HP (Hewlett-Packard) 9112 Series ユーザーズマニュアル

 

u  Argument : 

Bytes to allocate. Please be careful, the unit of this 

argument is BYTE, not SAMPLE. 
memID: 

If the memory allocation is successful, driver returns the ID 

of that memory in this argument. Use this memory ID in 
W_9112_AD_DMA_Start

 or W_9112_ContDmaStart function call. 

The linear address of the allocated DMA memory. You can 

use this linear address as a pointer in C/C++ to access the DMA data. 

u  Return Code : 

ERR_NoError 
ERR_AllocDMAMemFailed 

5.30  _9112_Free_DMA_Mem 

u  Description 

Deallocate a system DMA memory under Windows 95 environment. This 
function is only available in Windows 95 version. 

u  Syntax 

Visual C++(Windows-95) 

int W_9112_Free_DMA_Mem (HANDLE memID) 
 

Visual Basic (Windows-95) 

W_9112_Free_DMA_Mem (ByVal memID As Long) As Long 

u  Argument : 

The memory ID of the system DMA memory to deallocate. 

u  Return Code : 

ERR_NoError 

5.32  _9112_Get_Sample 

u  Description 

For the language without pointer support such as Visual Basic, 
programmer can use this function to access the index-th data in DMA 
buffer.  This function is only available in Windows 95 version. 

u  Syntax 

Visual C++(Windows-95) 

int W_9112_Get_Sample (unsigned long linearAddr, unsigned index, 

unsigned short *ai_data) 
 

Visual Basic (Windows-95) 

W_9112_Get_Sample (ByVal linearAddr As Long, ByVal idx As Long, 
ai_data As Integer) As Long