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.h |
Definitions for four error handlers—one each for MicroC-OS/II, the NicheStack TCP/IP stack, and the simple socket server application. |
| alt_error_handler.c |
Implementation for four error handlers—one each for MicroC-OS/II, the NicheStack TCP/IP stack, and the simple socket server application. |
| network_utilities.h |
Definitions for routines to read/write the media access controller (MAC) address and Internet protocol (IP) address. |
| network_utilities.c |
Contains routines to read/write the MAC address and IP address from non-volatile memory. |
| network_utilities_iniche.c |
Contains 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.c |
Contains main() and NicheStack callback to install tasks once the NicheStack TCP/IP stack has been properly initialized. |
| simple_socket_server.c |
Implementation of a simple socket server, including all necessary socket calls to handle a single socket connection and process received commands. |
| led.c |
Contains tasks to manage board LED displays. |
| simple_socket_server.h |
Definitions 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.
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)
- Altera® 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 |
Altera MAC |
Altera MAC |
| Stratix® |
|
LAN91C111 |
LAN91C111 |
| Stratix II |
LAN91C111 |
Altera MAC |
Altera MAC |
Related Links
For more information about using this design example in your project, go to:
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