-
Notifications
You must be signed in to change notification settings - Fork 0
/
leduino.ino
235 lines (201 loc) · 6.39 KB
/
leduino.ino
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
// Minotor FastSPI library for Arduino compatible device
#include <inttypes.h>
#include "FastSPI_LED2.h"
// Gamma correction LUT
// Please note this gamma correction lookup table have been established using a
// cheap luxmeter in front of a 384 leds matrix using WS2801-based strip.
// This gamma coorection allow us to have a more linear brightness on each
// color and try to have a similar lux level between colors.
#include "gamma.h"
//Change this to YOUR matrix size!!
#define MATRIX_PANEL_X 3
#define MATRIX_PANEL_Y 2
#define MATRIX_PANEL_LEDS_X 8
#define MATRIX_PANEL_LEDS_Y 8
#define MATRIX_PANEL_LEDS (MATRIX_PANEL_LEDS_X*MATRIX_PANEL_LEDS_Y)
#define MATRIX_LEDS_X (MATRIX_PANEL_X*MATRIX_PANEL_LEDS_X)
#define MATRIX_LEDS_Y (MATRIX_PANEL_Y*MATRIX_PANEL_LEDS_Y)
#define MATRIX_LEDS (MATRIX_LEDS_X*MATRIX_LEDS_Y)
#define CMD_NEW_DATA 0x01
volatile uint8_t framebuffer[MATRIX_LEDS * 3];
// framebuffer-related variables used during UART interrupt
static uint8_t volatile*ptr;
static unsigned int pos = 0;
// Flag to allow loop() to display current framebuffer
volatile bool framebuffer_ready = false;
// Data pin that led data will be written out over
//#define DATA_PIN 7
// Clock pin only needed for SPI based chipsets when not using hardware SPI
//#define CLOCK_PIN 8
CRGB leds[MATRIX_LEDS];
void setup() {
// sanity check delay - allows reprogramming if accidently blowing power w/leds
delay(2000);
// Uncomment one of the following lines for your leds arrangement.
// Don't forget to change RGB order depending on your pixel modules
// FastLED.addLeds<TM1803, DATA_PIN, RGB>(leds, MATRIX_LEDS);
// FastLED.addLeds<TM1804, DATA_PIN, RGB>(leds, MATRIX_LEDS);
// FastLED.addLeds<TM1809, DATA_PIN, RGB>(leds, MATRIX_LEDS);
// FastLED.addLeds<WS2811, DATA_PIN, RGB>(leds, MATRIX_LEDS);
// FastLED.addLeds<WS2812, DATA_PIN, RGB>(leds, MATRIX_LEDS);
// FastLED.addLeds<WS2812B, DATA_PIN, RGB>(leds, MATRIX_LEDS);
// FastLED.addLeds<UCS1903, DATA_PIN, RGB>(leds, MATRIX_LEDS);
FastLED.addLeds<WS2801, BRG>(leds, MATRIX_LEDS);
// FastLED.addLeds<SM16716, RGB>(leds, MATRIX_LEDS);
// FastLED.addLeds<LPD8806, RGB>(leds, MATRIX_LEDS);
// FastLED.addLeds<WS2801, DATA_PIN, CLOCK_PIN, RGB>(leds, MATRIX_LEDS);
// FastLED.addLeds<SM16716, DATA_PIN, CLOCK_PIN, RGB>(leds, MATRIX_LEDS);
// FastLED.addLeds<LPD8806, DATA_PIN, CLOCK_PIN, RGB>(leds, MATRIX_LEDS);
//Disable global interrupts
cli();
// UART Initialisation
UCSR0A |= _BV(U2X0);
UCSR0B |= _BV(RXEN0) | _BV(TXEN0) | _BV(RXCIE0);
// Set baudrate to 1 Mbps
UBRR0H = 0;
UBRR0L = 1;
// Enable UART interrupt
UCSR0C |= _BV(UCSZ01) | _BV(UCSZ00);
// Reset ptr to framebuffer address
ptr=framebuffer;
// This display a 4 fade-in bars of colors (White, red, green, blue)
// Please note that test pattern only works for a specific leds order:
// snake from top left to bottom right on each panel, the same order for panel within screen)
// and a specific leds color order:
// Green, Red, Blue
display_test_pattern();
//Enable global interrupts
sei();
}
void display_test_pattern()
{
for (uint8_t y=0;y<MATRIX_LEDS_Y;y++)
{
for (uint8_t x=0;x<MATRIX_LEDS_X;x++) {
uint16_t id;
uint16_t x_panel_id = (y%2)
?((MATRIX_PANEL_LEDS_X-1)-(x%MATRIX_PANEL_LEDS_X))
:(x%MATRIX_PANEL_LEDS_X);
uint16_t y_panel_id = (y%MATRIX_PANEL_LEDS_Y);
uint16_t panel_id = ((y/MATRIX_PANEL_LEDS_Y)%2)
?((MATRIX_PANEL_X-1)-(x/MATRIX_PANEL_LEDS_X)) + ((y/MATRIX_PANEL_LEDS_Y) * MATRIX_PANEL_X)
:(x/MATRIX_PANEL_LEDS_X) + ((y/MATRIX_PANEL_LEDS_Y) * MATRIX_PANEL_X);
id = x_panel_id + (y_panel_id*MATRIX_PANEL_LEDS_X) + (panel_id*MATRIX_PANEL_LEDS);
//const int id = y;
const uint16_t r_id = (id * 3) + 1;
const uint16_t g_id = (id * 3) + 2;
const uint16_t b_id = (id * 3) + 0;
uint8_t r = 0;
uint8_t g = 0;
uint8_t b = 0;
if (x<3) {
// White
r = y << 4;
g = y << 4;
b = y << 4;
} else if (x<7) {
} else if (x<10) {
// Red
r = y << 4;
} else if (x<14) {
} else if (x<17) {
// Green
g = y << 4;
} else if (x<21) {
} else if (x<24) {
// Blue
b = y << 4;
}
framebuffer[r_id] = r;
framebuffer[g_id] = g;
framebuffer[b_id] = b;
}
}
framebuffer_ready=true;
}
void framerate_test()
{
//Framerate test
//Count the number of flashs on a 10sec period, multiply by 10 and you have your framerate
//Mesured arond 75fps with ArduinoMega2560 connected to 384 ws2801 pixels using fastSPI
static int cpt=0;
if ((cpt%100)==0)
{
for (int i=0; i<MATRIX_LEDS; i++)
{
framebuffer[i*3+0]=0xff;
framebuffer[i*3+1]=0xff;
framebuffer[i*3+2]=0xff;
}
cpt=0;
}
else
{
for (int i=0; i<MATRIX_LEDS; i++)
{
framebuffer[i*3+0]=0x00;
framebuffer[i*3+1]=0x00;
framebuffer[i*3+2]=0x00;
}
}
cpt++;
framebuffer_ready = true;
}
void loop()
{
//framerate_test();
if (framebuffer_ready) {
framebuffer_ready=false;
shift_out_data();
}
}
static uint8_t escape_command_step = 0;
static bool gamma_correction = true;
ISR(USART0_RX_vect)
{
unsigned char b;
// Retreive UART byte
b=UDR0;
if (escape_command_step>3) {
switch (b)
{
case 'g': // Toggle gamma correction
gamma_correction = !gamma_correction;
break;
}
escape_command_step = 0;
} else {
if(!framebuffer_ready) {
if (b == CMD_NEW_DATA) {
pos=0; ptr=framebuffer; return;
escape_command_step++;
} else {
escape_command_step = 0;
}
if (pos == (MATRIX_LEDS*3)) {} else {*ptr=b; ptr++; pos++;}
if (pos == ((MATRIX_LEDS*3)-1)) {framebuffer_ready = true;}
}
}
}
void shift_out_data()
{
for (int i=0; i<MATRIX_LEDS; i++)
{
const uint16_t id = i*3;
uint8_t r, g, b;
if(gamma_correction) {
r = gammaRed[(framebuffer[(id)+1])>>2];
g = gammaGreen[(framebuffer[(id)+2])>>2];
b = gammaBlue[(framebuffer[(id)+0])>>2];
} else {
r = framebuffer[(id)+1];
g = framebuffer[(id)+2];
b = framebuffer[(id)+0];
}
leds[i].r = r;
leds[i].g = g;
leds[i].b = b;
}
FastLED.show();
delayMicroseconds(1200); //Latch Data
}