Just to clarify. If the battery monitoring is enabled on the shimmer with the SET_PMUX_COMMAND and acceleration data is being collected simultaneously the resultant output should be garbage? In order to get the battery state while collecting data I need to modify the boiler plate app to multiplex the two signals.
Best, Nick On Mon, Apr 16, 2012 at 1:07 AM, mike healy <[email protected]> wrote: > Hi Nick, > > Enabling the voltage monitoring is available in > ShimmerConnect/BoilerPlate. When you got to Tools->Configure Shimmer you > will see an option that says "Enable Voltage monitoring". This will change > the "AnEx ADC0" and AnEx ADC7" channels to "VSenseReg" and "VSenseBatt" > respectively. Specifically the "SET_PMUX_COMMAND" in BoilerPlate manages > the state of this mux: > http://tinyos.cvs.sourceforge.net/viewvc/tinyos/tinyos-2.x-contrib/shimmer/apps/BoilerPlate/Shimmer.h?content-type=text%2Fplain > > The part that has not been implemented is to toggle this option quickly in > order to inter-space voltage monitoring with measuring the external ADC > channels, or any method to convert the difference between the two voltage > measurements to instantaneous current (as described in the manual). > > Mike > > > > On Sat, Apr 14, 2012 at 1:48 AM, Nicholas Hosein <[email protected]>wrote: > >> Does the boiler plate app have this implemented by chance? or does the >> shimmer connect software use something besides the boilerplate. >> >> Much Thanks, >> >> Nick >> >> >> On Fri, Apr 13, 2012 at 1:15 AM, mike healy <[email protected]> wrote: >> >>> Hi Nick, >>> >>> The battery monitoring is multiplexed with the two ADC channels exposed >>> on the external connector (i.e. ADC0 and ADC7). So you cannot sample the >>> battery voltages and these channels at the same time. But you can switch >>> between the two of them quickly if required. >>> >>> See section 2.4.4. of the Shimmer User Manual for further details. See >>> the FAQ page to see how to convert the raw ADC value you receive back to >>> battery voltage: http://www.shimmer-research.com/links/faqs#S9. >>> Remember to double the value due to the halving of the voltage before it is >>> measured (as mentioned in the referenced section in the manual). >>> >>> Mike >>> >>> On Wed, Apr 11, 2012 at 7:37 AM, Nicholas Hosein <[email protected]>wrote: >>> >>>> I noticed that the shimmer software can access the batter state on the >>>> mote. In my experience the battery monitor and data bus share the same bus >>>> so battery updates cannot be made while collecting data (I could be wrong >>>> about this though). Was there an update to the boiler plate app that allows >>>> battery monitoring (by percentage or voltage) in realtime while collecting >>>> data? >>>> >>>> Much Thanks, >>>> >>>> Nick >>>> >>>> _______________________________________________ >>>> Shimmer-users mailing list >>>> [email protected] >>>> https://lists.eecs.harvard.edu/mailman/listinfo/shimmer-users >>>> >>>> >>> >> >
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