topic Re: LPC43XX: General Purpose DMA doc? in LPC Microcontrollers

LPC43XX: General Purpose DMA doc?

a_bet — Mon, 13 Mar 2017 17:02:09 GMT

Hi to you all,
as I already pointed out (LPC43XX: Timer triggered DMA transfer? ) I'm having a lot of troubles using the GPDMA on LPC4370.
Searching the web I found this useful doc: https://www.mikrocontroller.net/attachment/28181/gpdma.pdf (attached below, also)
Unfortunately as you can read is "a draft full of errors", is there an updated version of this doc?
Or another resource I can use, I'm a bit stuck at the moment.

Thank you in advance.

Andrea

Re: LPC43XX: General Purpose DMA doc?

jeremyzhou — Wed, 15 Mar 2017 08:21:24 GMT

Hi Andrea Bettati,

Thank you for your interest in NXP Semiconductor products and

for the opportunity to serve you.
I've amended the LPCOpen demo to meet your goal which setup the match event to trigger the DMA transferring.
And you can learn the detailed reply in the https://community.nxp.com/thread/446219
Have a great day!

Best regards,

Ping

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Re: LPC43XX: General Purpose DMA doc?

a_bet — Thu, 16 Mar 2017 18:41:10 GMT

Hi jeremyzhou‌ thanks for the reply. I think that this peripheral is complex: other company have Application Notes about the functioning of their DMAs, are there some resources of this kind from NXP regarding the GPDMA in LPC43XX?

Re: LPC43XX: General Purpose DMA doc?

leecoakley — Tue, 03 Apr 2018 22:38:02 GMT

Old question, but for the benefit of those searching - which was me last week! - here is a link to the ARM documentation for the GPDMA block (PL080). It goes into considerable detail and I was able to implement a nice driver based on this and the NXP docs.

Re: LPC43XX: General Purpose DMA doc?

a_bet — Fri, 15 Jun 2018 17:57:04 GMT

Oh man if I only had found this while working on my thesis...