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OMAP4430 high resolution timestamps

Vanni Genua
Prodigy 30 points

Hi there,

I would like to know real time system clock frequency for OMAP4430,

I mean the maximum clock rate, to be intended as the maximum clock_gettime resolution,

e.g.  nanoseconds, microseconds ?

I don't know if there is only a  32kHz timer, that would mean timestamp resolution is 1/32kHz =30 microseconds.

Due to the fact I need to detect timestamps every 100 nanoseconds, this means a 32kHz timer is not enough.

So I would like to know if OMAP4430 has any high resolution timer and what is its granularity.

Has it?

  • 0
    Intellectual 270 points

    Hi Vanni,

    Do you mean that you need to time events with the precision of +/- 100 nanoseconds?  Or do you mean that events may be coming in as quickly as 100 nanoseconds apart?

    The GPTIMERs can be clocked from the system clock (12 to 38.4 MHz). So I believe you should be able to use one of the timer event capture inputs to start/stop the timer and then read out the result.

    Best regards,

    James Graves