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/*******************************************************
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;
}
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