LPC1769 as USB Host Controller for CDC

lpcware — Thu, 16 Jun 2016 02:09:56 GMT

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

topic LPC1769 as USB Host Controller for CDC in LPCXpresso IDE

LPC1769 as USB Host Controller for CDC