Kontron KTT20-pITX - Manual (Page 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
#include
#include
// 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);
}
}