/
fmu.cpp
2119 lines (1660 loc) · 45.8 KB
/
fmu.cpp
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
/****************************************************************************
*
* Copyright (c) 2012-2015 PX4 Development Team. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
* 3. Neither the name PX4 nor the names of its contributors may be
* used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
****************************************************************************/
/**
* @file fmu.cpp
*
* Driver/configurator for the PX4 FMU multi-purpose port on v1 and v2 boards.
*/
#include <px4_config.h>
#include <sys/types.h>
#include <stdint.h>
#include <stdbool.h>
#include <stdlib.h>
#include <semaphore.h>
#include <string.h>
#include <fcntl.h>
#include <poll.h>
#include <errno.h>
#include <stdio.h>
#include <math.h>
#include <unistd.h>
#include <nuttx/arch.h>
#include <drivers/device/device.h>
#include <drivers/device/i2c.h>
#include <drivers/drv_pwm_output.h>
#include <drivers/drv_gpio.h>
#include <drivers/drv_hrt.h>
#include <board_config.h>
#include <systemlib/systemlib.h>
#include <systemlib/err.h>
#include <systemlib/mixer/mixer.h>
#include <systemlib/pwm_limit/pwm_limit.h>
#include <systemlib/board_serial.h>
#include <systemlib/param/param.h>
#include <drivers/drv_mixer.h>
#include <drivers/drv_rc_input.h>
#include <uORB/topics/actuator_controls.h>
#include <uORB/topics/actuator_controls_0.h>
#include <uORB/topics/actuator_controls_1.h>
#include <uORB/topics/actuator_controls_2.h>
#include <uORB/topics/actuator_controls_3.h>
#include <uORB/topics/actuator_outputs.h>
#include <uORB/topics/actuator_armed.h>
#include <uORB/topics/parameter_update.h>
#ifdef HRT_PPM_CHANNEL
# include <systemlib/ppm_decode.h>
#endif
/*
* This is the analog to FMU_INPUT_DROP_LIMIT_US on the IO side
*/
#define CONTROL_INPUT_DROP_LIMIT_MS 20
#define NAN_VALUE (0.0f/0.0f)
class PX4FMU : public device::CDev
{
public:
enum Mode {
MODE_NONE,
MODE_2PWM,
MODE_4PWM,
MODE_6PWM,
MODE_8PWM,
};
PX4FMU();
virtual ~PX4FMU();
virtual int ioctl(file *filp, int cmd, unsigned long arg);
virtual ssize_t write(file *filp, const char *buffer, size_t len);
virtual int init();
int set_mode(Mode mode);
int set_pwm_alt_rate(unsigned rate);
int set_pwm_alt_channels(uint32_t channels);
int set_i2c_bus_clock(unsigned bus, unsigned clock_hz);
private:
#if defined(CONFIG_ARCH_BOARD_PX4FMU_V1)
static const unsigned _max_actuators = 4;
#endif
#if defined(CONFIG_ARCH_BOARD_PX4FMU_V2) || defined(CONFIG_ARCH_BOARD_PX4FMU_V4)
static const unsigned _max_actuators = 6;
#endif
#if defined(CONFIG_ARCH_BOARD_AEROCORE)
static const unsigned _max_actuators = 8;
#endif
Mode _mode;
unsigned _pwm_default_rate;
unsigned _pwm_alt_rate;
uint32_t _pwm_alt_rate_channels;
unsigned _current_update_rate;
struct work_s _work;
int _armed_sub;
int _param_sub;
struct rc_input_values _rc_in;
orb_advert_t _to_input_rc;
orb_advert_t _outputs_pub;
unsigned _num_outputs;
int _class_instance;
volatile bool _initialized;
bool _servo_armed;
bool _pwm_on;
MixerGroup *_mixers;
uint32_t _groups_required;
uint32_t _groups_subscribed;
int _control_subs[actuator_controls_s::NUM_ACTUATOR_CONTROL_GROUPS];
actuator_controls_s _controls[actuator_controls_s::NUM_ACTUATOR_CONTROL_GROUPS];
orb_id_t _control_topics[actuator_controls_s::NUM_ACTUATOR_CONTROL_GROUPS];
pollfd _poll_fds[actuator_controls_s::NUM_ACTUATOR_CONTROL_GROUPS];
unsigned _poll_fds_num;
static pwm_limit_t _pwm_limit;
static actuator_armed_s _armed;
uint16_t _failsafe_pwm[_max_actuators];
uint16_t _disarmed_pwm[_max_actuators];
uint16_t _min_pwm[_max_actuators];
uint16_t _max_pwm[_max_actuators];
uint16_t _reverse_pwm_mask;
unsigned _num_failsafe_set;
unsigned _num_disarmed_set;
static bool arm_nothrottle() { return (_armed.prearmed && !_armed.armed); }
static void cycle_trampoline(void *arg);
void cycle();
void work_start();
void work_stop();
static int control_callback(uintptr_t handle,
uint8_t control_group,
uint8_t control_index,
float &input);
void subscribe();
int set_pwm_rate(unsigned rate_map, unsigned default_rate, unsigned alt_rate);
int pwm_ioctl(file *filp, int cmd, unsigned long arg);
void update_pwm_rev_mask();
void publish_pwm_outputs(uint16_t *values, size_t numvalues);
struct GPIOConfig {
uint32_t input;
uint32_t output;
uint32_t alt;
};
static const GPIOConfig _gpio_tab[];
static const unsigned _ngpio;
void gpio_reset(void);
void sensor_reset(int ms);
void peripheral_reset(int ms);
void gpio_set_function(uint32_t gpios, int function);
void gpio_write(uint32_t gpios, int function);
uint32_t gpio_read(void);
int gpio_ioctl(file *filp, int cmd, unsigned long arg);
/* do not allow to copy due to ptr data members */
PX4FMU(const PX4FMU &);
PX4FMU operator=(const PX4FMU &);
};
const PX4FMU::GPIOConfig PX4FMU::_gpio_tab[] = {
#if defined(CONFIG_ARCH_BOARD_PX4FMU_V1)
{GPIO_GPIO0_INPUT, GPIO_GPIO0_OUTPUT, 0},
{GPIO_GPIO1_INPUT, GPIO_GPIO1_OUTPUT, 0},
{GPIO_GPIO2_INPUT, GPIO_GPIO2_OUTPUT, GPIO_USART2_CTS_1},
{GPIO_GPIO3_INPUT, GPIO_GPIO3_OUTPUT, GPIO_USART2_RTS_1},
{GPIO_GPIO4_INPUT, GPIO_GPIO4_OUTPUT, GPIO_USART2_TX_1},
{GPIO_GPIO5_INPUT, GPIO_GPIO5_OUTPUT, GPIO_USART2_RX_1},
{GPIO_GPIO6_INPUT, GPIO_GPIO6_OUTPUT, GPIO_CAN2_TX_2},
{GPIO_GPIO7_INPUT, GPIO_GPIO7_OUTPUT, GPIO_CAN2_RX_2},
#endif
#if defined(CONFIG_ARCH_BOARD_PX4FMU_V2)
{GPIO_GPIO0_INPUT, GPIO_GPIO0_OUTPUT, 0},
{GPIO_GPIO1_INPUT, GPIO_GPIO1_OUTPUT, 0},
{GPIO_GPIO2_INPUT, GPIO_GPIO2_OUTPUT, 0},
{GPIO_GPIO3_INPUT, GPIO_GPIO3_OUTPUT, 0},
{GPIO_GPIO4_INPUT, GPIO_GPIO4_OUTPUT, 0},
{GPIO_GPIO5_INPUT, GPIO_GPIO5_OUTPUT, 0},
{0, GPIO_VDD_5V_PERIPH_EN, 0},
{0, GPIO_VDD_3V3_SENSORS_EN, 0},
{GPIO_VDD_BRICK_VALID, 0, 0},
{GPIO_VDD_SERVO_VALID, 0, 0},
{GPIO_VDD_5V_HIPOWER_OC, 0, 0},
{GPIO_VDD_5V_PERIPH_OC, 0, 0},
#endif
#if defined(CONFIG_ARCH_BOARD_PX4FMU_V4)
{GPIO_GPIO0_INPUT, GPIO_GPIO0_OUTPUT, 0},
{GPIO_GPIO1_INPUT, GPIO_GPIO1_OUTPUT, 0},
{GPIO_GPIO2_INPUT, GPIO_GPIO2_OUTPUT, 0},
{GPIO_GPIO3_INPUT, GPIO_GPIO3_OUTPUT, 0},
{GPIO_GPIO4_INPUT, GPIO_GPIO4_OUTPUT, 0},
{GPIO_GPIO5_INPUT, GPIO_GPIO5_OUTPUT, 0},
{0, GPIO_VDD_3V3_SENSORS_EN, 0},
{GPIO_VDD_BRICK_VALID, 0, 0},
#endif
#if defined(CONFIG_ARCH_BOARD_AEROCORE)
/* AeroCore breaks out User GPIOs on J11 */
{GPIO_GPIO0_INPUT, GPIO_GPIO0_OUTPUT, 0},
{GPIO_GPIO1_INPUT, GPIO_GPIO1_OUTPUT, 0},
{GPIO_GPIO3_INPUT, GPIO_GPIO3_OUTPUT, 0},
{GPIO_GPIO4_INPUT, GPIO_GPIO4_OUTPUT, 0},
{GPIO_GPIO5_INPUT, GPIO_GPIO5_OUTPUT, 0},
{GPIO_GPIO6_INPUT, GPIO_GPIO6_OUTPUT, 0},
{GPIO_GPIO7_INPUT, GPIO_GPIO7_OUTPUT, 0},
{GPIO_GPIO8_INPUT, GPIO_GPIO8_OUTPUT, 0},
{GPIO_GPIO9_INPUT, GPIO_GPIO9_OUTPUT, 0},
{GPIO_GPIO10_INPUT, GPIO_GPIO10_OUTPUT, 0},
{GPIO_GPIO11_INPUT, GPIO_GPIO11_OUTPUT, 0},
#endif
};
const unsigned PX4FMU::_ngpio = sizeof(PX4FMU::_gpio_tab) / sizeof(PX4FMU::_gpio_tab[0]);
pwm_limit_t PX4FMU::_pwm_limit;
actuator_armed_s PX4FMU::_armed = {};
namespace
{
PX4FMU *g_fmu;
} // namespace
PX4FMU::PX4FMU() :
CDev("fmu", PX4FMU_DEVICE_PATH),
_mode(MODE_NONE),
_pwm_default_rate(50),
_pwm_alt_rate(50),
_pwm_alt_rate_channels(0),
_current_update_rate(0),
_work{},
_armed_sub(-1),
_param_sub(-1),
_rc_in{},
_to_input_rc(nullptr),
_outputs_pub(nullptr),
_num_outputs(0),
_class_instance(0),
_initialized(false),
_servo_armed(false),
_pwm_on(false),
_mixers(nullptr),
_groups_required(0),
_groups_subscribed(0),
_control_subs{ -1},
_poll_fds_num(0),
_failsafe_pwm{0},
_disarmed_pwm{0},
_reverse_pwm_mask(0),
_num_failsafe_set(0),
_num_disarmed_set(0)
{
for (unsigned i = 0; i < _max_actuators; i++) {
_min_pwm[i] = PWM_DEFAULT_MIN;
_max_pwm[i] = PWM_DEFAULT_MAX;
}
_control_topics[0] = ORB_ID(actuator_controls_0);
_control_topics[1] = ORB_ID(actuator_controls_1);
_control_topics[2] = ORB_ID(actuator_controls_2);
_control_topics[3] = ORB_ID(actuator_controls_3);
memset(_controls, 0, sizeof(_controls));
memset(_poll_fds, 0, sizeof(_poll_fds));
#ifdef HRT_PPM_CHANNEL
// rc input, published to ORB
memset(&_rc_in, 0, sizeof(_rc_in));
_rc_in.input_source = input_rc_s::RC_INPUT_SOURCE_PX4FMU_PPM;
#endif
/* only enable this during development */
_debug_enabled = false;
}
PX4FMU::~PX4FMU()
{
if (_initialized) {
/* tell the task we want it to go away */
work_stop();
int i = 10;
do {
/* wait 50ms - it should wake every 100ms or so worst-case */
usleep(50000);
i--;
} while (_initialized && i > 0);
}
/* clean up the alternate device node */
unregister_class_devname(PWM_OUTPUT_BASE_DEVICE_PATH, _class_instance);
g_fmu = nullptr;
}
int
PX4FMU::init()
{
int ret;
ASSERT(!_initialized);
/* do regular cdev init */
ret = CDev::init();
if (ret != OK) {
return ret;
}
/* try to claim the generic PWM output device node as well - it's OK if we fail at this */
_class_instance = register_class_devname(PWM_OUTPUT_BASE_DEVICE_PATH);
if (_class_instance == CLASS_DEVICE_PRIMARY) {
/* lets not be too verbose */
} else if (_class_instance < 0) {
warnx("FAILED registering class device");
}
work_start();
return OK;
}
int
PX4FMU::set_mode(Mode mode)
{
/*
* Configure for PWM output.
*
* Note that regardless of the configured mode, the task is always
* listening and mixing; the mode just selects which of the channels
* are presented on the output pins.
*/
switch (mode) {
case MODE_2PWM: // v1 multi-port with flow control lines as PWM
DEVICE_DEBUG("MODE_2PWM");
/* default output rates */
_pwm_default_rate = 50;
_pwm_alt_rate = 50;
_pwm_alt_rate_channels = 0;
/* XXX magic numbers */
up_pwm_servo_init(0x3);
set_pwm_rate(_pwm_alt_rate_channels, _pwm_default_rate, _pwm_alt_rate);
break;
case MODE_4PWM: // v1 or v2 multi-port as 4 PWM outs
DEVICE_DEBUG("MODE_4PWM");
/* default output rates */
_pwm_default_rate = 50;
_pwm_alt_rate = 50;
_pwm_alt_rate_channels = 0;
/* XXX magic numbers */
up_pwm_servo_init(0xf);
set_pwm_rate(_pwm_alt_rate_channels, _pwm_default_rate, _pwm_alt_rate);
break;
case MODE_6PWM: // v2 PWMs as 6 PWM outs
DEVICE_DEBUG("MODE_6PWM");
/* default output rates */
_pwm_default_rate = 50;
_pwm_alt_rate = 50;
_pwm_alt_rate_channels = 0;
/* XXX magic numbers */
up_pwm_servo_init(0x3f);
set_pwm_rate(_pwm_alt_rate_channels, _pwm_default_rate, _pwm_alt_rate);
break;
#ifdef CONFIG_ARCH_BOARD_AEROCORE
case MODE_8PWM: // AeroCore PWMs as 8 PWM outs
DEVICE_DEBUG("MODE_8PWM");
/* default output rates */
_pwm_default_rate = 50;
_pwm_alt_rate = 50;
_pwm_alt_rate_channels = 0;
/* XXX magic numbers */
up_pwm_servo_init(0xff);
set_pwm_rate(_pwm_alt_rate_channels, _pwm_default_rate, _pwm_alt_rate);
break;
#endif
case MODE_NONE:
DEVICE_DEBUG("MODE_NONE");
_pwm_default_rate = 10; /* artificially reduced output rate */
_pwm_alt_rate = 10;
_pwm_alt_rate_channels = 0;
/* disable servo outputs - no need to set rates */
up_pwm_servo_deinit();
break;
default:
return -EINVAL;
}
_mode = mode;
return OK;
}
int
PX4FMU::set_pwm_rate(uint32_t rate_map, unsigned default_rate, unsigned alt_rate)
{
DEVICE_DEBUG("set_pwm_rate %x %u %u", rate_map, default_rate, alt_rate);
for (unsigned pass = 0; pass < 2; pass++) {
for (unsigned group = 0; group < _max_actuators; group++) {
// get the channel mask for this rate group
uint32_t mask = up_pwm_servo_get_rate_group(group);
if (mask == 0) {
continue;
}
// all channels in the group must be either default or alt-rate
uint32_t alt = rate_map & mask;
if (pass == 0) {
// preflight
if ((alt != 0) && (alt != mask)) {
warn("rate group %u mask %x bad overlap %x", group, mask, alt);
// not a legal map, bail
return -EINVAL;
}
} else {
// set it - errors here are unexpected
if (alt != 0) {
if (up_pwm_servo_set_rate_group_update(group, _pwm_alt_rate) != OK) {
warn("rate group set alt failed");
return -EINVAL;
}
} else {
if (up_pwm_servo_set_rate_group_update(group, _pwm_default_rate) != OK) {
warn("rate group set default failed");
return -EINVAL;
}
}
}
}
}
_pwm_alt_rate_channels = rate_map;
_pwm_default_rate = default_rate;
_pwm_alt_rate = alt_rate;
return OK;
}
int
PX4FMU::set_pwm_alt_rate(unsigned rate)
{
return set_pwm_rate(_pwm_alt_rate_channels, _pwm_default_rate, rate);
}
int
PX4FMU::set_pwm_alt_channels(uint32_t channels)
{
return set_pwm_rate(channels, _pwm_default_rate, _pwm_alt_rate);
}
int
PX4FMU::set_i2c_bus_clock(unsigned bus, unsigned clock_hz)
{
return device::I2C::set_bus_clock(bus, clock_hz);
}
void
PX4FMU::subscribe()
{
/* subscribe/unsubscribe to required actuator control groups */
uint32_t sub_groups = _groups_required & ~_groups_subscribed;
uint32_t unsub_groups = _groups_subscribed & ~_groups_required;
_poll_fds_num = 0;
for (unsigned i = 0; i < actuator_controls_s::NUM_ACTUATOR_CONTROL_GROUPS; i++) {
if (sub_groups & (1 << i)) {
DEVICE_DEBUG("subscribe to actuator_controls_%d", i);
_control_subs[i] = orb_subscribe(_control_topics[i]);
}
if (unsub_groups & (1 << i)) {
DEVICE_DEBUG("unsubscribe from actuator_controls_%d", i);
::close(_control_subs[i]);
_control_subs[i] = -1;
}
if (_control_subs[i] > 0) {
_poll_fds[_poll_fds_num].fd = _control_subs[i];
_poll_fds[_poll_fds_num].events = POLLIN;
_poll_fds_num++;
}
}
}
void
PX4FMU::update_pwm_rev_mask()
{
_reverse_pwm_mask = 0;
for (unsigned i = 0; i < _max_actuators; i++) {
char pname[16];
int32_t ival;
/* fill the channel reverse mask from parameters */
sprintf(pname, "PWM_AUX_REV%d", i + 1);
param_t param_h = param_find(pname);
if (param_h != PARAM_INVALID) {
param_get(param_h, &ival);
_reverse_pwm_mask |= ((int16_t)(ival != 0)) << i;
}
}
}
void
PX4FMU::publish_pwm_outputs(uint16_t *values, size_t numvalues)
{
actuator_outputs_s outputs;
outputs.noutputs = numvalues;
outputs.timestamp = hrt_absolute_time();
for (size_t i = 0; i < _max_actuators; ++i) {
outputs.output[i] = i < numvalues ? (float)values[i] : 0;
}
if (_outputs_pub == nullptr) {
int instance = -1;
_outputs_pub = orb_advertise_multi(ORB_ID(actuator_outputs), &outputs, &instance, ORB_PRIO_DEFAULT);
} else {
orb_publish(ORB_ID(actuator_outputs), _outputs_pub, &outputs);
}
}
void
PX4FMU::work_start()
{
/* schedule a cycle to start things */
work_queue(HPWORK, &_work, (worker_t)&PX4FMU::cycle_trampoline, this, 0);
}
void
PX4FMU::cycle_trampoline(void *arg)
{
PX4FMU *dev = reinterpret_cast<PX4FMU *>(arg);
dev->cycle();
}
void
PX4FMU::cycle()
{
if (!_initialized) {
/* reset GPIOs */
gpio_reset();
/* force a reset of the update rate */
_current_update_rate = 0;
_armed_sub = orb_subscribe(ORB_ID(actuator_armed));
_param_sub = orb_subscribe(ORB_ID(parameter_update));
/* initialize PWM limit lib */
pwm_limit_init(&_pwm_limit);
update_pwm_rev_mask();
_initialized = true;
}
if (_groups_subscribed != _groups_required) {
subscribe();
_groups_subscribed = _groups_required;
/* force setting update rate */
_current_update_rate = 0;
}
/*
* Adjust actuator topic update rate to keep up with
* the highest servo update rate configured.
*
* We always mix at max rate; some channels may update slower.
*/
unsigned max_rate = (_pwm_default_rate > _pwm_alt_rate) ? _pwm_default_rate : _pwm_alt_rate;
if (_current_update_rate != max_rate) {
_current_update_rate = max_rate;
int update_rate_in_ms = int(1000 / _current_update_rate);
/* reject faster than 500 Hz updates */
if (update_rate_in_ms < 2) {
update_rate_in_ms = 2;
}
/* reject slower than 10 Hz updates */
if (update_rate_in_ms > 100) {
update_rate_in_ms = 100;
}
DEVICE_DEBUG("adjusted actuator update interval to %ums", update_rate_in_ms);
for (unsigned i = 0; i < actuator_controls_s::NUM_ACTUATOR_CONTROL_GROUPS; i++) {
if (_control_subs[i] > 0) {
orb_set_interval(_control_subs[i], update_rate_in_ms);
}
}
// set to current max rate, even if we are actually checking slower/faster
_current_update_rate = max_rate;
}
/* check if anything updated */
int ret = ::poll(_poll_fds, _poll_fds_num, 0);
/* this would be bad... */
if (ret < 0) {
DEVICE_LOG("poll error %d", errno);
} else if (ret == 0) {
/* timeout: no control data, switch to failsafe values */
// warnx("no PWM: failsafe");
} else {
/* get controls for required topics */
unsigned poll_id = 0;
for (unsigned i = 0; i < actuator_controls_s::NUM_ACTUATOR_CONTROL_GROUPS; i++) {
if (_control_subs[i] > 0) {
if (_poll_fds[poll_id].revents & POLLIN) {
orb_copy(_control_topics[i], _control_subs[i], &_controls[i]);
}
poll_id++;
}
}
/* can we mix? */
if (_mixers != nullptr) {
size_t num_outputs;
switch (_mode) {
case MODE_2PWM:
num_outputs = 2;
break;
case MODE_4PWM:
num_outputs = 4;
break;
case MODE_6PWM:
num_outputs = 6;
break;
case MODE_8PWM:
num_outputs = 8;
break;
default:
num_outputs = 0;
break;
}
/* do mixing */
float outputs[_max_actuators];
num_outputs = _mixers->mix(outputs, num_outputs, NULL);
/* disable unused ports by setting their output to NaN */
for (size_t i = 0; i < sizeof(outputs) / sizeof(outputs[0]); i++) {
if (i >= num_outputs) {
outputs[i] = NAN_VALUE;
}
}
uint16_t pwm_limited[_max_actuators];
/* the PWM limit call takes care of out of band errors, NaN and constrains */
pwm_limit_calc(_servo_armed, arm_nothrottle(), num_outputs, _reverse_pwm_mask, _disarmed_pwm, _min_pwm, _max_pwm,
outputs, pwm_limited, &_pwm_limit);
/* output to the servos */
for (size_t i = 0; i < num_outputs; i++) {
up_pwm_servo_set(i, pwm_limited[i]);
}
publish_pwm_outputs(pwm_limited, num_outputs);
}
}
/* check arming state */
bool updated = false;
orb_check(_armed_sub, &updated);
if (updated) {
orb_copy(ORB_ID(actuator_armed), _armed_sub, &_armed);
/* update the armed status and check that we're not locked down */
bool set_armed = (_armed.armed || _armed.prearmed) && !_armed.lockdown;
if (_servo_armed != set_armed) {
_servo_armed = set_armed;
}
/* update PWM status if armed or if disarmed PWM values are set */
bool pwm_on = (set_armed || _num_disarmed_set > 0);
if (_pwm_on != pwm_on) {
_pwm_on = pwm_on;
up_pwm_servo_arm(pwm_on);
}
}
orb_check(_param_sub, &updated);
if (updated) {
parameter_update_s pupdate;
orb_copy(ORB_ID(parameter_update), _param_sub, &pupdate);
update_pwm_rev_mask();
}
#ifdef HRT_PPM_CHANNEL
// see if we have new PPM input data
if (ppm_last_valid_decode != _rc_in.timestamp_last_signal) {
// we have a new PPM frame. Publish it.
_rc_in.channel_count = ppm_decoded_channels;
if (_rc_in.channel_count > input_rc_s::RC_INPUT_MAX_CHANNELS) {
_rc_in.channel_count = input_rc_s::RC_INPUT_MAX_CHANNELS;
}
for (uint8_t i = 0; i < _rc_in.channel_count; i++) {
_rc_in.values[i] = ppm_buffer[i];
}
_rc_in.timestamp_publication = ppm_last_valid_decode;
_rc_in.timestamp_last_signal = ppm_last_valid_decode;
_rc_in.rc_ppm_frame_length = ppm_frame_length;
_rc_in.rssi = RC_INPUT_RSSI_MAX;
_rc_in.rc_failsafe = false;
_rc_in.rc_lost = false;
_rc_in.rc_lost_frame_count = 0;
_rc_in.rc_total_frame_count = 0;
/* lazily advertise on first publication */
if (_to_input_rc == nullptr) {
_to_input_rc = orb_advertise(ORB_ID(input_rc), &_rc_in);
} else {
orb_publish(ORB_ID(input_rc), _to_input_rc, &_rc_in);
}
}
#endif
work_queue(HPWORK, &_work, (worker_t)&PX4FMU::cycle_trampoline, this, USEC2TICK(CONTROL_INPUT_DROP_LIMIT_MS * 1000));
}
void PX4FMU::work_stop()
{
work_cancel(HPWORK, &_work);
for (unsigned i = 0; i < actuator_controls_s::NUM_ACTUATOR_CONTROL_GROUPS; i++) {
if (_control_subs[i] > 0) {
::close(_control_subs[i]);
_control_subs[i] = -1;
}
}
::close(_armed_sub);
::close(_param_sub);
/* make sure servos are off */
up_pwm_servo_deinit();
DEVICE_LOG("stopping");
/* note - someone else is responsible for restoring the GPIO config */
/* tell the dtor that we are exiting */
_initialized = false;
}
int
PX4FMU::control_callback(uintptr_t handle,
uint8_t control_group,
uint8_t control_index,
float &input)
{
const actuator_controls_s *controls = (actuator_controls_s *)handle;
input = controls[control_group].control[control_index];
/* limit control input */
if (input > 1.0f) {
input = 1.0f;
} else if (input < -1.0f) {
input = -1.0f;
}
/* motor spinup phase - lock throttle to zero */
if (_pwm_limit.state == PWM_LIMIT_STATE_RAMP) {
if (control_group == actuator_controls_s::GROUP_INDEX_ATTITUDE &&
control_index == actuator_controls_s::INDEX_THROTTLE) {
/* limit the throttle output to zero during motor spinup,
* as the motors cannot follow any demand yet
*/
input = 0.0f;
}
}
/* throttle not arming - mark throttle input as invalid */
if (arm_nothrottle()) {
if (control_group == actuator_controls_s::GROUP_INDEX_ATTITUDE &&
control_index == actuator_controls_s::INDEX_THROTTLE) {
/* set the throttle to an invalid value */
input = NAN_VALUE;
}
}
return 0;
}
int
PX4FMU::ioctl(file *filp, int cmd, unsigned long arg)
{
int ret;
/* try it as a GPIO ioctl first */
ret = gpio_ioctl(filp, cmd, arg);
if (ret != -ENOTTY) {
return ret;
}
/* if we are in valid PWM mode, try it as a PWM ioctl as well */
switch (_mode) {
case MODE_2PWM:
case MODE_4PWM:
case MODE_6PWM:
#ifdef CONFIG_ARCH_BOARD_AEROCORE
case MODE_8PWM:
#endif
ret = pwm_ioctl(filp, cmd, arg);
break;
default:
DEVICE_DEBUG("not in a PWM mode");
break;
}
/* if nobody wants it, let CDev have it */
if (ret == -ENOTTY) {
ret = CDev::ioctl(filp, cmd, arg);
}
return ret;
}
int
PX4FMU::pwm_ioctl(file *filp, int cmd, unsigned long arg)
{
int ret = OK;
lock();
switch (cmd) {
case PWM_SERVO_ARM:
up_pwm_servo_arm(true);
break;
case PWM_SERVO_SET_ARM_OK:
case PWM_SERVO_CLEAR_ARM_OK:
case PWM_SERVO_SET_FORCE_SAFETY_OFF:
case PWM_SERVO_SET_FORCE_SAFETY_ON:
// these are no-ops, as no safety switch
break;
case PWM_SERVO_DISARM:
up_pwm_servo_arm(false);
break;
case PWM_SERVO_GET_DEFAULT_UPDATE_RATE:
*(uint32_t *)arg = _pwm_default_rate;
break;
case PWM_SERVO_SET_UPDATE_RATE:
ret = set_pwm_rate(_pwm_alt_rate_channels, _pwm_default_rate, arg);
break;
case PWM_SERVO_GET_UPDATE_RATE:
*(uint32_t *)arg = _pwm_alt_rate;
break;
case PWM_SERVO_SET_SELECT_UPDATE_RATE:
ret = set_pwm_rate(arg, _pwm_default_rate, _pwm_alt_rate);
break;
case PWM_SERVO_GET_SELECT_UPDATE_RATE:
*(uint32_t *)arg = _pwm_alt_rate_channels;
break;
case PWM_SERVO_SET_FAILSAFE_PWM: {
struct pwm_output_values *pwm = (struct pwm_output_values *)arg;
/* discard if too many values are sent */
if (pwm->channel_count > _max_actuators) {
ret = -EINVAL;
break;
}
for (unsigned i = 0; i < pwm->channel_count; i++) {
if (pwm->values[i] == 0) {
/* ignore 0 */
} else if (pwm->values[i] > PWM_HIGHEST_MAX) {
_failsafe_pwm[i] = PWM_HIGHEST_MAX;
} else if (pwm->values[i] < PWM_LOWEST_MIN) {
_failsafe_pwm[i] = PWM_LOWEST_MIN;
} else {
_failsafe_pwm[i] = pwm->values[i];
}
}
/*
* update the counter
* this is needed to decide if disarmed PWM output should be turned on or not
*/
_num_failsafe_set = 0;