Diff: main.cpp

Revision:

0:257c833fe9de

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp	Wed Jun 28 22:26:55 2017 +0000
@@ -0,0 +1,99 @@
+#include "mbed.h"
+#include "ultrasonic.h"
+#include "Dht11.h"
+#include <stdio.h>
+Serial pc(USBTX, USBRX); // tx, rx
+
+// pull down
+DigitalIn b1(D9);
+DigitalIn b2(D8);
+DigitalIn b3(D7);
+DigitalIn b4(D6);
+DigitalIn b5(D5);
+DigitalIn b6(D4);
+DigitalIn b7(D3);
+DigitalIn b8(D2); 
+
+Dht11 tmpSensor(D0);
+
+DigitalIn buttons[8]={b1,b2,b3,b4,b5,b6,b7,b8};
+int buttonNames[] = {1,2,3,4,5,6,7,8};
+
+
+// values for temp/humidity sensor;
+int tempSamples[5];
+int humiSamples[5];
+int counter = 0;
+
+int tempValue = 0;
+int minTemp = 0;
+
+int humiValue = 0;
+int minHumi = 0;
+
+float findMedian(int x[]) {
+    float temp;
+    int i, j;
+    // the following two loops sort the array x in ascending order
+    for(i=0; i < 4; i++) {
+        for(j=i+1; j<5; j++) {
+            if(x[j] < x[i]) {
+                // swap elements
+                temp = x[i];
+                x[i] = x[j];
+                x[j] = temp;
+            }
+        }
+    }
+    return x[2];
+} 
+
+
+
+void averageTH(int temperature, int humidity) {
+    if (counter==5){
+        counter=0; 
+        int medTemp = findMedian(tempSamples);
+        int medHumi = findMedian(humiSamples);
+        if (medTemp >= minTemp && medHumi >= minHumi) {
+            tempValue =  medTemp;
+            humiValue = medHumi;
+            printf("tmp %d\r\n", tempValue); 
+            printf("hum %d\r\n", humiValue);
+        }
+        
+    } else {
+        tempSamples[counter] = temperature;
+        humiSamples[counter] = humidity;
+        counter += 1;
+        //printf("Temperature changed to %dmm\r\n", temperature);
+    }
+
+   
+
+}
+
+void waitforbuttons() {
+    for (int i = 0; i < 8; i++) {
+        DigitalIn button = buttons[i];
+        int name = buttonNames[i];
+        if (button.read() == 0) {
+            pc.printf("button %d\r\n", name);
+        }
+    }
+    wait(0.1);
+}
+
+
+
+int main(){
+    
+    
+    
+    while(1)
+    {
+        tmpSensor.read();
+        averageTH(tmpSensor.getFahrenheit(), tmpSensor.getHumidity());
+        waitforbuttons();
+    }
+ }
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