dumped all my old arduino stuff in here.

Temp/Temp.pde

@@ -0,0 +1,113 @@
+
+
+#include <Wire.h>
+
+#define BUTTON1  2
+#define BUTTON2  3
+
+// ds1621 has 0x9(b1001) A0 A1 A2
+#define DS1621_ADDR ((0x9 << 3) | 0x00)
+
+// start up ds1621
+void ds1621_init()
+{
+  
+  Serial.print(DS1621_ADDR, HEX);
+  // write 0x2 to config register 0xac
+  Wire.beginTransmission(DS1621_ADDR);
+  Wire.send(0xac);
+  Wire.send(0x02);
+  Wire.endTransmission();
+  delay(20);
+
+  // tell the ds1621 to start measuring temperature
+  Wire.beginTransmission(DS1621_ADDR);
+  Wire.send(0xEE);
+  Wire.endTransmission();   
+}
+
+// read temperature
+unsigned int ds161_read_temp()
+{
+  unsigned int data;
+
+  // tell ds1621 that we want to read register 0xaa (the temperature is in there)
+  Wire.beginTransmission(DS1621_ADDR);
+  Wire.send(0xaa);
+  Wire.endTransmission();
+
+  // start reading the 2 bytes of temp data  
+  Wire.beginTransmission(DS1621_ADDR);
+  Wire.requestFrom(DS1621_ADDR, 2);
+  if(Wire.available())
+    data = Wire.receive() << 8;
+  if(Wire.available())
+    data |= Wire.receive();
+  return data;
+}
+
+// format and output the temperature read from a ds1621
+void ds1621_print_temp(int temp)
+{
+   if(temp & 0x8000)
+    Serial.print("-");
+  else
+    Serial.print("");
+  temp &= 0x7fff;
+  Serial.print(temp >> 8);
+  if(temp & 0xff)
+     Serial.print(",5");
+  else
+    Serial.print(",0");
+  Serial.print("\n");
+  delay(1000); 
+}
+int a = 0;
+// this function is called everytime button1 is pressed
+void button1_isr(void)
+{
+//  Serial.print("button1\n"); 
+  a= 1;
+}
+
+// this function is called everytime button2 is pressed
+void button2_isr(void)
+{
+  //Serial.print("button2\n"); 
+  a=2;
+}
+
+void setup()
+{
+
+  pinMode(13, OUTPUT);  //we'll use the debug LED to output a heartbeat
+
+  // start serial
+  Serial.begin(9600);
+
+  // start i2c
+  Wire.begin();
+  
+  // start thermometer
+  ds1621_init();   
+  
+  // setup button gpio 
+  // gpio is input and internal pullup enabled
+  pinMode(BUTTON1, INPUT);
+  pinMode(BUTTON2, INPUT);
+  digitalWrite(BUTTON1, HIGH);
+  digitalWrite(BUTTON2, HIGH);
+
+  // give both buttons an interrupt handler
+  attachInterrupt(0, button1_isr, FALLING);
+  attachInterrupt(1, button2_isr, FALLING);
+  interrupts();
+}
+
+void loop()
+{
+
+  int temp = ds161_read_temp();
+  ds1621_print_temp(temp);
+  delay(1000);
+}