how usbdromstack is different from device stack part of nxpusblib ?

[sudheerv]

Except residing in ROM ,,how usbdromstack is different from device stack part of nxpusblib?

what benefits i get by using usbdromstack instead of nxpusblib,, excluding space and speed.

i mean code wise any new features available ?

i need to implement a custom class driver( for  usb device controller)  .

for this i am in dilemma ,weather to select open source nxpusblib or closed usbromstack.

( i assume there is no much changes b/w device stack part of nxpusblib and usbromstac

so want to go for nxpusblib as it is open.--- is this fine ??).

Any suggestions will be helpful.

[Carlos_Mendoza]

Hi Sudheer,

The main differences between LPCUSBlib and USBD are these:

- USBD is the library equivalent to the USB ROM driver for most current MCUs.
- Since USBD is essentially the USB ROM driver, the source code is not publicly available.
- The LPCUSBlib device stack is an older USB stack that we no longer support in LPCOpen but has the source code available.

As far as I know, the two USB stacks are very similar in what they support but ultimately unless you need to make modifications to the library source, I would advise you to use the USBD library

Hope it helps!

Best Regards,
Carlos Mendoza
Technical Support Engineer