11 #include <sys/select.h>
14 #define INP_BUF_SZ 256
29 int (*parse)(struct sball*, int, char*, int);
32 static int stty_sball(int fd);
33 static int stty_mag(int fd);
35 static int proc_input(struct sball *sb);
37 static int mag_parsepkt(struct sball *sb, int id, char *data, int len);
38 static int sball_parsepkt(struct sball *sb, int id, char *data, int len);
40 static int guess_num_buttons(const char *verstr);
42 static void make_printable(char *buf, int len);
43 static int read_timeout(int fd, char *buf, int bufsz, long tm_usec);
45 struct sball *sball_open(const char *dev)
51 if((fd = open(dev, O_RDWR | O_NOCTTY)) == -1) {
52 fprintf(stderr, "sball_open: failed to open device: %s: %s\n", dev, strerror(errno));
56 if(!(sb = malloc(sizeof *sb))) {
57 fprintf(stderr, "sball_open: failed to allocate sball object\n");
64 if(stty_sball(fd) == -1) {
68 if((sz = read_timeout(fd, buf, sizeof buf - 1, 2000000)) > 0 && memcmp(buf, "\r@1", 3) == 0) {
69 /* we got a response, so it's a spaceball */
70 make_printable(buf, sz);
71 printf("Spaceball detected: %s\n", buf);
73 sb->nbuttons = guess_num_buttons(buf);
74 printf("%d buttons\n", sb->nbuttons);
76 /* set binary mode and enable automatic data packet sending */
77 write(fd, "\rCB\rMSS\r", 8);
79 sb->parse = sball_parsepkt;
83 /* try as a magellan spacemouse */
84 if(stty_mag(fd) == -1) {
89 if((sz = read_timeout(fd, buf, sizeof buf - 1, 250000)) > 0 && buf[0] == 'v') {
90 make_printable(buf, sz);
91 printf("Magellan SpaceMouse detected: %s\n", buf);
93 sb->nbuttons = guess_num_buttons(buf);
94 printf("%d buttons\n", sb->nbuttons);
96 /* set 3D mode, not-dominant-axis, pass through motion and button packets */
99 sb->parse = mag_parsepkt;
109 void sball_close(struct sball *sb)
115 int sball_fd(struct sball *sb)
120 int sball_read(struct sball *sb)
124 while((sz = read(sb->fd, sb->buf + sb->len, INP_BUF_SZ - sb->len - 1)) > 0) {
129 /* if we fill the input buffer, make a last attempt to parse it, and discard
130 * it so we can receive more
132 if(sb->len >= INP_BUF_SZ) {
140 /* Labtec spaceball: 9600 8n1 XON/XOFF */
141 static int stty_sball(int fd)
145 if(tcgetattr(fd, &term) == -1) {
146 perror("sball_open: tcgetattr");
153 term.c_cc[VTIME] = 1;
155 term.c_cflag = CLOCAL | CREAD | CS8 | HUPCL;
156 term.c_iflag = IGNBRK | IGNPAR | IXON | IXOFF;
158 cfsetispeed(&term, B9600);
159 cfsetospeed(&term, B9600);
161 if(tcsetattr(fd, TCSANOW, &term) == -1) {
162 perror("sball_open: tcsetattr");
169 /* Logicad magellan spacemouse: 9600 8n2 CTS/RTS */
170 static int stty_mag(int fd)
174 if(tcgetattr(fd, &term) == -1) {
175 perror("sball_open: tcgetattr");
182 term.c_cc[VTIME] = 1;
184 term.c_cflag = CLOCAL | CREAD | CS8 | CSTOPB | HUPCL | CRTSCTS;
185 term.c_iflag = IGNBRK | IGNPAR;
187 cfsetispeed(&term, B9600);
188 cfsetospeed(&term, B9600);
190 if(tcsetattr(fd, TCSANOW, &term) == -1) {
191 perror("sball_open: tcsetattr");
199 static int proc_input(struct sball *sb)
202 char *bptr = sb->buf;
203 char *start = sb->buf;
204 char *end = sb->buf + sb->len;
206 /* see if we have a CR in the buffer */
210 sb->parse(sb, *start, start + 1, bptr - start - 1);
217 sz = start - sb->buf;
219 memmove(sb->buf, start, sz);
225 static void print_keystate(unsigned int keystate)
229 printf("keystate: ");
230 for(i=0; i<12; i++) {
232 int hex = b < 10 ? b + '0' : b - 10 + 'a';
233 putchar(keystate & (1 << b) ? hex : '-');
238 static int mag_parsepkt(struct sball *sb, int id, char *data, int len)
241 unsigned int keystate;
243 /*printf("magellan packet: %c - %s (%d bytes)\n", (char)id, data, len);*/
248 fprintf(stderr, "magellan: invalid data packet, expected 24 bytes, got: %d\n", len);
252 mot[i] = ((((int)data[0] & 0xf) << 12) | (((int)data[1] & 0xf) << 8) |
253 (((int)data[2] & 0xf) << 4) | (data[3] & 0xf)) - 0x8000;
256 printf("motion: T %+4d %+4d %+4d R %+4d %+4d %+4d\n", mot[0], mot[1], mot[2], mot[3], mot[4], mot[5]);
261 fprintf(stderr, "magellan: invalid keyboard pakcet, expected 3 bytes, got: %d\n", len);
264 keystate = (data[0] & 0xf) | ((data[1] & 0xf) << 4) | (((unsigned int)data[2] & 0xf) << 8);
265 print_keystate(keystate);
270 fprintf(stderr, "magellan error: illegal command: %c%c\n", data[1], data[2]);
271 } else if(data[0] == 2) {
272 fprintf(stderr, "magellan error: framing error\n");
274 fprintf(stderr, "magellan error: unknown device error\n");
284 static int sball_parsepkt(struct sball *sb, int id, char *data, int len)
287 unsigned int keystate;
291 /* decode data packet, replacing escaped values with the correct ones */
293 while(rd < data + len) {
294 if((c = *rd++) == '^') {
297 *wr++ = 0x11; /* XON */
300 *wr++ = 0x13; /* XOFF */
308 fprintf(stderr, "sball decode: ignoring invalid escape code: %xh\n", (unsigned int)c);
314 len = wr - data; /* update the decoded length */
319 fprintf(stderr, "sball: invalid data packet, expected 14 bytes, got: %d\n", len);
323 mot = (short*)(data + 2); /* skip the period */
324 printf("motion: T %+6d %+6d %+6d R %+6d %+6d %+6d\n", mot[0], mot[1], mot[2], mot[3], mot[4], mot[5]);
329 fprintf(stderr, "sball: invalid key packet, expected 2 bytes, got: %d\n", len);
332 if(sb->flags & SB4000) break; /* ignore K packets from spaceball 4000 devices */
334 /* data[1] bits 0-3 -> buttons 0,1,2,3
335 * data[1] bits 4,5 (3003 L/R) -> buttons 0, 1
336 * data[0] bits 0-2 -> buttons 4,5,6
337 * data[0] bit 4 is (2003 pick) -> button 7
339 keystate = (data[1] & 0xf) | ((data[1] >> 4) & 3) | ((data[0] & 7) << 4) |
340 ((data[0] & 0x10) >> 1);
341 print_keystate(keystate);
346 fprintf(stderr, "sball: invalid sb4k key packet, expected 2 bytes, got: %d\n", len);
349 /* spaceball 4000 key packet */
351 /* update orientation flag */
355 sb->flags &= ~FLIPXY;
358 /* data[1] bits 0-5 -> buttons 0,1,2,3,4,5
359 * data[1] bit 7 -> button 6
360 * data[0] bits 0-4 -> buttons 7,8,9,10,11
362 keystate = (data[1] & 0x3f) | ((data[1] & 0x80) >> 1) | ((data[0] & 0x1f) << 7);
363 print_keystate(keystate);
367 fprintf(stderr, "sball: error:");
368 for(i=0; i<len; i++) {
369 if(isprint(data[i])) {
370 fprintf(stderr, " %c", data[i]);
372 fprintf(stderr, " %02xh", (unsigned int)data[i]);
379 fprintf(stderr, "sball: got '%c' packet:", (char)id);
380 for(i=0; i<len; i++) {
381 fprintf(stderr, " %02x", (unsigned int)data[i]);
388 static int guess_num_buttons(const char *verstr)
391 const char *s, *model;
393 if((s = strstr(verstr, "Firmware version"))) { /* spaceball */
395 /* if we got a model number, guess based on that */
396 if((model = strchr(s, '('))) {
397 if(memcmp(model, "(Model ", 7) == 0) {
402 switch(atoi(model)) {
413 /* try to guess based on firmware number */
414 if(sscanf(s + 17, "%d.%d", &major, &minor) == 2 && major == 2) {
415 if(minor == 35 || minor == 62 || minor == 63) {
416 return 2; /* spaceball 3003/3003C */
418 if(minor == 42 || minor == 43 || minor == 45) {
419 /* 2.42 is also used by spaceball 2003C, but this should be
420 * caught before we get here by the model number guess
422 return 12; /* spaceball 4000flx/5000flx-a */
424 if(minor == 2 || minor == 13 || minor == 15) {
425 return 8; /* spaceball 1003/2003/2003c */
430 if(strstr(verstr, "MAGELLAN Version")) {
431 return 9; /* magellan spacemouse */
434 if(strstr(verstr, "SPACEBALL Version")) {
435 return 12; /* spaceball 5000 */
438 if(strstr(verstr, "CadMan Version")) {
442 fprintf(stderr, "Can't guess number of buttons, default to 8, report this as a bug!\n");
446 static void make_printable(char *buf, int len)
451 for(i=0; i<len; i++) {
455 while(*buf == '\n' || *buf == '\r') buf++;
463 static int read_timeout(int fd, char *buf, int bufsz, long tm_usec)
467 struct timeval tv0, tv;
470 if(!buf || bufsz <= 0) return -1;
473 gettimeofday(&tv0, 0);
475 while(sz < bufsz && usec > 0) {
476 tv.tv_sec = usec / 1000000;
477 tv.tv_usec = usec % 1000000;
481 if((res = select(fd + 1, &rdset, 0, 0, &tv)) > 0 && FD_ISSET(fd, &rdset)) {
482 sz += read(fd, buf + sz, bufsz - sz);
484 tm_usec = usec = 128000; /* wait 128ms for the rest of the message to appear */
485 gettimeofday(&tv0, 0);
488 if(res == -1 && (errno == EWOULDBLOCK || errno == EAGAIN)) {
491 gettimeofday(&tv, 0);
492 usec = tm_usec - ((tv.tv_sec - tv0.tv_sec) * 1000000 + (tv.tv_usec - tv0.tv_usec));
495 return sz > 0 ? sz : -1;