Re: Intel Edison USB host mode

The Edison will show -99 for 'lsusb' when the host mode is disabled. This may be one of a couple of reasons:

1. External power is not being used, i.e. you're using battery power. The board needs 5V or greater for usb host mode, so power via the 5v USB (but you want to use that for the camera, so no go there), or the 7-15v supply.
2. You're not using a USB-OTG cable. i.e. one with pins 1 and 2 shorted. There's a gotcha here, in that I found some cables that looked like OTG cables, but were not, they were simply adapters without those pins shorted. Once I purchased a cable that said OTG on the packaging, the error -99 went away, as I was able to see my camera. I then made up a custom cable with the correct connectors on each end for my camera project to make things all nice and neat.

So once you're using external power and a USB-OTG cable, you should be able to see external devices with lsusb.

Rgds,

Dav.e