Diff: main.cpp

Revision:

0:caf81a29d035

diff -r 000000000000 -r caf81a29d035 main.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp	Sat Sep 29 19:14:08 2018 +0000
@@ -0,0 +1,35 @@
+#include "mbed.h"
+#define NUM_COUNTS 2
+ 
+InterruptIn button(PB_9);
+DigitalOut simulation(PA_8);
+int count;
+float t1 = 0, total = 0, RPM;
+Timer t;
+Serial pc(PA_9, PA_10); // tx and rx
+ 
+void flip() {
+    t.start();
+    count++;
+    total += t.read_ms() - t1;
+    t1 = t.read_ms();
+}
+ 
+int main() {
+    button.rise(&flip);  // attach the address of the flip function to the rising edge
+    while(1) {           // wait around, interrupts will interrupt this!
+        if(count >= NUM_COUNTS){
+            t.stop();
+            RPM = ((NUM_COUNTS-1)/(total/1000))*60;
+            pc.printf("%.2f\n",RPM);
+            count = 0;
+            t1 = 0;
+            total = 0;
+            t.reset();
+            }   
+            simulation = 0;
+            wait_ms(24);
+            simulation = 1;
+            wait_ms(1);
+            }
+    }
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