i.mx7 ULP - Example for using ADC together with eDMA required

[klaas]

Hi all,

I'm trying to setup the internal ADC of an i.mx7 ULP using DMA transfers. Unfortunately I can't find any examples (there is only a polling and an interrupt example).

Also I don't really succeed implementing it using the reference manual. I think I mangaged to setup the DMAMUX properly but after that I have no clue on how to continue.

Can anyone provide an example?

Thanks
Klaas

[klaas]

Hi Igor, thanks for your reply. Unfortunately it is not really obvious how to connect both examples.

It's clear that I can enable the ADC interrupt with the IE register. But where can I set the destination adress, where the DMA should write the value to? And where can I configure the interrupt, that let's me know when the DMA finished writing a value?
Do I need to enable the DMA again after every read like it is done in the edma_lpuart example?

Thanks
Klaas

[igorpadykov]

Hi Klaas

internally there is no such example, in such cases may be recommended to proceed

with help of NXP Professional Services to develop it:

https://contact.nxp.com/new-prof-svcs-sw-tech

Best regards
igor

[igorpadykov]

Hi Klaas

internally there is no such example, in such cases may be recommended to proceed

with help of NXP Professional Services to develop it:

https://contact.nxp.com/new-prof-svcs-sw-tech

Best regards
igor

[igorpadykov]

Hi Klaas

I asked internally, below answer from team:

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Customer may refer to the lpadc and edma examples in SDK.

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Best regards
igor