Windows USB example

[purnima]

I am new member to this forum. So this information is useful for me. I will try this.

[caodungviet]

sorry but i don't understand about The "Device Class GUID", please you help me?? for example,
#define HID_CLASSGUID {0x6bdd1fc6, 0x810f, 0x11d0,{ 0x08, 0x00, 0x2b, 0xe2, 0x09, 0x2f }}
so :{ 0x08, 0x00, 0x2b, 0xe2, 0x09, 0x2f }.what is it??
please explain for me,i don't understand about it. what it means?? sorry ,because my english is not good

[squidge]

They are device class GUIDs used in device detection and classification. See the Windows DDK for more information and other GUIDs.

[kuzulis]

Hi all.
And why different descriptors for reading and writing device?
(You can also open once a one descriptor for reading and writing!)

[squidge]

Hi all.
And why different descriptors for reading and writing device?
(You can also open once a one descriptor for reading and writing!)

You can but that will not work across all devices. Some devices for example are read-only, so if you try to open them as read/write the call will fail, but if you have seperate read and write only the write will fail, so you know the device is read-only and don't need to do additional work (such as reopening as read only and setting a read-only flag). Typically however you will know this before writing code but as an example it is impossible to know this in advance.

[kuzulis]

aah, I understand, thank you.

[caodungviet]

i can conect with USB, but when i open it ,so my computer is broke dow,, why such that??

[squidge]

Please rephrase. Don't understand.

[caodungviet]

sorry, because my english is not good..i can connect this project with USB,but when i open this project ,my computer can't run.
please help me!!

[wysota]

You mean it reboots?

[caodungviet]

sorry but i can't understand how you can search HID_CLASSGUID {0x6bdd1fc6, 0x810f, 0x11d0,{ 0x08, 0x00, 0x2b, 0xe2, 0x09, 0x2f }},.everytime i have searched and i allway search "{a5dcbf10-6530-11d2-901f-00c04fb951ed}" with the another USB.
please help me!! thanks
Please give me the directions by images!!

[squidge]

I don't understand your question. This example is made for HID devices, a5dcbf10-6530-11d2-901f-00c04fb951ed is USB raw device ?

[arunpk]

i am trying to develop qt application using USB to control relay board..... I was trying this windows USB Example...
always getting an error message " :: error: No rule to make target `../../qt/2010.05/qt/mkspecs/win32-g++/qmake.conf', needed by `makefile'. Stop." Can anyone please give suggestion how to recover from this error.........Is there any sample application available using USB in windows.....

[arunpk]

please reply to my post......can any one help me to overcome this problem.....

[arunpk]

Please help me regarding this !!!!!!!!!!!!!... i have entered correct VID & PID for the device but this application is not showing the device connected......
i tried to connect USB relay board which uses Microchip Pic 18 series.... I want to control those relays through USB......

[wysota]

Are you sure your device is compliant with this example?

[TapsaA]

Thanks for great example. With Qt 5 you should use code like:

To header:
bool nativeEvent(const QByteArray & eventType, void * message, long *result);

And to CPP:
bool USBexample::nativeEvent(const QByteArray & eventType, void * message, long *result)
{
MSG* msg = reinterpret_cast<MSG*>(message);
...
}

[fazel459]

Hi
How i can get product name of HID device?
Thanks