David Vescovi's blog

From the monthly archives: September 2014

We are pleased to present below all posts archived in 'September 2014'. If you still can't find what you are looking for, try using the search box.

Power management on the Beaglebone part 2–Battery

In part one of this series I showed how to implement the “Power Key” to safely power up and shutdown the Beaglebone platform under Windows Embedded Compact 2013 or Windows Compact 7. To continue on the power management theme I will show how to implement the battery driver but first there are some hardware issues we need to take care of. It seems the hardware designers of the Beaglebone were thinking ahead in that they brought out all the needed connections to the PMIC (Power Management Integrated Circuit) for battery backed operation. The needed connections are shown as test points in this partial schematic: The full schematic is freely available from the BeagleBoard web site. The data sheet for the Texas Instruments PMIC is also available for download. As I have stated in my previous post, the TPS65217C PMIC has an integrated battery charger on board. In my case I am using a 1.75A/hr. Lithium-Ion (Li-ion) battery. A couple of the connections are quite obvious, Battery plus needs to go to TP5, Batt ...

Read the rest of entry »

Power managment on the Beaglebone AM335x platform part 1

One thing I see often on poorly designed embedded systems is lack of a robust system wide power supply design. Quite often little thought is put in before hand on requirements for proper power sequencing. This is the fault of the system engineer who should understand all the issues but whom usually ends up pointing the finger for a faulty system at the hardware or software designer. And while the hardware issues can be obvious, things like out of spec regulators or switching power supplies that don't switch etc. some of the software issues can be much more subtle harder to detect. One that I have seen quite often is absolutely no regard for properly shutting down the system. Many times there is an off switch which kills all power but without ever informing the processor or OS ahead of time. Another design may force a reset on the processor and then power is cut. While the second example may be argued as preferred, both are examples of poor design.You may think that forcing a re ...

Read the rest of entry »


Search blog


Recent Comments

  1. Re: Windows Embedded Compact 2013 on Beaglebone gets IoT sample

    Please contact me regarding a full installation of this BSP for WINCE2013, and what is necessary for...

    -- Aaron Peterson

  2. Re: BeagleBone BSP code clean up

    Hi David, Interest in the fully version of the image. Please let me know the commercials. I need clarification...

    -- CB

  3. Re: BeagleBone BSP gets several improvements

    Hi David, How can I get a full version (without reboot) of your image available for demonstration?

    -- Marco Aurélio Braun

  4. Re: Low power operation on the community IoT Beaglebone BSP (Part 1)

    Hello , dvescovi . Because of Job , I use your Beaglebone black BSP which is helpful for me . I want...

    -- KevinHsu

  5. Re: Yet Another Gotcha: Compact 7 Update

    Hi David, Would you please contact me regarding the wince7 BSP for the BBB? I have a few LCD Capes...

    -- trialsrideraz

  6. Re: Yet Another Gotcha: Compact 7 Update

    Seems MS may have posed a new updated ISO on MSDN. For those without a subscription, you are still out...

    -- dvescovi

  7. Re: Power management on the Beaglebone part 2–Battery

    Hi David, First of all thanks for this, blog it's been very useful. Before I go ahead and solder anything...

    -- Juanes1220

  8. Re: More improvements for Beaglebone BSP

    Thank you for the fixes. The latest version builds under WEC7! Yay! Next .. have to try deploying it...

    -- OzFlipper

  9. Re: Windows Embedded Compact 2013 on Beaglebone gets IoT sample

    Of course, I meant the WEC2013 SDK ... see what happens when you work with too many bits at the same...

    -- OzFlipper

  10. Re: Windows Embedded Compact 2013 on Beaglebone gets IoT sample

    Hi David. First, thank you for what must have been a huge amount of work. I have been trying to install...

    -- OzFlipper

Turkish porno izle video site in rokettubeporno izle