Обновление до версии 0.3.0

- обновлен elbear_fw_bootloader - добавлена проверка контрольной суммы каждой строки hex файла.
- в модуль работы с АЦП добавлена функция analogReadResolution(). Функция analogRead() теперь возвращает усредненное по 10 измерениям значение.
- общая функция обработки прерываний перенесена в память RAM. Обработчики прерываний модулей External Interrupts и Advanced I/O (функция tone()) так же перенесены в память RAM для увеличения скорости выполнения кода.
- в пакет добавлены библиотеки EEPROM, Servo, SoftSerial, NeoPixel, MFRC522 адаптированные для работы с платой Elbear Ace-Uno.
- добавлено описание особенностей работы с пакетом

libraries/SoftwareSerial/examples/TwoPortReceive/TwoPortReceive.ino

@@ -0,0 +1,99 @@
+/*
+  Software serial multiple serial test
+
+ Receives from the two software serial ports,
+ sends to the hardware serial port.
+
+ In order to listen on a software port, you call port.listen().
+ When using two software serial ports, you have to switch ports
+ by listen()ing on each one in turn. Pick a logical time to switch
+ ports, like the end of an expected transmission, or when the
+ buffer is empty. This example switches ports when there is nothing
+ more to read from a port
+
+ The circuit:
+ Two devices which communicate serially are needed.
+ * First serial device's TX attached to digital pin 2(RX), RX to pin 6(TX)
+ * Second serial device's TX attached to digital pin 8(RX), RX to pin 10(TX)
+
+ Note:
+ Not all pins on the Elbear Ace-Uno support interrupts,
+ so only the following can be used for RX:
+ 2, 3, 4, 5, 8, 9
+ */
+
+#include <SoftwareSerial.h>
+
+// software serial #1: RX = digital pin 2, TX = digital pin 6
+SoftwareSerial portOne(2, 6);
+// software serial #2: RX = digital pin 8, TX = digital pin 10
+SoftwareSerial portTwo(8, 10);
+
+// active port is changed by user button pressing
+volatile bool isPortOneActive = true;
+void btn_pressed_callback(void)
+{
+  // change active port
+  if (isPortOneActive)
+  {
+    portTwo.listen();
+    Serial.println("Port two is listening");
+    isPortOneActive = false;
+  }
+  else
+  {
+    portOne.listen();
+    Serial.println("Port one is listening");
+    isPortOneActive = true;
+  }
+}
+
+void setup() 
+{
+  // Open serial communications and wait for port to open
+  Serial.begin(115200);
+  while (!Serial) {
+    ; // wait for serial port to connect. Needed for native USB port only
+  }
+
+  // attach interrupt to user button
+  attachInterrupt(digitalPinToInterrupt(BTN_BUILTIN), btn_pressed_callback, FALLING);
+
+  // Start each software serial port
+  portOne.begin(57600);
+  portTwo.begin(57600);
+
+  // First listen to port one
+  portOne.listen();
+  isPortOneActive = true;
+  Serial.println("Port one is listening");
+}
+
+void loop() 
+{
+  // check data from port one
+  if (portOne.available())
+  {
+    Serial.println("Data from port one:");
+    // while there is data coming in, read it
+    // and send to the hardware serial port
+    while (portOne.available() > 0) 
+      Serial.write((char)portOne.read());
+    
+    // blank line to separate data from the two ports
+    Serial.println();
+  }
+
+  // check data from port two
+  if (portTwo.available())
+  {
+    Serial.println("Data from port two:");
+    // while there is data coming in, read it
+    // and send to the hardware serial port
+    while (portTwo.available() > 0) 
+      Serial.write((char)portTwo.read());
+    
+    // blank line to separate data from the two ports
+    Serial.println();
+  }
+}