Can Anyone Help Me this Question??
1)how to Create the the Task in RTOS and How to set the Deadline to the Task and Priority of the Task
2)how to Write ISR in RTOS and it's step wise Procedure to write it
3) what is mean by Software Timer
3)how to write IPC like Shared memory And Message Queue in the RTOS
4) which APIs are used in Interrupt
4) how to send data using message Queue or Shared Memory
5)how to clear data in the message Queue
6)what is meaning by Task Notification and Task Queue and
6 Replies
@youcef_ali or @Marvee Amasi may be able to assist here
hi i'll be glad to help
@Prem Thengil Start first with this FreeRTOS Kernel Quick Start Guide
To get an overview
https://www.freertos.org/FreeRTOS-quick-start-guide.html
FreeRTOS
FreeRTOS - Quick start guide
FreeRTOS is a portable, open source, mini Real Time kernel. A free RTOS for small embedded systems
And read the official FreeRTOS Documentation you can download it from here
https://www.freertos.org/Documentation/RTOS_book.html
These resource are way helpful to go through,
Also let me answer your questions the best I can :
1) To create a task in an RTOS:
- Use an API provided by the RTOS, like
task_create() or xTaskCreate().
- Specify the task's function, priority, stack size, and other parameters.
- To set a deadline, some RTOSs offer deadline scheduling algorithms that you can configure when creating the task.
2) Writing an ISR (Interrupt Service Routine) in an RTOS:
- Identify the interrupt source and its corresponding interrupt number.
- Write the ISR function, adhering to the ISR syntax of your RTOS.
- Use APIs provided by the RTOS to handle any necessary operations within the ISR, like clearing interrupt flags or signaling tasks.
3) Software Timer:
- A software timer in an RTOS is a mechanism to execute a function or task after a specified period.
- You can create and configure software timers using RTOS-specific APIs, setting the timer duration and callback function to execute when the timer expires.
4) Writing IPC (Inter-Process Communication) mechanisms like Shared Memory and Message Queues in an RTOS:
- For Shared Memory: Allocate a memory region accessible by multiple tasks and use mutexes or semaphores to control access.
- For Message Queues: Utilize RTOS-provided APIs to create, send, receive, and clear messages between tasks.
Let's go on
5) APIs used in Interrupts:
- RTOS-specific APIs for enabling, disabling, and configuring interrupts.
- APIs for managing interrupt flags or registers associated with interrupt sources.
6) Sending data using Message Queues or Shared Memory:
- For Message Queues: Use RTOS-provided APIs to send data to a specific message queue, specifying the message and its size.
- For Shared Memory: Write data directly to the shared memory region, ensuring proper synchronization with mutexes or semaphores.
7) Clearing data in the Message Queue:
- Use RTOS-specific APIs to clear the message queue, removing any pending messages.
- Alternatively, read and discard messages until the queue is empty.
8) Task Notification and Task Queue:
- Task Notification: A mechanism in an RTOS to signal events or conditions to tasks, allowing them to synchronize or coordinate their actions.
- Task Queue: A queue data structure used within an RTOS to manage tasks waiting for execution, often prioritized based on task priority or other criteria.Thank for your response 👍
Thank you for your response 👍