Added a PS1240 'Knock' Sensor

Signed-off-by: Zane W Pickett <[email protected]>

Author: Zane W Pickett

Arduino/Sensor Library/Sound/PS1240/PS1240.pde

@@ -0,0 +1,130 @@
+#include <Wire.h>
+#include <Sensing.h>
+#include <Packet.h>
+/*
+PreDefines|	PacketType	| DataType
+TYPEBOOL	1			  Bool
+TYPEINT		2			  Int
+TYPEFLOAT	3			  Float
+TYPELONG	4			  Long int
+TYPEBYTE	5			  Byte
+TYPETIME	6			  unsigned long
+*/
+
+// User Section: Defines ---------- ---------- ---------- ---------- 
+#define PACKET_TYPE 2			// Use the above table as reference
+#define DATA_TYPE	int
+
+#define DATA_UNIT	"knock"		// 5 char max
+
+#define ADDRESS_TYPE	false	// True = Preset, False = pin based
+#define ADDRESS			2		// Preset Value 
+#define ADDRESS_PINS	8,9,10	// Digital Pins to Address off of 
+// ---------- ---------- ---------- ---------- ---------- ---------- 
+
+Packet<DATA_TYPE> g_packet;
+
+unsigned long g_timeout;
+int g_stage;
+
+// User Section: Sensor Setup	    ---------- ---------- ---------- 
+void input()
+{
+	int tmp = analogRead(0);
+	if (tmp > 0)
+	{
+		if (g_stage == 3)
+			g_stage = 0;
+		g_packet.SetReading(tmp);
+		g_packet.SetStatus(true);
+	}
+	else if ( g_stage == 0)
+	{
+		g_stage = 3;
+	}		
+}
+// ---------- ---------- ---------- ---------- ---------- ---------- 
+
+void setup()
+{
+#if ADDRESS_TYPE
+	SensingNodePreset(ADDRESS);
+#else
+	SensingNodeAddress(ADDRESS_PINS);
+#endif
+	g_packet.SetUnit(DATA_UNIT);
+
+	Serial.begin(9600);
+}
+
+void loop()
+{
+	input();
+}
+
+//////////////////////////////////////////////////////////////////////////
+// Packet Sender
+void SendPacket()
+{
+	// Tell hub the datatype
+	if (g_stage == 0){
+		Wire.send( PACKET_TYPE );
+		g_timeout = millis() + 100;
+
+		// IF TYPENUL, do not stage
+		if (PACKET_TYPE != TYPENULL)
+			g_stage = 1;
+	}
+	// Tell hub data
+	else if (g_stage == 1) 
+	{
+		if (g_timeout > millis())
+			Wire.send((uint8_t *)&g_packet, sizeof(g_packet));
+		g_stage = 0;
+	}
+	// Tell Hub no data
+	else if (g_stage == 3)
+	{
+		Wire.send( TYPENULL );
+	}
+}
+// Initializer: Preset Address
+void SensingNodePreset(unsigned int addr)
+{
+	g_stage = 0;
+	Wire.begin((int)addr);
+	Wire.onRequest( SendPacket );
+}
+// Initializer: Pin Based Address
+void SensingNodeAddress(unsigned int pin0, unsigned int pin1, unsigned int pin2)
+{
+	g_stage = 0;
+	// Activate Pins
+	pinMode(pin0, INPUT);
+	pinMode(pin1, INPUT);
+	pinMode(pin2, INPUT);
+
+	//activate internal pullup resistors
+	digitalWrite(pin0, HIGH); 
+	digitalWrite(pin1, HIGH);
+	digitalWrite(pin2, HIGH);
+
+	bool p0 = digitalRead(pin0), p1 = digitalRead(pin1), p2 = digitalRead(pin2);
+
+	unsigned int plugAddr=0;
+
+	if (!digitalRead(pin0))
+		plugAddr += 1;
+
+	if(!digitalRead(pin1))
+		plugAddr += 2;
+
+	if(!digitalRead(pin2))
+		plugAddr += 4;
+
+	Serial.print("[pinAddr]: ");
+	Serial.println(plugAddr);
+
+	Wire.begin((int)plugAddr + I2C_ADDRESS_BASE);
+	Wire.onRequest( SendPacket );
+}

Arduino/Sensor Library/Sound/PS1240/Readme.md

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+MPX4250A
+===========
+ - Type: Piezo Buzzer
+ - Output:
+ - Model: PS1240
+ - Use: High-performance buzzers that employ 
+unimorph piezoelectric elements and are designed for easy 
+incorporation into various circuits
+
+Resources
+---------
+
+### Techincal Documents
+- <a href="http://www.tdk.co.jp/tefe02/ef532_ps.pdf">Manufacter's Sheet</a>
+
+### Tutorials
+- <a href="http://www.arduino.cc/en/Tutorial/KnockSensor">KnockSensor</a>
+
+Notes
+-----
+
+