• State Not Answered
  • Locked Locked
  • Replies 3 replies
  • Subscribers 22 subscribers
  • Views 985 views
  • Users 0 members are here
Options
Related
How was your experience today?
This discussion has been locked.
You can no longer post new replies to this discussion. If you have a question you can start a new discussion

Multi-tasking...

Tommy Kwan

I want to read a character input from the keyboard so I used..

getchar();

The problem is, I want to be able to continue on with my program if user does not enter any character from the keyboard. The solution I have in mind is to do multi-tasking, but I am not sure if 8051 supports it. Also, I know that in C++, there is a function called..

peek();

This will return out of its function if a key is not pressed. So I want to know if C has a function similar to this...

thanks
Tommy

Parents
  • 0

    Maybe RTX51 Tiny is the answer of your question.

    However, I found it too restrictive on calling same function from several tasks (even if the function is reentrant).

    Maybe RTX51 is the solution, but I wrote a simple scheduler which runs the registered functions with the given periods. This way I can check the keyboard for hits and debounce the keys.

    But, I do not know if this is the proper way.

Reply
  • 0

    Maybe RTX51 Tiny is the answer of your question.

    However, I found it too restrictive on calling same function from several tasks (even if the function is reentrant).

    Maybe RTX51 is the solution, but I wrote a simple scheduler which runs the registered functions with the given periods. This way I can check the keyboard for hits and debounce the keys.

    But, I do not know if this is the proper way.

Children
  • 0 in reply to Bahri Okuroglu

    Just write your own character fetch routine (http://www.8051.com has a multitude of suggestions). If you are not doing something complicated, do not consider an RTOS it will - if character fetch is your only problem - give you more headaches than writing a character fetch routine. You can write the routine to return 0 or ff if no char is available, if all 256 codes are possible make a global flag character_present set by character fetch, reset by "main"

    Have fun,

    Erik