Kinetis Microcontrollers中的主题 Re: MK66 USB device is not detecting ?

MK66 USB device is not detecting ?

karthikas — Fri, 16 Sep 2016 05:26:11 GMT

I am working with MK66FN2M0VLQ18 MCU in our customized board.for the USB device mode.(USB High speed mode).

I have downloaded SDK_2.0_MK66FN2M0xxx18 , and running USB_DEVICE_CDC_VCOM .

It was running upto APPTASK() without any problem , but It has stopped in APPTASK(), and device is not getting detected in PC.

Can anyone help me in resolving the issue as soon as possible.

Thank you.

Re: MK66 USB device is not detecting ?

Hui_Ma — Sun, 18 Sep 2016 06:13:31 GMT

I had tested the KSDK V2.0 [usb_device_cdc_vcom] example on FRDM-K66F board without any problem.

Could you double check the High speed USB related circuit with FRDM-K66F board schematics? The FRDM-K66F board schematics could be downloaded from here.

Wish it helps.

Have a great day,
Ma Hui
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Re: MK66 USB device is not detecting ?

Hui_Ma — Tue, 20 Sep 2016 06:09:40 GMT

Could you try to remove C6 & C7 capacitors at USB_D+ and USB_D- pin?

Wish it helps.

Re: MK66 USB device is not detecting ?

karthikas — Tue, 27 Sep 2016 06:23:29 GMT

Thank you for the reply.

i have made some hardware changes, now the hardware side i don't have any problem but , I have some problem in USB driver. The device is not properly detecting, In PC its showing unknown device, also I tried to update driver but its not happening. I have checked the properties of unknown device it doesn't have any information like PID,VID etc.

I have debug the code , I am getting reset interrupt, but not getting SOF(start of frame interrupt) instead i am getting port change interrupt ,what's the mistake, Is there any changes has to be done in SDK_2.0_MK66FN2M0xxx18 stack.

thank you..,

Re: MK66 USB device is not detecting ?

Hui_Ma — Thu, 29 Sep 2016 08:09:41 GMT

There with system oscillator crystal frequency difference (FRDM-K66F is using 12MHz, your board is using 16MHz).

If customer had modify KSDK software <clock_config.c> & <clock_config.h> files with correct clock info.

And if customer is using MCG works in PEE mode with external crystal clock as PLL reference clock?

Which usb example demo customer is using to test your board USB function?

Thank you for the attention.

Re: MK66 USB device is not detecting ?

karthikas — Thu, 29 Sep 2016 09:55:44 GMT

Hai Hui_Ma.,,

I am using USB_CDC_VCOM example of SDK_2.0_MK66FN2M0xxx18.

Yes I have done the changes in <clock_config.c> & <clock_config.h>, its working fine and device is enumerated as virtual COM device. Can I achieve 480Mbps(USB-HS ) speed with COM port device.

Instead of COM port device I want to enumerate as common CDC class device(USB bulk device), Is there any changes has to be done in descriptors or in USB stack. do I need to modify in PC side driver(DLL).

Thank you.,

Re: MK66 USB device is not detecting ?

Hui_Ma — Mon, 03 Oct 2016 12:57:14 GMT

Thank you for the patience.

I am on vacation now and will be back to office at Oct. 8th. I will check this issue when I am back to office.

Thank you for the patience. Sorry for that may bring any inconvenience to you.

Have a great day,
Ma Hui

Re: MK66 USB device is not detecting ?

Hui_Ma — Sun, 09 Oct 2016 01:36:35 GMT

The USB speed is USB_SPEED_HIGH, which will transfer USB data package using 480Mbps.

The virtual serial port with setting serial baud rate limited the USB port transfer speed.

Currently, the KSDK V2.0 USB Stack provides support for CDC ACM, which is defined in CDC PSTN Subclass. In addition, the Microsoft RNDIS is also implemented upon the CDC ACM driver.

Wish it helps.

Re: MK66 USB device is not detecting ?

cutworth — Sun, 09 Oct 2016 05:17:09 GMT

Hi Karthik,

Could you share complete schematic for HS USB part? It's not very clear from the image you shared. What's the output on VREG_OUT pin when you plug in USB cable to PC?

Hao

Re: MK66 USB device is not detecting ?

karthikas — Thu, 13 Oct 2016 04:30:34 GMT

Hii.,Hui_Ma & Cutworth Wang.,

Sorry for the late reply,Actually I was on vacation.

I have customized the USB moss storage(usb_msc_ramdisk) example as per our requirement, I have changed class & subclass to '0', the device is getting detected and working with our customized PC driver. Now two bulk endpoints are available to send & receive data other than control enpoints.

I want to send and receive data through bulk endpoints, Is there send & receive functions already available in usb_msc_ramdisk example, or else which functions I have to use in usb_msc_ramdisk example. And which is receive status flag.

Re: MK66 USB device is not detecting ?

cutworth — Thu, 13 Oct 2016 06:36:14 GMT

Hi Karthik,

I suppose you are using KSDK2.0 code. You can refer to usb_device_msc.c file. Send and receive function with MSC buld endpoint is as follows.

usb_status_t USB_DeviceMscSend(usb_device_msc_struct_t *mscHandle);

usb_status_t USB_DeviceMscRecv(usb_device_msc_struct_t *mscHandle);

The receive status flag you asked for is kUSB_DeviceMscEventReadRequest which is inside USB_DeviceMscCallback function. The callback is called inside USB_DeviceMscRecv with code like below and USB_DeviceMscBulkOut for bulk OUT endpoint callback function will call USB_DeviceMscRecv.

mscHandle->configurationStruct->classCallback((class_handle_t)mscHandle, kUSB_DeviceMscEventWriteRequest, &lba);

Hao

Re: MK66 USB device is not detecting ?

karthikas — Fri, 14 Oct 2016 10:09:33 GMT

Hai Cutworth Wang.,

I am waiting for your reply. How do I implement send & receive function, where do I get endpoints event(Bulk_IN & Bulk_OUT). Because of I am using USB moss storage(usb_msc_ramdisk) example, it has so many function which are not related to my requirement, I need to modify this and implement simple send & receive functions through Bulk endpoints available.

While enumeration process I have modified configuration and device descriptors, and enumeration process happens perfectly , usb device also getting detected, But here after I got stuck.

Now USB device enumeration got completed and two Bulk endpoints are available, Could you please help me in writing & reading data from this endpoints.

Please get back to me as soon as possible.

Thank you...,

karthik AS

Re: MK66 USB device is not detecting ?

cutworth — Wed, 19 Oct 2016 06:48:37 GMT

Hi Karthik,

I understand what you need now. You intend to bypass the logic for MSC and just use the BULK endpoint to send and receive data right?

Let explain how the USB stack works when it tries to send and receive data with its endpoints.

When USB device receives either IN or OUT token from USB host, it will call USB_DeviceNotification() inside usb_device_dci.c file. At the end of that function, you will see the following code which calls registered endpoint callback function.

/* Call endpoint callback */
error = handle->endpointCallback[(uint8_t)((uint32_t)endpoint << 1U) | direction].callbackFn(
handle, &endpointCallbackMessage,
handle->endpointCallback[(uint8_t)((uint32_t)endpoint << 1U) | direction].callbackParam);

The prototype of this endpoint callback is inside usb_device.h

typedef usb_status_t (*usb_device_endpoint_callback_t)(usb_device_handle handle,
usb_device_endpoint_callback_message_struct_t *message,
void *callbackParam);

For the MSD disk demo, you will see USB_DeviceMscEndpointsInit function called inside USB_DeviceCallback function once USB passed enumeration and received kUSB_DeviceEventSetConfiguration event. Inside USB_DeviceMscEndpointsInit function, it registered both USB_DeviceMscBulkIn and USB_DeviceMscBulkOut as BULK IN and OUT endpoint callback function. The prototype is the same as the endpoint callback function. Here you can redefine what you need to send and receive data on BULK endpoints.

Hao

Re: MK66 USB device is not detecting ?

karthikas — Mon, 24 Oct 2016 18:22:54 GMT

Hai Cutworth Wang.,

Thank you for the reply.

Yes I understood the USB stack working . Once device get enumerated I am getting kUSB_DeviceEventSetConfiguration event , there I am trying to call receive function. but receive function returning kStatus_USB_Error.

I am calling this function >>

extern usb_status_t USB_DeviceRecvRequest(usb_device_handle handle,uint8_t endpointAddress,uint8_t *buffer,uint32_t length);

with Bulk out end point address.

Can you please tell where I did mistake or how do use these functions to receive and send data to PC.??

If I need to use

usb_status_t USB_DeviceMscRecv(usb_device_msc_struct_t *mscHandle);
usb_status_t USB_DeviceMscSend(usb_device_msc_struct_t *mscHandle);

these function, which one is the mscHandle pointer. And how can I modify these function to call send and receive function with Bulk endpoints.

Please get back to me soon..

Thank you..

Regards .,

Karthik

Re: MK66 USB device is not detecting ?

cutworth — Tue, 25 Oct 2016 02:45:12 GMT

Hi Karthik,

Before you call USB_DeviceRecvRequest after you received kUSB_DeviceEventSetConfiguration event, did you initialized the bulk endpoint with something like USB_DeviceMscEndpointsInit?

Did you have a chance to trace the USB_DeviceRecvRequest? I looked at the internals for this function and cannot find a code path which will set return value to kStatus_USB_Error, it will finally set to other return values, either success or other error code. So I need to know which error actually occurred.

For your case, it's not suggested you call USB_DeviceMscRecv or USB_DeviceMscSend for sending bulk in or out data. These two functions is for MSD class which has some layer added upon the bulk endpoint, so data is send in CBW and CSW stage.

Hao

Re: MK66 USB device is not detecting ?

karthikas — Tue, 25 Oct 2016 07:40:52 GMT

Hai Cutworth Wang.,

Thank you so much for your help, yes some small modification need to be done in USB_DeviceMscEndpointsInit , now the device is able to receive data from the PC.

But once I receive data, data receive response is not sending from controller that is why if I send data again from PC it was getting stall error, how do I resolve this and How do I get Call back function Like USB_DeviceMscCallback . Is there any modification need to be done in endpoint call back function.

Thank you.,

Regards.,

Karthik

Re: MK66 USB device is not detecting ?

cutworth — Tue, 25 Oct 2016 09:21:39 GMT

Hi Karthik,

So did you change the USB_DeviceMscBulkOut as well so the BULK OUT endpoint callback is handled? Basically what you need to do is to get BULK OUT endpoint ready for next BULK OUT transfer by calling USB_DeviceRecvRequest if you expect PC will send more data.

Hao

Re: MK66 USB device is not detecting ?

karthikas — Tue, 25 Oct 2016 17:06:33 GMT

Hai Cutworth Wang.,

No I didn't modify anything in USB_DeviceMscBulkOut and Bulk OUT endpoint callback functions.

Yes once data received I am calling USB_DeviceRecvRequest again, but still its giving Stall error when I send data from PC. I think its because of acknowledgment for the first reception was not done from controller to PC , that is why PC is still waiting for acknowledgement.

And If call back function is properly handled, when data received from PC one of the following event in USB_DeviceMscCallback should come

case kUSB_DeviceMscEventReadResponse:

case kUSB_DeviceMscEventWriteResponse:

But these events are not occurring even after data received successfully.

Thank you.,

Regards

Karthik

Re: MK66 USB device is not detecting ?

karthikas — Fri, 28 Oct 2016 07:12:23 GMT

Hai Cutworth Wang.,

Thank you very much for the help, USB moss storage example working fine and board can able to send & receive data from PC.

Now I tried to extract the code from SDK2.0 stack to create my own project, but it was giving number of error. I just created empty project and copied all file including start up files and all header file from stack.

How do I create my own project in our specified folder, and I don't want to link header files from other place, all the files I am using need to be in my project folder.

Thank you.,

Re: MK66 USB device is not detecting ?

cutworth — Fri, 28 Oct 2016 08:42:21 GMT

Hi Karthik,

You can download the project generator tool from KSDK page and use it to create or clone a KSDK based project. It can be a standalone project.

Software Development Kit for Kinetis MCUs|NXP

Hao