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
|
/*
Instru2Light - Illumine un instrument de musique en temps réel
Copyright (C) 2012 Ludovic Pouzenc <lpouzenc@gmail.com>
This program 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.
This program 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 this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <ftdi.h>
#include <time.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <math.h>
#include "illuminate.h"
// FTDI Vendor ID
#define VID 0x0403
// FTDI Product ID
#define PID 0x6001
#define DMX_CHANNELS 6
//#define DMX_CHANNELS 512
//#define DMX_FRAMETIME 24000000
#define DMX_FRAMETIME 0
#define DMX_BREAK 110000
#define DMX_MAB 16000
#define MAX_STR 64
/*
struct ftdi_device_list
{
// pointer to next entry
struct ftdi_device_list *next;
// pointer to libusb's usb_device
struct usb_device *dev;
}
*/
inline void ts_diffadd(struct timespec *res, struct timespec *a, struct timespec *b, struct timespec *c);
void e(int res, const char *funcname, struct ftdi_context *ftdi, int exit_val);
int dmx_universe_write(struct ftdi_context *ftdi, unsigned char *universe, int uni_len);
struct ftdi_context ftdi;
struct ftdi_device_list *devlist=NULL;
char *manufacturer, *description, *serial;
unsigned char universe[DMX_CHANNELS+1];
int dmx_init() {
struct usb_device *dev=NULL;
struct timespec ts_to_sleep;
(void) memset(universe, 0, sizeof(universe));
(void) memset(&ftdi, 0, sizeof(ftdi));
manufacturer=malloc(MAX_STR);
description=malloc(MAX_STR);
serial=malloc(MAX_STR);
e(ftdi_init(&ftdi),"ftdi_init",&ftdi,10);
e(ftdi_usb_find_all(&ftdi, &devlist, VID, PID),"ftdi_usb_find_all",&ftdi,11);
//Always take the first device
if (devlist==NULL || devlist->dev==NULL) {
fprintf(stderr, "No usb device detected (looking for USB ID 0x%04X:0x%04X)\n", VID, PID);
return(2);
}
dev=devlist->dev;
// fprintf(stderr, "DEBUG : next==%p\n", devlist->next);
e(ftdi_usb_get_strings(&ftdi, dev, manufacturer, MAX_STR, description, MAX_STR, serial, MAX_STR),"ftdi_usb_get_strings",&ftdi,12);
fprintf(stderr, "Connecting to USB device ('%s','%s','%s')\n", manufacturer, description, serial);
e(ftdi_usb_open_dev(&ftdi,dev),"ftdi_usb_open_dev",&ftdi,13);
fprintf(stderr, "Connected\n");
//Init the device
e(ftdi_usb_reset(&ftdi),"ftdi_usb_reset",&ftdi,15);
e(ftdi_set_baudrate(&ftdi, 250000),"ftdi_set_baudrate",&ftdi,16);
e(ftdi_set_line_property(&ftdi, BITS_8, STOP_BIT_2, NONE),"ftdi_set_line_property",&ftdi,17);
e(ftdi_setflowctrl(&ftdi, SIO_DISABLE_FLOW_CTRL),"ftdi_setflowctrl",&ftdi,18);
e(ftdi_usb_purge_buffers(&ftdi),"ftdi_usb_purge_buffers",&ftdi,19);
e(ftdi_setrts(&ftdi, 0),"ftdi_setrts",&ftdi,20);
// 1ms pause for initialization completion
ts_to_sleep.tv_sec=0;
ts_to_sleep.tv_nsec=1000000;
nanosleep(&ts_to_sleep,NULL);
return 0;
}
inline int projector_correction(int in) {
//int out=powf(((in-108.f)/162.f),3.f)*256.f+80.f;
int out=in*0.25f+0.75*(powf(((in-100.f)/162.f),3.f)*256.f+48.f);
if (out>255) out=255;
if (out<0) out=0;
return out;
}
int dmx_write_rgb(int r, int g, int b) {
if (! ftdi.usb_dev ) return -1;
universe[2]=projector_correction(r);
universe[3]=projector_correction(g);
universe[4]=projector_correction(b);
// printf("rgb %3i %3i %3i dmx %3i %3i %3i\n", r,g,b, universe[2], universe[3], universe[4]);
return dmx_universe_write(&ftdi, universe, DMX_CHANNELS);
}
void dmx_deinit() {
e(ftdi_usb_close(&ftdi),"ftdi_usb_close",&ftdi,50);
ftdi_list_free(&devlist);
ftdi_deinit(&ftdi);
free(manufacturer);
free(description);
free(serial);
}
int dmx_universe_write(struct ftdi_context *ftdi, unsigned char *universe, int uni_len) {
//static struct timespec ts_frame_time={0,DMX_FRAMETIME};
static struct timespec ts_dmx_break={0,DMX_BREAK};
static struct timespec ts_dmx_mab={0,DMX_MAB};
//static struct timespec ts_trame_begin={0,0};
//struct timespec ts_to_sleep, ts_now;
// http://www.opendmx.net/index.php/DMX512-A#Timings
// http://www.erwinrol.com/?s=dmx
// symbo_perdiod is 4us (250kHz)
// Full packet minimal timing : DMX_BREAK+DMX_MAB+(1+8+2)*513*symbol_period=22698us
ftdi_async_complete(ftdi,0);
// Wait the end of the previous timeslot
/*
clock_gettime(CLOCK_MONOTONIC, &ts_now);
ts_diffadd(&ts_to_sleep,&ts_frame_time,&ts_now,&ts_trame_begin);
//fprintf(stderr, "DEBUG : ts_to_sleep==%li.%09li\n", ts_to_sleep.tv_sec, ts_to_sleep.tv_nsec);
// ts_to_sleep.tv_sec=0;
// ts_to_sleep.tv_nsec=23000000;
nanosleep(&ts_to_sleep,NULL);
clock_gettime(CLOCK_MONOTONIC, &ts_trame_begin);
*/
e(ftdi_set_line_property2(ftdi, BITS_8, STOP_BIT_2, NONE, BREAK_ON),"ftdi_set_line_property2",ftdi,30);
nanosleep(&ts_dmx_break,NULL);
e(ftdi_set_line_property2(ftdi, BITS_8, STOP_BIT_2, NONE, BREAK_OFF),"ftdi_set_line_property2",ftdi,31);
nanosleep(&ts_dmx_mab,NULL);
//return ftdi_write_data(ftdi, universe, uni_len);
return ftdi_write_data_async(ftdi, universe, uni_len);
}
inline void ts_diffadd(struct timespec *res, struct timespec *a, struct timespec *b, struct timespec *c) {
time_t rem;
res->tv_nsec=a->tv_nsec-b->tv_nsec+c->tv_nsec;
rem=res->tv_nsec/1000000000;
res->tv_nsec=res->tv_nsec%1000000000;
res->tv_sec=a->tv_sec-b->tv_sec+c->tv_sec+rem;
if (res->tv_nsec<0 && res->tv_sec>0) { res->tv_sec--; res->tv_nsec+=1000000000; }
if (res->tv_nsec>0 && res->tv_sec<0) { res->tv_nsec-=1000000000; res->tv_sec++; }
}
void e(int res, const char *funcname, struct ftdi_context *ftdi, int exit_val) {
char *reason;
if ( res < 0 ) {
reason=ftdi_get_error_string(ftdi);
fprintf(stderr, "Error in %s : %s\n", funcname, reason);
exit(exit_val);
}
}
|
