Objective Development Forums 2014-02-03T19:43:00+02:00 https://forums.obdev.at/app.php/feed/topic/8833 2014-02-03T19:43:00+02:00 2014-02-03T19:43:00+02:00 https://forums.obdev.at/viewtopic.php?t=8833&p=26549#p26549 <![CDATA[Re: Vusb Mame Panel is not working - Unknown Device error]]>
Also remember Unknown Device, is not an error, its a general issue. So you have to hunt down the problem and fix it, no one can guess it for you.

Statistics: Posted by ulao — Mon Feb 03, 2014 7:43 pm

]]> 2014-02-01T16:27:25+02:00 2014-02-01T16:27:25+02:00 https://forums.obdev.at/viewtopic.php?t=8833&p=26536#p26536 <![CDATA[Vusb Mame Panel is not working - Unknown Device error]]> http://vusb.wikidot.com/project:mamepanel). I made and uploaded the hex code.

When I connect it to pc form usb, computer find it as “Unknown Device”.
Image Image
I’m not good at electronics. All I wanted to do is to create my mame panel. To find my mistake and it’s solution, I want to tell eveything I make.

When I found v-usb mame panel web page, I felt lucky. I downladed the circuit and sources. I bought this equipments with looking the bom list.

This is the BOM list
Part====Value==========Device===========Package======Library

C1,C2==22p===========C2.5/2===========C2.5/2=======Capacitor-wima
C3,C6==100n==========C5/C2.5===========C5/C2.5=====Capacitor-wima
C4,C5==4u7===========CPOL-EUE2.5-6====E2,5-6 ======Resistor
D1=====1N4148DO35-7==1N4148DO35-7====DO35-7=====diode
IC1====MEGA32-P======MEGA32-P=======DIL40======atmel
IC2====LD117ADT33TR==LD117ADT33TR====DPACK====V-REG
Q1====12.000HZ======CRYSTALHC18U-V==HC18U-V====crystal
R1====4k7============R-EU_0207/7=======0207/7=====resistor
R2,R3==68============R-EU_0207/7=======0207/7=====resistor
R4=====1k5==========R-EU_0207/7========0207/7=====resistor
R5=====1M==========R-EU_0207/7========0207/7=====resistor

This is what I bought

Part====Value==========Device===========What I Bought

C1,C2==22p===========C2.5/2===========22pF ceramic Capacitors
C3,C6==100n==========C5/C2.5===========100nF 63V Polyester Capacitors
C4,C5==4u7===========CPOL-EUE2.5-6====4.7uF 25 V Electrolytic Capacitor
D1=====1N4148DO35-7==1N4148DO35-7====1 N 4148
IC1====MEGA32-P======MEGA32-P=======ATMEGA32A PU**
IC2====LD117ADT33TR==LD117ADT33TR====LM 1117T - 3,3
Q1====12.000HZ======CRYSTALHC18U-V==12 MHz Crystal
R1====4k7============R-EU_0207/7=======4,7 Kohm 1/8 W Resistor
R2,R3==68============R-EU_0207/7=======68 ohm 1/8 W Resistor
R4=====1k5==========R-EU_0207/7========1,5 kohm 1/8 W Resistor
R5=====1M==========R-EU_0207/7========1 Mohm 1/4W Resistor

** I couldn’t find Atmega32. I bought Atmega32A. I found a document “Migrating from ATmega32 to ATmega32A” (http://www.atmel.com/Images/doc8162.pdf) . I found ATmega 32 datasheet (http://www.atmel.com/Images/doc2503.pdf) and ATmega32A datasheet (http://www.atmel.com/Images/Atmel-8155- ... asheet.pdf) But My experience is not enough to understand it

I watched pcb tutorials, made my pcb and upload it’s orginal hex file. I didn’t change any thing on source. I directly used it’s orginal hex file. When I connect it to pc form usb, computer find it as “Unknown Device”.

I found a troubleshooting document about "Device Not Recognized Errors" (http://vusb.wikidot.com/troubleshooting). But My experience is not enough to understand it, again.

I need your help. What can be the problem?

1- Are the equipments that I used correct parts?
2- Is the problem about Atmega32A?
a- Do I have to change something on cicuit?
b- Do I have to change something in the source code?
3- Is the problem coming from another place?

Statistics: Posted by easgard — Sat Feb 01, 2014 4:27 pm

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