On 29 Sep 2015 11:20, "Daniel Thompson" daniel.thompson@linaro.org wrote:
On 28/09/15 19:52, Grant Likely wrote:
PS Does anyone have a canned command to deliberately corrupt the
boot-and-rootfs so I can get the board to jump into fastboot (so I can try a snapshot) without having to take the sensors board of the top so I can press Vol- ;-) ?
You should be able to use the Sonic Screwdriver 96boardsctl utility to reset the board. It twiddles the reset line on the LS connector, which is the same signal as Vol- (at least, so I'm told)
Ah... Reset == Vol-Down. I didn't think if that (Esla: that would explain
why the reset button on the Sonic Screwdriver didn't do what we were expecting).
Anyhow the trick works.
That said, rather frustratingly the trick only works when I can
physically un/plug the power to the main board (if I use the 'screwdriver to simulate a long press off SW2 the board doesn't revisit fastboot properly).
I think we need some help from our Qualcomm friends here on a reset sequence. The 'screwdriver has access to the power and reset button signals, and I can make them be twiddle in whatever order is required.
Does perhaps Vol- need to be held down before pressing power?
g.