How can I reduce the time between byte to byte when use spi tx ?

[浩卢]

How can I reduce the time between byte to byte when use spi tx ?

I'm now using kernel version linux-4.1.15.The hardware is I.MX6UL-EVK board.

[igorpadykov · Accepted solution]

Hi

please try to use bursts, please check description register  ECSPIx_CONREG field

BURST_LENGTH in sect.20.7.3 Control Register (ECSPIx_CONREG)

i.MX6UL Reference Manual

http://cache.freescale.com/files/32bit/doc/ref_manual/IMX6ULRM.pdf

If possible increase clock frequency, max. is defined in sect.4.12.2 ECSPI timing parameters i.MX6UL Datasheet

http://cache.freescale.com/files/32bit/doc/data_sheet/IMX6ULCEC.pdf

Best regards
igor
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