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/*
multio
connects to multIO and listens..
left outlet for analog
middle for digital
output is a list of 2 floats (channel, value)
*/
#ifdef _WIN32
#include <windows.h>
#endif /* _WIN32 */
#include "m_pd.h"
#include "usb.h"
#include "pthread.h"
#define DEFDELTIME 20 // time between readouts in msec
#define TIMEOUT 1000 // timeout time in usb interrupts reading and writing
#define MAXBUF 1024
/* PICkit USB values */
static const int multio_vendorID=0xdead; // Microchip, Inc
static const int multio_productID=0xbeef; // PICkit 1 FLASH starter kit
static const int multio_configuration=2; /* 1: HID; 2: vendor specific */
static const int multio_interface=0;
static const int reqLen=8;
static char is_open;
typedef unsigned char byte;
static t_class *multio_class;
typedef struct _multio
{
t_object x_obj; // myself
usb_dev_handle *d; // handle to multIO
t_clock *x_clock; // as in metro
double x_deltime; // as in metro
int x_hit; // as in metro
pthread_attr_t multio_thread_attr;
pthread_t x_threadid;
unsigned char double_buffer[2][MAXBUF]; // a double buffer: thread writes one, cyclic read of the other one
// the second parameter should be deafult 1000 but setable via
// object parameters
int buf_count[2]; // how many bytes are in a buffer
unsigned char whichbuf; // which one to read from
char old_digi[8]; // buffer of digital input, is a byte, 8 values at a time
char digi_outs[8]; // buffer of digital input, is a byte, 8 values at a time
int analog_buffer[64]; // buffered analog outs
int x_verbose;
t_outlet *a_out, *d_out, *s_out; // outlets
} t_multio;
static void *usb_read_thread(void *w)
{
t_multio *x = (t_multio*) w;
int cnt = 0;
int bytesread = 0;
unsigned char mybuf = 1;
unsigned char buffer[8];
while(1) // never ending
{
pthread_testcancel();
if(x->d) // only read if the device is opened
{
if(x->buf_count[x->whichbuf] <= 0) // check if the read buffer is empty
{
mybuf = x->whichbuf; // if so, use it for writing
x->whichbuf = !(x->whichbuf &1); // and toggle the read buffer
}
bytesread = usb_interrupt_read(x->d, 0x81, buffer, 8, 1000);
if(bytesread > 0)
{
if(x->buf_count[mybuf]+bytesread > MAXBUF)
x->buf_count[mybuf] = 0;
x->double_buffer[mybuf][x->buf_count[mybuf]++] = bytesread; // store the number of bytes for that message
for(cnt = 0; cnt < bytesread; cnt++) // append the message data into the buffer
{
x->double_buffer[mybuf][x->buf_count[mybuf]++] = buffer[cnt];
}
// if(x->x_verbose)post("thread read %i bytes to buffer %i (now %i bytes)",bytesread, mybuf,x->buf_count[mybuf] );
}
}
#ifdef _WIN32
Sleep(1);
#endif /* _WIN32 */
}
}
static void start_thread(t_multio *x)
{
// create the worker thread
if(pthread_attr_init(&x->multio_thread_attr) < 0)
{
error("multio: could not launch receive thread");
return;
}
if(pthread_attr_setdetachstate(&x->multio_thread_attr, PTHREAD_CREATE_DETACHED) < 0)
{
error("multio: could not launch receive thread");
return;
}
if(pthread_create(&x->x_threadid, &x->multio_thread_attr, usb_read_thread, x) < 0)
{
error("multio: could not launch receive thread");
return;
}
else
{
if(x->x_verbose)post("multio: thread %d launched", (int)x->x_threadid );
}
}
// methods invoked by the inlets
static void multio_analog_write(t_multio *x, t_symbol *s, int argc, t_atom *argv)
{
int channel;
int value;
unsigned char buffer[8];
int bytesread;
if (argc<2)
{
error("multio: multio_analog_write error: i need minimum 2 values list");
return;
}
if (!(x->d))
{
error("multio: multI/O not initialized");
return;
}
channel = atom_getfloat(argv++);
value = atom_getfloat(argv);
if(channel < 0 || channel > 63)
{
error("multio: inconsistent dac output channel: %d", channel);
return;
}
if (value != x->analog_buffer[channel])
{
x->analog_buffer[channel] = value;
buffer[0] = 97 + channel; // channel is 0 based
buffer[1] = value & 0xff;
buffer[2] = (value & 0xff00) >> 8;
bytesread = usb_interrupt_write(x->d, 1, buffer, 3, TIMEOUT);
}
}
static void multio_digi_write(t_multio *x, t_symbol *s, int argc, t_atom *argv)
{
int channel;
int value;
unsigned char buffer[8];
int bytesread;
char testbit = 0x01;
int count;
int group;
int channel_in_group;
char ctmp;
char bitmask;
if (argc<2)
{
error("multio: multio_digi_write error: i need minimum 2 values list");
return;
}
channel = atom_getfloat(argv++);
value = atom_getfloat(argv);
if(channel < 0 || channel > 63)
{
error("multio: inconsistent digital output channel: %d", channel);
return;
}
group = channel / 8 ;
channel_in_group = channel % 8;
bitmask = 0x01 << channel_in_group;
ctmp = x->digi_outs[group] & ~bitmask;
if (value)
ctmp = ctmp | bitmask;
if(ctmp != x->digi_outs[group])
{
x->digi_outs[group] = ctmp;
buffer[0] = group + 1; // + 1 is the offset for digi outs (1..9)
buffer[1] = ctmp;
bytesread = usb_interrupt_write(x->d, 1, buffer, 3, TIMEOUT);
if(x->x_verbose)post("multio: writing %i to group %i", ctmp, group);
}
}
static void multio_system_write(t_multio *x, t_symbol *s, int argc, t_atom *argv)
{
unsigned char cmd, bvalue, smallvalue;
unsigned short int value;
unsigned char buffer[5];
if (argc<3)
{
error("multio: multio_system_write error: i need minimum 3 values list");
return;
}
cmd = atom_getfloat(argv++);
bvalue = atom_getfloat(argv++);
buffer[0] = 161;
buffer[1] = cmd;
buffer[2] = bvalue;
switch(cmd)
{
case 0:
case 1: usb_interrupt_write(x->d, 1, buffer, 3, TIMEOUT); break;
case 2:
case 3:
case 4: value = atom_getfloat(argv);
buffer[3] = value & 0x00ff;
buffer[4] = value >> 8;
usb_interrupt_write(x->d, 1, buffer, 5, TIMEOUT);
break;
case 5:
case 6:
case 7:
case 8: buffer[3] = atom_getfloat(argv);
usb_interrupt_write(x->d, 1, buffer, 4, TIMEOUT);
break;
case 9:
case 10:
case 11:
case 12:
case 13:
case 14:
case 15:
case 16:
case 17: usb_interrupt_write(x->d, 1, buffer, 3, TIMEOUT); break;
default: error("multio: unknown system command"); break;
}
}
// read & process the buffer
// this will be called each tick in the pd object
static void process_buffer(t_multio *x)
{
int cnt;
if(x->buf_count[x->whichbuf] > 0)
{
// post("process %i bytes buffer\n", x->buf_count[x->whichbuf]);
for(cnt = 0; cnt < x->buf_count[x->whichbuf]; cnt++)
{
if(x->double_buffer[x->whichbuf][cnt] == 2)
{
// post("process buf: %i msglen: %i id: %i val: %i", x->whichbuf, x->double_buffer[x->whichbuf][cnt],x->double_buffer[x->whichbuf][cnt+1],x->double_buffer[x->whichbuf][cnt+2]);
if (x->double_buffer[x->whichbuf][cnt+1]>=1 && x->double_buffer[x->whichbuf][cnt+1] <= 8)
{
// digital input
//send_digi(x, first-1, buffer[1]);
char testbit = 0x01;
t_atom lista[2];
int count;
int group = x->double_buffer[x->whichbuf][cnt+1]-1;
for(count = 0; count < 8; count++)
{
if((x->double_buffer[x->whichbuf][cnt+2] & testbit) != (x->old_digi[group] & testbit))
{
SETFLOAT(lista, (group*8)+count);
if(x->double_buffer[x->whichbuf][cnt+2] & testbit)
SETFLOAT(lista+1, 1);
else
SETFLOAT(lista+1, 0);
outlet_anything(x->d_out, gensym("list") , 2, lista);
}
testbit <<= 1;
}
x->old_digi[group] = x->double_buffer[x->whichbuf][cnt+2];
}
cnt += 2;
}
else if(x->double_buffer[x->whichbuf][cnt] == 3)
{
// post("process buf: %i msglen: %i id: %i val: %i", x->whichbuf, x->double_buffer[x->whichbuf][cnt],x->double_buffer[x->whichbuf][cnt+1],x->double_buffer[x->whichbuf][cnt+2] + (x->double_buffer[x->whichbuf][cnt+3] << 8));
if (x->double_buffer[x->whichbuf][cnt+1]>=9 && x->double_buffer[x->whichbuf][cnt+1] <=96)
{
// analog input
t_atom lista[2];
int result;
int channel = x->double_buffer[x->whichbuf][cnt+1]-9;
result = x->double_buffer[x->whichbuf][cnt+2] + (x->double_buffer[x->whichbuf][cnt+3] << 8);
x->analog_buffer[channel] = result;
SETFLOAT(lista, channel);
SETFLOAT(lista+1, result);
outlet_anything(x->a_out, gensym("list"),2 , lista);
}
cnt += 3;
}
else
cnt += x->double_buffer[x->whichbuf][cnt];
}
x->buf_count[x->whichbuf] = 0;
}
}
/*
// method invoked by the timer
static void multio_read(t_multio *x)
{
unsigned char buffer[8];
int first;
int bytesread;
byte retData[8];
int reads=64;
if (x->d)
{
} else
{
error("multIO: connection not inizialized");
return;
}
while(usb_interrupt_read(x->d, 0x81, buffer, 8, 2) > 0)
{
// reads--;
//if (usb_interrupt_read(x->d, 0x81, buffer, 8, TIMEOUT) > 0)
//{
first = buffer[0];
if (first>=1 && first <= 8)
{
// digital input
//send_digi(x, first-1, buffer[1]);
char testbit = 0x01;
t_atom lista[2];
int count;
int group = first-1;
for(count = 0; count < 8; count++)
{
if((buffer[1] & testbit) != (x->old_digi[group] & testbit))
{
SETFLOAT(lista, (group*8)+count);
if(buffer[1] & testbit)
SETFLOAT(lista+1, 1);
else
SETFLOAT(lista+1, 0);
outlet_anything(x->d_out, gensym("list") , 2, lista);
}
testbit <<= 1;
}
x->old_digi[group] = buffer[1];
}
if (first>=9 && first <=96)
{
// analog input
t_atom lista[2];
int result;
int channel = first-9;
result = buffer[1] + (buffer[2] << 8);
x->analog_buffer[channel] = result;
SETFLOAT(lista, channel);
SETFLOAT(lista+1, result);
outlet_anything(x->a_out, gensym("list"),2 , lista);
}
if (first==161)
{
t_atom list2[2];
t_atom list3[3];
switch(buffer[1])
{
case 0:
case 1: SETFLOAT(list2, buffer[1]);
SETFLOAT(list2+1, buffer[2]);
outlet_anything(x->s_out, gensym("list"),2 , list2);
break;
case 2:
case 3:
case 4: SETFLOAT(list3, buffer[1]);
SETFLOAT(list3+1, buffer[2]);
SETFLOAT(list3+2, (float)(buffer[3] + (buffer[4]<<8)) );
outlet_anything(x->s_out, gensym("list"),3 , list3);
break;
case 5:
case 6:
case 7:
case 8: SETFLOAT(list3, buffer[1]);
SETFLOAT(list3+1, buffer[2]);
SETFLOAT(list3+2, buffer[3]);
outlet_anything(x->s_out, gensym("list"),3 , list3);
break;
case 9: SETFLOAT(list2, buffer[1] - 9);
outlet_anything(x->a_out, gensym("list"),2 , list2);
break;
case 10:
case 11:
case 12:
case 13:
case 14:
case 15:
case 16:
case 17: SETFLOAT(list3, buffer[1]);
SETFLOAT(list3+1, buffer[2]);
SETFLOAT(list3+2, buffer[3]);
outlet_anything(x->s_out, gensym("list"),3 , list3);
break;
default: error("unknown system command echo"); break;
}
// system input
}
}
}
*/
static void multio_open(t_multio *x)
{
struct usb_device *device;
struct usb_bus* bus;
unsigned char buffer[8];
usb_init();
usb_find_busses();
usb_find_devices();
for (bus=usb_get_busses();bus!=NULL;bus=bus->next)
{
struct usb_device* usb_devices = bus->devices;
for(device=usb_devices;device;device=device->next)
{
if (device->descriptor.idVendor == multio_vendorID
&&device->descriptor.idProduct == multio_productID)
{
post( "multio: Found mamalala multI/O as device '%s' on USB bus %s",
device->filename,
device->bus->dirname);
x->d=usb_open(device);
if (x->d)
{ /* This is our device-- claim it */
if (usb_set_configuration(x->d,multio_configuration)) {
post("multio: Error setting USB configuration.");
usb_close(x->d);
return;
}
else post("multio: Selecting non-HID config");
if (usb_claim_interface(x->d,multio_interface)) {
post("multio: Claim failed-- the mamalala multI/O is in use by another driver.\n"
"multio: Do a `dmesg` to see which kernel driver has claimed it--\n"
"multio: You may need to `rmmod hid` or patch your kernel's hid driver.");
usb_close(x->d);
return;
}
else post("multio: Claimed interface");
while(usb_interrupt_read(x->d, 0x81, buffer, 8, 10) > 0)
{
}
return;
}
}
}
}
// if i am here then i couldn't find mutlIO!
error("multio: unable to find multI/O !");
}
static void multio_tick(t_multio *x)
{
x->x_hit = 0;
// multio_read(x);
process_buffer(x);
if (!x->x_hit) clock_delay(x->x_clock, x->x_deltime);
}
static void multio_float(t_multio *x, t_float f)
{
if (f != 0) multio_tick(x);
else clock_unset(x->x_clock);
x->x_hit = 1;
}
static void multio_start(t_multio *x)
{
multio_float(x, 1);
}
static void multio_stop(t_multio *x)
{
multio_float(x, 0);
}
static void multio_ft1(t_multio *x, t_floatarg g)
{
if (g < 1) g = 1;
x->x_deltime = g;
}
static void multio_verbose(t_multio *x, t_floatarg g)
{
x->x_verbose=(g > 0) ;
}
static void multio_free(t_multio *x)
{
if(is_open)
{
clock_free(x->x_clock);
if(x->d)
{
while(pthread_cancel(x->x_threadid) < 0)
if(x->x_verbose)post("multio: killing thread\n");
if(x->x_verbose)post("multio: thread canceled\n");
usb_close(x->d);
}
is_open = 0;
}
else
if(x->x_verbose)post("multio: not active object");
}
static void *multio_new(t_symbol *s, int argc, t_atom *argv)
{
if(!is_open)
{
t_multio *x = (t_multio *)pd_new(multio_class);
x->x_clock = clock_new(x, (t_method)multio_tick);
x->x_deltime = DEFDELTIME;
x->x_verbose = 0;
x->a_out = outlet_new(&x->x_obj, &s_list);
x->d_out = outlet_new(&x->x_obj, &s_list);
x->s_out = outlet_new(&x->x_obj, &s_list);
// look for multIO
multio_open(x);
if(x->d)
start_thread(x);
// inlets for digital and system
inlet_new(&x->x_obj, &x->x_obj.ob_pd, gensym("list"), gensym("digi_write")); // remap to digi_write
inlet_new(&x->x_obj, &x->x_obj.ob_pd, gensym("list"), gensym("system_write"));
is_open = 1;
multio_start(x);
return (x);
}
else
{
error("multio: object already exists");
return(0);
}
}
void multio_setup(void)
{
multio_class = class_new(gensym("multio"), (t_newmethod)multio_new,
(t_method)multio_free, sizeof(t_multio), CLASS_DEFAULT, A_GIMME, 0);
//class_addbang(multio_class, (t_method)multio_bang);
// to set the time between 2 readouts
class_addmethod(multio_class, (t_method)multio_ft1, gensym("readout_time"),
A_FLOAT, 0);
class_addfloat(multio_class, (t_method)multio_float); // start/stop using a toggle
// to stop reading
class_addmethod(multio_class, (t_method)multio_stop, gensym("stop"), 0);
// to start reading
class_addmethod(multio_class, (t_method)multio_start, gensym("start"), 0);
// open the device
class_addmethod(multio_class, (t_method)multio_open, gensym("open"), 0);
// write analog data using leftmost inlet
class_addlist(multio_class, (t_method)multio_analog_write);
class_addmethod(multio_class, (t_method)multio_digi_write, gensym("digi_write"),
A_GIMME, 0);
class_addmethod(multio_class, (t_method)multio_system_write, gensym("system_write"),
A_GIMME, 0);
is_open = 0;
class_addmethod(multio_class, (t_method)multio_verbose, gensym("verbose"), A_FLOAT, 0);
// welcome message
post("\nmultio: a pd driver for the multI/O USB device");
post("multio: www.davidemorelli.it - multio.mamalala.de");
}
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