topic Re: dev_cdc_virtual_com task expansion using FreeRTOS possible? in Kinetis Software Development Kit

dev_cdc_virtual_com task expansion using FreeRTOS possible?

odt — Thu, 03 Mar 2016 09:31:50 GMT

In order to explore the possibilities of the USB on a FRDM-MKL27, I have used the dev_cdc_virtual_com (virtual_com) example using a Keil development suite. The example seems to be working though I experience problems expanding the number of tasks running. I have added a simple task that only is to toggle the LED and then wait.

Both tasks are executed during initialization before the OSA_Start is executed. Unfortunately only the first of the tasks is able to run - either the USB port OR the LED flashing. How to fix the minor expansion of the default example?

Re: dev_cdc_virtual_com task expansion using FreeRTOS possible?

odt — Thu, 03 Mar 2016 09:52:15 GMT

Attached is the modified file

Re: dev_cdc_virtual_com task expansion using FreeRTOS possible?

odt — Fri, 04 Mar 2016 13:54:28 GMT

Despite large stack it was too small....

Re: dev_cdc_virtual_com task expansion using FreeRTOS possible?

ivadorazinova — Mon, 07 Mar 2016 18:57:08 GMT

Hi Ole,

I recommend to you change priority for task 2.

You cannot have defined two tasks with the same priorities.

Please, set TASK_2_PRIO on value 5U

I hope this helps.

Best Regards,

Iva

Re: dev_cdc_virtual_com task expansion using FreeRTOS possible?

odt — Tue, 08 Mar 2016 07:45:32 GMT

It was based on a simple beginners fault - too small stack.

Problem solved.