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I am using USB to communicate between Lab View and micro controller(c8051F320) I got an example code from USB xpress.I have a DLL also i.e 'SiUSBXp.dll' .I had no problem to identify the device, open, close,reset it but i have problems in write and read operation. It gives an error SI_SYSTEM_ERROR_CODE so if any can guide me it would be great.
Regards
sow
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