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Dangerous Prototypes

Dangerous Prototypes => Bus Pirate Development => Topic started by: malware on March 02, 2015, 02:28:52 am

Title: I have a power failure occurs.
Post by: malware on March 02, 2015, 02:28:52 am
Hello


I finished the settings enter the "W" command, the following error occurs


-------------Error Messages-----------------


VREG too low, is there a short?
Power supplies OFF

--------------------------------------------


Do you know about how to resolve the error?
Title: Re: I have a power failure occurs.
Post by: DangerByte on March 02, 2015, 04:37:10 pm
Did you do this while the BP was connected to another board? There might indeed be a short somewhere or maybe the board simply uses too much power and starves the bus pirate power supply. See, if you can connect a voltage meter to the pins. The voltage should be about 3.3V. You can probably also use the board power supply instead (but do not connect the +3.3V from bus pirate in this case, and make sure the debugged chip i.e. SPI flash is not in use).
Title: Re: I have a power failure occurs.
Post by: tayken on March 02, 2015, 07:24:45 pm
If the target board is using too much current, the voltage drops. There is a check for that in the software, if the measured output voltage is below a certain limit, BP turns voltage regulators off to protect them.
Title: Re: I have a power failure occurs.
Post by: malware on March 03, 2015, 09:03:24 am
[quote author="DangerByte"]Did you do this while the BP was connected to another board? There might indeed be a short somewhere or maybe the board simply uses too much power and starves the bus pirate power supply. See, if you can connect a voltage meter to the pins. The voltage should be about 3.3V. You can probably also use the board power supply instead (but do not connect the +3.3V from bus pirate in this case, and make sure the debugged chip i.e. SPI flash is not in use).[/quote]

Hi. tayken & DangerByte

Thank you very much.

I solved the problem with your help.
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