LAUNCHXL2-570LC43: RTI Timer Configuration after FreeRTOS Scheduler has started

Christoph Kurz

Hi,

I´m using the Launchxl2-570LC43 with FreeRTOS and want to configure a RTI- Timer during runtime, after the FreeRTOS-Scheduler has started.

When I initialize a second RTI Compare in the prvSetupTimerInterrupt(void) in os_port.c everything works fine. But I need to start/stop the timer as well as configure the comparevalue during runtime.

Whenever I try to write the "RTISETINTENA" or "Count0_Comp1"- Registers after calling vTaskStartScheduler(), i receive a "dataEntry" -Interrupt while Debugging.

How can I configure the RTI while the FreeRTOS-Scheduler is running?

Thanks and Regards,

Chris

over 5 years ago

0 Miro over 5 years ago

TI__Mastermind 21425 points

Hello,

Due to the US holidays, responses may be delayed.

0 Rex Chang over 5 years ago in reply to Miro

TI__Guru 50170 points

Hi, Chris,

FreeRTOS timer is a software timer task. You can't just modify the comapre value from another task. Have you tried using xTimerChangePeriod()?

Rex

0 Christoph Kurz over 5 years ago in reply to Rex Chang

Prodigy 30 points

Hi,

Thank you very much for your reply. The FreeRTOS Software timer didn´t solve my problem.

My Problem was the understanding of different operation modes in the ARM-Architecture in combination with the MPU. So I can´t simply get access to certain registers in user mode. Using the "portPRIVILEGE_BIT"-Setting in the xTaskCreate to give a Task privileged rights solved my issue. Now im able to start a 2. Timer using the Compare1 during runtime.

Best regards,

Chris

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LAUNCHXL2-570LC43: RTI Timer Configuration after FreeRTOS Scheduler has started