Connecting USB stack to TCP/IP stack, where and how

[ThomNet]

Hi,

my name ist Thomas.

I'm using the MQX 3.7 library + a tower system with a Kinetis TWR K60 N512 board + a TWR SER board.

I'm trying to "connect" the MQX USB stack (the K60 is running in host mode, using the cdc device class) to the TCP/IP stack of the MQX RTCS, so that an UMTS modul (this is the USB device, which supports the cdc driver), which is receiving a HTTP request over the air can talk to the RTCS webserver via USB.

Does anybody have an idea, which function I have to use, to make this connection work?

Thanks in advance for each idea, even just a hint, where to look in the doc's!!

Thomas

[Martin_ · Accepted solution]

Hi Thomas,

Check PPP driver that is in the MQX RTCS.
Example: c:\Freescale\Freescale MQX 3.8\rtcs\examples\shell\
and MQX RTCS User's Guide Example: Setting Up RTCS (Set up RTCS with one PPP device and one ethernet device).

Next example to look at is
c:\Freescale\Freescale MQX 3.8\usb\host\examples\cdc\cdc_serial\

cdc_serial opens a file. this file you would pass to PPP_initialize,
assuming "tty0:" is installed and opened USB CDC Host file:

/*Set up PPP Driver: */
pfile = fopen("tty0:", NULL);
pio = _iopcb_ppphdlc_init(pfile);
error = PPP_initialize(pio, &phandle);

I'd recommend to use the latest MQX release. MQX 3.8.1 is the actual release at the moment, 4.0 will be released by the end of 2012.

[ThomNet]

Hi Martin,

I’m working on the above example, where they say on page #8:

“Note, that one needs two serial line connections between the PC and the evaluation board -

one for the PPP communication (ittyb) and the other for the serial shell (ttya/default). In case

the PC has just one RS232 you can use USB-to-Serial adapter. If the application is started on

the embedded side run the PPP connection on the PC side.”

Do you know a clever idea, how to create the second RS-232-port on my TOWER system? Just adding a second TOWER-SER-board?

Or do I need to solder?

Thanks in advance

Thomas

[ThomNet]

Hi Martin,

thanks for your quick response.

My very best.

Thomas Hülsmann

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Wir wünschen Ihnen eine schöne Zeit!

==============================

Von: Martin Latal mailto:admin@community.freescale.com

Gesendet: Montag, 26. November 2012 14:14

An: Thomas Hülsmann

Betreff: Re: MQX Software Solutions - Connecting USB stack to TCP/IP stack, where and how

<https://community.freescale.com/index.jspa> Freescale Community

Connecting USB stack to TCP/IP stack, where and how

created by Martin Latal <https://community.freescale.com/people/Martin_> in MQX Software Solutions - View the full discussion <https://community.freescale.com/message/307897#307897>