topic DMA 'always on' source in Kinetis Microcontrollers

DMA 'always on' source

patricio — Fri, 19 Oct 2018 12:57:54 GMT

Hello,

I am having some difficuties with the DMA, and I would appreciate if somebody could help with the following doubts:

1) What should be the source to be choosed in a channel, if the request is comming from the major loop link of the previous channel? Any of the differents 'always on' source?

2) At the end of the following post, Help - continuous DMA with PIT , it says that there was a bug in the silicon when using PIT wiht 'always enabled' request. Is it fixed already?

Thanks for your help.

Re: DMA 'always on' source

jeremyzhou — Mon, 22 Oct 2018 03:16:11 GMT

Hi AITOR ARANZABAL,

Thank you for your interest in NXP Semiconductor products and for the opportunity to serve you.
1) What should be the source to be choosed in a channel, if the request is comming from the major loop link of the previous channel? Any of the differents 'always on' source?
-- Yes, any one of 'always on' sources is Ok.
2) At the end of the following post, Help - continuous DMA with PIT , it says that there was a bug in the silicon when using PIT wiht 'always enabled' request. Is it fixed already?
-- Before answering your question, I think you'd better tell me which chip you use.
Have a great day,
TIC

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Re: DMA 'always on' source

patricio — Mon, 22 Oct 2018 07:37:08 GMT

Hi Jeremyzhou,

I am using K64FN1M0M12, in the TWR-K64 board.

Thank you for your help.

Best regards.

Re: DMA 'always on' source

jeremyzhou — Mon, 22 Oct 2018 07:47:55 GMT

Hi AITOR ARANZABAL,

I've not found this bug record in errata of K64_120, so I think this errata is fixed now.
Have a great day,
TIC

Re: DMA 'always on' source

patricio — Mon, 22 Oct 2018 08:14:03 GMT

Hi Jeremyzhou,

I appreciate your quick response.

Thank you.