06-21-2018, 01:29 AM
(06-18-2018, 02:24 AM)superpat Wrote: Trying with many Linux images and Android, also 3 different 12v power supplies I constantly see a major issue to achieving successful booting.
Just note that depending on which linux image you use, it will be unstable - this is known issue and is software related, NOT hardware. This is also 100% repeatable, including third reboot complete system failure with some images.
(06-18-2018, 02:24 AM)superpat Wrote: 3. Pressing power switch either does nothing, no reboot or reboots to hang at end of Uboot as above.
See if pressing and holding to force power off, and then a short press to power on does anything?
(06-18-2018, 02:24 AM)superpat Wrote: The first thing that strikes me is that the board starts to boot at the INSTANT of power connection. There does not appear to be any delays to allow power supplies to settle, there needs to be a short delay to allow the power supplies on the board to stabilise before the boot runs.
It seems as though the SBC logic is not cleared or reset properly on initial power up. in fact the reset does nOt reset properly.
It appears that the reset push button doesn't reset properly.
You might have to press and hold the reset button down for a second... I suspect there is a minimum result pulse time period, and it hasn't been implemented. Startup on instant of power connnect seems normal... that's what all my other boards do... you see the initial boot0 etc messages if you have a serial console connected as that kicks in milliseconds of power up.
