Diff: main.cpp

Revision:

0:9d07fa1b15a7

Child:

1:f9f5db2931e9

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp	Thu Jan 17 11:12:32 2019 +0000
@@ -0,0 +1,31 @@
+#include "mbed.h"
+ 
+DigitalOut myled(LED1);
+InterruptIn sensor(PTB10-§);
+ 
+Serial pc(USBTX, USBRX);
+ 
+int NbTopsFan;
+int Calc;
+ 
+void rpm()     //This function increments on the rising edge of the hall effect sensors signal
+{ 
+  NbTopsFan++;  
+} 
+ 
+int main() {
+    
+    while(1) {
+        
+        NbTopsFan = 0;                  //Set NbTops to 0 ready for calculations
+        myled=1;
+        sensor.rise(&rpm);              //Enables rising edge interrupt
+        wait_ms(1000);                  //Wait 1 second and count HALL pulses
+        sensor.rise(NULL);              //Disable interrupt
+        myled=0;
+        
+        Calc = (NbTopsFan * 60) / 7.5;  //(Pulse frequency x 60) / 7.5Q, = flow rate in L/hour 
+        
+        pc.printf ("Flow L/hour: %d\r\n",Calc);  //Prints the number calculated above        
+    }
+}
\ No newline at end of file