File: fcd.c

package info (click to toggle)
qthid-fcd-controller 4.1-3
  • links: PTS
  • area: main
  • in suites: buster, jessie, jessie-kfreebsd, stretch
  • size: 1,368 kB
  • ctags: 882
  • sloc: ansic: 5,558; cpp: 2,269; makefile: 16; sh: 14
file content (819 lines) | stat: -rw-r--r-- 21,988 bytes parent folder | download | duplicates (2)
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
/***************************************************************************
 *  This file is part of Qthid.
 * 
 *  Copyright (C) 2010       Howard Long, G6LVB
 *  Copyright (C) 2011       Mario Lorenz, DL5MLO
 *  Copyright (C) 2011-2012  Alexandru Csete, OZ9AEC
 *
 *  Qthid is free software: you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation, either version 3 of the License, or
 *  (at your option) any later version.
 *
 *  Qthid is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with Qthid.  If not, see <http://www.gnu.org/licenses/>.
 *
 ***************************************************************************/

#define FCD
#include <string.h>
#ifdef WIN32
    #include <malloc.h>
#else
    #include <stdlib.h>
#endif
#include <stdio.h>
#include "hidapi.h"
#include "fcdhidcmd.h"
#include "fcd.h"


#define FALSE 0
#define TRUE 1
typedef int BOOL;


const unsigned short _usVID=0x04D8;  /*!< USB vendor ID. */
const unsigned short _usPID=0xFB31;  /*!< USB product ID. */



/** \brief Open FCD device.
  * \return Pointer to the FCD HID device or NULL if none found
  *
  * This function looks for FCD devices connected to the computer and
  * opens the first one found.
  */
static hid_device *fcdOpen(void)
{
    struct hid_device_info *phdi=NULL;
    hid_device *phd=NULL;
    char *pszPath=NULL;

    phdi=hid_enumerate(_usVID,_usPID);
    if (phdi==NULL)
    {
        return NULL; // No FCD device found
    }

    pszPath=strdup(phdi->path);
    if (pszPath==NULL)
    {
        return NULL;
    }

    hid_free_enumeration(phdi);
    phdi=NULL;

    if ((phd=hid_open_path(pszPath)) == NULL)
    {
        free(pszPath);
        pszPath=NULL;

        return NULL;
    }

    free(pszPath);
    pszPath=NULL;

    return phd;
}


/** \brief Close FCD HID device. */
static void fcdClose(hid_device *phd)
{
    hid_close(phd);
}


/** \brief Get FCD mode.
  * \return The current FCD mode.
  * \sa FCD_MODE_ENUM
  */
EXTERN FCD_API_EXPORT FCD_API_CALL FCD_MODE_ENUM fcdGetMode(void)
{
    hid_device *phd=NULL;
    unsigned char aucBufIn[65];
    unsigned char aucBufOut[65];
    FCD_MODE_ENUM fcd_mode = FCD_MODE_NONE;


    phd = fcdOpen();

    if (phd == NULL)
    {
        return FCD_MODE_NONE;
    }

    /* Send a BL Query Command */
    aucBufOut[0] = 0; // Report ID. Ignored by HID Class firmware as only config'd for one report
    aucBufOut[1] = FCD_CMD_BL_QUERY;
    hid_write(phd, aucBufOut, 65);
    memset(aucBufIn, 0xCC, 65); // Clear out the response buffer
    hid_read(phd, aucBufIn, 65);

    fcdClose(phd);
    phd = NULL;

    /* first check status bytes then check which mode */
    if (aucBufIn[0]==FCD_CMD_BL_QUERY && aucBufIn[1]==1) {

        /* In bootloader mode we have the string "FCDBL" starting at acBufIn[2] **/
        if (strncmp((char *)(aucBufIn+2), "FCDBL", 5) == 0) {
            fcd_mode = FCD_MODE_BL;
        }
        /* In application mode we have "FCDAPP_18.06" where the number is the FW version */
        else if (strncmp((char *)(aucBufIn+2), "FCDAPP", 6) == 0) {
            fcd_mode = FCD_MODE_APP;
        }
        /* either no FCD or firmware less than 18f */
        else {
            fcd_mode = FCD_MODE_NONE;
        }
    }

    return fcd_mode;
}


/** \brief Get FCD firmware version as string.
  * \param str The returned vesion number as a 0 terminated string (must be pre-allocated)
  * \return The current FCD mode.
  * \sa FCD_MODE_ENUM
  */
EXTERN FCD_API_EXPORT FCD_API_CALL FCD_MODE_ENUM fcdGetFwVerStr(char *str)
{
    hid_device *phd=NULL;
    unsigned char aucBufIn[65];
    unsigned char aucBufOut[65];
    FCD_MODE_ENUM fcd_mode = FCD_MODE_NONE;

    phd = fcdOpen();

    if (phd == NULL)
    {
        return FCD_MODE_NONE;
    }

    /* Send a BL Query Command */
    aucBufOut[0] = 0; // Report ID. Ignored by HID Class firmware as only config'd for one report
    aucBufOut[1] = FCD_CMD_BL_QUERY;
    hid_write(phd, aucBufOut, 65);
    memset(aucBufIn, 0xCC, 65); // Clear out the response buffer
    hid_read(phd, aucBufIn, 65);

    fcdClose(phd);
    phd = NULL;

    /* first check status bytes then check which mode */
    if (aucBufIn[0]==FCD_CMD_BL_QUERY && aucBufIn[1]==1) {

        /* In bootloader mode we have the string "FCDBL" starting at acBufIn[2] **/
        if (strncmp((char *)(aucBufIn+2), "FCDBL", 5) == 0) {
            fcd_mode = FCD_MODE_BL;
        }
        /* In application mode we have "FCDAPP_18.06" where the number is the FW version */
        else if (strncmp((char *)(aucBufIn+2), "FCDAPP", 6) == 0) {
            strncpy(str, (char *)(aucBufIn+9), 5);
            str[5] = 0;
            fcd_mode = FCD_MODE_APP;
        }
        /* either no FCD or firmware less than 18f */
        else {
            fcd_mode = FCD_MODE_NONE;
        }
    }

    return fcd_mode;
}


/** \brief Reset FCD to bootloader mode.
  * \return FCD_MODE_NONE
  *
  * This function is used to switch the FCD into bootloader mode in which
  * various firmware operations can be performed.
  */
EXTERN FCD_API_EXPORT FCD_API_CALL FCD_MODE_ENUM fcdAppReset(void)
{
    hid_device *phd=NULL;
    //unsigned char aucBufIn[65];
    unsigned char aucBufOut[65];

    phd = fcdOpen();

    if (phd == NULL)
    {
        return FCD_MODE_NONE;
    }

    // Send an App reset command
    aucBufOut[0] = 0; // Report ID. Ignored by HID Class firmware as only config'd for one report
    aucBufOut[1] = FCD_CMD_APP_RESET;
    hid_write(phd, aucBufOut, 65);

    /** FIXME: hid_read() will occasionally hang due to a pthread_cond_wait() never returning.
        It seems that the read_callback() in hid-libusb.c will never receive any
        data during the reconfiguration. Since the same logic works in the native
        windows application, it could be a libusb thing. Anyhow, since the value
        returned by this function is not used, we may as well just skip the hid_read()
        and return FME_NONE.
        Correct switch from APP to BL mode can be observed in /var/log/messages (linux)
        (when in bootloader mode the device version includes 'BL')
    */
    /*
    memset(aucBufIn,0xCC,65); // Clear out the response buffer
    hid_read(phd,aucBufIn,65);

    if (aucBufIn[0]==FCDCMDAPPRESET && aucBufIn[1]==1)
    {
        FCDClose(phd);
        phd=NULL;
        return FME_APP;
    }
    FCDClose(phd);
    phd=NULL;
    return FME_BL;
    */

    fcdClose(phd);
    phd = NULL;

    return FCD_MODE_NONE;

}


/** \brief Set FCD frequency with kHz resolution.
  * \param nFreq The new frequency in kHz.
  * \return The FCD mode.
  *
  * This function sets the frequency of the FCD with 1 kHz resolution. The parameter
  * nFreq must already contain any necessary frequency corrention.
  *
  * \sa fcdAppSetFreq
  */
EXTERN FCD_API_EXPORT FCD_API_CALL FCD_MODE_ENUM fcdAppSetFreqKhz(int nFreq)
{
    hid_device *phd=NULL;
    unsigned char aucBufIn[65];
    unsigned char aucBufOut[65];

    phd = fcdOpen();

    if (phd == NULL)
    {
        return FCD_MODE_NONE;
    }

    // Send an App reset command
    aucBufOut[0] = 0; // Report ID. Ignored by HID Class firmware as only config'd for one report
    aucBufOut[1] = FCD_CMD_APP_SET_FREQ_KHZ;
    aucBufOut[2] = (unsigned char)nFreq;
    aucBufOut[3] = (unsigned char)(nFreq>>8);
    aucBufOut[4] = (unsigned char)(nFreq>>16);
    hid_write(phd, aucBufOut, 65);
    memset(aucBufIn, 0xCC, 65); // Clear out the response buffer
    hid_read(phd, aucBufIn, 65);

    fcdClose(phd);
    phd = NULL;

    if (aucBufIn[0]==FCD_CMD_APP_SET_FREQ_KHZ && aucBufIn[1]==1)
    {
        return FCD_MODE_APP;
    }

    return FCD_MODE_BL;
}


/** \brief Set FCD frequency with Hz resolution.
  * \param nFreq The new frequency in Hz.
  * \param rFreq The actual frequency in Hz returned by the FCD (can be NULL).
  * \return The FCD mode.
  *
  * This function sets the frequency of the FCD with 1 Hz resolution. The parameter
  * nFreq must already contain any necessary frequency corrention. If rFreq is not NULL
  * it will contain the actual frequency as returned by the API call.
  *
  * \sa fcdAppSetFreqKhz
  */
EXTERN FCD_API_EXPORT FCD_API_CALL FCD_MODE_ENUM fcdAppSetFreq(unsigned int uFreq, unsigned int *rFreq)
{
    hid_device *phd=NULL;
    unsigned char aucBufIn[65];
    unsigned char aucBufOut[65];

    phd = fcdOpen();

    if (phd == NULL)
    {
        return FCD_MODE_NONE;
    }

    // Send an App reset command
    aucBufOut[0] = 0; // Report ID. Ignored by HID Class firmware as only config'd for one report
    aucBufOut[1] = FCD_CMD_APP_SET_FREQ_HZ;
    aucBufOut[2] = (unsigned char) uFreq;
    aucBufOut[3] = (unsigned char) (uFreq >> 8);
    aucBufOut[4] = (unsigned char) (uFreq >> 16);
    aucBufOut[5] = (unsigned char) (uFreq >> 24);
    hid_write(phd, aucBufOut, 65);
    memset(aucBufIn, 0xCC, 65); // Clear out the response buffer
    hid_read(phd, aucBufIn, 65);

    fcdClose(phd);
    phd = NULL;

    if (aucBufIn[0]==FCD_CMD_APP_SET_FREQ_HZ && aucBufIn[1]==1)
    {
        if (rFreq != NULL)
        {
            *rFreq = 0;
            *rFreq = (unsigned int) aucBufIn[2];
            *rFreq += (unsigned int) (aucBufIn[3] << 8);
            *rFreq += (unsigned int) (aucBufIn[4] << 16);
            *rFreq += (unsigned int) (aucBufIn[5] << 24);
        }

        return FCD_MODE_APP;
    }

    return FCD_MODE_BL;
}

/** \brief Get current FCD frequency with Hz resolution.
  * \param rFreq The current frequency in Hz returned by the FCD.
  * \return The FCD mode.
  *
  * This function reads the frequency of the FCD with 1 Hz resolution. The parameter
  * nFreq must already contain any necessary frequency corrention.
  *
  * \sa fcdAppSetFreq
  */
EXTERN FCD_API_EXPORT FCD_API_CALL FCD_MODE_ENUM fcdAppGetFreq(unsigned int *rFreq)
{
    hid_device *phd=NULL;
    unsigned char aucBufIn[65];
    unsigned char aucBufOut[65];

    if (rFreq == NULL)
    {
        return FCD_MODE_NONE;
    }

    phd = fcdOpen();

    if (phd == NULL)
    {
        return FCD_MODE_NONE;
    }

    aucBufOut[0] = 0; // Report ID. Ignored by HID Class firmware as only config'd for one report
    aucBufOut[1] = FCD_CMD_APP_GET_FREQ_HZ;
    hid_write(phd, aucBufOut, 65);
    memset(aucBufIn, 0xCC, 65); // Clear out the response buffer
    hid_read(phd, aucBufIn, 65);

    fcdClose(phd);
    phd = NULL;

    if (aucBufIn[0]==FCD_CMD_APP_GET_FREQ_HZ && aucBufIn[1]==1)
    {
        *rFreq = 0;
        *rFreq = (unsigned int) aucBufIn[2];
        *rFreq += (unsigned int) (aucBufIn[3] << 8);
        *rFreq += (unsigned int) (aucBufIn[4] << 16);
        *rFreq += (unsigned int) (aucBufIn[5] << 24);

        return FCD_MODE_APP;
    }

    return FCD_MODE_BL;
}


/** \brief Enable/disable LNA.
  * \param enabled Whether to enable or disable the LNA (1=ON 0=OFF).
  * \return The FCD mode.
  */
EXTERN FCD_API_EXPORT FCD_API_CALL FCD_MODE_ENUM fcdAppSetLna(char enabled)
{
    hid_device *phd=NULL;
    unsigned char aucBufIn[65];
    unsigned char aucBufOut[65];

    phd = fcdOpen();

    if (phd == NULL)
    {
        return FCD_MODE_NONE;
    }

    aucBufOut[0] = 0; // Report ID. Ignored by HID Class firmware as only config'd for one report
    aucBufOut[1] = FCD_CMD_APP_SET_LNA_GAIN;
    aucBufOut[2] = (unsigned char) enabled;
    hid_write(phd, aucBufOut, 65);
    memset(aucBufIn, 0xCC, 65); // Clear out the response buffer
    hid_read(phd, aucBufIn, 65);

    fcdClose(phd);
    phd = NULL;

    return (aucBufIn[0] == FCD_CMD_APP_SET_LNA_GAIN) ? FCD_MODE_APP : FCD_MODE_BL;
}

/** \brief Get LNA status
  * \param enabled The current staus of the LNA (1=ON 0=OFF).
  * \return The FCD mode.
  */
EXTERN FCD_API_EXPORT FCD_API_CALL FCD_MODE_ENUM fcdAppGetLna(char *enabled)
{
    hid_device *phd=NULL;
    unsigned char aucBufIn[65];
    unsigned char aucBufOut[65];

    if (enabled == NULL)
        return FCD_MODE_NONE;

    phd = fcdOpen();
    if (phd == NULL)
        return FCD_MODE_NONE;

    aucBufOut[0] = 0; // Report ID. Ignored by HID Class firmware as only config'd for one report
    aucBufOut[1] = FCD_CMD_APP_GET_LNA_GAIN;
    hid_write(phd, aucBufOut, 65);
    memset(aucBufIn, 0xCC, 65); // Clear out the response buffer
    hid_read(phd, aucBufIn, 65);

    fcdClose(phd);
    phd = NULL;

    if (aucBufIn[0]==FCD_CMD_APP_GET_LNA_GAIN && aucBufIn[1]==1)
    {
        *enabled = aucBufIn[2];

        return FCD_MODE_APP;
    }

    return FCD_MODE_BL;
}


/** \brief Select RF filter.
  * \param filter The new RF filter.
  * \return The FCD mode.
  *
  * \note RF filter is selected by the FCD; using this function may not be very useful, except when
  *       firmware selects wrong filter.
  */
EXTERN FCD_API_EXPORT FCD_API_CALL FCD_MODE_ENUM fcdAppSetRfFilter(tuner_rf_filter_t filter)
{
    hid_device *phd=NULL;
    unsigned char aucBufIn[65];
    unsigned char aucBufOut[65];

    if (filter > TRFE_875_2000)
    {
        return FCD_MODE_NONE;
    }

    phd = fcdOpen();
    if (phd == NULL)
    {
        return FCD_MODE_NONE;
    }

    aucBufOut[0] = 0; // Report ID. Ignored by HID Class firmware as only config'd for one report
    aucBufOut[1] = FCD_CMD_APP_SET_RF_FILTER;
    aucBufOut[2] = (unsigned char) filter;
    hid_write(phd, aucBufOut, 65);
    memset(aucBufIn, 0xCC, 65); // Clear out the response buffer
    hid_read(phd, aucBufIn, 65);

    fcdClose(phd);
    phd = NULL;

    return (aucBufIn[0] == FCD_CMD_APP_SET_RF_FILTER) ? FCD_MODE_APP : FCD_MODE_BL;
}

/** \brief Get RF filter selection.
  * \param filter The current RF filter selection.
  * \return The FCD mode.
  */
EXTERN FCD_API_EXPORT FCD_API_CALL FCD_MODE_ENUM fcdAppGetRfFilter(tuner_rf_filter_t *filter)
{
    hid_device *phd=NULL;
    unsigned char aucBufIn[65];
    unsigned char aucBufOut[65];

    if (filter == NULL)
        return FCD_MODE_NONE;

    phd = fcdOpen();
    if (phd == NULL)
        return FCD_MODE_NONE;

    aucBufOut[0] = 0; // Report ID. Ignored by HID Class firmware as only config'd for one report
    aucBufOut[1] = FCD_CMD_APP_GET_RF_FILTER;
    hid_write(phd, aucBufOut, 65);
    memset(aucBufIn, 0xCC, 65); // Clear out the response buffer
    hid_read(phd, aucBufIn, 65);

    fcdClose(phd);
    phd = NULL;

    if (aucBufIn[0]==FCD_CMD_APP_GET_RF_FILTER && aucBufIn[1]==1)
    {
        *filter = (tuner_rf_filter_t) aucBufIn[2];

        return FCD_MODE_APP;
    }

    return FCD_MODE_BL;
}

/** \brief Enable/disable Mixer gain.
  * \param enabled Whether to enable or disable the mixer gain (1=ON 0=OFF).
  * \return The FCD mode.
  */
EXTERN FCD_API_EXPORT FCD_API_CALL FCD_MODE_ENUM fcdAppSetMixerGain(char enabled)
{
    hid_device *phd=NULL;
    unsigned char aucBufIn[65];
    unsigned char aucBufOut[65];

    phd = fcdOpen();

    if (phd == NULL)
    {
        return FCD_MODE_NONE;
    }

    aucBufOut[0] = 0; // Report ID. Ignored by HID Class firmware as only config'd for one report
    aucBufOut[1] = FCD_CMD_APP_SET_MIXER_GAIN;
    aucBufOut[2] = (unsigned char) enabled;
    hid_write(phd, aucBufOut, 65);
    memset(aucBufIn, 0xCC, 65); // Clear out the response buffer
    hid_read(phd, aucBufIn, 65);

    fcdClose(phd);
    phd = NULL;

    return (aucBufIn[0] == FCD_CMD_APP_SET_MIXER_GAIN) ? FCD_MODE_APP : FCD_MODE_BL;
}

/** \brief Get mixer gain status
  * \param enabled The current staus of the mixer gain (1=ON 0=OFF).
  * \return The FCD mode.
  */
EXTERN FCD_API_EXPORT FCD_API_CALL FCD_MODE_ENUM fcdAppGetMixerGain(char *enabled)
{
    hid_device *phd=NULL;
    unsigned char aucBufIn[65];
    unsigned char aucBufOut[65];

    if (enabled == NULL)
        return FCD_MODE_NONE;

    phd = fcdOpen();
    if (phd == NULL)
        return FCD_MODE_NONE;

    aucBufOut[0] = 0; // Report ID. Ignored by HID Class firmware as only config'd for one report
    aucBufOut[1] = FCD_CMD_APP_GET_MIXER_GAIN;
    hid_write(phd, aucBufOut, 65);
    memset(aucBufIn, 0xCC, 65); // Clear out the response buffer
    hid_read(phd, aucBufIn, 65);

    fcdClose(phd);
    phd = NULL;

    if (aucBufIn[0]==FCD_CMD_APP_GET_MIXER_GAIN && aucBufIn[1]==1)
    {
        *enabled = aucBufIn[2];

        return FCD_MODE_APP;
    }

    return FCD_MODE_BL;
}


/** \brief Set IF gain.
  * \param gain The new IF gain between 0 and 59 dB.
  * \return The FCD mode.
  */
EXTERN FCD_API_EXPORT FCD_API_CALL FCD_MODE_ENUM fcdAppSetIfGain(unsigned char gain)
{
    hid_device *phd=NULL;
    unsigned char aucBufIn[65];
    unsigned char aucBufOut[65];

    if (gain > 59)
    {
        return FCD_MODE_NONE;
    }

    phd = fcdOpen();
    if (phd == NULL)
    {
        return FCD_MODE_NONE;
    }

    aucBufOut[0] = 0; // Report ID. Ignored by HID Class firmware as only config'd for one report
    aucBufOut[1] = FCD_CMD_APP_SET_IF_GAIN;
    aucBufOut[2] = gain;
    hid_write(phd, aucBufOut, 65);
    memset(aucBufIn, 0xCC, 65); // Clear out the response buffer
    hid_read(phd, aucBufIn, 65);

    fcdClose(phd);
    phd = NULL;

    return (aucBufIn[0] == FCD_CMD_APP_SET_IF_GAIN) ? FCD_MODE_APP : FCD_MODE_BL;
}

/** \brief Get IF gain.
  * \param filter The current IF gain between 0 and 59 dB.
  * \return The FCD mode.
  */
EXTERN FCD_API_EXPORT FCD_API_CALL FCD_MODE_ENUM fcdAppGetIfGain(unsigned char *gain)
{
    hid_device *phd=NULL;
    unsigned char aucBufIn[65];
    unsigned char aucBufOut[65];

    if (gain == NULL)
        return FCD_MODE_NONE;

    phd = fcdOpen();
    if (phd == NULL)
        return FCD_MODE_NONE;

    aucBufOut[0] = 0; // Report ID. Ignored by HID Class firmware as only config'd for one report
    aucBufOut[1] = FCD_CMD_APP_GET_IF_GAIN;
    hid_write(phd, aucBufOut, 65);
    memset(aucBufIn, 0xCC, 65); // Clear out the response buffer
    hid_read(phd, aucBufIn, 65);

    fcdClose(phd);
    phd = NULL;

    if (aucBufIn[0]==FCD_CMD_APP_GET_IF_GAIN && aucBufIn[1]==1)
    {
        *gain = aucBufIn[2];

        return FCD_MODE_APP;
    }

    return FCD_MODE_BL;
}


/** \brief Select IF filter.
  * \param filter The new IF filter.
  * \return The FCD mode.
  *
  * \note IF filter is selected by the FCD; using this function may not be very useful, except when
  *       firmware selects the wrong filter.
  */
EXTERN FCD_API_EXPORT FCD_API_CALL FCD_MODE_ENUM fcdAppSetIfFilter(tuner_if_filter_t filter)
{
    hid_device *phd=NULL;
    unsigned char aucBufIn[65];
    unsigned char aucBufOut[65];

    if (filter > TIFE_8MHZ)
    {
        return FCD_MODE_NONE;
    }

    phd = fcdOpen();
    if (phd == NULL)
    {
        return FCD_MODE_NONE;
    }

    aucBufOut[0] = 0; // Report ID. Ignored by HID Class firmware as only config'd for one report
    aucBufOut[1] = FCD_CMD_APP_SET_IF_FILTER;
    aucBufOut[2] = (unsigned char) filter;
    hid_write(phd, aucBufOut, 65);
    memset(aucBufIn, 0xCC, 65); // Clear out the response buffer
    hid_read(phd, aucBufIn, 65);

    fcdClose(phd);
    phd = NULL;

    return (aucBufIn[0] == FCD_CMD_APP_SET_IF_FILTER) ? FCD_MODE_APP : FCD_MODE_BL;
}

/** \brief Get IF filter selection.
  * \param filter The current IF filter selection.
  * \return The FCD mode.
  */
EXTERN FCD_API_EXPORT FCD_API_CALL FCD_MODE_ENUM fcdAppGetIfFilter(tuner_if_filter_t *filter)
{
    hid_device *phd=NULL;
    unsigned char aucBufIn[65];
    unsigned char aucBufOut[65];

    if (filter == NULL)
        return FCD_MODE_NONE;

    phd = fcdOpen();
    if (phd == NULL)
        return FCD_MODE_NONE;

    aucBufOut[0] = 0; // Report ID. Ignored by HID Class firmware as only config'd for one report
    aucBufOut[1] = FCD_CMD_APP_GET_IF_FILTER;
    hid_write(phd, aucBufOut, 65);
    memset(aucBufIn, 0xCC, 65); // Clear out the response buffer
    hid_read(phd, aucBufIn, 65);

    fcdClose(phd);
    phd = NULL;

    if (aucBufIn[0]==FCD_CMD_APP_GET_IF_FILTER && aucBufIn[1]==1)
    {
        *filter = (tuner_if_filter_t) aucBufIn[2];

        return FCD_MODE_APP;
    }

    return FCD_MODE_BL;
}


/** \brief Enable/disable Bias T.
  * \param enabled Whether to enable or disable the Bias T (1=ON 0=OFF).
  * \return The FCD mode.
  */
EXTERN FCD_API_EXPORT FCD_API_CALL FCD_MODE_ENUM fcdAppSetBiasTee(char enabled)
{
    hid_device *phd=NULL;
    unsigned char aucBufIn[65];
    unsigned char aucBufOut[65];

    phd = fcdOpen();

    if (phd == NULL)
    {
        return FCD_MODE_NONE;
    }

    aucBufOut[0] = 0; // Report ID. Ignored by HID Class firmware as only config'd for one report
    aucBufOut[1] = FCD_CMD_APP_SET_BIAS_TEE;
    aucBufOut[2] = (unsigned char) enabled;
    hid_write(phd, aucBufOut, 65);
    memset(aucBufIn, 0xCC, 65); // Clear out the response buffer
    hid_read(phd, aucBufIn, 65);

    fcdClose(phd);
    phd = NULL;

    return (aucBufIn[0] == FCD_CMD_APP_SET_BIAS_TEE) ? FCD_MODE_APP : FCD_MODE_BL;
}

/** \brief Get Bias T status
  * \param enabled The current staus of the Bias T (1=ON 0=OFF).
  * \return The FCD mode.
  */
EXTERN FCD_API_EXPORT FCD_API_CALL FCD_MODE_ENUM fcdAppGetBiasTee(char *enabled)
{
    hid_device *phd=NULL;
    unsigned char aucBufIn[65];
    unsigned char aucBufOut[65];

    if (enabled == NULL)
        return FCD_MODE_NONE;

    phd = fcdOpen();
    if (phd == NULL)
        return FCD_MODE_NONE;

    aucBufOut[0] = 0; // Report ID. Ignored by HID Class firmware as only config'd for one report
    aucBufOut[1] = FCD_CMD_APP_GET_BIAS_TEE;
    hid_write(phd, aucBufOut, 65);
    memset(aucBufIn, 0xCC, 65); // Clear out the response buffer
    hid_read(phd, aucBufIn, 65);

    fcdClose(phd);
    phd = NULL;

    if (aucBufIn[0]==FCD_CMD_APP_GET_BIAS_TEE && aucBufIn[1]==1)
    {
        *enabled = aucBufIn[2];

        return FCD_MODE_APP;
    }

    return FCD_MODE_BL;
}