topic Re: imx6ul gpio in i.MX Processors

imx6ul gpio

ninghongxie — Sat, 10 Nov 2018 02:43:04 GMT

If imx6ul uses gpio_set_value function to simulate a certain time sequence, it will cause CPU occupancy rate to be particularly high. If I operate the GPIO DR register myself, this will not happen.

Re: imx6ul gpio

igorpadykov — Tue, 13 Nov 2018 23:16:02 GMT

Hi ninghong

you are right, also one can look at below link for suggestions how to increase speed

https://community.nxp.com/message/841330?commentID=841330#comment-841330

Best regards
igor
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Re: imx6ul gpio

ninghongxie — Wed, 14 Nov 2018 01:58:24 GMT

Hi igorpadykov

Thank you for your advice, but I think this is a different case. Now I am driven by linux, frequently calling the interface gpio_set_value will cause the whole Linux system to become very slow, and even affect other functions.

Re: imx6ul gpio

ninghongxie — Wed, 14 Nov 2018 02:27:31 GMT

Can imx6 GPIO set registers that specify a bit change? So I can use registers to control my driver directly. Not considering mutex