Micro-controller Internal USB controller

[PRASAN DUTT RAJU]

Generally we use FTDI or CP2102 for USB to serial bridge controller. But recently in one of my project I've used LPC13xx in which there is internal USB controller.

So my question is how a host detect if the attached device having IC has its own internal USB controller? Will it behave in the same way as that of a normal hardware attached to the host?

As my project hardware is not finished now so I'm unable to check the behavior of the device. Anyone, who have used latest ICs which has its internal USB controller , Please help.

 

[FvM]

USB device properties are anounced to the host by descriptors. The host don't need to know which hardware is used in an USB device.

 

[PRASAN DUTT RAJU]

Thanks for the reply, but I'm still not clear. Does it need any driver for assigning COM port to the attached device? In case it requires are there separate drivers provided according to different chip architectures like ARM, AVR & so?

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Thanks for the reply, but I'm still not clear. Does it need any driver for assigning COM port to the attached device? In case it requires are there separate drivers provided according to different chip architectures like ARM, AVR & so?

 

[FvM]

An USB-to-serial bridge can use the Windows standard driver usbser.sys. You have to provide an *.inf file that associates the PID and VID numbers defined in your device descriptors with this driver. The endpoints defined in the descriptors must be compatbible with the structure expected by usbser.sys.

To learn about the requirements, you'll best review the CDC device examples available for most USB microcontrollers.