topic Re: i.MX RT1062: What is channel group on ADC in i.MX Processors

i.MX RT1062: What is channel group on ADC

kenji — Tue, 13 Jul 2021 10:18:06 GMT

Hi All

What is channel group on ADC?

I can' t find out in the i.MX RT1060 Processor Reference Manual about it.

But there is on MCUXpresso Config Tools and SDK functions.

What is the relation ship with ADC1/2 moudle and ADC external signals (pins)?

Re: i.MX RT1062: What is channel group on ADC

victorjimenez — Wed, 14 Jul 2021 22:48:33 GMT

Hi Kenji,

The RT1060 family has two ADC modules, ADC1 and ADC2, each module has 8 channel groups. These channel groups correspond to registers ADC1_HC0, ADC1_HC1, ADC1_HC2, ADC1_HC3... and ADC1_R0, ADC1_R1, ADC1_R2, ADC1_R3... The same applies to the ADC2 module.

I understand your point. With the current information of the reference manual, it's confusing to know what are the channel groups. I will pass these comments to the documentation team.

Regards,
Victor

Re: i.MX RT1062: What is channel group on ADC

kenji — Thu, 15 Jul 2021 08:05:59 GMT

Hi victorjimenez-san

I undersatnd that each ADC modules has 8 channel groups.
So, these 8 channel groups, each could have several ADC signal, like below?

I want to use PWM and ADC in synchronization.
In this case, is the ADC done in group units?

I want to know about the relationship of group and signal.

Re: i.MX RT1062: What is channel group on ADC

victorjimenez — Fri, 16 Jul 2021 16:52:31 GMT

Hi Kenji,

So, these 8 channel groups, each could have several ADC signal, like below?

Yes, your understanding is correct. There's only one thing to keep in mind. ADC_HC0 can be used for both software and hardware trigger mode. Other ADC_HCn (n = 1...) are for use only in hardware trigger mode. For more information regarding this, refer to section 66.8.1 of the reference manual.

want to use PWM and ADC in synchronization.
In this case, is the ADC done in group units?

You have to use these registers, ADC_HCn, no matter the functionality.

Regards,
Victor

Re: i.MX RT1062: What is channel group on ADC

kenji — Mon, 19 Jul 2021 01:22:17 GMT

Hi, victorjimenez-san

There are still issues, but ADC can now be performed in synchronization with PWM. I've gradually come to understand the settings in Config Tools.