StackOverflow2013

Note that there are some explanatory texts on larger screens.

plurals

POUSB communications - Windows CE host terminal to usb device (printer)
primarykey
Id
17842420
data
AcceptedAnswerId
0
AnswerCount
1
ClosedDate
CommentCount
0
CommunityOwnedDate
CreationDate
2013-07-24T18:48:55.793
FavoriteCount
1
LastActivityDate
2013-07-25T14:38:09.597
LastEditDate
LastEditorUserId
0
OwnerUserId
2600334
ParentId
0
PostTypeId
1
Score
1
ViewCount
596
LastEditorDisplayName
text
Body
I am developing some code to run from a Windows CE5 terminal that will send data to a usb device (a printer in this case). I am having issues obtaining the value of the port used to open communications. I have tried to use the device path written in the registry by the driver (USBport + GUID) and many other variations to no prevail. I understand that communicating to the device should just "open a file" to communicate w/ the device at a given memory address. I understand there are modern usb libraries, but those will be of no use on such an old OS (i assume). My overall goal is to write the code is VC++ and use JNI to wrap the code for use in a Java application (SE6). Can anybody give an example on what a sample "device path" might be? Or if there is anything else I am missing feel free to shed light. I have noticed most of the modern USB libraries have a search function, but if I have the device path I don't believe the search function would be necessary.... Currently I am trying to get the code to work on any OS, and have been using Windows 7 just to get things working. Below are some code snippets: const LPCTSTR portvalue = L"441ee000-4342-11d5-a184-00c04f60524d"; // defines the portname, ie, location of device to read/write int usbHandle = OpenUsb(portvalue); //opens the file/device for communication /********Here is the OpenUsb function *************/ __declspec(dllexport) int _cdecl OpenUsb(const LPCTSTR portName) { <pre><code>HANDLE activeUsbFileHandle = CreateFile(portName, //portname built in registry? need to get a WinCE5 vm going..? i belive so GENERIC_READ|GENERIC_WRITE, FILE_SHARE_READ|FILE_SHARE_WRITE, // comm devices must be opened w/exclusive-access NULL, // no security attributes OPEN_EXISTING, // comm devices must use OPEN_EXISTING FILE_ATTRIBUTE_NORMAL, NULL); cout << "Portname Mem Location: " << &portName; cout << "\nThe portname passed in as: " << portName << endl; commTimeouts.ReadIntervalTimeout = 0; commTimeouts.ReadTotalTimeoutConstant = 500; commTimeouts.ReadTotalTimeoutMultiplier = 0; commTimeouts.WriteTotalTimeoutConstant = 5000; commTimeouts.WriteTotalTimeoutMultiplier = 0; SetCommTimeouts(activeUsbFileHandle, &commTimeouts); return (int)activeUsbFileHandle; </code></pre> }
Tags
<windows><usb><windows-ce>
Title
USB communications - Windows CE host terminal to usb device (printer)
singulars
PostAcceptedAnswerId
1. This table or related slice is empty.
PostParentId
1. This table or related slice is empty.
PostTypePostTypeId
1. PTQuestion
UserLastEditorUserId
1. This table or related slice is empty.
UserOwnerUserId
1. USN3rdB0mber
plurals
PostLinksPostIdRelatedPostId
1. This table or related slice is empty.
PostLinksRelatedPostIdPostId
1. This table or related slice is empty.
PostsAcceptedAnswerId
1. This table or related slice is empty.
PostsParentIdCreationDate
1. PO
 singulars
 PostTypePostTypeId
 PTAnswer
VotesPostIdCreationDate
1. This table or related slice is empty.
CommentsPostId
1. This table or related slice is empty.

Querying!

Guidance

A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.