Kontron KTT20-pITX Bedienungsanleitung PDF herunterladen (Seite 54)

KTD-S0045-D Page 50 Windows® Embedded Compact 7 (WEC7) BSP

KTT20/pITX Software Guide

Defines PORT_C as input and reads each pin:

#include <windows.h>

#include <winioctl.h>

#include <tchar.h>

// define IO controls

#define IOCTL_GPIO_GET_INPUT \

CTL_CODE (FILE_DEVICE_USERDRIVER, 3302, METHOD_BUFFERED, FILE_ANY_ACCESS)

#define IOCTL_GPIO_CONFIG_INPUT \

CTL_CODE (FILE_DEVICE_USERDRIVER, 3304, METHOD_BUFFERED, FILE_ANY_ACCESS)

// define ports

#define GPIO_PORT_A 0

#define GPIO_PORT_B 1

#define GPIO_PORT_C 2

#define GPIO_PORT_D 3

#define GPIO_PORT_E 4

#define GPIO_PORT_F 5

// index conversion macros

#define GET_INDEX(port, pin) ((port << 3) | (0x07 & pin))

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

{

HANDLE hDev;

UINT i;

UCHAR ucBuffIn, ucBuffOut, val = 0;

// Create handle

hDev = CreateFile (L"PIO1:", GENERIC_READ | GENERIC_WRITE, 0, NULL, OPEN_EXISTING, 0, NULL);

if (hDev != INVALID_HANDLE_VALUE)

{

for (i = 7; i >= 0; i--)

{

ucBuffIn = GET_INDEX (GPIO_PORT_C, i);

if (! DeviceIoControl (hDev, IOCTL_GPIO_CONFIG_INPUT,

&ucBuffIn, sizeof (UCHAR), &ucBuffOut, sizeof (UCHAR),

NULL, NULL))

wprintf (TEXT ("Error: DeviceIoControl_CONFIG_INPUT failed\r\n"));

if (! DeviceIoControl (hDev, IOCTL_GPIO_GET_INPUT,

&ucBuffIn, sizeof (UCHAR), &ucBuffOut, sizeof (UCHAR),

NULL, NULL))

wprintf (TEXT ("Error: DeviceIoControl_GET_INPUT failed\r\n"));

val |= (ucBuffOut & 0x01);

if (i > 0)

val <<= 1;

}

wprintf (TEXT ("Input value = 0x%02X\r\n"), val);

Sleep (2000);

}

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