-
Notifications
You must be signed in to change notification settings - Fork 1
/
hidapi.c
4475 lines (3741 loc) · 116 KB
/
hidapi.c
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
#ifdef _WIN32
/*******************************************************
HIDAPI - Multi-Platform library for
communication with HID devices.
Alan Ott
Signal 11 Software
8/22/2009
Copyright 2009, All Rights Reserved.
At the discretion of the user of this library,
this software may be licensed under the terms of the
GNU General Public License v3, a BSD-Style license, or the
original HIDAPI license as outlined in the LICENSE.txt,
LICENSE-gpl3.txt, LICENSE-bsd.txt, and LICENSE-orig.txt
files located at the root of the source distribution.
These files may also be found in the public source
code repository located at:
http://github.com/signal11/hidapi .
********************************************************/
/* Copy of LICENSE-orig.txt (compatible with MIT/x11 license)
HIDAPI - Multi-Platform library for
communication with HID devices.
Copyright 2009, Alan Ott, Signal 11 Software.
All Rights Reserved.
This software may be used by anyone for any reason so
long as the copyright notice in the source files
remains intact.
*/
#include <windows.h>
#ifndef _NTDEF_
typedef LONG NTSTATUS;
#endif
#ifdef __MINGW32__
#include <ntdef.h>
#include <winbase.h>
#endif
#ifdef __CYGWIN__
#include <ntdef.h>
#define _wcsdup wcsdup
#endif
/* The maximum number of characters that can be passed into the
HidD_Get*String() functions without it failing.*/
#define MAX_STRING_WCHARS 0xFFF
/*#define HIDAPI_USE_DDK*/
#if defined(WINDOWS) || defined(WIN32) || defined(WIN64) \
|| defined(_WIN32) || defined(_WIN64)
#ifndef strdup
#define strdup _strdup
#endif
#endif
#ifdef __cplusplus
extern "C" {
#endif
#ifdef TCC
typedef struct _SP_DEVINFO_DATA {
DWORD cbSize;
GUID ClassGuid;
DWORD DevInst;
ULONG_PTR Reserved;
} SP_DEVINFO_DATA, *PSP_DEVINFO_DATA;
typedef struct _SP_DEVICE_INTERFACE_DATA {
DWORD cbSize;
GUID InterfaceClassGuid;
DWORD Flags;
ULONG_PTR Reserved;
} SP_DEVICE_INTERFACE_DATA, *PSP_DEVICE_INTERFACE_DATA;
typedef struct _SP_DEVICE_INTERFACE_DETAIL_DATA {
DWORD cbSize;
CHAR DevicePath[ANYSIZE_ARRAY];
} SP_DEVICE_INTERFACE_DETAIL_DATA_A, *PSP_DEVICE_INTERFACE_DETAIL_DATA_A;
typedef PVOID HDEVINFO;
HDEVINFO WINAPI SetupDiGetClassDevsA(CONST GUID*,PCSTR,HWND,DWORD);
#define DIGCF_PRESENT 0x00000002
#define DIGCF_DEVICEINTERFACE 0x00000010
#define SPDRP_CLASS 7
#define SPDRP_DRIVER 9
#define FILE_DEVICE_KEYBOARD 0x0000000b
#define METHOD_OUT_DIRECT 2
enum
{ FILE_ANY_ACCESS = 0x00000000UL,
FILE_SPECIAL_ACCESS = FILE_ANY_ACCESS,
FILE_READ_ACCESS = 0x00000001UL,
FILE_WRITE_ACCESS = 0x00000002UL
};
#define CTL_CODE(t,f,m,a) (((t)<<16)|((a)<<14)|((f)<<2)|(m))
#define WINSETUPAPI __declspec(dllimport) //XXX Should these be CDECL?
WINSETUPAPI BOOL SetupDiEnumDeviceInterfaces(
HDEVINFO DeviceInfoSet,
PSP_DEVINFO_DATA DeviceInfoData,
const GUID *InterfaceClassGuid,
DWORD MemberIndex,
PSP_DEVICE_INTERFACE_DATA DeviceInterfaceData
);
WINSETUPAPI BOOL SetupDiGetDeviceInterfaceDetailA(
HDEVINFO DeviceInfoSet,
PSP_DEVICE_INTERFACE_DATA DeviceInterfaceData,
PSP_DEVICE_INTERFACE_DETAIL_DATA_A DeviceInterfaceDetailData,
DWORD DeviceInterfaceDetailDataSize,
PDWORD RequiredSize,
PSP_DEVINFO_DATA DeviceInfoData
);
WINSETUPAPI BOOL SetupDiEnumDeviceInfo(
HDEVINFO DeviceInfoSet,
DWORD MemberIndex,
PSP_DEVINFO_DATA DeviceInfoData
);
WINSETUPAPI BOOL SetupDiGetDeviceRegistryPropertyA(
HDEVINFO DeviceInfoSet,
PSP_DEVINFO_DATA DeviceInfoData,
DWORD Property,
PDWORD PropertyRegDataType,
PBYTE PropertyBuffer,
DWORD PropertyBufferSize,
PDWORD RequiredSize
);
WINSETUPAPI BOOL SetupDiDestroyDeviceInfoList(
HDEVINFO DeviceInfoSet
);
#else
#include <setupapi.h>
#include <winioctl.h>
#endif
#ifdef HIDAPI_USE_DDK
#include <hidsdi.h>
#endif
/* Copied from inc/ddk/hidclass.h, part of the Windows DDK. */
#define HID_OUT_CTL_CODE(id) \
CTL_CODE(FILE_DEVICE_KEYBOARD, (id), METHOD_OUT_DIRECT, FILE_ANY_ACCESS)
#define IOCTL_HID_GET_FEATURE HID_OUT_CTL_CODE(100)
#ifdef __cplusplus
} /* extern "C" */
#endif
#include <stdio.h>
#include <stdlib.h>
#include "hidapi.h"
#undef MIN
#define MIN(x,y) ((x) < (y)? (x): (y))
#ifdef _MSC_VER
/* Thanks Microsoft, but I know how to use strncpy(). */
#pragma warning(disable:4996)
#endif
#ifdef __cplusplus
extern "C" {
#endif
#ifndef HIDAPI_USE_DDK
/* Since we're not building with the DDK, and the HID header
files aren't part of the SDK, we have to define all this
stuff here. In lookup_functions(), the function pointers
defined below are set. */
typedef struct _HIDD_ATTRIBUTES{
ULONG Size;
USHORT VendorID;
USHORT ProductID;
USHORT VersionNumber;
} HIDD_ATTRIBUTES, *PHIDD_ATTRIBUTES;
typedef USHORT USAGE;
typedef struct _HIDP_CAPS {
USAGE Usage;
USAGE UsagePage;
USHORT InputReportByteLength;
USHORT OutputReportByteLength;
USHORT FeatureReportByteLength;
USHORT Reserved[17];
USHORT fields_not_used_by_hidapi[10];
} HIDP_CAPS, *PHIDP_CAPS;
typedef void* PHIDP_PREPARSED_DATA;
#define HIDP_STATUS_SUCCESS 0x110000
typedef BOOLEAN (__stdcall *HidD_GetAttributes_)(HANDLE device, PHIDD_ATTRIBUTES attrib);
typedef BOOLEAN (__stdcall *HidD_GetSerialNumberString_)(HANDLE device, PVOID buffer, ULONG buffer_len);
typedef BOOLEAN (__stdcall *HidD_GetManufacturerString_)(HANDLE handle, PVOID buffer, ULONG buffer_len);
typedef BOOLEAN (__stdcall *HidD_GetProductString_)(HANDLE handle, PVOID buffer, ULONG buffer_len);
typedef BOOLEAN (__stdcall *HidD_SetFeature_)(HANDLE handle, PVOID data, ULONG length);
typedef BOOLEAN (__stdcall *HidD_GetFeature_)(HANDLE handle, PVOID data, ULONG length);
typedef BOOLEAN (__stdcall *HidD_GetIndexedString_)(HANDLE handle, ULONG string_index, PVOID buffer, ULONG buffer_len);
typedef BOOLEAN (__stdcall *HidD_GetPreparsedData_)(HANDLE handle, PHIDP_PREPARSED_DATA *preparsed_data);
typedef BOOLEAN (__stdcall *HidD_FreePreparsedData_)(PHIDP_PREPARSED_DATA preparsed_data);
typedef NTSTATUS (__stdcall *HidP_GetCaps_)(PHIDP_PREPARSED_DATA preparsed_data, HIDP_CAPS *caps);
typedef BOOLEAN (__stdcall *HidD_SetNumInputBuffers_)(HANDLE handle, ULONG number_buffers);
static HidD_GetAttributes_ HidD_GetAttributes;
static HidD_GetSerialNumberString_ HidD_GetSerialNumberString;
static HidD_GetManufacturerString_ HidD_GetManufacturerString;
static HidD_GetProductString_ HidD_GetProductString;
static HidD_SetFeature_ HidD_SetFeature;
static HidD_GetFeature_ HidD_GetFeature;
static HidD_GetIndexedString_ HidD_GetIndexedString;
static HidD_GetPreparsedData_ HidD_GetPreparsedData;
static HidD_FreePreparsedData_ HidD_FreePreparsedData;
static HidP_GetCaps_ HidP_GetCaps;
static HidD_SetNumInputBuffers_ HidD_SetNumInputBuffers;
static HMODULE lib_handle = NULL;
static BOOLEAN initialized = FALSE;
#endif /* HIDAPI_USE_DDK */
struct hid_device_ {
HANDLE device_handle;
BOOL blocking;
USHORT output_report_length;
size_t input_report_length;
void *last_error_str;
DWORD last_error_num;
BOOL read_pending;
char *read_buf;
OVERLAPPED ol;
};
static hid_device *new_hid_device()
{
hid_device *dev = (hid_device*) calloc(1, sizeof(hid_device));
dev->device_handle = INVALID_HANDLE_VALUE;
dev->blocking = TRUE;
dev->output_report_length = 0;
dev->input_report_length = 0;
dev->last_error_str = NULL;
dev->last_error_num = 0;
dev->read_pending = FALSE;
dev->read_buf = NULL;
memset(&dev->ol, 0, sizeof(dev->ol));
dev->ol.hEvent = CreateEvent(NULL, FALSE, FALSE /*initial state f=nonsignaled*/, NULL);
return dev;
}
static void free_hid_device(hid_device *dev)
{
CloseHandle(dev->ol.hEvent);
CloseHandle(dev->device_handle);
LocalFree(dev->last_error_str);
free(dev->read_buf);
free(dev);
}
static void register_error(hid_device *device, const char *op)
{
WCHAR *ptr, *msg;
FormatMessageW(FORMAT_MESSAGE_ALLOCATE_BUFFER |
FORMAT_MESSAGE_FROM_SYSTEM |
FORMAT_MESSAGE_IGNORE_INSERTS,
NULL,
GetLastError(),
MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT),
(LPVOID)&msg, 0/*sz*/,
NULL);
/* Get rid of the CR and LF that FormatMessage() sticks at the
end of the message. Thanks Microsoft! */
ptr = msg;
while (*ptr) {
if (*ptr == '\r') {
*ptr = 0x0000;
break;
}
ptr++;
}
/* Store the message off in the Device entry so that
the hid_error() function can pick it up. */
LocalFree(device->last_error_str);
device->last_error_str = msg;
}
#ifndef HIDAPI_USE_DDK
static int lookup_functions()
{
lib_handle = LoadLibraryA("hid.dll");
if (lib_handle) {
#define RESOLVE(x) x = (x##_)GetProcAddress(lib_handle, #x); if (!x) return -1;
RESOLVE(HidD_GetAttributes);
RESOLVE(HidD_GetSerialNumberString);
RESOLVE(HidD_GetManufacturerString);
RESOLVE(HidD_GetProductString);
RESOLVE(HidD_SetFeature);
RESOLVE(HidD_GetFeature);
RESOLVE(HidD_GetIndexedString);
RESOLVE(HidD_GetPreparsedData);
RESOLVE(HidD_FreePreparsedData);
RESOLVE(HidP_GetCaps);
RESOLVE(HidD_SetNumInputBuffers);
#undef RESOLVE
}
else
return -1;
return 0;
}
#endif
static HANDLE open_device(const char *path, BOOL enumerate)
{
HANDLE handle;
DWORD desired_access = (enumerate)? 0: (GENERIC_WRITE | GENERIC_READ);
DWORD share_mode = FILE_SHARE_READ|FILE_SHARE_WRITE;
handle = CreateFileA(path,
desired_access,
share_mode,
NULL,
OPEN_EXISTING,
FILE_FLAG_OVERLAPPED,/*FILE_ATTRIBUTE_NORMAL,*/
0);
return handle;
}
int HID_API_EXPORT hid_init(void)
{
#ifndef HIDAPI_USE_DDK
if (!initialized) {
if (lookup_functions() < 0) {
hid_exit();
return -1;
}
initialized = TRUE;
}
#endif
return 0;
}
int HID_API_EXPORT hid_exit(void)
{
#ifndef HIDAPI_USE_DDK
if (lib_handle)
FreeLibrary(lib_handle);
lib_handle = NULL;
initialized = FALSE;
#endif
return 0;
}
struct hid_device_info HID_API_EXPORT * HID_API_CALL hid_enumerate(unsigned short vendor_id, unsigned short product_id)
{
BOOL res;
struct hid_device_info *root = NULL; /* return object */
struct hid_device_info *cur_dev = NULL;
/* Windows objects for interacting with the driver. */
GUID InterfaceClassGuid = {0x4d1e55b2, 0xf16f, 0x11cf, {0x88, 0xcb, 0x00, 0x11, 0x11, 0x00, 0x00, 0x30} };
SP_DEVINFO_DATA devinfo_data;
SP_DEVICE_INTERFACE_DATA device_interface_data;
SP_DEVICE_INTERFACE_DETAIL_DATA_A *device_interface_detail_data = NULL;
HDEVINFO device_info_set = INVALID_HANDLE_VALUE;
int device_index = 0;
int i;
if (hid_init() < 0)
return NULL;
/* Initialize the Windows objects. */
memset(&devinfo_data, 0x0, sizeof(devinfo_data));
devinfo_data.cbSize = sizeof(SP_DEVINFO_DATA);
device_interface_data.cbSize = sizeof(SP_DEVICE_INTERFACE_DATA);
/* Get information for all the devices belonging to the HID class. */
device_info_set = SetupDiGetClassDevsA(&InterfaceClassGuid, NULL, NULL, DIGCF_PRESENT | DIGCF_DEVICEINTERFACE);
/* Iterate over each device in the HID class, looking for the right one. */
for (;;) {
HANDLE write_handle = INVALID_HANDLE_VALUE;
DWORD required_size = 0;
HIDD_ATTRIBUTES attrib;
res = SetupDiEnumDeviceInterfaces(device_info_set,
NULL,
&InterfaceClassGuid,
device_index,
&device_interface_data);
if (!res) {
/* A return of FALSE from this function means that
there are no more devices. */
break;
}
/* Call with 0-sized detail size, and let the function
tell us how long the detail struct needs to be. The
size is put in &required_size. */
res = SetupDiGetDeviceInterfaceDetailA(device_info_set,
&device_interface_data,
NULL,
0,
&required_size,
NULL);
/* Allocate a long enough structure for device_interface_detail_data. */
device_interface_detail_data = (SP_DEVICE_INTERFACE_DETAIL_DATA_A*) malloc(required_size);
device_interface_detail_data->cbSize = sizeof(SP_DEVICE_INTERFACE_DETAIL_DATA_A);
/* Get the detailed data for this device. The detail data gives us
the device path for this device, which is then passed into
CreateFile() to get a handle to the device. */
res = SetupDiGetDeviceInterfaceDetailA(device_info_set,
&device_interface_data,
device_interface_detail_data,
required_size,
NULL,
NULL);
if (!res) {
/* register_error(dev, "Unable to call SetupDiGetDeviceInterfaceDetail");
Continue to the next device. */
goto cont;
}
/* Make sure this device is of Setup Class "HIDClass" and has a
driver bound to it. */
for (i = 0; ; i++) {
char driver_name[256];
/* Populate devinfo_data. This function will return failure
when there are no more interfaces left. */
res = SetupDiEnumDeviceInfo(device_info_set, i, &devinfo_data);
if (!res)
goto cont;
res = SetupDiGetDeviceRegistryPropertyA(device_info_set, &devinfo_data,
SPDRP_CLASS, NULL, (PBYTE)driver_name, sizeof(driver_name), NULL);
if (!res)
goto cont;
if (strcmp(driver_name, "HIDClass") == 0) {
/* See if there's a driver bound. */
res = SetupDiGetDeviceRegistryPropertyA(device_info_set, &devinfo_data,
SPDRP_DRIVER, NULL, (PBYTE)driver_name, sizeof(driver_name), NULL);
if (res)
break;
}
}
//wprintf(L"HandleName: %s\n", device_interface_detail_data->DevicePath);
/* Open a handle to the device */
write_handle = open_device(device_interface_detail_data->DevicePath, TRUE);
/* Check validity of write_handle. */
if (write_handle == INVALID_HANDLE_VALUE) {
/* Unable to open the device. */
//register_error(dev, "CreateFile");
goto cont_close;
}
/* Get the Vendor ID and Product ID for this device. */
attrib.Size = sizeof(HIDD_ATTRIBUTES);
HidD_GetAttributes(write_handle, &attrib);
//wprintf(L"Product/Vendor: %x %x\n", attrib.ProductID, attrib.VendorID);
/* Check the VID/PID to see if we should add this
device to the enumeration list. */
if ((vendor_id == 0x0 || attrib.VendorID == vendor_id) &&
(product_id == 0x0 || attrib.ProductID == product_id)) {
#define WSTR_LEN 512
const char *str;
struct hid_device_info *tmp;
PHIDP_PREPARSED_DATA pp_data = NULL;
HIDP_CAPS caps;
BOOLEAN res;
NTSTATUS nt_res;
wchar_t wstr[WSTR_LEN]; /* TODO: Determine Size */
size_t len;
/* VID/PID match. Create the record. */
tmp = (struct hid_device_info*) calloc(1, sizeof(struct hid_device_info));
if (cur_dev) {
cur_dev->next = tmp;
}
else {
root = tmp;
}
cur_dev = tmp;
/* Get the Usage Page and Usage for this device. */
res = HidD_GetPreparsedData(write_handle, &pp_data);
if (res) {
nt_res = HidP_GetCaps(pp_data, &caps);
if (nt_res == HIDP_STATUS_SUCCESS) {
cur_dev->usage_page = caps.UsagePage;
cur_dev->usage = caps.Usage;
}
HidD_FreePreparsedData(pp_data);
}
/* Fill out the record */
cur_dev->next = NULL;
str = device_interface_detail_data->DevicePath;
if (str) {
len = strlen(str);
cur_dev->path = (char*) calloc(len+1, sizeof(char));
strncpy(cur_dev->path, str, len+1);
cur_dev->path[len] = '\0';
}
else
cur_dev->path = NULL;
/* Serial Number */
res = HidD_GetSerialNumberString(write_handle, wstr, sizeof(wstr));
wstr[WSTR_LEN-1] = 0x0000;
if (res) {
cur_dev->serial_number = _wcsdup(wstr);
}
/* Manufacturer String */
res = HidD_GetManufacturerString(write_handle, wstr, sizeof(wstr));
wstr[WSTR_LEN-1] = 0x0000;
if (res) {
cur_dev->manufacturer_string = _wcsdup(wstr);
}
/* Product String */
res = HidD_GetProductString(write_handle, wstr, sizeof(wstr));
wstr[WSTR_LEN-1] = 0x0000;
if (res) {
cur_dev->product_string = _wcsdup(wstr);
}
/* VID/PID */
cur_dev->vendor_id = attrib.VendorID;
cur_dev->product_id = attrib.ProductID;
/* Release Number */
cur_dev->release_number = attrib.VersionNumber;
/* Interface Number. It can sometimes be parsed out of the path
on Windows if a device has multiple interfaces. See
http://msdn.microsoft.com/en-us/windows/hardware/gg487473 or
search for "Hardware IDs for HID Devices" at MSDN. If it's not
in the path, it's set to -1. */
cur_dev->interface_number = -1;
if (cur_dev->path) {
char *interface_component = strstr(cur_dev->path, "&mi_");
if (interface_component) {
char *hex_str = interface_component + 4;
char *endptr = NULL;
cur_dev->interface_number = strtol(hex_str, &endptr, 16);
if (endptr == hex_str) {
/* The parsing failed. Set interface_number to -1. */
cur_dev->interface_number = -1;
}
}
}
}
cont_close:
CloseHandle(write_handle);
cont:
/* We no longer need the detail data. It can be freed */
free(device_interface_detail_data);
device_index++;
}
/* Close the device information handle. */
SetupDiDestroyDeviceInfoList(device_info_set);
return root;
}
void HID_API_EXPORT HID_API_CALL hid_free_enumeration(struct hid_device_info *devs)
{
/* TODO: Merge this with the Linux version. This function is platform-independent. */
struct hid_device_info *d = devs;
while (d) {
struct hid_device_info *next = d->next;
free(d->path);
free(d->serial_number);
free(d->manufacturer_string);
free(d->product_string);
free(d);
d = next;
}
}
HID_API_EXPORT hid_device * HID_API_CALL hid_open(unsigned short vendor_id, unsigned short product_id, const wchar_t *serial_number)
{
/* TODO: Merge this functions with the Linux version. This function should be platform independent. */
struct hid_device_info *devs, *cur_dev;
const char *path_to_open = NULL;
hid_device *handle = NULL;
devs = hid_enumerate(vendor_id, product_id);
cur_dev = devs;
while (cur_dev) {
if (cur_dev->vendor_id == vendor_id &&
cur_dev->product_id == product_id) {
if (serial_number) {
if (wcscmp(serial_number, cur_dev->serial_number) == 0) {
path_to_open = cur_dev->path;
break;
}
}
else {
path_to_open = cur_dev->path;
break;
}
}
cur_dev = cur_dev->next;
}
if (path_to_open) {
/* Open the device */
handle = hid_open_path(path_to_open);
}
hid_free_enumeration(devs);
return handle;
}
HID_API_EXPORT hid_device * HID_API_CALL hid_open_path(const char *path)
{
hid_device *dev;
HIDP_CAPS caps;
PHIDP_PREPARSED_DATA pp_data = NULL;
BOOLEAN res;
NTSTATUS nt_res;
if (hid_init() < 0) {
return NULL;
}
dev = new_hid_device();
/* Open a handle to the device */
dev->device_handle = open_device(path, FALSE);
/* Check validity of write_handle. */
if (dev->device_handle == INVALID_HANDLE_VALUE) {
/* Unable to open the device. */
register_error(dev, "CreateFile");
goto err;
}
/* Set the Input Report buffer size to 64 reports. */
res = HidD_SetNumInputBuffers(dev->device_handle, 64);
if (!res) {
register_error(dev, "HidD_SetNumInputBuffers");
goto err;
}
/* Get the Input Report length for the device. */
res = HidD_GetPreparsedData(dev->device_handle, &pp_data);
if (!res) {
register_error(dev, "HidD_GetPreparsedData");
goto err;
}
nt_res = HidP_GetCaps(pp_data, &caps);
if (nt_res != HIDP_STATUS_SUCCESS) {
register_error(dev, "HidP_GetCaps");
goto err_pp_data;
}
dev->output_report_length = caps.OutputReportByteLength;
dev->input_report_length = caps.InputReportByteLength;
HidD_FreePreparsedData(pp_data);
dev->read_buf = (char*) malloc(dev->input_report_length);
return dev;
err_pp_data:
HidD_FreePreparsedData(pp_data);
err:
free_hid_device(dev);
return NULL;
}
int HID_API_EXPORT HID_API_CALL hid_write(hid_device *dev, const unsigned char *data, size_t length)
{
DWORD bytes_written;
BOOL res;
OVERLAPPED ol;
unsigned char *buf;
memset(&ol, 0, sizeof(ol));
/* Make sure the right number of bytes are passed to WriteFile. Windows
expects the number of bytes which are in the _longest_ report (plus
one for the report number) bytes even if the data is a report
which is shorter than that. Windows gives us this value in
caps.OutputReportByteLength. If a user passes in fewer bytes than this,
create a temporary buffer which is the proper size. */
if (length >= dev->output_report_length) {
/* The user passed the right number of bytes. Use the buffer as-is. */
buf = (unsigned char *) data;
} else {
/* Create a temporary buffer and copy the user's data
into it, padding the rest with zeros. */
buf = (unsigned char *) malloc(dev->output_report_length);
memcpy(buf, data, length);
memset(buf + length, 0, dev->output_report_length - length);
length = dev->output_report_length;
}
res = WriteFile(dev->device_handle, buf, (DWORD)length, NULL, &ol);
int err = GetLastError();
if (!res) {
if (err != ERROR_IO_PENDING) {
/* WriteFile() failed. Return error. */
register_error(dev, "WriteFile");
bytes_written = -1;
goto end_of_function;
}
}
/* Wait here until the write is done. This makes
hid_write() synchronous. */
res = GetOverlappedResult(dev->device_handle, &ol, &bytes_written, TRUE/*wait*/);
if (!res) {
/* The Write operation failed. */
register_error(dev, "WriteFile");
bytes_written = -1;
goto end_of_function;
}
end_of_function:
if (buf != data)
free(buf);
return bytes_written;
}
int HID_API_EXPORT HID_API_CALL hid_read_timeout(hid_device *dev, unsigned char *data, size_t length, int milliseconds)
{
DWORD bytes_read = 0;
size_t copy_len = 0;
BOOL res;
/* Copy the handle for convenience. */
HANDLE ev = dev->ol.hEvent;
if (!dev->read_pending) {
/* Start an Overlapped I/O read. */
dev->read_pending = TRUE;
memset(dev->read_buf, 0, dev->input_report_length);
ResetEvent(ev);
res = ReadFile(dev->device_handle, dev->read_buf, (DWORD)dev->input_report_length, &bytes_read, &dev->ol);
if (!res) {
if (GetLastError() != ERROR_IO_PENDING) {
/* ReadFile() has failed.
Clean up and return error. */
CancelIo(dev->device_handle);
dev->read_pending = FALSE;
goto end_of_function;
}
}
}
if (milliseconds >= 0) {
/* See if there is any data yet. */
res = WaitForSingleObject(ev, milliseconds);
if (res != WAIT_OBJECT_0) {
/* There was no data this time. Return zero bytes available,
but leave the Overlapped I/O running. */
return 0;
}
}
/* Either WaitForSingleObject() told us that ReadFile has completed, or
we are in non-blocking mode. Get the number of bytes read. The actual
data has been copied to the data[] array which was passed to ReadFile(). */
res = GetOverlappedResult(dev->device_handle, &dev->ol, &bytes_read, TRUE/*wait*/);
/* Set pending back to false, even if GetOverlappedResult() returned error. */
dev->read_pending = FALSE;
if (res && bytes_read > 0) {
if (dev->read_buf[0] == 0x0) {
/* If report numbers aren't being used, but Windows sticks a report
number (0x0) on the beginning of the report anyway. To make this
work like the other platforms, and to make it work more like the
HID spec, we'll skip over this byte. */
bytes_read--;
copy_len = length > bytes_read ? bytes_read : length;
memcpy(data, dev->read_buf+1, copy_len);
}
else {
/* Copy the whole buffer, report number and all. */
copy_len = length > bytes_read ? bytes_read : length;
memcpy(data, dev->read_buf, copy_len);
}
}
end_of_function:
if (!res) {
register_error(dev, "GetOverlappedResult");
return -1;
}
return (int)copy_len;
}
int HID_API_EXPORT HID_API_CALL hid_read(hid_device *dev, unsigned char *data, size_t length)
{
return hid_read_timeout(dev, data, length, (dev->blocking)? -1: 0);
}
int HID_API_EXPORT HID_API_CALL hid_set_nonblocking(hid_device *dev, int nonblock)
{
dev->blocking = !nonblock;
return 0; /* Success */
}
int HID_API_EXPORT HID_API_CALL hid_send_feature_report(hid_device *dev, const unsigned char *data, size_t length)
{
BOOL res = HidD_SetFeature(dev->device_handle, (PVOID)data, (ULONG)length);
if (!res) {
register_error(dev, "HidD_SetFeature");
return -1;
}
return (int)length;
}
int HID_API_EXPORT HID_API_CALL hid_get_feature_report(hid_device *dev, unsigned char *data, size_t length)
{
BOOL res;
#if 0
res = HidD_GetFeature(dev->device_handle, data, length);
if (!res) {
register_error(dev, "HidD_GetFeature");
return -1;
}
return 0; /* HidD_GetFeature() doesn't give us an actual length, unfortunately */
#else
DWORD bytes_returned;
OVERLAPPED ol;
memset(&ol, 0, sizeof(ol));
res = DeviceIoControl(dev->device_handle,
IOCTL_HID_GET_FEATURE,
data, (DWORD)length,
data, (DWORD)length,
&bytes_returned, &ol);
if (!res) {
if (GetLastError() != ERROR_IO_PENDING) {
/* DeviceIoControl() failed. Return error. */
register_error(dev, "Send Feature Report DeviceIoControl");
return -1;
}
}
/* Wait here until the write is done. This makes
hid_get_feature_report() synchronous. */
res = GetOverlappedResult(dev->device_handle, &ol, &bytes_returned, TRUE/*wait*/);
if (!res) {
/* The operation failed. */
register_error(dev, "Send Feature Report GetOverLappedResult");
return -1;
}
/* bytes_returned does not include the first byte which contains the
report ID. The data buffer actually contains one more byte than
bytes_returned. */
bytes_returned++;
return bytes_returned;
#endif
}
void HID_API_EXPORT HID_API_CALL hid_close(hid_device *dev)
{
if (!dev)
return;
CancelIo(dev->device_handle);
free_hid_device(dev);
}
int HID_API_EXPORT_CALL HID_API_CALL hid_get_manufacturer_string(hid_device *dev, wchar_t *string, size_t maxlen)
{
BOOL res;
res = HidD_GetManufacturerString(dev->device_handle, string, (ULONG)(sizeof(wchar_t) * MIN(maxlen, MAX_STRING_WCHARS)));
if (!res) {
register_error(dev, "HidD_GetManufacturerString");
return -1;
}
return 0;
}
int HID_API_EXPORT_CALL HID_API_CALL hid_get_product_string(hid_device *dev, wchar_t *string, size_t maxlen)
{
BOOL res;
res = HidD_GetProductString(dev->device_handle, string, (ULONG)(sizeof(wchar_t) * MIN(maxlen, MAX_STRING_WCHARS)));
if (!res) {
register_error(dev, "HidD_GetProductString");
return -1;
}
return 0;
}
int HID_API_EXPORT_CALL HID_API_CALL hid_get_serial_number_string(hid_device *dev, wchar_t *string, size_t maxlen)
{
BOOL res;
res = HidD_GetSerialNumberString(dev->device_handle, string, (ULONG)(sizeof(wchar_t) * MIN(maxlen, MAX_STRING_WCHARS)));
if (!res) {
register_error(dev, "HidD_GetSerialNumberString");
return -1;
}
return 0;
}
int HID_API_EXPORT_CALL HID_API_CALL hid_get_indexed_string(hid_device *dev, int string_index, wchar_t *string, size_t maxlen)
{
BOOL res;
res = HidD_GetIndexedString(dev->device_handle, string_index, string, (ULONG)(sizeof(wchar_t) * MIN(maxlen, MAX_STRING_WCHARS)));
if (!res) {
register_error(dev, "HidD_GetIndexedString");
return -1;
}
return 0;
}
HID_API_EXPORT const wchar_t * HID_API_CALL hid_error(hid_device *dev)
{
return (wchar_t*)dev->last_error_str;
}
/*#define PICPGM*/
/*#define S11*/
#define P32
#ifdef S11
unsigned short VendorID = 0xa0a0;
unsigned short ProductID = 0x0001;
#endif
#ifdef P32
unsigned short VendorID = 0x04d8;
unsigned short ProductID = 0x3f;
#endif
#ifdef PICPGM
unsigned short VendorID = 0x04d8;
unsigned short ProductID = 0x0033;
#endif
#if 0
int __cdecl main(int argc, char* argv[])
{
int res;
unsigned char buf[65];
UNREFERENCED_PARAMETER(argc);
UNREFERENCED_PARAMETER(argv);
/* Set up the command buffer. */