main.cpp

00001 #include"mbed.h"
00002 #include"Air_Quality.h"
00003 AirQuality airqualitysensor;
00004 int current_quality = -1;
00005 PinName analogPin = p15;
00006 
00007 // Interrupt Handler
00008 void AirQualityInterrupt()
00009 {
00010     AnalogIn sensor(analogPin);
00011     airqualitysensor.last_vol = airqualitysensor.first_vol;
00012     airqualitysensor.first_vol = sensor.read()*1000;
00013     airqualitysensor.timer_index = 1;
00014 }
00015 
00016 // Main loop
00017 int main()
00018 {
00019     airqualitysensor.init(analogPin, AirQualityInterrupt);
00020     while(1) {
00021         current_quality=airqualitysensor.slope();
00022         if (current_quality >= 0) { // if a valid data returned.
00023             if (current_quality == 0)
00024                 printf("High pollution! Force signal active\n\r");
00025             else if (current_quality == 1)
00026                 printf("High pollution!\n\r");
00027             else if (current_quality == 2)
00028                 printf("Low pollution!\n\r");
00029             else if (current_quality == 3)
00030                 printf("Fresh air\n\r");
00031         }
00032     }
00033 }