Omega2 boot loop
-
After message
[ 18.768343] EEPROM:Read from [factory] offset 0x0,length 0x400.go reboot
-
@Andrey-Shafray said in Omega2 boot loop:
After message
[ 18.768343] EEPROM:Read from [factory] offset 0x0,length 0x400.go reboot
Power to the Omega 2 is probably inadequate. The next boot message after "EEPROM: . . ." is when the wifi turns on and there is a surge in current draw. Instead the processor has rebooted before that message can be output.
-
I use lm1117 3.3v to power omega.
-
@Andrey-Shafray Do you have input and output caps? The lm1117 specsheet does recommend you to have a 10uF cap on the input and 100uF cap on the output, if my memory serves.
-
@WereCatf Yes i have 10u input and 100u output
-
What is the source of power to the LM1117? I'd recommend something with 1 Amp or greater rating to eliminate that as a potential issue, though 0.5 Amps is probably enough.
It's also important that the wiring from the regulator to the Onion be short to minimize induction and of sufficiently heavy gauge wire to minimize resistance loses.
Tantalum capacitors have better high frequency performance than other electrolytic capacitors so they are preferred on the LM1117 output.
My working breadboard configuration is a USB power supply (nominally 5 volts) to an LM1117 essentially on the connector to the Onion with a 22 uF tantalum bypass capacitor on the LM1117 output. I've successfully run with a 0.7 Amp USB wall wart but tested initially with a 2.0 Amp unit.
-
now my omega is dead. It doesn't blink and response over uart. it produces peep and heats up(it use 0.24 amp)
-
.24 amps (240 mA) is well within the range of power consumption for common operational phases, especially when the time averaging of your measurement is unstated.
-
@Chris-Stratton
I not understand. My omega is not dead?
-
@Andrey-Shafray said in Omega2 boot loop:
@Chris-Stratton
I not understand. My omega is not dead?All that can be said is that your current measurement does not by itself indicate much.
If you could log instantaneous current over time and compare to the startup of a functioning board it might be possible to learn something. And that other person who measured more than an amp had in their measurement a clear indication of a problem, but your measurement is not outside the expected range, at least until its trend over time is considered in detail.
Note that it is not out of the question that connection of an unspecified ammeter inline could prevent the system from properly functioning.
