Diff: main.cpp

Revision:

0:0c9628dc60f4

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp	Mon Oct 15 21:26:40 2012 +0000
@@ -0,0 +1,24 @@
+/*Program Example 7.7: Mbed communicates with TMP102 temperature sensor, and scales and displays readings to screen.
+                                                                             */
+#include "mbed.h"
+I2C tempsensor(p9, p10);      //sda, sc1
+Serial pc(USBTX, USBRX);      //tx, rx
+const int addr = 0x90;
+char config_t[3];
+char temp_read[2];
+float temp;
+
+int main() {
+  config_t[0] = 0x01;                    //set pointer reg to 'config register'
+  config_t[1] = 0x60;                    // config data byte1
+  config_t[2] = 0xA0;                    // config data byte2
+  tempsensor.write(addr, config_t, 3);
+  config_t[0] = 0x00;                    //set pointer reg to 'data register'
+  tempsensor.write(addr, config_t, 1);   //send to pointer 'read temp'
+  while(1) {
+    wait(1);
+    tempsensor.read(addr, temp_read, 2);       //read the two-byte temp data
+    temp = 0.0625 * (((temp_read[0] << 8) + temp_read[1]) >> 4);  //convert data
+    pc.printf("Temp = %.2f degC\n\r", temp);
+  }
+}