On Thu, Jun 19, 2014 at 07:58:49PM +0200, Samuel Bryner wrote:
> Hi,
>
> Is there a way to get a callback when there is data available to read?
>
> As far as I can see, you can either:
>
> - poll ftdi_read_data()
> - create a ftdi_transfer_control with ftdi_read_data_submit() and poll
> that (with the additional drawback that you need to know the amount of
> data you want to read beforehand)
> - directly use libusb, defeating the point of libftdi somewhat.
>
> This would be nice for asynchronous writes as well, maybe even with some
> sort of intermediate progress callback.
>
> ftdi_readstream() seems to go into the right direction but uses a
> special synchronous FIFO mode.
I'd say: that'd be tricky to implement: your program "has control"
over the thread, and when it is not checking the FTDI chip, it's
simply not checking the FTDI chip! So the library would have to create
a separate thread and call your callback from the other thread, or
maybe something with signals, and then call your callback from the
signal.
Definitively not "trivial to add".
Roger.
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