pylon:
I only find all the time a complete fabric USB Hub with 4 ports or more.
What's the problem with them? You can close the case of the two additional ports or fill them with hot glue if you really don't want them to be available.
can I use 2 Host USB shield using a rewiring of the SS pin to communicate with the Arduino Uno?
Yes, you can but you have to almost completely rewrite the software for it. Don't think of this to be an easy task, you have to have some in-depth knowledge of the USB bus protocol as well as of the used chip set. Sure you have the library for the one shield version but you may get some serious problems extending that for a second shield (as felis already told you).
Well I don't get why I could have 2 host shield connect to the same arduino.
They are 2 separated SPI slaves. What is the difference is the library between using one or two Host USB shield? What is the difference between a common multiple slaves SPI usage?
dxw00d:
I think the OP is trying to overcome a lack of physical security with a form of hardware solution to prevent people from accessing mass storage devices. We use endpoint security software. It lets users plug in anything they like, but if it hasn't been authorised, the OS can't access it.
Well the mass storage part is a bonus I will say but what I want to is to have 2 HID connected to my board and send to the computer using RS232 the data acquisition.
How can I do that without using the Host USB shield control by SPI.
To me I have to options: 1 Host USB shield + 1 HUB USB and one arduino UNO to send the data to the computer or 2 Host USB shield + the arduino UNO.
The problem with the HUB Usb is that at the end I want to have everything on my board (hub + max3421E + ATmega328 + other components to make it works and communicate with the computer).
So for the prototype I can use a complete fabric Hub (2 or more ports) but for my final board I will need to include it in my board. That's why I need a component who can be the same on my proto and my final board. And I don't find any USB Hub controller for that.
I you can suggest me one it would be helpfull.