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To begin Rtos with keil

arjun pal

Hi all,
Happy new yr.
I want to go for Real time coding for my applications.
Can anybody guide me to begin with RTOS,so that i can develop applications using Keil RTOS for Microcontrollers,Keil provide help documents but they are too early to begin without basic concept in RTOS.
Thanks in advance.
Regards
Naresh

Parents
  • 0 in reply to Ulf Sass

    i have begined with rtos,

    can anybody guide me for following

    1)how about initialising the system
    for eg port settings,baud rate,timer
    initialising,
    I cannot define initialisation in task,
    as each task this task switches it will
    go for reinitialising already
    initialised system ?
    2)how interrupts will be taken care ?
    will the interrupts becomes task
    specific ?
    3)I am using timer 1 for baud rate and
    timer 0 for some other application,on which
    timer rtx tiny works ?
    4)can system setting be changed each time
    as tasks changes(ie each task can have its
    unique setting) ?if yes how ?
    will this continuous change of setting
    affect CPU performance in long run ?
    Regards

Reply
  • 0 in reply to Ulf Sass

    i have begined with rtos,

    can anybody guide me for following

    1)how about initialising the system
    for eg port settings,baud rate,timer
    initialising,
    I cannot define initialisation in task,
    as each task this task switches it will
    go for reinitialising already
    initialised system ?
    2)how interrupts will be taken care ?
    will the interrupts becomes task
    specific ?
    3)I am using timer 1 for baud rate and
    timer 0 for some other application,on which
    timer rtx tiny works ?
    4)can system setting be changed each time
    as tasks changes(ie each task can have its
    unique setting) ?if yes how ?
    will this continuous change of setting
    affect CPU performance in long run ?
    Regards

Children
  • 0 in reply to arjun pal

    No body has reply to above questions ?

  • 0 in reply to arjun pal

    I'm using RTX tiny for C166. For C166 information about RTX/RTX tiny are in the the Assembler Manual. See the simple rtx examples, then the "traffic"-example and make some experiments. For RTX tiny 166 the answers are:
    1)
    The first task (task 0) should initialise the system. Create the other tasks. Then terminate task 0 with the os_delete_task(0) command.
    2)
    The task switch interrupt has the lowest priority, so the other interrupts will stop task switching.
    3)
    You will find this in the asm-manual. It is possible to change the rtx-timer if need to do.
    4)
    I don't think that this is possible. What settigs do you want to change?
    In RTX tiny (round robin!) task switches occur after a predefined time. After a short time the program execution continues at this point.

    Ulf

  • 0 in reply to Ulf Sass

    Thanks Ulf,this reply will help me,but i have other doubts too.Will talk later.