Moxa Technologies V460 Series Manual de usuario descargar pdf (Pagina 19)

V460 Series WinXP Embedded User’s Manual Getting Started

2-9

Reading Data from SRAM

// Persisted_SRAM_Read.cpp : Defines the entry point for the console application.

#include "stdafx.h"

#include <windows.h>

int _tmain(int argc, _TCHAR* argv[])

{

DWORD dwBackSize = 0;

HANDLE hSRAM = NULL;

// open the SRAM device driver

hSRAM = CreateFile(L"\\\\.\\Sram", GENERIC_READ | GENERIC_WRITE,

0, // exclusive access, until the handle is closed

NULL, // no security

OPEN_EXISTING,

FILE_ATTRIBUTE_NORMAL, // no overlapped I/O

NULL); // null template

if (hSRAM == INVALID_HANDLE_VALUE)

{

printf("Can't open SRAM\n");

return 1;

}

char recvBuf[100];

memset( recvBuf, 0, sizeof(recvBuf));

// read data from SRAM

ReadFile( hSRAM, recvBuf, sizeof(recvBuf), &dwBackSize, NULL);

printf("read from SRAM: %s\n", recvBuf);

// close device driver handle

CloseHandle(hSRAM);

return 0;

}

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Moxa Technologies V460 Series Manual de usuario Pagina 19