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Re: [Discuss-gnuradio] Standalone USRP1 Operation
From: |
firasmail2000 |
Subject: |
Re: [Discuss-gnuradio] Standalone USRP1 Operation |
Date: |
Fri, 24 Apr 2009 01:50:35 -0700 (PDT) |
Hi,
> On Fri, 4/24/09, Tony Naggs <address@hidden> wrote:
>
> The short answer is that the PIC 18F4550 processor will not help.
> USB needs a "host" (typically a PC) that times & controls each data
> packet and a "device" to talk to. Optionally a hub is both a device
> and relay of timing & data to further devices. Both the PIC processor
> and the USRP are devices, and cannot talk to each other.
So USB device can only talk to USB Hub.Thanks for this clarification.
> Also the USRP documentation says it needs "USB2", which I
> think means it needs the "High Speed" data transfer of USB2. Whereas
> the PIC 18F4550 only supports the lower transfer speeds of USB1.1
I mentioned PIC16F4550 as an example for mcu that has a USB port. Actually, I
didn't checked whether it supports HS or FS (Sorry for bad example).
> An easier path would be to look small processor boards such as those
> that support embedded Linux. For instance the web page for the
> Gumstix Overo Earth says it has a "USB HS Host" and a micro SD slot.
> (Not micro SDHC - so you are limited to, I think, 4Gb cards.)
> See:
> http://gumstix.com/store/catalog/product_info.php?cPath=31&roducts_id=211
Thank you for your suggestion, but I'm looking for cheep and simple method to
load USRP firmware.
Best Regards,
Firas