www.pudn.com > pcmcia_sample.rar > Test_pcmcia.cpp

// Test_pcmcia.cpp 
// 
// Generated by DriverWizard version DriverStudio 2.7.0 (Build 562) 
// 
// This console application demonstrates how to open a handle 
// to a device in your driver, and communicate with the driver 
// using Read, Write, and DeviceIoControl calls, as appropriate. 
// 
// This test program attempts to open the device using the 
// GUID defined in "..\PcmciaDeviceinterface.h" 
 
#include  
#include  
#include  
 
 
#include "..\PcmciaDeviceinterface.h"	// Has class GUID definition 
 
// This function is found in module OpenByIntf.cpp 
HANDLE OpenByInterface(GUID* pClassGuid, DWORD instance, PDWORD pError); 
 
typedef void VOIDFUNC(); 
 
// Prototypes 
void Usage(void); 
 
void CloseIfOpen(void); 
void doRead(int i); 
void doWrite(int i); 
 
// Global data 
 
 
 
// Handle to device opened in driver. 
// 
HANDLE	hDevice = INVALID_HANDLE_VALUE; 
 
// Class GUID used to open device 
// 
GUID ClassGuid = PcmciaDevice_CLASS_GUID; 
 
 
//////////////////////////////////////////////////////////////////////// 
// Exit 
// 
//		Print a message and exit 
// 
   void Exit(int res) 
{ 
	printf("Exiting...\n\n"); 
	CloseIfOpen(); 
	exit(res); 
} 
 
 
//////////////////////////////////////////////////////////////////////// 
// Main entry point 
// 
// 
int __cdecl main(int argc, char *argv[]) 
{ 
	int		nArgIndex;				// Walk through command line arguments 
	int		nArgIncrement = 0; 
	int		val; 
	DWORD	Error; 
 
	printf("Test application Test_pcmcia starting...\n"); 
 
	hDevice = OpenByInterface( &ClassGuid, 0, &Error); 
	if (hDevice == INVALID_HANDLE_VALUE) 
	{ 
		printf("ERROR opening device: (%0x) returned from CreateFile\n", GetLastError()); 
		Exit(1); 
	} 
	else 
	{ 
		printf("Device found, handle open.\n"); 
	} 
 
	// Parse the command line 
 
	if (argc < 2) Usage(); 
 
	nArgIndex = 1; 
	while (nArgIndex < argc) 
	{ 
		// Parse ahead to determine numeric value of argument 
 
		if (nArgIndex+1 >= argc) Usage(); 
		if (!isdigit(argv[nArgIndex+1][0])) Usage(); 
		val = atoi(argv[nArgIndex+1]); 
 
		switch (argv[nArgIndex][0]) 
		{ 
 
			case 'r': 
			case 'R': 
				doRead(val); 
				nArgIncrement = 2; 
				break; 
 
			case 'w': 
			case 'W': 
				doWrite(val); 
				nArgIncrement = 2; 
				break; 
 
			case 'i': 
			case 'I': 
			   printf("No IO Control Codes defined\n"); 
			   Exit(1); 
 
			case '?': 
			case 'h': 
			default: 
				Usage(); 
		} 
		nArgIndex += nArgIncrement; 
	} 
 
	return 0; 
} 
 
 
//////////////////////////////////////////////////////////////////////// 
// CloseIfOpen 
// 
//		Close the device if we previously opened a handle to it. 
// 
void CloseIfOpen(void) 
{ 
	if (hDevice != INVALID_HANDLE_VALUE) 
	{ 
		// Close the handle to the driver 
		if (!CloseHandle(hDevice)) 
		{ 
			printf("ERROR: CloseHandle returns %0x.\n", GetLastError()); 
		} 
		hDevice = INVALID_HANDLE_VALUE; 
	} 
} 
 
 
//////////////////////////////////////////////////////////////////////// 
// doRead 
// 
//		Read 'n' bytes of data from the device 
// 
// Note: This simple test app reads data from the device and displays the 
//			data as characters.  This behavior can be modified as appropriate 
//			for your device. 
// 
void doRead(int n) 
{ 
	char	*buf; 
	ULONG	nRead; 
	int		i; 
	int		j; 
 
	buf = (char *) malloc(n); 
	if (buf == NULL) 
	{ 
		printf("Failed to allocate buffer for read"); 
		Exit(1); 
	} 
 
	// Read data from driver 
	printf("Reading from device - "); 
	ReadFile(hDevice, buf, n, &nRead, NULL); 
	printf("%d bytes read from device (%d requested).\n", nRead, n); 
 
	// Print what was read 
	i = 0; 
	while(i < n) 
	{ 
		j = min((i+26),n); 
		for(; i < j; i++) 
		{ 
			printf("%c, ", buf[i]); 
		} 
		printf("\n"); 
	} 
 
	free(buf); 
} 
 
 
//////////////////////////////////////////////////////////////////////// 
// doWrite 
// 
//		Write 'n' bytes of data to the device 
// 
// Note: This simple test app writes sequential characters to the 
// 			device.  This behavior can be modified as appropriate 
//			for your device. 
// 
void doWrite(int n) 
{ 
	char	*buf; 
	ULONG	nWritten; 
	int		i; 
	int		j; 
 
	buf = (char *) malloc(n); 
	if (buf == NULL) 
	{ 
		printf("Failed to allocate buffer for write"); 
		Exit(1); 
	} 
 
	// start with the mod26 letter of the number of bytes to write 
	j = (n % 26); 
	// load buffer with dummy data (abcdefg...) 
	for (i=0; i