On Tue, Jul 31, 2012 at 1:08 AM, Alan Stern wrote:
> On Mon, 30 Jul 2012, Alexey Filin wrote:
>
>> > Yes, something like it might work, I think. But you probably wouldn't
>> > want to use URBs for this; they have too much overhead. You'd need a
>> > m
On Thu, Jul 26, 2012 at 7:47 PM, Alan Stern wrote:
> You can do this only by hacking up a special driver of your own.
> Since transfer completions would not be reported by IRQs in time, you
> would have to poll for transfer completions at microsecond intervals.
> This would present a rather large
On Sat, Jul 28, 2012 at 8:50 PM, Clemens Ladisch wrote:
> Alexey Filin wrote:
>> On Fri, Jul 27, 2012 at 5:04 PM, Peter Stuge wrote:
>>> If you require consumer interfaces and you want neither USB nor
>>> Ethernet then I guess there is only FireWire left to choose fro
On Fri, Jul 27, 2012 at 9:08 PM, Peter Stuge wrote:
>> 2. To provide link to external bus adapter with 1 us delay and use the
>> same USB link from first use case. Not possible with USB. :(
>
> You didn't expand on the details, as I asked for, so I can't really
> comment much more.
>
> The point I
On Fri, Jul 27, 2012 at 7:10 PM, Alan Stern wrote:
> On Fri, 27 Jul 2012, Alexey Filin wrote:
>
>> So USB is not a "classic" bus and not universal, it is a network with
>> non-constant delay.
>>
>> Are there USB controllers with the "synchronous tran
On Fri, Jul 27, 2012 at 5:04 PM, Peter Stuge wrote:
> Alexey Filin wrote:
>> So USB is not a "classic" bus and not universal, it is a network
>> with non-constant delay.
>
> Whatever "classic" bus means.. USB is a packet-based communications
> bus with
On Thu, Jul 26, 2012 at 7:59 PM, Hans Petter Selasky wrote:
> On Thursday 26 July 2012 17:47:11 Alan Stern wrote:
>> To get maximum throughput you should submit multiple URBs originally,
>> and then submit a new URB whenever an URB completes. I recommand using
>> a pipeline depth of 10-20 ms. Fo
On Thu, Jul 26, 2012 at 7:47 PM, Alan Stern wrote:
> On Thu, 26 Jul 2012, Alexey Filin wrote:
>
>> Hello,
>>
>> I work in a scientific organization (www.ihep.su, experiments in high
>> energy physics). My colleagues developed a crate controller with
>> buffer
Hello,
I work in a scientific organization (www.ihep.su, experiments in high
energy physics). My colleagues developed a crate controller with
buffer memory and a usb interface (read out module, rom) to read out
crate electronics with cypress ez-usb sx2 (cy7c68001). I developed a
(Linux) kernel dri
