Diff: human_detector.cpp

Revision:

0:6e8da69e6440

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/human_detector.cpp	Sat Nov 19 22:38:58 2016 +0000
@@ -0,0 +1,37 @@
+#include "mbed.h"
+#include "human_detector.h"
+
+static const char CLS[] = "\x1B[2J";        // VT100 erase screen
+static const char HOME[] = "\x1B[H";        // VT100 home
+static const float DEBOUNCING_DELAY = 0.2;
+enum state { OFF = 0, ON = 1 };
+
+int main() 
+{
+    clear_screen();
+    while (true) 
+    {        
+        init(potout, led);
+        while (!potin) {} // wait until there's a pot (capacitor) charge
+        alarm(led);
+    }
+}
+
+void clear_screen()
+{
+    pc.printf(CLS);      
+    pc.printf(HOME);               
+}
+
+void init(DigitalOut& pot, DigitalOut& led)
+{
+    pot = ON;
+    led = OFF;
+}
+
+void alarm(DigitalOut& led)
+{
+    led = ON;
+    pc.printf("Human detected\r\n");    
+    wait(DEBOUNCING_DELAY);
+}