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Topic: USB ????? (Read 384 times) previous topic - next topic

ambuj

Hi all,
       this days i m working with MEGA ADK kit. in this kit i have USB host port which connected with MAX3421e .... so i have some queries
1. I have to plug external power supply for USB communication?????????
2. how could i can see the USB data or can say USB OUTPUT. i think there must be tool for USB simulation.

dxw00d

1. It's probably a good idea, unless you know what you have attached to the usb host port won't try and draw power. If you attach a phone, for example, it will try and draw current to charge. If you attach a camera, it probably won't.

2. Haven't we been through this? I couldn't find a usb simulator, when I looked last time. I did find a usb loopback box though, which I posted last time.

ambuj

thanks
what i have to for this error...
OSCOKIRQ failed to assert
This is the error of frequency ...... so could u tell me what i have to do for this

http://developer.android.com/guide/topics/usb/adk.html

i think this problem has reasons
1. PPL function is not working......so what i have to for this

dxw00d

Try Googling. There seem to be a lot of others having the same problem.

http://arduino.cc/forum/index.php?topic=68205.0

http://www.circuitsathome.com/mcu/google-open-accessory-interface-for-usb-host-shield-library-2-0-released

http://lmgtfy.com/?q=Mega+adk+OSCOKIRQ+failed+to+assert

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