#include "linuxhid.h" #define LINUXJOYSTICK_DEVICE "/dev/input/event0" #define LINUXJOYSTICK_AXES 6 static char *version = "$Revision: 1.2 $"; /*------------------------------------------------------------------------------ * CLASS DEF */ static t_class *linuxjoystick_class; typedef struct _linuxjoystick { t_object x_obj; t_int x_fd; t_symbol* x_devname; int read_ok; int started; struct input_event x_input_event; t_outlet *x_axis_out[LINUXJOYSTICK_AXES]; t_outlet *x_button_num_out; t_outlet *x_button_val_out; t_clock *x_clock; unsigned char x_buttons; unsigned char x_axes; } t_linuxjoystick; /*------------------------------------------------------------------------------ * IMPLEMENTATION */ //DONE static int linuxjoystick_close(t_linuxjoystick *x) { DEBUG(post("linuxjoystick_close");) if (x->x_fd <0) return 0; close (x->x_fd); return 1; } //DONE static int linuxjoystick_open(t_linuxjoystick *x,t_symbol* s) { int eventType, eventCode; unsigned long bitmask[EV_MAX][NBITS(KEY_MAX)]; char devicename[256] = "Unknown"; DEBUG(post("linuxjoystick_open");) linuxjoystick_close(x); /* set obj device name to parameter * otherwise set to default */ if (s != &s_) x->x_devname = s; else { post("You need to set a input device (i.e /dev/input/event0)"); } /* open device */ if (x->x_devname) { post("opening ..."); /* open the linuxjoystick device read-only, non-exclusive */ x->x_fd = open (x->x_devname->s_name, O_RDONLY | O_NONBLOCK); if (x->x_fd >= 0 ) post("done"); else post("failed"); } else { return 1; } /* test if device open */ if (x->x_fd >= 0) post("%s opened",x->x_devname->s_name); else { post("unable to open %s",x->x_devname->s_name); x->x_fd = -1; return 0; } /* read input_events from the LINUXJOYSTICK_DEVICE stream * It seems that is just there to flush the event input buffer? */ while (read (x->x_fd, &(x->x_input_event), sizeof(struct input_event)) > -1); /* get name of device */ ioctl(x->x_fd, EVIOCGNAME(sizeof(devicename)), devicename); post ("configuring %s",devicename); /* get bitmask representing supported events (axes, buttons, etc.) */ memset(bitmask, 0, sizeof(bitmask)); ioctl(x->x_fd, EVIOCGBIT(0, EV_MAX), bitmask[0]); post("Supported events:"); x->x_axes = 0; x->x_buttons = 0; /* cycle through all possible event types */ for (eventType = 0; eventType < EV_MAX; eventType++) { if (test_bit(eventType, bitmask[0])) { post(" %s (type %d) ", events[eventType] ? events[eventType] : "?", eventType); // post("Event type %d",eventType); /* get bitmask representing supported button types */ ioctl(x->x_fd, EVIOCGBIT(eventType, KEY_MAX), bitmask[eventType]); /* cycle through all possible event codes (axes, keys, etc.) * testing to see which are supported */ for (eventCode = 0; eventCode < KEY_MAX; eventCode++) if (test_bit(eventCode, bitmask[eventType])) { post(" Event code %d (%s)", eventCode, names[eventType] ? (names[eventType][eventCode] ? names[eventType][eventCode] : "?") : "?"); if ( eventType == EV_KEY ) x->x_buttons++; else if ( eventType == EV_ABS ) x->x_axes++; } } } post ("\nUsing %d axes and %d buttons.", x->x_axes, x->x_buttons); post ("WARNING * WARNING * WARNING * WARNING * WARNING * WARNING * WARNING"); post ("This object is under development! The interface could change at anytime!"); post ("As I write cross-platform versions, the interface might have to change."); post ("WARNING * WARNING * WARNING * WARNING * WARNING * WARNING * WARNING"); return 1; } static int linuxjoystick_read(t_linuxjoystick *x,int fd) { int readBytes; int axis_num = 0; t_float button_num = 0; if (x->x_fd < 0) return 0; if (x->read_ok) { readBytes = read(x->x_fd, &(x->x_input_event), sizeof(struct input_event)); DEBUG(post("reading %d",readBytes);) if ( readBytes < 0 ) { post("linuxjoystick: read failed"); x->read_ok = 0; return 0; } } if ( x->x_input_event.type == EV_KEY ) { /* key/button event type */ switch ( x->x_input_event.code ) { case BTN_0: button_num = 0; break; case BTN_1: button_num = 1; break; case BTN_2: button_num = 2; break; case BTN_3: button_num = 3; break; case BTN_4: button_num = 4; break; case BTN_5: button_num = 5; break; case BTN_6: button_num = 6; break; case BTN_7: button_num = 7; break; case BTN_8: button_num = 8; break; case BTN_9: button_num = 9; break; case BTN_TRIGGER: button_num = 10; break; case BTN_THUMB: button_num = 11; break; case BTN_THUMB2: button_num = 12; break; case BTN_TOP: button_num = 13; break; case BTN_TOP2: button_num = 14; break; case BTN_PINKIE: button_num = 15; break; case BTN_BASE: button_num = 16; break; case BTN_BASE2: button_num = 17; break; case BTN_BASE3: button_num = 18; break; case BTN_BASE4: button_num = 19; break; case BTN_BASE5: button_num = 20; break; case BTN_BASE6: button_num = 21; break; } outlet_float (x->x_button_val_out, x->x_input_event.value); outlet_float (x->x_button_num_out, button_num); } else if ( x->x_input_event.type == EV_ABS ) { /* Relative Axes Event Type */ switch ( x->x_input_event.code ) { case ABS_X: axis_num = 0; break; case ABS_Y: axis_num = 1; break; case ABS_Z: axis_num = 2; break; case ABS_HAT0X: axis_num = 3; break; case ABS_HAT0Y: axis_num = 4; break; case ABS_THROTTLE: axis_num = 5; break; } outlet_float (x->x_axis_out[axis_num], (int)x->x_input_event.value); } return 1; } /* Actions */ static void linuxjoystick_bang(t_linuxjoystick* x) { DEBUG(post("linuxjoystick_bang");) } static void linuxjoystick_float(t_linuxjoystick* x) { DEBUG(post("linuxjoystick_float");) } // DONE void linuxjoystick_start(t_linuxjoystick* x) { DEBUG(post("linuxjoystick_start");) if (x->x_fd >= 0 && !x->started) { sys_addpollfn(x->x_fd, (t_fdpollfn)linuxjoystick_read, x); post("linuxjoystick: start"); x->started = 1; } } // DONE void linuxjoystick_stop(t_linuxjoystick* x) { DEBUG(post("linuxjoystick_stop");) if (x->x_fd >= 0 && x->started) { sys_rmpollfn(x->x_fd); post("linuxjoystick: stop"); x->started = 0; } } /* Misc setup functions */ static void linuxjoystick_free(t_linuxjoystick* x) { DEBUG(post("linuxjoystick_free");) if (x->x_fd < 0) return; linuxjoystick_stop(x); close (x->x_fd); } static void *linuxjoystick_new(t_symbol *s) { int i; t_linuxjoystick *x = (t_linuxjoystick *)pd_new(linuxjoystick_class); DEBUG(post("linuxjoystick_new");) /* init vars */ x->x_fd = -1; x->read_ok = 1; x->started = 0; /* create outlets for each axis */ for (i = 0; i < LINUXJOYSTICK_AXES; i++) x->x_axis_out[i] = outlet_new(&x->x_obj, &s_float); /* create outlets for buttons */ x->x_button_num_out = outlet_new(&x->x_obj, &s_float); x->x_button_val_out = outlet_new(&x->x_obj, &s_float); if (s != &s_) x->x_devname = s; /* Open the device and save settings */ if (!linuxjoystick_open(x,s)) return x; return (x); } void linuxjoystick_setup(void) { DEBUG(post("linuxjoystick_setup");) linuxjoystick_class = class_new(gensym("linuxjoystick"), (t_newmethod)linuxjoystick_new, (t_method)linuxjoystick_free, sizeof(t_linuxjoystick),0,A_DEFSYM,0); /* add inlet datatype methods */ class_addfloat(linuxjoystick_class,(t_method) linuxjoystick_float); class_addbang(linuxjoystick_class,(t_method) linuxjoystick_bang); /* add inlet message methods */ class_addmethod(linuxjoystick_class, (t_method) linuxjoystick_open,gensym("open"),A_DEFSYM); class_addmethod(linuxjoystick_class,(t_method) linuxjoystick_close,gensym("close"),0); class_addmethod(linuxjoystick_class,(t_method) linuxjoystick_start,gensym("start"),0); class_addmethod(linuxjoystick_class,(t_method) linuxjoystick_stop,gensym("stop"),0); }