTAG) UART]
  • (Optional) LCD display (lcd_display in SOPC Builder)

You can run this software design example on the Nios II hardware design examples shown in Table 2.


Table 2. Networking Interface Provided by FPGA Device Family and Design Name

Device Family Design Name
Standard-Lan91c111 Standard Full-Featured
Cyclone®   LAN91C111 LAN91C111
Cyclone II LAN91C111 MAC MAC
Stratix®   LAN91C111 LAN91C111
Stratix II LAN91C111 MAC MAC

Related Links

For more information about using this design example in your project, go to:

Design Examples Disclaimer

These design examples may only be used within Intel Corporation devices and remain the property of Intel. They are being provided on an “as-is” basis and as an accommodation; therefore, all warranties, representations, or guarantees of any kind (whether express, implied, or statutory) including, without limitation, warranties of merchantability, non-infringement, or fitness for a particular purpose, are specifically disclaimed. Intel expressly does not recommend, suggest, or require that these examples be used in combination with any other product not provided by Intel.