How to use GPT timer Channels on RT1024

Patrick_K — Tue, 19 Sep 2023 16:02:00 GMT

Hello,

currently I am trying to evaluate the i.MX RT1024 for use in a future product.

I'm trying to create a simple application with two timer driven subsystems, where one subsystem is executed at 1ms and the other subsystem is executed at 10ms.

I chose to use channel 1 and 2 of GPT2 for this purpose. However, when I run the project, both of the subsystems run at the same 10ms rate.
How can I run two tasks from the same timer but from different channels using the MBDT?

The attached solution is the closest I could manage. The attached model is entirely self-contained - no need for the simulink project (if you are asked to open the project file as well)

Re: How to use GPT timer Channels on RT1024

georgevictor — Thu, 12 Oct 2023 15:16:56 GMT

Hi, @Patrick_K,

Thank you for using MBDT for i.MX on your projects.

I have downloaded the attached example and tried to run it on my side considering your specific requirements of using the GPT2 instance with two channels configured but I didn't encounter any issues.

I have replaced the two subsystems provided with an LED toggle, but I have kept the logic for the interrupts generated by the GPT2 peripheral. The attached example demonstrates how the board LED is controlled by two interrupts from channel 1 and channel 2. The interrupt from channel 2 occurs every 2 seconds and turns on the LED, while the interrupt from channel 1 occurs every 2.5 seconds and turns off the LED right after it has been on for 0.5 seconds.

In the picture below is the actual configuration, where I highlighted the Output Compare interrupt enablement for both Channel 1 and Channel 2, along with the Compare value (period) that is set to 2 seconds for the second channel and to 2.5 seconds for the first one.

Please let me know if this model works as expected on your side and if it helps you find the issue with your project.

Cheers,

Victor

topic How to use GPT timer Channels on RT1024 in Model-Based Design Toolbox (MBDT)

How to use GPT timer Channels on RT1024

Re: How to use GPT timer Channels on RT1024