Hand Held Products 4X00 Series User Manual

Also see for 4X00: Software guide

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Hand Held Products 4X00 Series User Manual Manual pdf 9 page image

IMAGETEAM™ 4X00 Series Hardware Interface Layer Specification 3BindPhysicalMemoryToVirtualMemoryICMediaThis function binds the physical memory of an image, specified by "hPhysical," to a virtual memory location specified by"pVirtual."Note: It is possible that multiple calls to this function may be made with the same physical pseudo-handle, but a different virtualaddress, i.e., binding multiple virtual addresses to the same physical space at the same time. This is normal.DWORD BindPhysicalMemoryToVirtualMemoryICMedia(DWORD hPhysical,void *pVirtual)Passed Arguments DescriptionDWORD hPhysical A "pseudo-handle" to a reserved physical memory slot. This was the "pseudo-handle"returned by AllocatePhysicalScanSpaceICMedia when the space was allocated.void *pVirtual A pointer to a virtual address to be bound to the physical memory referenced byhPhysical.ReturnsZero on failure, non-zero on success.CaptureInitiatedICMediaIn order to stay synchronized with the incoming images, the scan driver needs to know when each request to acquire a new imagehas been successfully completed. A request for a new capture that is made before the front edge of the Vsync signal (an optionalfunction) should be carried out on the front edge of the next Vsync signal. CaptureInitiatedICMedia is called after the front edgeof Vsync to determine if that has happened.DWORD CaptureInitiatedICMedia(void)ReturnsZero indicates that on the last front edge of Vsync a new capture request was not carried out. This will occur eitherbecause the requet was never made, or because the request was made but was unsuccessful.Non-zero indicates that a new capture request was carried out on the last front edge of Vsync.DeinitializeImageLineDataProcessingICMediaThis function is used to destroy, or undo any software or hardware configurations that are associated with the calling of the imagedata line processing.DWORD DeinitializeImageLineDataProcessingICMedia(void)ReturnsZero on failure, non-zero on success.DeinitializeVsyncProcessingICMediaThis function disables the system from responding to the Vsync pulse from the imager. This involves undoing the setupperformed via the InitializeVsyncProcessingICMedia (see page 10), function.DWORD DeinitializeVsyncProcessingICMedia(void)