On Fri, 05 Sep 2014 09:14:12 +0100 John Lewis <[email protected]> wrote:
> On 05/09/14 07:17, Denis 'GNUtoo' Carikli wrote: > > > 4. Use your rasberry and try to make g_dbgp work there, to test use > > the linux kernel with earlyprintk=dbgp. Note that earlyprintk=dbgp > > doesn't work out of the box on all distro's kernels, you need the > > right compilation options to make it work. > > > > Denis. > > That won't work, I think, as the Pi uses the same micro-USB port > you'd be using for debug, for power. Why is that a problem, you could: * Get an usb cable with two "host" connectors: one on for the target laptop, another one for the 5v power, and the usual one for the rasberry side. Such cables were common for mini-usb, for instance for hard disks that didn't have enough power with only one usb port. So you could get one, or make one, or make someone do it for you. * You may even not need such cable when testing g_dbgp and the kernel's earlyprintk. Denis.
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