#include <stdio.h>
#include <stdlib.h>
#include <string.h>
+#include <time.h>
#include <errno.h>
#include <unistd.h>
#include <fcntl.h>
#include <termios.h>
+#include <sys/select.h>
+#include <sys/time.h>
+
+#define INP_BUF_SZ 256
struct sball {
int fd;
+
+ char buf[INP_BUF_SZ];
+ int len;
+
+ int (*proc_input)(struct sball *sb);
};
static int stty_sball(int fd);
static int stty_mag(int fd);
+static int proc_sball(struct sball *sb);
+static int proc_mag(struct sball *sb);
+
+static int mag_parsepkt(int id, char *data, int len);
+
+static void make_printable(char *buf, int len);
+static int read_timeout(int fd, char *buf, int bufsz, long tm_usec);
+
struct sball *sball_open(const char *dev)
{
- int fd;
+ int fd, sz;
+ char buf[128];
struct sball *sb = 0;
- if((fd = open(dev, O_RDWR | | O_NOCTTY | O_NONBLOCK)) == -1) {
+ if((fd = open(dev, O_RDWR | O_NOCTTY)) == -1) {
fprintf(stderr, "sball_open: failed to open device: %s: %s\n", dev, strerror(errno));
return 0;
}
goto err;
}
- /* set detect receiver function pointer */
+ if((sz = read_timeout(fd, buf, sizeof buf - 1, 2000000)) > 0) {
+ /* we got a response, so it's a spaceball */
+ make_printable(buf, sz);
+ printf("Spaceball detected: %s\n", buf);
+ /* TODO: improve detection, verify it's a correct reset response */
+
+ sb->proc_input = proc_sball;
+ return sb;
+ }
+
+ /* try as a magellan spacemouse */
+ if(stty_mag(fd) == -1) {
+ goto err;
+ }
+ write(fd, "vQ\r", 3);
+
+ if((sz = read_timeout(fd, buf, sizeof buf - 1, 250000)) > 0) {
+ /* we got a response, it's a magellan spacemouse */
+ make_printable(buf, sz);
+ printf("Magellan SpaceMouse detected: %s\n", buf);
+
+ /* set 3D mode, not-dominant-axis, pass through motion and button packets */
+ write(fd, "m3\r", 3);
- return sb;
+ sb->proc_input = proc_mag;
+ return sb;
+ }
err:
close(fd);
close(sb->fd);
}
+int sball_fd(struct sball *sb)
+{
+ return sb->fd;
+}
+
+int sball_read(struct sball *sb)
+{
+ int sz;
+
+ while((sz = read(sb->fd, sb->buf + sb->len, INP_BUF_SZ - sb->len - 1)) > 0) {
+ sb->len += sz;
+ sb->proc_input(sb);
+ }
+
+ /* if we fill the input buffer, make a last attempt to parse it, and discard
+ * it so we can receive more
+ */
+ if(sb->len >= INP_BUF_SZ) {
+ sb->proc_input(sb);
+ sb->len = 0;
+ }
+
+ return 0;
+}
/* Labtec spaceball: 9600 8n1 XON/XOFF */
static int stty_sball(int fd)
term.c_oflag = 0;
term.c_lflag = 0;
term.c_cc[VMIN] = 0;
- term.c_cc[VTIME] = 0;
+ term.c_cc[VTIME] = 1;
term.c_cflag = CLOCAL | CREAD | CS8 | HUPCL;
term.c_iflag = IGNBRK | IGNPAR | IXON | IXOFF;
- csetispeed(&term, B9600);
- csetospeed(&term, B9600);
+ cfsetispeed(&term, B9600);
+ cfsetospeed(&term, B9600);
if(tcsetattr(fd, TCSANOW, &term) == -1) {
perror("sball_open: tcsetattr");
term.c_oflag = 0;
term.c_lflag = 0;
term.c_cc[VMIN] = 0;
- term.c_cc[VTIME] = 0;
+ term.c_cc[VTIME] = 1;
term.c_cflag = CLOCAL | CREAD | CS8 | CSTOPB | HUPCL | CRTSCTS;
- term.c_iflag = IGNBRK | IGNPAR |;
+ term.c_iflag = IGNBRK | IGNPAR;
- csetispeed(&term, B9600);
- csetospeed(&term, B9600);
+ cfsetispeed(&term, B9600);
+ cfsetospeed(&term, B9600);
if(tcsetattr(fd, TCSANOW, &term) == -1) {
perror("sball_open: tcsetattr");
return 0;
}
+
+
+static int proc_sball(struct sball *sb)
+{
+ return -1;
+}
+
+static int proc_mag(struct sball *sb)
+{
+ int sz;
+ char *bptr = sb->buf;
+ char *start = sb->buf;
+ char *end = sb->buf + sb->len;
+
+ /* see if we have a CR in the buffer */
+ while(bptr < end) {
+ if(*bptr == '\r') {
+ *bptr = 0;
+ mag_parsepkt(*start, start + 1, bptr - start - 1);
+ start = ++bptr;
+ } else {
+ bptr++;
+ }
+ }
+
+ sz = start - sb->buf;
+ if(sz > 0) {
+ memmove(sb->buf, start, sz);
+ sb->len -= sz;
+ }
+ return 0;
+}
+
+static int mag_parsepkt(int id, char *data, int len)
+{
+ int i, mot[6];
+ unsigned int keystate;
+
+ /*printf("magellan packet: %c - %s (%d bytes)\n", (char)id, data, len);*/
+
+ switch(id) {
+ case 'd':
+ if(len != 24) {
+ fprintf(stderr, "magellan: invalid data packet, expected 24 bytes, got: %d\n", len);
+ return -1;
+ }
+ for(i=0; i<6; i++) {
+ mot[i] = ((((int)data[0] & 0xf) << 12) | (((int)data[1] & 0xf) << 8) |
+ (((int)data[2] & 0xf) << 4) | (data[3] & 0xf)) - 0x8000;
+ data += 4;
+ }
+ printf("motion: T %+4d %+4d %+4d R %+4d %+4d %+4d\n", mot[0], mot[1], mot[2], mot[3], mot[4], mot[5]);
+ break;
+
+ case 'k':
+ if(len != 3) {
+ fprintf(stderr, "magellan: invalid keyboard pakcet, expected 3 bytes, got: %d\n", len);
+ return -1;
+ }
+ keystate = (data[0] & 0xf) | ((data[1] & 0xf) << 4) | (((unsigned int)data[2] & 0xf) << 8);
+ printf("keystate: ");
+ for(i=0; i<12; i++) {
+ int b = 11 - i;
+ int hex = b < 10 ? b + '0' : b - 10 + 'a';
+ putchar(keystate & (1 << b) ? hex : '-');
+ }
+ putchar('\n');
+ break;
+
+ case 'e':
+ if(data[0] == 1) {
+ fprintf(stderr, "magellan error: illegal command: %c%c\n", data[1], data[2]);
+ } else if(data[0] == 2) {
+ fprintf(stderr, "magellan error: framing error\n");
+ } else {
+ fprintf(stderr, "magellan error: unknown device error\n");
+ }
+ return -1;
+
+ default:
+ break;
+ }
+ return 0;
+}
+
+static void make_printable(char *buf, int len)
+{
+ int i, c;
+ char *wr = buf;
+
+ for(i=0; i<len; i++) {
+ c = *buf++;
+ if(c == '\r') {
+ *wr++ = '\n';
+ if(*buf == '\n') buf++;
+ } else {
+ *wr++ = c;
+ }
+ }
+ *wr = 0;
+}
+
+static int read_timeout(int fd, char *buf, int bufsz, long tm_usec)
+{
+ int res;
+ long usec, sz = 0;
+ struct timeval tv0, tv;
+ fd_set rdset;
+
+ if(!buf || bufsz <= 0) return -1;
+
+ usec = tm_usec;
+ gettimeofday(&tv0, 0);
+
+ while(sz < bufsz && usec > 0) {
+ tv.tv_sec = usec / 1000000;
+ tv.tv_usec = usec % 1000000;
+
+ FD_ZERO(&rdset);
+ FD_SET(fd, &rdset);
+ if((res = select(fd + 1, &rdset, 0, 0, &tv)) > 0 && FD_ISSET(fd, &rdset)) {
+ sz += read(fd, buf + sz, bufsz - sz);
+ buf[sz] = 0;
+ tm_usec = usec = 128000; /* wait 128ms for the rest of the message to appear */
+ gettimeofday(&tv0, 0);
+ continue;
+ }
+ if(res == -1 && (errno == EWOULDBLOCK || errno == EAGAIN)) {
+ break;
+ }
+ gettimeofday(&tv, 0);
+ usec = tm_usec - ((tv.tv_sec - tv0.tv_sec) * 1000000 + (tv.tv_usec - tv0.tv_usec));
+ }
+
+ return sz > 0 ? sz : -1;
+}
+
projects / sball / blobdiff