i.MX ProcessorsのトピックRe: Does the imx8mp processor have a precise timer

Does the imx8mp processor have a precise timer

xjy198903 — Fri, 08 Dec 2023 08:22:25 GMT

Does the imx8mp processor have a precise timer with absolute accuracy that is not affected by system scheduling,for example, if I want to time 1us, I can implement a hardware timer with a precision of 1us?

Re: Does the imx8mp processor have a precise timer

Zhiming_Liu — Thu, 14 Dec 2023 02:28:35 GMT

Please refer General Purpose Timer (GPT)

Re: Does the imx8mp processor have a precise timer

xjy198903 — Thu, 14 Dec 2023 09:42:08 GMT

can i use it in user space or applications?

Re: Does the imx8mp processor have a precise timer

xjy198903 — Sat, 16 Dec 2023 08:23:40 GMT

anyone knows?

Re: Does the imx8mp processor have a precise timer

Zhiming_Liu — Mon, 18 Dec 2023 06:21:10 GMT

1. You need import them in dts.

https://lore.kernel.org/linux-arm-kernel/eb608fd4-7b97-8d7b-5855-0f953832bf9a@denx.de/T/

https://github.com/torvalds/linux/blob/master/arch/arm64/boot/dts/freescale/imx8mp.dtsi

2.For userspace api, we don't have such demo.