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Timer in us

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Drave Dravenburgh
Posted by Drave Dravenburgh
on Apr 17 2012 03:02 AM
Prodigy200 points

Hello,

i need a timer to count in us not ms for the cc2540.

How can i realize that ?

I know the source code but i see no way to change that.

Thank you.

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  • Drave Dravenburgh
    Posted by Drave Dravenburgh
    on Apr 17 2012 03:45 AM
    Prodigy200 points

    Ok, in buzzer.c i found what i need to create a pwm Signal.

    But, isn't there a problem with osal, because it uses the timers too ? Because if i use a timer, osal doesn't know it ?

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  • 1960865
    Posted by 1960865
    on Apr 17 2012 08:10 AM
    Intellectual775 points

    Have you tried using the Alt functions of timer 3? see table 7-1 Peripheral I/O Pin Mapping, which is as you indicated it is currently being used by Buzzer.  I think OSAL is using other timers.

    You can also route the internal/external 32khz clock to p0.0 or p0.1. (I have not done that but did read about it in manual).

    both references are from swru191c - CC254x User's Guide.pdf

    good luck

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  • Drave Dravenburgh
    Posted by Drave Dravenburgh
    on Apr 17 2012 08:12 AM
    Prodigy200 points

    Will there be no crash because i use 2 timers in osal ? (if i use timer 3)

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  • Eng351
    Posted by Eng351
    on Apr 17 2012 14:08 PM
    Expert2980 points

    OSAL only uses the MAC Timer (Timer2) and SleepTimer, you should be able to use Timer1,3 & 4 with no problems unless another hardware library is also using them

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