5.13 _7200_Alloc_DMA_Mem

@ Description

Contact Windows 95/98 system to allocate a block of contiguous memory for single-buffered DMA transfer. This function is only available in Windows 95/98.

@ Syntax

Visual C++ (Windows 95)

int W_7200_Alloc_DMA_Mem (U32 *buff, U32 *handle, U32 buf_size, U32 *actual_size)

Visual Basic (Windows 95)

W_7200_Alloc_DMA_Mem (buff As Long, handle As Long, ByVal buf_size As Long, actual_size As Long ) As Long

@ Argument

buff: The start address of the user buffer for DMA data transfer. This buffer will be attached to the DMA memory allocated by this function. When using this DMA memory handle as an argument of the W_7200_DI_DMA_Start function, DI data will be copied to this buffer. When using this DMA memory handle as an argument of the W_7200_DO_DMA_Start function, the data stored in this buffer will be the DO data.

handle: The handle of system DMA memory returned from system. Use this handle in _7200_DI_DMA_Start or _7200_DO_DMA_Start.

buf_size: Bytes to allocate. Please be careful, the unit of this parameter is BYTE, not SAMPLE.

actual_size: The actual size system allocate for DMA memory. The unit is BYTE. If system is not able to get a block of contiguous memory of specified buf_size, it will allocate a block of memory as large as it can. In this case, this function returns ERR_SmallerDMAMemAllocated, and actual_size denotes the actual size of allocated memory.

@ Return Code

ERR_NoError

ERR_SmallerDMAMemAllocated

C/C++ Libraries • 45

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Intel LPCI-7200S manual 13 7200AllocDMAMem
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LPCI-7200S specifications

The Intel LPCI-7200S is a powerful and versatile communication controller that stands out in the field of embedded computing solutions. This product is designed to cater to a wide range of applications including industrial automation, telecommunications, and transportation systems. Its robust architecture, combined with advanced features and technologies, makes it an attractive option for developers and system integrators looking for reliable performance in mission-critical environments.

One of the main features of the LPCI-7200S is its enhanced processing capability. The controller is built around Intel’s latest processor technology, enabling high-speed data handling and improved overall system response. This makes the LPCI-7200S suitable for applications that require real-time data processing and quick decision-making based on incoming information.

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In summary, the Intel LPCI-7200S is a cutting-edge communication controller that offers a blend of processing power, versatile connectivity, industrial protocol support, energy efficiency, ruggedness, and security. These characteristics make it an invaluable asset for a wide array of applications across various industries.
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