Use FlexPWM output as QTimer clock

kendalla59 — Tue, 02 Jun 2020 00:20:33 GMT

I am using a FlexPWM to generate the step signal for a stepper motor driver chip. I want to keep an exact count of the number of steps I command to the chip. My plan is to route the FlexPWM output to a QTimer, but I'm a bit confused on how to go about doing this. I'll need to setup the pinmux appropriately of course.

Assuming I can jumper a wire from the PWM pin to an input pin, how do I configure the QTimer block? Can I skip the jumper wire and simply use the Xbar for this? I'm fairly new to the RT so this has me stumped for now.

Thanks!

Re: Use FlexPWM output as QTimer clock

FelipeGarcia — Thu, 04 Jun 2020 22:01:38 GMT

Hello Kendall,

I recommend you to check our qtmr_inputcapture_outputpwm SDK example. You can download the SDK in this link.

Welcome | MCUXpresso SDK Builder

This project is a demonstration of the SDK QTMR driver's input capture and output pwm feature.

Hope it helps!

Best regards,

Felipe

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topic Re: Use FlexPWM output as QTimer clock in i.MX RT Crossover MCUs

Use FlexPWM output as QTimer clock

Re: Use FlexPWM output as QTimer clock