K64 FreeRTOS + USB CDC using MCUXpresso/SDK

[razed11]

A few years ago I developed an application using MQX with the K64 and it was a good experience. Recently I was asked to work on a different project and it used this setup but installing the tools and using the older version of KDS was quite painful (at least on a Mac) due to the lack of continuing support of MQX.

Now I'd like to use K64 with FreeRTOS and USB but I believe that MCUXpresso only has a driver for a baremetal implementation i.e. no RTOS. I don't understand USB at a low level but I suspect that there are real-time needs such as timeouts so using the baremetal with an RTOS will not be sufficient.

Maybe I'm incorrect and there is a FreeRTOS port. Recommendations?

Thanks.

[danielchen]

Hi Kenny

Just an information that MCUXpresso SDK has FreeRTOS support for USB cdc driver.

Please refer to the following demo on the SDK installation folder

FRDM-K64F_2.4\boards\frdmk64f\usb_examples\usb_device_cdc_vcom\freertos

Regards

Daniel

[mjbcswitzerland]

Hi Kenny

K64 FreeRTOS USB-CDC is included in the uTasker project. Load the binary attached to a FRDM-K64F board,connect to USB (auto-install on Win 10), open a terminal emulator on the VCOM that appears and communicate with a FreeRTOS task.
Built with MCUXpresso and works on any Kinetis part with USB (supports up to 6 VCOM ports, optionally with USB-UART bridges and various composite configurations; industrially proven in many Kinetis products since 2012).

Regards

Mark

Kinetis: http://www.utasker.com/kinetis.html
Kinetis K64:
- http://www.utasker.com/kinetis/FRDM-K64F.html
- http://www.utasker.com/kinetis/TWR-K64F120M.html
- http://www.utasker.com/kinetis/TEENSY_3.5.html
- http://www.utasker.com/kinetis/Hexiwear-K64F.html

[razed11]

Thanks Mark. We'll check it out. We're always on the lookout for reasonably priced tools for USB and TCP/IP.