topic Re: LPC54018, USB1 highspeed, USB stall during bulk transfer in. in Processor Expert Software

LPC54018, USB1 highspeed, USB stall during bulk transfer in.

jukka1 — Sat, 10 Jun 2023 07:36:05 GMT

Hi,

I am experiencing a mysterious issue with USB bulk transfer.

The source code is modified from lpcxpresso54s018_host_cdc_freertos example.

LPC54018 USB1 (host) is connected to SierraWireless RC7620 modem.

Everything works fine until a longer TCP data transfer happens from modem to host.
Then the transfer ends in USB functional stall at bulk transfer in.

E.g FTP transfer of 466 byte file from FTP server to LPC succeeds, but FTP transfer of 468 byte file always ends in USB stall.

The modem operation is verified with LPC18S37, it works without problems.

So it seems that the reason for the problem is USB stack and/or USB1 in LPC54018.

Has anybody any glue, what could be the reason for this kind of behaviour?

Re: LPC54018, USB1 highspeed, USB stall during bulk transfer in.

ZhangJennie — Thu, 15 Jun 2023 03:47:19 GMT

Hi jukka1

Which version of SDK do you work with?

Thanks

Jun Zhang

Re: LPC54018, USB1 highspeed, USB stall during bulk transfer in.

jukka1 — Thu, 15 Jun 2023 08:38:08 GMT

Hi,

I am working with SDK_2_13_0_LPC54018. I downloaded it a couple of weeks ago from NXP site.

BR,

jukka

Re: LPC54018, USB1 highspeed, USB stall during bulk transfer in.

ZhangJennie — Fri, 16 Jun 2023 03:33:48 GMT

Hi jukka1,

There is no related known USB issue in 2_13_0.

We need to know the detail steps of how to reproduce this issue with nxp demo board and sdk?

Thanks,

Jun Zhang

Re: LPC54018, USB1 highspeed, USB stall during bulk transfer in.

jukka1 — Tue, 20 Jun 2023 04:30:11 GMT

Hi Jun Zhang,

OK.

Yes, I understand. That is why I am about to arrange a simplified setup.

But I have another issue with that setup. I opened a new discussion about it (LPC54018-USB1-highspeed-problem-when-running-SDK-example). Weird, that also that issue is related to USB stall, although most probably the root cause is not the same.

BTW, do you know what are the acceptable values for USB_HOST_SEND_RECV_PER_TIME (in host_cdc.h)?

I am currently using a value 300U for it.

BR,

jukka

Re: LPC54018, USB1 highspeed, USB stall during bulk transfer in.

ZhangJennie — Mon, 19 Jun 2023 09:04:48 GMT

host_hdc.h, is that NXP SDK file?

Re: LPC54018, USB1 highspeed, USB stall during bulk transfer in.

jukka1 — Tue, 20 Jun 2023 04:33:19 GMT

Oops sorry, the file name is host_cdc.h.

I corrected it also to the message above.

So host_hdc.h => host_cdc.h.

Re: LPC54018, USB1 highspeed, USB stall during bulk transfer in.

ZhangJennie — Wed, 21 Jun 2023 04:49:31 GMT

For USB_HOST_SEND_RECV_PER_TIME, Please test the value with 64 or 32

Re: LPC54018, USB1 highspeed, USB stall during bulk transfer in.

jukka1 — Sat, 01 Jul 2023 09:48:13 GMT

We succeeded in fixing the issue by removing the following lines from https://github.com/nxp-mcuxpresso/mcux-sdk-examples/blob/main/lpcxpresso54s018/usb_examples/usb_host_cdc/bm/host_cdc.c#L223

if (cdcInstance->bulkInMaxPacketSize == dataLength) { /* host will prime to receive zero length packet after recvive one maxpacketsize */ USB_HostCdcDataRecv(g_cdc.classHandle, NULL, 0, USB_HostCdcDataInCallback, &g_cdc); }

We did not yet analyse deeply, what was wrong with the bulk transfer transaction.

But probably RC7620 modem caused USB stall in bulk in, when it received a zero byte payload in bulk out.

BR,

jukka

Re: LPC54018, USB1 highspeed, USB stall during bulk transfer in.

jukka1 — Sat, 01 Jul 2023 11:16:14 GMT

We have used now value 512 and even 768 for USB_HOST_SEND_RECV_PER_TIME.

Then it works better for our use cases.

BR,

jukka