Re: Simple iso code isn't sending any data at all (not even a request)?

That would only work for oscilloscopes with an external display or
triggering, wouldn't it?
To view and log waveforms in real time you'd need to stream data.
Bulk could be used with some sort of handshaking attached, but samples
would be lost if the host doesn't request packets regularly.
The microcontroller I'm using has only 2kB of RAM (only about 1kB of which
I can reserve for the USB buffers) and I plan on sending 500kB/s per second
to the host, so if a new 500 byte packet isn't sent each frame then
everything will get corrupted.

Unless Bulk transfer can more or less "guarantee" a packet every ms on a
not-so-busy bus?

On 8 June 2015 at 12:03, Xiaofan Chen <[email protected]> wrote:

> On Sat, Jun 6, 2015 at 2:42 PM, Chris E <[email protected]> wrote:
> > P.S. Yes, the application requires that I use iso.  It's a USB
> oscilloscope!
> >
>
> I do not know enough of libusbK to support you on the codes. But this
> sentence is not correct. I believe Bulk Transfer is good enough and
> it is probably the majority of the USB Oscilloscope uses.
>
> USB ISO transfer is mainly meant for audio and video.
>
> --
> Xiaofan
>
>
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