ZedBoard USB ports under OSL

Can someone explain the differences between a "standard" USB port on a PC and the UART and OTG ports on the ZedBoard when running the "out of the box" OSL that comes on SD card with the board.?

I have a program that works on a PC (RHEL) when connected to a device via USB that I want to run from the ZedBoard. Should I use UART or OTG?

I have already modified the ramdisk so that inittab does not start start a shell on the uart port.

Thanks in advance

0 Former Member over 9 years ago

Hello,

The USB-UART port on the ZedBoard appears as a serial comm port to the application running on the ZedBoard. On the host PC end you will need a driver for the Cypress USB to UART device. So, if you want the ZedBoard to appear as a serial comm port use this port.

The OTG USB port on the ZedBoard can be configured as either a 'host' or 'device' USB port. The default is to operate as a 'host' USB port (from the ZedBoard point of view). There is an example of this shown in 'Demo 6' of the ZedBoard Getting Started Guide that can be found here:

http://zedboard.org/support/documentation/1521

So, if you want the ZedBoard to act like a USB host to a USB device this is the port you would want to use. Determining if the application you want to run will work with the Digilent 'Out of the Box' LInux will be for you to determine.

-Gary
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0 Former Member over 9 years ago in reply to Former Member

Thanks Gary, yes I read that in the manuals :) my question was more simple - which UART or OTG behaves like a normal USB port on a PC?
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0 Former Member over 9 years ago

The OTG USB port.
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