How to accelerate the GPIO speed

[jingyangxie]

I have an imx6sx motherboard that uses GPIO to simulate serial bus output. According to the manual, set SPEED = 11, SRE = 1, DSE = 2, and find that the clock output of GPIO analog is only a few hundred K. How can I increase the output frequency of GPIO?

[igorpadykov]

Hi jingyang

one can try suggestions on

https://community.nxp.com/message/920894?commentID=920894#comment-920894 

Best regards
igor
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[jingyangxie]

Hi，igorpadykov

    what's the value of kDevice,kShareable,kRWAccess in the function mmu_map_l1_range(0x00a00000, 0x00a00000, 0x0f600000, kDevice, kShareable, kRWAccess)?I can't find the definition of these values

[igorpadykov]

rt-thread/mmu.c at master · RT-Thread/rt-thread · GitHub 

[jingyangxie]

Hi,igorpadykov

     I download the sdk,How do I use these files in Linux 4.1.15 for imx6sx?

[igorpadykov]

you should develop such solution yourself. NXP does not support it in its BSPs.

Best regards
igor

[jingyangxie]

Thx