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Diff: main.cpp
- Revision:
- 0:caf81a29d035
--- /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); + } + } \ No newline at end of file