Re: [Libusb-devel] USB error: error writing to bulk endpoint 1: Connection timed out

[Peter S. <stu...@cd...>]

On Tue, Nov 23, 2004 at 11:33:56AM +0100, Simon Mikkelsen wrote:
> I'm trying to communicate with the Cypress EZ-USB FX2 development
> board, using bulk transfer, but for some reason I get a connection
> timed out message.
> When I invoke usb_set_altinterface I get -22 in return, which
> indicates and error, but I have not been able to find out what it
> means.
> 
> In the FX2 board I use an example program, which should loop back
> bulk data from endpoint 2 to endpoint 6. The program is known as
> bulkloop.hex

proc output showed that the device has two endpoints, 1 IN and 1 OUT.

I seem to recall that the FX2 boards need to have the firmware
(bulkloop.hex) downloaded to them and then reset through a soft
detach from the USB. In that case the FX2 is still waiting for the
download, which explains why there are no 2 IN and 6 OUT endpoints.

You shouldn't get -22 though, perhaps try different interface
settings?


//Peter