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Hello,
I am trying to connect multiple ARM devices running the "USB virtual COM port Demo" application on a single PC using many USB ports. I am only able to connect up to 2 devices. When trying to connect more devices the virtual COM ports on PC stop working properly. Does anyone know what may be going on?
Thank you! André Moutinho
Maybe this is a USB product id issue...?
> I am trying to connect multiple ARM devices running the "USB virtual COM port Demo" application on a single PC using many USB ports. I am only able to connect up to 2 devices.
Sound like a problem of serial number on the devices. Maybe all devices have same VID/PID and same serial number, aren't they?
If more than two devices have same serial number under same VID/PID, those devices make conflict on the PC. Enumeration troubles, or even if enumerated, they don't work properly.
Unique serial number for each device is the best scenario. OR even no serial number on any device is better one. Same serial number is the worst one.
Temporarily, IgnoreHWSerialNumer registry key will work.
Ignore Hardware Serial Number www.ftdichip.com/.../index.html
Tsuneo
Hello Tsuneo. I will try this and let you know.
Thank you again! André Moutinho