Kinetis MicrocontrollersのトピックRe: usb composite demo on kinetis k60

usb composite demo on kinetis k60

prashantdev — Thu, 18 Jul 2019 12:30:38 GMT

hi,

I am trying to use usb_cdc_msd demo from freescale usb stack 4.1. on k60n512vmd100 tower kit. My PC detects both storage and virtual com port. I'm able to access storage but when I try to open COM port it says "Port is being used by another application". I've windows 8.1 on my PC. I thought it was driver issue but when I ran cdc_demo from example projects then virtual com port is working properly. Can someone help ??

Re: usb composite demo on kinetis k60

FelipeGarcia — Mon, 22 Jul 2019 17:35:51 GMT

Hi Prashant,

Please check the jumper settings. I was able to run the cdc_msd and communicate with CDC port with no issue.

I used the Freescale USB Stack v4.1.1 from https://www.nxp.com/webapp/sps/download/license.jsp?colCode=USB_STACK_V4.1.1 , TWR-K60N512 and TWR-SER as development boards and Windows 10 OS.

To see the jumper settings please check https://www.nxp.com/docs/en/user-guide/TWR-K60N512-UM.pdf on chapter 2.11.

Have a great day,
Felipe

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Re: usb composite demo on kinetis k60

mjbcswitzerland — Mon, 22 Jul 2019 21:53:39 GMT

https://community.nxp.com/thread/508303

Re: usb composite demo on kinetis k60

prashantdev — Fri, 26 Jul 2019 04:41:08 GMT

Thanx Felipe for ur repsonse. I tried above USB stack and made the jumper setting according to the document but problem is the same. Device get enumerated as storage and COM Port. I can access storage but can't open the port. I am attaching the error snapshot.

Re: usb composite demo on kinetis k60

FelipeGarcia — Tue, 30 Jul 2019 21:26:23 GMT

Hi Prashant,

I tried the example using TeraTerm. Also, could you please try by disabling the device and then enabling. You can do that with right-click the virtual COM port in the device manager.

Hope it helps.

Best regards,

Felipe