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Two instances of the same hardware
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Two instances of the same hardware

seattleuser posted on 27 Mar 2012 3:47 PM PST
Member
4 Forum Posts

 Hi, if two identical FX2-based devices are plugged into the PC, how can I discern one from the other? I do not have the ability to do this in the EEPROM. But as I look through the USB Properties in Device Manager, I see Address is set differently for each device (right click on USB device, go to details, then property = address)

However, this doesn't seem to coincide with the value I get when I look at the device property USBAddress 

Can someone shed some light on this? What is the best way to communicate with two identical devices connected to the same PC? 

 

Thanks




Re: Two instances of the same hardware

PRJI posted on 28 Mar 2012 07:54 AM PST
Cypress Employee
333 Forum Posts

 

Hi, 

     Can you tell us more about your project implementation so that we can help you out. Why cant you use different PIDs?

Thanks

Prajith



Re: Two instances of the same hardware

seattleuser posted on 28 Mar 2012 09:02 AM PST
Member
4 Forum Posts

 The device is a USB voltmeter. The user might want to have one connected, or 4 connected. It doesn't make sense ot have different PID for each.



Re: Two instances of the same hardware

aasi posted on 29 Mar 2012 07:36 AM PST
Cypress Employee
1090 Forum Posts

You can add serial number string descriptor. Use the serial number to identify the device you're interacting with.

Regards,

Anand






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