i.MX ProcessorsのトピックRe: imx 6 + periodic timer + linux

imx 6 + periodic timer + linux

ssinfod — Tue, 19 Aug 2014 19:10:06 GMT

Hello,

I'm using a imx 6 sabrelite board with the linux kernel (yocto project "dora release").

I want to call a function 64 times per second with this ARM processor.

Ideally, I don't want too much jitter. I want to perform a task periodically... (ie: scanning a device)

I'm thinking to use a timer of the i.mx 6 and generate an interrupt 64 times per second ? (EPIT timer?)

Is it possible to do that with yocto and the imx 6 ?

Can somebody give me some examples or let me know where I can find documentation about this ?

Where can I find examples on the usage of the EPIT timer ?

thanks

ssinfod

alejandrolozan1 — Mon, 25 Aug 2014 17:26:32 GMT

Hi,

After checking the source code, I noticed that the GPT is used for the Kernel and I did not fidn anytyhing used by the EPIT.

I recommend you to use that module. You can find the source code at arch/arm/mach-imx/epit.c

There are no examples in the kernel source code but I believe you can use it as reference.

Best Regards,

Alejandro

ssinfod — Tue, 26 Aug 2014 02:48:43 GMT

I'm just starting with linux development...

Do you think that I should use the EPIT in User space or in Kernel Space ?

Thanks for your time,

ssinfod

alejandrolozan1 — Wed, 10 Sep 2014 20:45:19 GMT

Hi,

I would use it in kernel space, but at the end your application will run in user space correct?

analogicstechin — Wed, 07 Mar 2018 12:33:40 GMT

HI,

I want to generate 1 micro sec (1usec) delay in my driver using EPIT (Enhanced Periodic Interrupt Timer) .is it possible ?

if it possible can please share kernel API (or) EPIT driver. we using 4.1.15 kernel .