LPC1769 as USB Host Controller for CDC

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LPC1769 as USB Host Controller for CDC

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lpcware
NXP Employee
NXP Employee
Content originally posted in LPCWare by muamw10 on Wed Feb 29 13:28:17 MST 2012
I'm working on a M2M project and need to interface to a wireless modem (verizon network) using CDC.  I have the wireless modem dev board working as a USB CDC Serial device when I connect it into my PC and I can send it AT commands and get responses.

I have also setup the expresso board able to be seen as a CDC Serial device using the CDC example code.

But now, I need to make the LPC1769 the actual Host Controller to talk to the wireless modem.  I've been hacking on the USBHostLite example code, but it fails at HOST_GET_DESCRIPTOR() inside Host_EnumDev().

When it fails,
TDHead->Control == 0x5e040000
Bit 18 is set, which means CRC/Time Out Error according to:
http://download.intel.com/technology/usb/uhci11d.pdf

Any ideas on why the device won't enumerate?  Is USBHostLite too "Lite" to handle a CDC Serial device?

Thanks,
Andrew
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