i.MXRT1060 ADC external trigger (ADC_ETC) for ADC 2

[cedric1]

There are two instance of ADC in i.MXRT1060. I can make ADC 1 work with external trigger on pin J11 GPIO_AD_B1_00 using ADC channel 5. This pin can also work with ADC 2. I can make ADC 2 work fine when using software trigger, but I can't make it work with external trigger. I think it has something to do with the TSC. I did try to set ADC_ETC.TSC_BYPASS and  ADC_ETC.EXT0_TRIG_ENABLE. Any idea why I can't make ADC 2 work with ADC_ETC on this pin?

Thanks,

Cedric

[jeremyzhou]

Hi Cédric Lemay,

Thank you for your interest in NXP Semiconductor products and
for the opportunity to serve you.
I'd like to gather more information about your implementation,
so whether you can introduce the steps you did, especial the code parts.

Have a great day,
TIC

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[cedric1]

Hi jeremyzhou, 

I found my problem. Turns out I had to use XBAR1, instead of XBAR0, to trigger ADC2. I couldn't find anything on the documentation about that, so I had to guess and try. It works now.

Thanks,

Cedric

[jeremyzhou]

Hi Cédric Lemay,

Thanks for your reply and I'm glad to hear the problem is solved.
According to your reply, whether it means tha you need to use the XBAR1(XBARA), the XBAR2 and XBARB (XBARB) is unavailable.

Have a great day,
TIC

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- We are following threads for 7 weeks after the last post, later replies are ignored
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