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/*
uDMX.c
pd-Interface to the [ a n y m a | uDMX - Open Source USB Sensor Box ]
Authors: Michael Egger
Copyright: 2007 [ a n y m a ]
Website: www.anyma.ch
License: GNU GPL 2.0 www.gnu.org
Version: 0.2 2009-06-30
0.1 2007-01-28
*/
#include "m_pd.h"
#include "uDMX_cmds.h"
#include <stdio.h>
#include <math.h>
#include <stdlib.h>
#include <string.h>
#include <usb.h> /* this is libusb, see http://libusb.sourceforge.net/ */
#define USBDEV_SHARED_VENDOR 0x16C0 /* VOTI */
#define USBDEV_SHARED_PRODUCT 0x05DC /* Obdev's free shared PID */
typedef struct _uDMX // defines our object's internal variables for each instance in a patch
{
t_object p_ob; // object header - ALL objects MUST begin with this...
usb_dev_handle *dev_handle; // handle to the uDMX usb device
int debug_flag;
int channel; // int value - received from the right inlet and stored internally for each object instance
} t_uDMX;
void *uDMX_class; // global pointer to the object class - so max can reference the object
// these are prototypes for the methods that are defined below
void uDMX_int(t_uDMX *x, long n);
void uDMX_setchannel(t_uDMX *x, t_floatarg f);
void uDMX_debug(t_uDMX *x, t_symbol *s, short ac, t_atom *av);
void uDMX_list(t_uDMX *x, t_symbol *s, short ac, t_atom *av);
void uDMX_open(t_uDMX *x);
void uDMX_close(t_uDMX *x);
void *uDMX_new(long n);
static int usbGetStringAscii(usb_dev_handle *dev, int dex, int langid, char *buf, int buflen);
void find_device(t_uDMX *x);
//--------------------------------------------------------------------------
void uDMX_setup(void)
{
uDMX_class = class_new ( gensym("uDMX"),(t_newmethod)uDMX_new, 0, sizeof(t_uDMX), CLASS_DEFAULT,0);
class_addfloat(uDMX_class, (t_method)uDMX_int); // the method for an int in the left inlet (inlet 0)
class_addmethod(uDMX_class, (t_method)uDMX_debug,gensym("debug"), A_GIMME, 0);
class_addlist(uDMX_class, (t_method)uDMX_list);
class_addmethod(uDMX_class, (t_method)uDMX_open, gensym("open"), 0);
class_addmethod(uDMX_class, (t_method)uDMX_close, gensym("close"), 0);
class_addmethod(uDMX_class, (t_method)uDMX_setchannel, gensym("setchannel"), A_FLOAT, 0);
post("uDMX version 0.9 - (c) 2006 [ a n y m a ]",0); // post any important info to the max window when our object is laoded
}
//--------------------------------------------------------------------------
void uDMX_int(t_uDMX *x, long n) // x = the instance of the object; n = the int received in the left inlet
{
unsigned char buffer[8];
int nBytes;
if (n > 255) n=255;
if (n < 0) n=0;
if (x->channel > 512) x->channel=512;
if (x->channel < 0) x->channel=0;
if (!(x->dev_handle)) find_device(x);
else {
nBytes = usb_control_msg(x->dev_handle, USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_ENDPOINT_OUT,
cmd_SetSingleChannel, n, x->channel, buffer, sizeof(buffer), 5000);
if(nBytes < 0)
if (x->debug_flag) error("uDMX: USB error: %s", usb_strerror());
}
}
void uDMX_setchannel(t_uDMX *x, t_floatarg f)
{
x->channel = f;
}
//--------------------------------------------------------------------------
void uDMX_list(t_uDMX *x, t_symbol *s, short ac, t_atom *av)
{
int i;
unsigned char* buf = malloc(ac);
int nBytes;
int n;
if (x->channel > 512) x->channel=512;
if (x->channel < 0) x->channel=0;
if (!(x->dev_handle)) find_device(x);
else {
if (x->debug_flag) post("uDMX: ac: %i\n", ac);
for(i=0; i<ac; ++i,av++) {
if (av->a_type==A_FLOAT) {
n = (int) av->a_w.w_float;
if (n > 255) n=255;
if (n < 0) n=0;
buf[i] = n;
} else
buf[i] = 0;
}
nBytes = usb_control_msg(x->dev_handle, USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_ENDPOINT_OUT,
cmd_SetChannelRange, ac, x->channel, buf, ac, 5000);
if (x->debug_flag) post( "bytes returned: %i\n", nBytes);
if(nBytes < 0)
if (x->debug_flag) error("uDMX: USB error: %s\n", usb_strerror());
else if(nBytes > 0) if (x->debug_flag) post("uDMX: returned: %i\n", (int)(buf[0]));
free(buf);
}
}
//--------------------------------------------------------------------------
void uDMX_debug(t_uDMX *x, t_symbol *s, short ac, t_atom *av) // x = the instance of the object; n = the int received in the left inlet
{
x->debug_flag = 1;
if (ac) {
if (av->a_type==A_FLOAT) x->debug_flag = av->a_w.w_float;
}
}
//--------------------------------------------------------------------------
void uDMX_free(t_uDMX *x)
{
if (x->dev_handle)
usb_close(x->dev_handle);
}
//--------------------------------------------------------------------------
void uDMX_open(t_uDMX *x)
{
if (x->dev_handle) {
post("uDMX: There is already a connection to www.anyma.ch/uDMX",0);
} else find_device(x);
}
//--------------------------------------------------------------------------
void uDMX_close(t_uDMX *x)
{
if (x->dev_handle) {
usb_close(x->dev_handle);
x->dev_handle = NULL;
post("uDMX: Closed connection to www.anyma.ch/uDMX",0);
} else
post("uDMX: There was no open connection to www.anyma.ch/uDMX",0);
}
//--------------------------------------------------------------------------
void *uDMX_new(long n) // n = int argument typed into object box (A_DEFLONG) -- defaults to 0 if no args are typed
{
t_uDMX *x; // local variable (pointer to a t_uDMX data structure)
x = (t_uDMX *)pd_new(uDMX_class); // create a new instance of this object
// create a second int inlet (leftmost inlet is automatic - all objects have one inlet by default)
// floatinlet_new(x, x->channel); //crashes on PD .... assigns float in inlet 2 directly to channel
inlet_new(&x->p_ob, &x->p_ob.ob_pd, gensym("float"), gensym("setchannel"));
x->channel = 0;
x->debug_flag = 0;
x->dev_handle = NULL;
find_device(x);
return(x); // return a reference to the object instance
}
//--------------------------------------------------------------------------
static int usbGetStringAscii(usb_dev_handle *dev, int dex, int langid, char *buf, int buflen)
{
char buffer[256];
int rval, i;
if((rval = usb_control_msg(dev, USB_ENDPOINT_IN, USB_REQ_GET_DESCRIPTOR, (USB_DT_STRING << 8) + dex, langid, buffer, sizeof(buffer), 1000)) < 0)
return rval;
if(buffer[1] != USB_DT_STRING)
return 0;
if((unsigned char)buffer[0] < rval)
rval = (unsigned char)buffer[0];
rval /= 2;
/* lossy conversion to ISO Latin1 */
for(i=1;i<rval;i++){
if(i > buflen) /* destination buffer overflow */
break;
buf[i-1] = buffer[2 * i];
if(buffer[2 * i + 1] != 0) /* outside of ISO Latin1 range */
buf[i-1] = '?';
}
buf[i-1] = 0;
return i-1;
}
//--------------------------------------------------------------------------
void find_device(t_uDMX *x)
{
usb_dev_handle *handle = NULL;
struct usb_bus *bus;
struct usb_device *dev;
usb_init();
usb_find_busses();
usb_find_devices();
for(bus=usb_get_busses(); bus; bus=bus->next){
for(dev=bus->devices; dev; dev=dev->next){
if(dev->descriptor.idVendor == USBDEV_SHARED_VENDOR && dev->descriptor.idProduct == USBDEV_SHARED_PRODUCT){
char string[256];
int len;
handle = usb_open(dev); /* we need to open the device in order to query strings */
if(!handle){
error ("Warning: cannot open USB device: %s", usb_strerror());
continue;
}
/* now find out whether the device actually is uDMX */
len = usbGetStringAscii(handle, dev->descriptor.iManufacturer, 0x0409, string, sizeof(string));
if(len < 0){
post("uDMX: warning: cannot query manufacturer for device: %s", usb_strerror());
goto skipDevice;
}
// post("uDMX: seen device from vendor ->%s<-", string);
if(strcmp(string, "www.anyma.ch") != 0)
goto skipDevice;
len = usbGetStringAscii(handle, dev->descriptor.iProduct, 0x0409, string, sizeof(string));
if(len < 0){
post("uDMX: warning: cannot query product for device: %s", usb_strerror());
goto skipDevice;
}
// post("uDMX: seen product ->%s<-", string);
if(strcmp(string, "uDMX") == 0)
break;
skipDevice:
usb_close(handle);
handle = NULL;
}
}
if(handle)
break;
}
if(!handle){
post("uDMX: Could not find USB device www.anyma.ch/uDMX");
x->dev_handle = NULL;
} else {
x->dev_handle = handle;
post("uDMX: Found USB device www.anyma.ch/uDMX");
}
}
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