Using the NicheStack TCP/IP Stack - Nios II Edition Tutorial

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ID 683574
Date 10/04/2021
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Document Table of Contents
Document Table of Contents x
1. Using the NicheStack TCP/IP Stack - Nios II Edition Tutorial
1. Using the NicheStack TCP/IP Stack - Nios II Edition Tutorial x
1.1. Introduction 1.2. Nichestack Support and Licensing 1.3. Hardware and Software Requirements 1.4. Tutorial Files 1.5. Software Development Flow 1.6. Nios II Simple Socket Server Overview 1.7. Important NicheStack TCP/IP Stack Concepts 1.8. Where to Go Next 1.9. Hardware Setup Details 1.10. Document Revision History for the Using the NicheStack TCP/IP Stack - Nios II Edition Tutorial
1.4. Tutorial Files x
1.4.1. Hardware Design Files 1.4.2. Software Files
1.5. Software Development Flow x
1.5.1. Creating a New Nios II Project 1.5.2. Configuring the BSP 1.5.3. Examining the Nios II Simple Socket Server Project Files 1.5.4. Building and Running the Nios II Simple Socket Server Project 1.5.5. Interacting with the Nios II Simple Socket Server
1.6. Nios II Simple Socket Server Overview x
1.6.1. Software Naming Conventions 1.6.2. Software Architecture 1.6.3. MicroC-OS/II Resources
1.6.3. MicroC-OS/II Resources x
1.6.3.1. Tasks 1.6.3.2. Inter-Task Communication Resources
1.7. Important NicheStack TCP/IP Stack Concepts x
1.7.1. Error Handling 1.7.2. NicheStack TCP/IP Stack Default Task Creation 1.7.3. Creating Tasks that Use the NicheStack TCP/IP Stack Sockets Interface 1.7.4. Task Priorities in the Nios II Simple Socket Server Design 1.7.5. Task Stack Size
1.7.4. Task Priorities in the Nios II Simple Socket Server Design x
1.7.4.1. MicroC/OS-II Internal Tasks 1.7.4.2. NicheStack TCP/IP Stack Internal Tasks 1.7.4.3. Networking Initialization Task 1.7.4.4. User Networking Tasks 1.7.4.5. User Non-Networking Tasks
1.9. Hardware Setup Details x
1.9.1. Network Connection
1. Using the NicheStack TCP/IP Stack - Nios II Edition Tutorial

1.6.3.1. Tasks

The table below lists the MicroC/OS-II tasks that implement the Nios II Simple Socket Server application.

Table 2.  MicroC/OS-II Tasks for the Nios II Simple Socket ServerThe application creates the tasks listed in this table.
Task Description
SSSInitialTask() Creates an instance of all the MicroC/OS-II resources. Initializes the NicheStack TCP/IP Stack and the Nios II Simple Socket Server example RTOS structures and tasks.
SSSSimpleSocketServerTask() Manages the socket server connection, and calls relevant subroutines to manage the socket connection.
LEDManagementTask() Manages LEDBlinkTask, driven by commands received from a MicroC/OS-II queue, named SSSLEDCommandQ. The MicroC/OS-II mailbox, named SSSLEDFreqMailbox, passes blink rate values to the LED blink task.
The NicheStack TCP/IP Networking Stack creates two additional software component layer tasks: a main task that operates the networking stack, and a time-keeping task that the main task uses. The application creates the NicheStack TCP/IP Stack main task (tk_netmain) in the netmain() function with a priority of TK_NETMAIN_TPRIO. The application creates the time-keeping task (tk_nettick) in the netmain() call with a priority level of TK_NETTICK_TPRIO. For more information about these tasks, and how to set their priorities and stack sizes, refer to “Important NicheStack TCP/IP Stack Concepts”.
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