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--- workshop:i2c [2012/08/13 14:06] – created donghee
+++ workshop:i2c [2018/07/18 14:10] (current) – external edit 127.0.0.1
@@ Line 1: / Line 1: @@
 ====== I2C ======
 I2C직렬 컴퓨터 버스주변기기를 연결하기 위해 사용된다.
@@ Line 15: / Line 16: @@
 {{http://i.imgur.com/dgtdQ.png?300}}
-실제 실험 해보기
+===== 실제 실험 해보기 =====
-LC256
 arduino i2c 관련 핀
@@ Line 25: / Line 26: @@
 {{http://i.imgur.com/VQtTJ.png?300}}
+==== 24LC256, EEPROM ====
 {{{
@@ Line 69: / Line 72: @@
   Wire.begin(); //Start I2C connections
   Serial.begin(9600);
-  i2c_eeprom_write_page(0x50, 0, (byte *)data, sizeof(data)); // write to EEPROM
+  //i2c_eeprom_write_page(0x50, 0, (byte *)data, sizeof(data)); // write to EEPROM
   delay(10); //add a small delay
@@ Line 98: / Line 101: @@
 {{http://i.imgur.com/NE9xJ.png?300}}
+==== Tmp102 ====
+{{{
+#include <Wire.h>
+int tmp102Address = 0x48;
+void setup(){
+  Serial.begin(9600);
+  Wire.begin();
+}
+void loop(){
+  float celsius = getTemperature();
+  Serial.print("Celsius: ");
+  Serial.println(celsius);
+  float fahrenheit = (1.8 * celsius) + 32;
+  Serial.print("Fahrenheit: ");
+  Serial.println(fahrenheit);
+  delay(200); //just here to slow down the output. You can remove this
+}
+float getTemperature(){
+  Wire.requestFrom(tmp102Address,2);
+  byte MSB = Wire.read();
+  byte LSB = Wire.read();
+  //it's a 12bit int, using two's compliment for negative
+  int TemperatureSum = ((MSB << 8) | LSB) >> 4;
+  float celsius = TemperatureSum*0.0625;
+  return celsius;
+}
+}}}