Hello,
I am planning to build an api for the freertos .In the start i just need to execute some simple task.Is this possible.to create an api and What kind of information will be required by the api to execute a task.?

FreeRTOS already has an API. I have no idea what you are talking about.

thanks for replying.Actually i want to build my own API ,which in the start has the capability of executing simple task and later on i can add some more functionality.Is it possible to create your own api ?

No, you can't. The total amount of APIs was determined by God - it's not possible to create any more APIs than those already existing.

Sure you can make your own API. But why? What's wrong with the standard API, and how could you improve it by wrapping it with another API? Or don't you want to use the standard-API, then you're going to write a OS from scratch. Good luck, wrong forum.

Have you already used FreeRTOS, played with one of the demos?
What do you think an API is?