Diff: main.cpp

Revision:

0:8fcaf7cf5b69

diff -r 000000000000 -r 8fcaf7cf5b69 main.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp	Tue Mar 22 21:58:17 2016 +0000
@@ -0,0 +1,60 @@
+/*
+ Hotboards temp Library - setting alarms
+ Set upper and lower alarms and trhoug pin PB_13 monitor the ALERT signal, turn on a led when the
+ temperature is below or above the alarm values.
+ The circuit 
+ *  VDD   -->  3.3v
+ *  SDA   -->  PB_9
+ *  SCL   -->  PB_8
+ *  ALERT -->  PB_13
+ *  GND   -->  GND
+ Library and example created by Diego from Hotboards
+ Ported to mbed by Pedro from Hotboards
+ This example code is in the public domain.
+ */
+#include "mbed.h"
+#include "Hotboards_temp.h"
+
+// input pin for reading the alert signal
+DigitalIn Alert(PB_13);
+// Onboard led
+DigitalOut myLed( LED1 );
+//new serial port instance
+Serial pc(USBTX, USBRX);
+//I2C bus instance for the library
+I2C device( I2C_SDA, I2C_SCL ); 
+// instance a sensor with address number 7 (none of the jumpers on the board is short circuited)
+// and also 0.5 celsius degrees resolution
+Hotboards_temp sensor( device, Sensor_7);
+
+
+
+int main( void ) 
+{
+    
+    // init sensor
+    sensor.init();
+    // set lower alarm to 0.0 C and upper alarm to 26.0 C. We assume the eviromental temp is around
+    // 23-32 degrees
+    sensor.setAlarms( 0.0, 30.0 );
+ 
+    while(1)
+    {  
+         // sense the ALERT signal and turn on/off the led on your Nucleo board
+         if(Alert == 0) 
+         {
+            myLed = 1;
+         }
+         else
+         {
+             myLed =0;
+         }
+         
+         // read temperature in celcius degrees
+         float temp = sensor.read();
+         // print it on the serial port
+         pc.printf("Temp sensor 1: %3.1f C\r\n",temp);
+         // take the next value after 2 sec (just to not read too often)
+         wait(2);
+    }
+}
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