256 lines
6.6 KiB
C++
256 lines
6.6 KiB
C++
/* LEDstream_FastLED
|
|
*
|
|
* Modified version of Adalight that uses the FastLED
|
|
* library (http://fastled.io) for driving led strips.
|
|
*
|
|
* http://github.com/dmadison/Adalight-FastLED
|
|
*
|
|
* --------------------------------------------------------------------
|
|
* This program is free software: you can redistribute it and/or modify
|
|
* it under the terms of the GNU Lesser General Public License as published by
|
|
* the Free Software Foundation, either version 3 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU Lesser General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU Lesser General Public License
|
|
* along with this program. If not, see <http://www.gnu.org/licenses/>.
|
|
* --------------------------------------------------------------------
|
|
*/
|
|
|
|
// --- General Settings
|
|
static const uint16_t
|
|
Num_Leds = 80; // strip length
|
|
static const uint8_t
|
|
Led_Pin = 6, // Arduino data output pin
|
|
Brightness = 255; // maximum brightness
|
|
|
|
// --- FastLED Setings
|
|
#define LED_TYPE WS2812B // led strip type for FastLED
|
|
#define COLOR_ORDER GRB // color order for bitbang
|
|
|
|
// --- Serial Settings
|
|
static const unsigned long
|
|
SerialSpeed = 115200; // serial port speed
|
|
static const uint16_t
|
|
SerialTimeout = 60; // time before LEDs are shut off if no data (in seconds), 0 to disable
|
|
|
|
// --- Optional Settings (uncomment to add)
|
|
#define SERIAL_FLUSH // Serial buffer cleared on LED latch
|
|
//#define CLEAR_ON_START // LEDs are cleared on reset
|
|
//#define GROUND_PIN 10 // additional grounding pin (optional)
|
|
//#define CALIBRATE // sets all LEDs to the color of the first
|
|
|
|
// --- Debug Settings (uncomment to add)
|
|
//#define DEBUG_LED 13 // toggles the Arduino's built-in LED on header match
|
|
//#define DEBUG_FPS 8 // enables a pulse on LED latch
|
|
|
|
// --------------------------------------------------------------------
|
|
|
|
#include <FastLED.h>
|
|
|
|
CRGB leds[Num_Leds];
|
|
uint8_t * ledsRaw = (uint8_t *)leds;
|
|
|
|
// A 'magic word' (along with LED count & checksum) precedes each block
|
|
// of LED data; this assists the microcontroller in syncing up with the
|
|
// host-side software and properly issuing the latch (host I/O is
|
|
// likely buffered, making usleep() unreliable for latch). You may see
|
|
// an initial glitchy frame or two until the two come into alignment.
|
|
// The magic word can be whatever sequence you like, but each character
|
|
// should be unique, and frequent pixel values like 0 and 255 are
|
|
// avoided -- fewer false positives. The host software will need to
|
|
// generate a compatible header: immediately following the magic word
|
|
// are three bytes: a 16-bit count of the number of LEDs (high byte
|
|
// first) followed by a simple checksum value (high byte XOR low byte
|
|
// XOR 0x55). LED data follows, 3 bytes per LED, in order R, G, B,
|
|
// where 0 = off and 255 = max brightness.
|
|
|
|
static const uint8_t magic[] = {
|
|
'A','d','a'};
|
|
#define MAGICSIZE sizeof(magic)
|
|
|
|
// Check values are header byte # - 1, as they are indexed from 0
|
|
#define HICHECK (MAGICSIZE)
|
|
#define LOCHECK (MAGICSIZE + 1)
|
|
#define CHECKSUM (MAGICSIZE + 2)
|
|
|
|
enum processModes_t {Header, Data} mode = Header;
|
|
|
|
static int16_t
|
|
c;
|
|
static uint16_t
|
|
outPos;
|
|
static uint32_t
|
|
bytesRemaining;
|
|
static unsigned long
|
|
t,
|
|
lastByteTime,
|
|
lastAckTime;
|
|
|
|
// Debug macros initialized
|
|
#ifdef DEBUG_LED
|
|
#define ON 1
|
|
#define OFF 0
|
|
|
|
#define D_LED(x) do {digitalWrite(DEBUG_LED, x);} while(0)
|
|
#else
|
|
#define D_LED(x)
|
|
#endif
|
|
|
|
#ifdef DEBUG_FPS
|
|
#define D_FPS do {digitalWrite(DEBUG_FPS, HIGH); digitalWrite(DEBUG_FPS, LOW);} while (0)
|
|
#else
|
|
#define D_FPS
|
|
#endif
|
|
|
|
void setup(){
|
|
#ifdef GROUND_PIN
|
|
pinMode(GROUND_PIN, OUTPUT);
|
|
digitalWrite(GROUND_PIN, LOW);
|
|
#endif
|
|
|
|
#ifdef DEBUG_LED
|
|
pinMode(DEBUG_LED, OUTPUT);
|
|
digitalWrite(DEBUG_LED, LOW);
|
|
#endif
|
|
|
|
#ifdef DEBUG_FPS
|
|
pinMode(DEBUG_FPS, OUTPUT);
|
|
#endif
|
|
|
|
FastLED.addLeds<LED_TYPE, Led_Pin, COLOR_ORDER>(leds, Num_Leds);
|
|
FastLED.setBrightness(Brightness);
|
|
|
|
#ifdef CLEAR_ON_START
|
|
FastLED.show();
|
|
#endif
|
|
|
|
Serial.begin(SerialSpeed);
|
|
Serial.print("Ada\n"); // Send ACK string to host
|
|
|
|
lastByteTime = lastAckTime = millis(); // Set initial counters
|
|
}
|
|
|
|
void loop(){
|
|
adalight();
|
|
}
|
|
|
|
void adalight(){
|
|
t = millis(); // Save current time
|
|
|
|
// If there is new serial data
|
|
if((c = Serial.read()) >= 0){
|
|
lastByteTime = lastAckTime = t; // Reset timeout counters
|
|
|
|
switch(mode) {
|
|
case Header:
|
|
headerMode();
|
|
break;
|
|
case Data:
|
|
dataMode();
|
|
break;
|
|
}
|
|
}
|
|
else {
|
|
// No new data
|
|
timeouts();
|
|
}
|
|
}
|
|
|
|
void headerMode(){
|
|
static uint8_t
|
|
headPos,
|
|
hi, lo, chk;
|
|
|
|
if(headPos < MAGICSIZE){
|
|
// Check if magic word matches
|
|
if(c == magic[headPos]) {headPos++;}
|
|
else {headPos = 0;}
|
|
}
|
|
else{
|
|
// Magic word matches! Now verify checksum
|
|
switch(headPos){
|
|
case HICHECK:
|
|
hi = c;
|
|
headPos++;
|
|
break;
|
|
case LOCHECK:
|
|
lo = c;
|
|
headPos++;
|
|
break;
|
|
case CHECKSUM:
|
|
chk = c;
|
|
if(chk == (hi ^ lo ^ 0x55)) {
|
|
// Checksum looks valid. Get 16-bit LED count, add 1
|
|
// (# LEDs is always > 0) and multiply by 3 for R,G,B.
|
|
D_LED(ON);
|
|
bytesRemaining = 3L * (256L * (long)hi + (long)lo + 1L);
|
|
outPos = 0;
|
|
memset(leds, 0, Num_Leds * sizeof(struct CRGB));
|
|
mode = Data; // Proceed to latch wait mode
|
|
}
|
|
headPos = 0; // Reset header position regardless of checksum result
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
void dataMode(){
|
|
// If LED data is not full
|
|
if (outPos < sizeof(leds)){
|
|
dataSet();
|
|
}
|
|
bytesRemaining--;
|
|
|
|
if(bytesRemaining == 0) {
|
|
// End of data -- issue latch:
|
|
mode = Header; // Begin next header search
|
|
FastLED.show();
|
|
D_FPS;
|
|
D_LED(OFF);
|
|
#ifdef SERIAL_FLUSH
|
|
serialFlush();
|
|
#endif
|
|
}
|
|
}
|
|
|
|
void dataSet(){
|
|
#ifdef CALIBRATE
|
|
if(outPos < 3)
|
|
ledsRaw[outPos++] = c;
|
|
else{
|
|
ledsRaw[outPos] = ledsRaw[outPos%3]; // Sets RGB data to first LED color
|
|
outPos++;
|
|
}
|
|
#else
|
|
ledsRaw[outPos++] = c; // Issue next byte
|
|
#endif
|
|
}
|
|
|
|
void timeouts(){
|
|
// No data received. If this persists, send an ACK packet
|
|
// to host once every second to alert it to our presence.
|
|
if((t - lastAckTime) >= 1000) {
|
|
Serial.print("Ada\n"); // Send ACK string to host
|
|
lastAckTime = t; // Reset counter
|
|
|
|
// If no data received for an extended time, turn off all LEDs.
|
|
if(SerialTimeout != 0 && (t - lastByteTime) >= (uint32_t) SerialTimeout * 1000) {
|
|
memset(leds, 0, Num_Leds * sizeof(struct CRGB)); //filling Led array by zeroes
|
|
FastLED.show();
|
|
mode = Header;
|
|
lastByteTime = t; // Reset counter
|
|
}
|
|
}
|
|
}
|
|
|
|
void serialFlush(){
|
|
while(Serial.available() > 0) {
|
|
byte r = Serial.read();
|
|
}
|
|
}
|