Add a USB WS2812 Driver

This commit is contained in:
cnlohr 2015-01-17 17:06:34 -05:00
parent 17aef1eab6
commit d5c518ec0a
2 changed files with 166 additions and 197 deletions

166
DisplayUSB2812.c Normal file
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@ -0,0 +1,166 @@
#include "outdrivers.h"
#include "notefinder.h"
#include <stdio.h>
#include <string.h>
#include "parameters.h"
#include <stdlib.h>
#include <libusb-1.0/libusb.h>
#include "color.h"
#include <math.h>
#include <unistd.h>
struct LEDOutDriver
{
struct libusb_device_handle *devh;
int did_init;
int zigzag;
int total_leds;
int array;
float outamp;
uint8_t * last_leds;
volatile int readyFlag;
int xn;
int yn;
int rot90;
};
static void * LEDOutThread( void * v )
{
struct LEDOutDriver * led = (struct LEDOutDriver*)v;
while(1)
{
if( led->readyFlag )
{
int r = libusb_control_transfer( led->devh,
0x40, //reqtype
0xA5, //request
0x0100, //wValue
0x0000, //wIndex
led->last_leds,
(led->total_leds*3)+1,
1000 );
if( r < 0 )
{
led->did_init = 0;
printf( "Fault sending LEDs.\n" );
}
led->readyFlag = 0;
}
usleep(100);
}
return 0;
}
static void LEDUpdate(void * id, struct NoteFinder*nf)
{
int i;
struct LEDOutDriver * led = (struct LEDOutDriver*)id;
if( !led->did_init )
{
led->did_init = 1;
if( libusb_init(NULL) < 0 )
{
fprintf( stderr, "Error: Could not initialize libUSB\n" );
exit( -99 );
}
led->devh = libusb_open_device_with_vid_pid( NULL, 0xabcd, 0xf003 );
if( !led->devh )
{
fprintf( stderr, "Error: Cannot find device.\n" );
exit( -98 );
}
}
while( led->readyFlag ) usleep(100);
//Advance the LEDs to this position when outputting the values.
for( i = 0; i < led->total_leds; i++ )
{
int source = i;
if( !led->array )
{
int sx, sy;
if( led->rot90 )
{
sy = i % led->yn;
sx = i / led->yn;
}
else
{
sx = i % led->xn;
sy = i / led->xn;
}
if( led->zigzag )
{
if( led->rot90 )
{
if( sx & 1 )
{
sy = led->yn - sy - 1;
}
}
else
{
if( sy & 1 )
{
sx = led->xn - sx - 1;
}
}
}
if( led->rot90 )
{
source = sx + sy * led->xn;
}
else
{
source = sx + sy * led->yn;
}
}
led->last_leds[i*3+0] = OutLEDs[source*3+0] * led->outamp;
led->last_leds[i*3+2] = OutLEDs[source*3+1] * led->outamp;
led->last_leds[i*3+1] = OutLEDs[source*3+2] * led->outamp;
}
led->readyFlag = 1;
}
static void LEDParams(void * id )
{
struct LEDOutDriver * led = (struct LEDOutDriver*)id;
led->total_leds = GetParameterI( "leds", 300 );
led->last_leds = malloc( led->total_leds * 3 + 1 );
led->outamp = .1; RegisterValue( "ledoutamp", PAFLOAT, &led->outamp, sizeof( led->outamp ) );
led->zigzag = 0; RegisterValue( "zigzag", PAINT, &led->zigzag, sizeof( led->zigzag ) );
led->xn = 16; RegisterValue( "lightx", PAINT, &led->xn, sizeof( led->xn ) );
led->yn = 9; RegisterValue( "lighty", PAINT, &led->yn, sizeof( led->yn ) );
led->rot90 = 0; RegisterValue( "rot90", PAINT, &led->rot90, sizeof( led->rot90 ) );
led->array = 0; RegisterValue( "ledarray", PAINT, &led->array, sizeof( led->array ) );
led->did_init = 0;
}
static struct DriverInstances * DisplayUSB2812()
{
struct DriverInstances * ret = malloc( sizeof( struct DriverInstances ) );
memset( ret, 0, sizeof( struct DriverInstances ) );
struct LEDOutDriver * led = ret->id = malloc( sizeof( struct LEDOutDriver ) );
ret->Func = LEDUpdate;
ret->Params = LEDParams;
OGCreateThread( LEDOutThread, led );
led->readyFlag = 0;
LEDParams( led );
return ret;
}
REGISTER_OUT_DRIVER(DisplayUSB2812);

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@ -1,197 +0,0 @@
#include "outdrivers.h"
#include "notefinder.h"
#include <stdio.h>
#include <string.h>
#include "parameters.h"
#include <stdlib.h>
#include <libusb-1.0/libusb.h>
#include "color.h"
#include <math.h>
#include <unistd.h>
struct LEDOutDriver
{
struct libusb_device_handle *devh;
int did_init;
int total_leds;
float light_siding;
float * last_led_pos;
float * last_led_amp;
float led_floor;
int led_bins;
float ampoff;
uint8_t * last_leds;
volatile int readyFlag;
};
static void * LEDOutThread( void * v )
{
struct LEDOutDriver * led = (struct LEDOutDriver*)v;
while(1)
{
if( led->readyFlag )
{
int r = libusb_control_transfer( led->devh,
0x40, //reqtype
0xA5, //request
0x0100, //wValue
0x0000, //wIndex
led->last_leds,
(led->total_leds*3)+1,
1000 );
if( r < 0 ) led->did_init = 0;
led->readyFlag = 0;
}
usleep(100);
}
return 0;
}
static void LEDUpdate(void * id, struct NoteFinder*nf)
{
struct LEDOutDriver * led = (struct LEDOutDriver*)id;
if( !led->did_init )
{
led->did_init = 1;
if( libusb_init(NULL) < 0 )
{
fprintf( stderr, "Error: Could not initialize libUSB\n" );
exit( -99 );
}
led->devh = libusb_open_device_with_vid_pid( NULL, 0xabcd, 0xf003 );
if( !led->devh )
{
fprintf( stderr, "Error: Cannot find device.\n" );
exit( -98 );
}
}
//Step 1: Calculate the quantity of all the LEDs we'll want.
int totbins = nf->dists;
int i, j;
float binvals[totbins];
float binpos[totbins];
float totalbinval = 0;
// if( totbins > led_bins ) totbins = led_bins;
for( i = 0; i < totbins; i++ )
{
binpos[i] = nf->note_positions[i] / nf->freqbins;
binvals[i] = pow( nf->note_amplitudes[i], led->light_siding );
totalbinval += binvals[i];
}
float rledpos[led->total_leds];
float rledamp[led->total_leds];
int rbinout = 0;
for( i = 0; i < totbins; i++ )
{
int nrleds = (int)((binvals[i] / totalbinval) * led->total_leds);
if( nrleds < 40 ) nrleds = 0;
for( j = 0; j < nrleds && rbinout < led->total_leds; j++ )
{
rledpos[rbinout] = binpos[i];
rledamp[rbinout] = binvals[i];
rbinout++;
}
}
for( ; rbinout < led->total_leds; rbinout++ )
{
rledpos[rbinout] = rledpos[rbinout-1];
rledamp[rbinout] = rledamp[rbinout-1];
}
//Now we have to minimize "advance".
int minadvance = 0;
// float mindiff = 1e20;
/*
//Uncomment this for a rotationally continuous surface.
for( i = 0; i < total_leds; i++ )
{
float diff = 0;
diff = 0;
for( j = 0; j < total_leds; j+=4 )
{
int r = (j + i) % total_leds;
diff += (last_led_pos[j] - rledpos[r])*(last_led_pos[j] - rledpos[r]);
}
if( diff < mindiff )
{
mindiff = diff;
minadvance = i;
}
}
*/
// printf( "MA: %d %f\n", minadvance, mindiff );
while( led->readyFlag ) usleep(100);
//Advance the LEDs to this position when outputting the values.
for( i = 0; i < led->total_leds; i++ )
{
int ia = ( i + minadvance + led->total_leds ) % led->total_leds;
led->last_led_pos[i] = rledpos[ia];
led->last_led_amp[i] = rledamp[ia] * led->ampoff;
int r = CCtoHEX( led->last_led_pos[i], 1.0, led->last_led_amp[i] );
led->last_leds[i*3+0] = (r>>8) & 0xff;
led->last_leds[i*3+1] = r & 0xff;
led->last_leds[i*3+2] = (r>>16) & 0xff;
}
led->readyFlag = 1;
}
static void LEDParams(void * id )
{
struct LEDOutDriver * led = (struct LEDOutDriver*)id;
led->total_leds = GetParameterI( "leds", 300 );
led->ampoff = GetParameterF( "amp", 1.0 );
led->light_siding = GetParameterF( "light_siding", 1.4 );
printf( "Found LEDs for output. leds=%d\n", led->total_leds );
if( led->last_led_pos ) free( led->last_led_pos );
led->last_led_pos = malloc( sizeof( float ) * led->total_leds );
if( led->last_led_amp ) free( led->last_led_amp );
led->last_led_amp = malloc( sizeof( float ) * led->total_leds );
led->led_floor = GetParameterF( "led_floor", .1 );
led->led_bins = GetParameterF( "led_bins", 12 );
if( led->last_leds ) free( led->last_leds );
led->last_leds = malloc( led->total_leds * 3 );
}
static struct DriverInstances * LEDOutDriver()
{
struct DriverInstances * ret = malloc( sizeof( struct DriverInstances ) );
memset( ret, 0, sizeof( struct DriverInstances ) );
struct LEDOutDriver * led = ret->id = malloc( sizeof( struct LEDOutDriver ) );
ret->Func = LEDUpdate;
ret->Params = LEDParams;
OGCreateThread( LEDOutThread, led );
led->readyFlag = 0;
LEDParams( led );
return ret;
}
REGISTER_OUT_DRIVER(LEDOutDriver);