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Calculating delay for Toggling LED to visually check for data transmission

Dino David
Intellectual 645 points
Other Parts Discussed in Thread: HALCOGEN

I am transmitting data to another board and use LED toggling to verify the data transmission. Since I need to visibly make sure that the data is tranmsitted, I have to give a certain delay (bsically a simple while/for loop). I have come across function with a value inside the loop. I need to know the basis for that value in the loop.

For example ,

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for(i=0U;i<xxxxU;i++)
{
}/* Wait */

 How to decide a value of XXXX to select a 4ms delay????

Also how do I decide a delay of 4ms in my TI-Hercules TMS570LS3137. Could anyone please explain.?

  • 0
    Guru 15175 points
    Good day have you!

    for such things you should use the RTI, this gives high precision delays.

    Halcogen >> Examples >> example_rtiBlinky.c

    to vary the time value, you must use the function:

    void rtiSetPeriod ( uint32 compare, uint32 period )

    if you want to use the method of delays by loops, no repeatable timing when you try to use delays microseconds.


    Regards
    Martin V.