Initial commit

src/ESPDMX.cpp

@@ -0,0 +1,84 @@
+// - - - - -
+// ESPDMX - A Arduino library for sending and receiving DMX using the builtin serial hardware port.
+// ESPDMX.cpp: Library implementation file
+//
+// Copyright (C) 2015  Rick <ricardogg95@gmail.com>
+// This work is licensed under a GNU style license.
+//
+// Last change: Marcel Seerig <https://github.com/mseerig>
+//
+// Documentation and samples are available at https://github.com/Rickgg/ESP-Dmx
+// - - - - -
+
+/* ----- LIBRARIES ----- */
+#include <Arduino.h>
+#include "ESPDMX.h"
+
+#define DMXSPEED       250000
+#define DMXFORMAT      SERIAL_8N2
+#define BREAKSPEED     83333
+#define BREAKFORMAT    SERIAL_8N1
+#define SERIALPORT     Serial0
+#define DMXCHANNELS    512
+
+bool dmxStarted = false;
+int sendPin = 18;
+int receivePin = -1;
+
+// DMX value array and size. Entry 0 will hold startbyte, so we need 512+1 elements
+uint8_t dmxDataStore[DMXCHANNELS+1] = {};
+
+
+// Set up the DMX-Protocol
+void DMXESPSerial::init() {
+  SERIALPORT.begin(DMXSPEED, DMXFORMAT, receivePin, sendPin);
+  pinMode(sendPin, OUTPUT);
+  dmxStarted = true;
+}
+
+// Function to read DMX data
+uint8_t DMXESPSerial::read(int Channel) {
+  if (dmxStarted == false) init();
+
+  if (Channel < 1) Channel = 1;
+  if (Channel > DMXCHANNELS) Channel = DMXCHANNELS;
+  return(dmxDataStore[Channel]);
+}
+
+// Function to send DMX data
+void DMXESPSerial::write(int Channel, uint8_t value) {
+  if (dmxStarted == false) init();
+
+  if (Channel < 1) Channel = 1;
+  if (Channel > DMXCHANNELS) Channel = DMXCHANNELS;
+  if (value < 0) value = 0;
+  if (value > 255) value = 255;
+
+  dmxDataStore[Channel] = value;
+}
+
+void DMXESPSerial::end() {
+  SERIALPORT.end();
+  dmxStarted = false;
+}
+
+// Function to update the DMX bus
+void DMXESPSerial::update() {
+  if (dmxStarted == false) init();
+
+  //Send break
+  digitalWrite(sendPin, HIGH);
+  SERIALPORT.begin(BREAKSPEED, BREAKFORMAT, receivePin, sendPin);
+  SERIALPORT.write(0);
+  SERIALPORT.flush();
+  delay(1);
+  SERIALPORT.end();
+
+  //send data
+  SERIALPORT.begin(DMXSPEED, DMXFORMAT, receivePin, sendPin);
+  digitalWrite(sendPin, LOW);
+  SERIALPORT.write(dmxDataStore, DMXCHANNELS);
+  SERIALPORT.flush();
+  delay(1);
+  SERIALPORT.end();
+}