Matrix user forums

Hi,

I would like to powerup my ECIO with a Ipod re-charger.
Does anyone know if this is possible and how to do it.

I've tried, but the program does not start, no matter how the jumper is set.
If I use the USB cable into my computer, the program starts and continues to run even when I take over the 5V usb power from the computer.

will it be possible to power up through the USB cable without the jumper set to EXT. ? so I can use the Ipod re-charger as power source.

Rene

Hello Rene,

When the ECIO is powered up the startup routine looks like this.

1: Power On - start LED flashing
2: Is USB connected? Yes: goto3, No goto6
3: Is the USB driver installed correctly? Yes: goto4, No: Wait here until they are installed
4: Is the PC trying to communicate with me? No: Wait 5 seconds then goto 6, Yes: goto5
5: Wait forever until told to reset or reprogram etc
6: Start users program - Stop LED flashing

What is happening is that the bootloader is seeing the USB cable and it is waiting until it is told by the USB host that the drivers have been installed correctly. Removing resistor R4 would permanently help to get around this problem but you would have to replace it each time you need to reprogram the ECIO. A better way may be to hack apart the USB cable you are using and wire it in so that the +V and GND signals from the cable are connected to the external supply pins of the ECIO.

Benj,

Okay .. I get it.
actually quite simple ...
Thanks for the instructions ....


Rene