/*******************************************************

Windows HID simplification

Alan Ott

Signal 11 Software

8/22/2009

Copyright 2009

This contents of this file may be used by anyone

for any reason without any conditions and may be

used as a starting point for your own applications

which use HIDAPI.

********************************************************/

#include <stdio.h>

#include <wchar.h>

#include <string.h>

#include <stdlib.h>

#include "hidapi.h"

// Headers needed for sleeping.

#ifdef _WIN32

#include <windows.h>

#else

#include <unistd.h>

#endif

int main(int argc, char* argv[])

{

int res;

unsigned char buf[256];

#define MAX_STR 255

wchar_t wstr[MAX_STR];

hid_device *handle;

int i;

#ifdef WIN32

UNREFERENCED_PARAMETER(argc);

UNREFERENCED_PARAMETER(argv);

#endif

struct hid_device_info *devs, *cur_dev;

if (hid_init())

return -1;

devs = hid_enumerate(0x0, 0x0);

cur_dev = devs;

while (cur_dev) {

printf("Device Found\n type: %04hx %04hx\n path: %s\n serial_number: %ls", cur_dev->vendor_id, cur_dev->product_id, cur_dev->path, cur_dev->serial_number);

printf("\n");

printf(" Manufacturer: %ls\n", cur_dev->manufacturer_string);

printf(" Product: %ls\n", cur_dev->product_string);

printf(" Release: %hx\n", cur_dev->release_number);

printf(" Interface: %d\n", cur_dev->interface_number);

printf("\n");

cur_dev = cur_dev->next;

}

hid_free_enumeration(devs);

// Set up the command buffer.

memset(buf,0x00,sizeof(buf));

buf[0] = 0x01;

buf[1] = 0x81;

// Open the device using the VID, PID,

// and optionally the Serial number.

////handle = hid_open(0x4d8, 0x3f, L"12345");

handle = hid_open(0x4d8, 0x3f, NULL);

if (!handle) {

printf("unable to open device\n");

return 1;

}

// Read the Manufacturer String

wstr[0] = 0x0000;

res = hid_get_manufacturer_string(handle, wstr, MAX_STR);

if (res < 0)

printf("Unable to read manufacturer string\n");

printf("Manufacturer String: %ls\n", wstr);

// Read the Product String

wstr[0] = 0x0000;

res = hid_get_product_string(handle, wstr, MAX_STR);

if (res < 0)

printf("Unable to read product string\n");

printf("Product String: %ls\n", wstr);

// Read the Serial Number String

wstr[0] = 0x0000;

res = hid_get_serial_number_string(handle, wstr, MAX_STR);

if (res < 0)

printf("Unable to read serial number string\n");

printf("Serial Number String: (%d) %ls", wstr[0], wstr);

printf("\n");

// Read Indexed String 1

wstr[0] = 0x0000;

res = hid_get_indexed_string(handle, 1, wstr, MAX_STR);

if (res < 0)

printf("Unable to read indexed string 1\n");

printf("Indexed String 1: %ls\n", wstr);

// Set the hid_read() function to be non-blocking.

hid_set_nonblocking(handle, 1);

// Try to read from the device. There shoud be no

// data here, but execution should not block.

res = hid_read(handle, buf, 17);

// Send a Feature Report to the device

buf[0] = 0x2;

buf[1] = 0xa0;

buf[2] = 0x0a;

buf[3] = 0x00;

buf[4] = 0x00;

res = hid_send_feature_report(handle, buf, 17);

if (res < 0) {

printf("Unable to send a feature report.\n");

}

memset(buf,0,sizeof(buf));

// Read a Feature Report from the device

buf[0] = 0x2;

res = hid_get_feature_report(handle, buf, sizeof(buf));

if (res < 0) {

printf("Unable to get a feature report.\n");

printf("%ls", hid_error(handle));

}

else {

// Print out the returned buffer.

printf("Feature Report\n ");

for (i = 0; i < res; i++)

printf("%02hhx ", buf[i]);

printf("\n");

}

memset(buf,0,sizeof(buf));

// Toggle LED (cmd 0x80). The first byte is the report number (0x1).

buf[0] = 0x1;

buf[1] = 0x80;

res = hid_write(handle, buf, 17);

if (res < 0) {

printf("Unable to write()\n");

printf("Error: %ls\n", hid_error(handle));

}

// Request state (cmd 0x81). The first byte is the report number (0x1).

buf[0] = 0x1;

buf[1] = 0x81;

hid_write(handle, buf, 17);

if (res < 0)

printf("Unable to write() (2)\n");

// Read requested state. hid_read() has been set to be

// non-blocking by the call to hid_set_nonblocking() above.

// This loop demonstrates the non-blocking nature of hid_read().

res = 0;

while (res == 0) {

res = hid_read(handle, buf, sizeof(buf));

if (res == 0)

printf("waiting...\n");

if (res < 0)

printf("Unable to read()\n");

#ifdef WIN32

Sleep(500);

#else

usleep(500*1000);

#endif

}

printf("Data read:\n ");

// Print out the returned buffer.

for (i = 0; i < res; i++)

printf("%02hhx ", buf[i]);

printf("\n");

hid_close(handle);

/* Free static HIDAPI objects. */

hid_exit();

#ifdef WIN32

system("pause");

#endif

return 0;

}