Help for Mass Storage Host

Discussion created by lpcware Employee on Jun 15, 2016
Latest reply on Jun 15, 2016 by lpcware
Content originally posted in LPCWare by Marco72 on Mon Nov 14 22:53:13 MST 2011
Hi , I am studying the mass storage host example.
My enviroment is LPCXpresso v4.0.5 [Build 123] + LPCXpressso LPC1769 REV B, plugged on a breadboard where is the USB connector ( and some resistor as for some examples found on LPCXpresso support forum).
The lib is "nxpUSBlib v0.90 beta"

I have 3 USB memory key, 2 of them work without errors but one not work.

The not working naturally works plugged to PC.

Debugging I found that the program remain always locked in WaitForTransferComplete function when this function is called within MS_Host_RequestSense because of calling EVENT_USB_Host_DeviceEnumerationComplete.

So the enumeration happen but there is a problem in "sense requesting".

Thank you very much for any help to understand what happen.