Is LPC546XX USB ROM API support composite device?

[wangyanjun]

Is LPC546XX USB ROM API support composite device?

What is the difference between USB Stack in SDK and USB ROM API? Which one should I use?

Thank you!

[Omar_Anguiano · Accepted solution]

Hello Yanjun Wang

Only the USB stack in the SDK supports composite devices. The main difference can be in the USB RAM memory they use. I compiled two USB projects, one with the rom api and the other with the SDK USB stack. These were the results:

For ROM API:

With SDK USB Stack:

Use the one you think is more adequate based on your project requirements.

Let me know if this is helpful, if you have more questions do not hesitate to ask me.

Best regards,

Omar