Long gaps between SPI transmissions

marcingrzelak — Mon, 22 Oct 2018 18:50:42 GMT

Hi,

in my program I would like to read an external time counter by SPI and I would like to receive a fairly accurate time. But when I starts transmissions one after another, the difference between successive readings is ~70 us. A few us for SPI transmissions and remaining time is the gap between transmissions. How can I minimize this gap?

I'm using SPI by ioctl.

Thanks for help.

Re: Long gaps between SPI transmissions

igorpadykov — Tue, 23 Oct 2018 00:19:01 GMT

Hi marcingrzelak

gaps may be caused by delays intoduced by bus arbiters NIC-301 and

I am afraid there is no way to avoid it. If possible one can try to use bursts

configured by ECSPIx_CONREG register.

Best regards
igor
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Long gaps between SPI transmissions

Re: Long gaps between SPI transmissions