Add i2c example to read temperature from LM75B IC

Author: pennam

examples/LM75BTemperature/LM75BTemperature.ino

@@ -0,0 +1,42 @@
+/*
+  Breakout Carrier - LM75BTemperature
+  
+  The sketch shows how to read temperature from LM75B using I2C bus of the BreakoutCarrier.
+  
+  The circuit:
+   - Portenta H7
+   - Breakout Carrier
+  
+  This example code is in the public domain.
+*/
+
+#include <Arduino_PortentaBreakoutCarrier.h>
+
+void setup() {
+  Serial.begin(9600);
+  while (!Serial);
+  
+  // Join I2C_1 bus
+  Breakout.I2C_1.begin();
+
+}
+
+void loop() {
+  
+  // Transmit to device 0x48 LM75B default address and select register 0x00
+  Breakout.I2C_1.beginTransmission(0x48);
+  Breakout.I2C_1.write(0x00);  
+  Breakout.I2C_1.endTransmission();
+
+  // Read 2 bytes from temperature register 0x00
+  Breakout.I2C_1.requestFrom(0x48, 2);
+
+  // Convert data into human readable format
+  word regdata = (Breakout.I2C_1.read() << 8) | Breakout.I2C_1.read();
+  float temp = (float(regdata) / 256);
+
+  // Print temperature
+  Serial.println(temp);
+  
+  delay(1000);
+}