LPC54018, USB1 highspeed, problem when running SDK example application

[jukka1]

I am trying to use SDK example lpcxpresso54s018_host_cdc_bm from SDK_2_13_0_LPC54018.

The only change that I made to the example is that I changed USB_HOST_CONFIG_OHCI to 0 and USB_HOST_CONFIG_IP3516HS to 1 in usb_host_config.h. That is because I must use USB1 and highspeed.

I have a setup where I have:

-LPC54018 PCB (our own, based on a reference design)

-nRF52 dev kit acting as a CDC device, as described in the readme.pdf of the example.

These devices are connected via USB.

The example app starts ok. I can see these from the LPC54018 PCB console port:

[11:06:14:366] host init done␍␊
[11:06:14:366] This example requires that the CDC device uses Hardware flow␍␊
[11:06:14:397] if the device does't support it, please set USB_HOST_UART_SUPPORT_HW_FLOW to zero and rebuild this project␍␊
[11:06:14:397] Type strings, then the string␍␊
[11:06:14:397] will be echoed back from the device␍␊
[11:06:14:554] device cdc attached:␍␊
[11:06:14:554] pid=0x1015vid=0x1366 address=1␍␊
[11:06:14:554] cdc device attached␍␊
[11:06:14:586] cdc control transfer error␍␊

The problem is "cdc control transfer error", the communication between the boards does not work.

What could be the reason for this?

[jukka1]

So my setup consists now of two LPC54018 PCB's.

The first device runs SDK example lpcxpresso54s018_host_cdc_bm from SDK_2_13_0_LPC54018.

The second device runs SDK example lpcxpresso54s018_dev_cdc_vcom_bm from SDK_2_13_0_LPC54018.

The both examples are configured to use USB1 highspeed, and the devices are connected to each other with a USB cable.

The original examples work OK. When I send data bytes to device #1 terminal, the data is echoed back from device #2.

One notice though: If I try to modify the lpcxpresso54s018_dev_cdc_vcom_bm example so, that it sends data automatically e.g. once per second, it does not succeed. When data is sent from APPTask() (in virtual_com.c) by calling USB_DeviceCdcAcmSend(), the function returns always error kStatus_USB_Busy. The sending only succeeds once every time after APPTask() has received data from host (s_recvSize != 0).

BR,

jukka

[Alice_Yang]

Hello @jukka1 

For the USB demo, all USB actions are initialized by host, so when USB host ask USB Device send data, then USB device can send data.

BR

Alice

[Alice_Yang]

Hello @jukka1 

If still can't work, recommend:

1) First without any change, check whether USB0 can work well on your side.

2)About device, you can download the usb_device_cdc demo to another LPC board, then connect host and device.

3)Refer to readme.pdf to config HW and SW.

BR

Alice

[jukka1]

Hello @Alice_Yang,

I jumped directly to 2) and I got the USB communication between the boards working.

Now I modify the usb_device_cdc example to generate a lot of data, and let's see what happens ...

BR,

jukka

[Alice_Yang]

Hello @jukka1 

Switching USB demo from USB0 to USB1, you can refer to:

https://community.nxp.com/t5/LPC-Microcontrollers-Knowledge/LPC-ALL-Summary-of-Switching-USB-demo-fr...  

BR

Alice

[jukka1]

Hello @Alice,

Thanks for the link.
Seems that I have done the changes correctly.

BR,

jukka

[jukka1]

Just before the "cdc control transfer error" happens, the call stack is this:

Thread #1 57005 (Suspended : Breakpoint)	
	USB_HostCdcInterruptCallback() at host_cdc.c:415 0x6082	
	USB_HostCdcInterruptPipeCallback() at usb_host_cdc.c:193 0x9530	
	USB_HostIp3516HsTokenDone() at usb_host_ip3516hs.c:3,186 0x5070	
	USB_HostIp3516HsTaskFunction() at usb_host_ip3516hs.c:3,966 0xbd5c	
	USB_HostTaskFn() at app.c:123 0xc0a2	
	main() at app.c:248 0x5c1e	

The status is kStatus_USB_TransferStall in USB_HostCdcInterruptCallback().

[jukka1]

The readme.pdf of the example mentions a "CDC device".

I assume that nRF52 dev kit is a suitable "CDC device". If I connect nRF52 dev kit to Linux via USB cable, it emerges in Linux as ttyACM0. I can open that port with minicom or cutecom, and nRF52 echoes the written characters back.

The USB descriptors can be seen in nRF52-usb-descriptors_230613.log.

[jukka1]

Does anybody know, what kind of USB CDC device works with lpcxpresso54s018_host_cdc_bm example?
I tried an Android phone in USB tethering mode, but the example app was not happy with Android's USB descriptors.

BR,

jukka