Re: [Gumstix-users] Robostix keeps restarting

[Matthew S. <ma...@ec...>]

Eric M wrote:
> Hi guys,
> 
> Just a quick questions: my robostix board seems to keep restarting 
> itself whenever I've got it plugged into a battery pack.  I have the I2C 
> bootloader on it, loaded with a simple LED flasher program.
> 
> The problem does not affect the board when it is plugged into an outlet 
> though.  Now this could be a simple battery power issue, but the 
> confusing part is the battery has enough power to run a wifi card I have 
> plugged into the CFstix expansion.  The robostix shouldn't draw that 
> much power, should it?  Also, it's just the robostix that restarts, the 
> Gumstix stays fine...it's a conundrum...
> 
> Thanks,
> 
> Eric
Check as the gumstix runs at 3.3V (as might your wifi card) while the 
robostix runs at 5v so the robostix may have built in supply health checks 
(brownout detection) which is resetting it as you are on the edge of its 
operating range.

(at least that is what I would examine if I was using Microchip PIC 
microcontrollers)

M

-- 
Matthew Swabey
Rm7025, Bldg21 Faraday Tower
Department of ECS
University of Southampton
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