lpcware

can't get nxpUSBlib working with app uploaded by bootloader.

Discussion created by lpcware Employee on Jun 15, 2016
Latest reply on Jun 15, 2016 by lpcware
Content originally posted in LPCWare by mozmck on Mon Mar 26 11:22:59 MST 2012
I'm using an LPC1752 chip with nxpUSBlib v0.92 and a USB bootloader I wrote.  The bootloader puts the application starting at 0x2000, and that seems to work fine.  I can upload an application and it will run, blink lights, etc.

But the problem comes trying to get usb to work in the application.  I used the same code from the bootloader that does work, and just changed one string in the descriptor, but it never connects to the computer.  I can toggle an led and see that my code has not hung, but the usb does not work.  With a bit of testing it appears that DcdIrqHandler() gets called but SlaveEndpointISR() never does.

Is there something in the library that uses hard-coded addresses or something that would cause it not to work when the starting address is 0x2000?  Any ideas?

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