vTaskList() for task status dump in FreeRTOS - Mini Project: Build & Apply

Using vTaskList() to Dump Task Status in FreeRTOS

📖 Scenario: You are working on a FreeRTOS-based embedded system. You want to see the status of all running tasks to understand how your system is behaving.

🎯 Goal: Learn how to use the vTaskList() function to get a snapshot of all tasks and their states, and then print this information to a console.

📋 What You'll Learn

Create a character array buffer to hold the task list output

Define the buffer size as 512 bytes

Call vTaskList() with the buffer to fill it with task information

Print the buffer content to the console using printf()

💡 Why This Matters

🌍 Real World

Embedded developers often need to check which tasks are running and their states to debug and optimize system performance.

💼 Career

Understanding how to use FreeRTOS diagnostic functions like vTaskList() is important for embedded software engineers working on real-time systems.

1

Create a buffer to hold task status output

Create a character array called taskListBuffer with size 512 to hold the task status output.

FreeRTOS

# Create a character array called taskListBuffer with size 512
# Your code here

Need a hint?

This buffer will store the text output from vTaskList().

2

Define the buffer size variable

Create an integer variable called bufferSize and set it to 512 to represent the size of taskListBuffer.

FreeRTOS

char taskListBuffer[512];
# Define an integer variable bufferSize and set it to 512
# Your code here

Need a hint?

This variable helps keep track of the buffer size for safety.

3

Call vTaskList() to fill the buffer

Call vTaskList() with taskListBuffer as the argument to fill it with the current task status information.

FreeRTOS

char taskListBuffer[512];
int bufferSize = 512;
# Call vTaskList() with taskListBuffer
# Your code here

Need a hint?

This function fills the buffer with a formatted list of all tasks.

4

Print the task status buffer to console

Use printf() to print the contents of taskListBuffer to the console.

FreeRTOS

char taskListBuffer[512];
int bufferSize = 512;
vTaskList(taskListBuffer);
# Print the taskListBuffer content using printf
# Your code here

Need a hint?

The output will show a table header and task details. Make sure to print the buffer as a string.