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Problem using VCP driver 1.1

juno
Associate
Posted on April 23, 2009 at 05:28

Problem using VCP driver 1.1

1 REPLY 1
juno
Associate
Posted on May 17, 2011 at 13:10

Hi.

I got a project using your STM32F103RET6.

I connected it to my PC via USB connector and installed your VCP driver

whose name is VCPDriver_V1.1_Setup.exe downloaded from your web site.

Everything is fine to communicate each other.

However one thing I got disappointment is the one of event,I guess, doesn't poped up from your device driver, which is ERROR_ACCESS_DENIED

from WaitCommEvent() when the cable is hooked out from my PC.

I need to that error number when the device driver is in reset

situation to process graceful exceptional routine.

My program routine has been aleady verified by other VCP manufacturers

such as FTDI and Silicon. Both company's VCP is works well but not yours

so far.

Do I miss something to get that error number from WaitCommEvent() ?

I have to decide whether your VCP is quite working well so that I could

using it on my product.

By that reason I'd like to response from you ASAP.

Thanks