Initial commit

README.md

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+# Learn Arduino
+
+Experiments in learning arduino and communication protocols

python_serial/.gitignore

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+env/

python_serial/serial_client.py

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+#!/usr/bin/env python3
+"""
+A very basic serial client that can unpack a binary 32 int from a message
+and print it to the console.
+
+message: b'H<bytes>\r\n'
+"""
+
+import serial
+
+PORT = '/dev/cu.usbmodem2667001'
+
+def main():
+    print('Connecting to serial port: ', PORT)
+    with serial.Serial(PORT, 9600, timeout=1) as ser:
+        _ = ser.readline()
+        print('Connection made')
+        while True:
+            msg = ser.readline()
+            val = int.from_bytes(msg[1:-2], byteorder='little', signed=False)
+            print('Recieved: ', val)
+
+
+if __name__ == '__main__':
+    main()

teensy/Binary/Binary.ino

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+/*
+  Binary Send
+
+  This code is meant to demonstrate the sending of binary information
+  from the arduino to a serial client. See the serial_client.py file
+  which can read the payload being sent
+
+*/
+
+unsigned int large_number = 3257493648;
+/*
+Decimal: 3257493648
+Hex: C2296890
+Binary: 11000010 00101001 01101000 10010000
+b1 byte: 11000010
+b1 hex: C2
+b2 byte: 101001
+b2 hex: 29
+b3 byte: 1101000
+b3 hex: 68
+b4 byte: 10010000
+b4 hex: 90
+Number: 11000010001010010110100010010000
+ */
+
+// unpacks the int into bytes
+byte b1 = large_number >> 24; 
+byte b2 = large_number >> 16;
+byte b3 = large_number >> 8;
+byte b4 = large_number;
+
+// Places the bytes in little endian
+byte byteBuffer[4] = {b4, b3, b2, b1};
+
+void setup() {
+  //Initialize serial and wait for port to open:
+  Serial.begin(9600);
+  while (!Serial) {
+    ; // wait for serial port to connect. Needed for native USB port only
+  }
+
+  // prints title with ending line break
+  Serial.print("Decimal: ");Serial.print(large_number);  Serial.println();
+  Serial.print("Hex: ");Serial.print(large_number, HEX);  Serial.println();
+  Serial.print("Binary: ");Serial.print(large_number, BIN);  Serial.println();
+  Serial.print("b1 byte: ");Serial.print(b1, BIN);  Serial.println();
+  Serial.print("b1 hex: ");Serial.print(b1, HEX);  Serial.println();
+  Serial.print("b2 byte: ");Serial.print(b2, BIN);  Serial.println();
+  Serial.print("b2 hex: ");Serial.print(b2, HEX);  Serial.println();
+  Serial.print("b3 byte: ");Serial.print(b3, BIN);  Serial.println();
+  Serial.print("b3 hex: ");Serial.print(b3, HEX);  Serial.println();
+  Serial.print("b4 byte: ");Serial.print(b4, BIN);  Serial.println();
+  Serial.print("b4 hex: ");Serial.print(b4, HEX);  Serial.println();
+  Serial.print("Number: "); Serial.print(large_number, BIN);  Serial.println();
+  Serial.println("---------------------------------");
+  Serial.print("high byte: ");Serial.print(highByte(large_number >> 16), BIN);  Serial.println();
+  Serial.print("high hex: ");Serial.print(highByte(large_number >> 16), HEX);  Serial.println();
+  Serial.print("low byte: ");Serial.print(lowByte(large_number >> 16), BIN);  Serial.println();
+  Serial.print("low hex: ");Serial.print(lowByte(large_number >> 16), HEX);  Serial.println();
+  Serial.println("---------------------------------");
+  Serial.print("high byte: ");Serial.print(highByte(large_number), BIN);  Serial.println();
+  Serial.print("high hex: ");Serial.print(highByte(large_number), HEX);  Serial.println();
+  Serial.print("low byte: ");Serial.print(lowByte(large_number), BIN);  Serial.println();
+  Serial.print("low hex: ");Serial.print(lowByte(large_number), HEX);  Serial.println();
+
+}
+
+void loop() {
+  Serial.write('H');
+  Serial.write(byteBuffer, sizeof(byteBuffer));
+  Serial.println();
+  delay(1000);
+  
+}

teensy/Blink/Blink.ino

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+/*
+  Blink
+  Turns on an LED on for one second, then off for one second, repeatedly.
+
+  This example code is in the public domain.
+ */
+
+// Pin 13 has an LED connected on most Arduino boards.
+// Pin 11 has the LED on Teensy 2.0
+// Pin 6  has the LED on Teensy++ 2.0
+// Pin 13 has the LED on Teensy 3.0
+// give it a name:
+int led = 13;
+
+// the setup routine runs once when you press reset:
+void setup() {
+  // initialize the digital pin as an output.
+  pinMode(led, OUTPUT);
+}
+
+// the loop routine runs over and over again forever:
+void loop() {
+  digitalWrite(led, HIGH);   // turn the LED on (HIGH is the voltage level)
+  delay(100);               // wait for a second
+  digitalWrite(led, LOW);    // turn the LED off by making the voltage LOW
+  delay(100);               // wait for a second
+}