adkfadsdga.cpp

/*
 *  Project     Adalight FastLED
 *  @author     David Madison
 *  @link       github.com/dmadison/Adalight-FastLED
 *  @license    LGPL - Copyright (c) 2017 David Madison
 *
 * 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/>.
 *
 */

#include <Arduino.h>

// --- General Settings
const uint16_t 
	Num_Leds   =  80;         // strip length
const uint8_t
	Brightness =  255;        // maximum brightness

// --- FastLED Setings
#define LED_TYPE     WS2812B  // led strip type for FastLED
#define COLOR_ORDER  GRB      // color order for bitbang
#define PIN_DATA     6        // led data output pin
// #define PIN_CLOCK  7       // led data clock pin (uncomment if you're using a 4-wire LED type)

// --- Serial Settings
const unsigned long
	SerialSpeed    = 115200;  // serial port speed
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

// --- 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.

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;

int16_t c;  // current byte, must support -1 if no data available
uint16_t outPos;  // current byte index in the LED array
uint32_t bytesRemaining;  // count of bytes yet received, set by checksum
unsigned long t, lastByteTime, lastAckTime;  // millisecond timestamps

void headerMode();
void dataMode();
void timeouts();