Question regarding triggering ADC with FlexTimer in MK60 processors?

cancel
Showing results for 
Show  only  | Search instead for 
Did you mean: 

Question regarding triggering ADC with FlexTimer in MK60 processors?

681 Views
bert_haj-ali
Contributor I

Hello,

I am using a development board that has the K66 processor on it and it is Arduino-compatible; it's called the Teensy 3.6. I am programming it through the Arduino IDE.

I want to read voltage and current of a full bridge converter output using ADC sampling. I created a center-alligned PWM using FTM1 and set ADC1 to be triggered with FTM1 following the application notes AN4410 and AN5142. 

My question is should I used both ADC's to read the current and the voltage, or should I use one ADC to read both?

Also, should I synchronize FTM1 with other FTM's that I am using to generate the full bridge PWM signals?

Code is attached.

Thanks in advance

0 Kudos
1 Reply

597 Views
mjbcswitzerland
Specialist V

Hi

If you use one ADC you can use HW trigger mode to sample two inputs. There will be a delay between the two samples since this represents two conversions.

You can do the same using two software triggered samples (changing the channel between the two).

To get samples of the two values at the same point in time two ADCs need to be used since they can sample/convert in parallel.

Regards

Mark

Complete Kinetis solutions for professional needs, training and support: http://www.utasker.com/kinetis.html

Kinetis K66:
- http://www.utasker.com/kinetis/TWR-K65F180M.html
- http://www.utasker.com/kinetis/FRDM-K66F.html
- http://www.utasker.com/kinetis/TEENSY_3.6.html
uTasker: supporting >1'000 registered Kinetis users get products faster and cheaper to market

Request Free emergency remote desk-top consulting at http://www.utasker.com/services.html

Open Source version at https://github.com/uTasker/uTasker-Kinetis

https://community.nxp.com/thread/512558

0 Kudos