main.cpp

00001 #include "mbed.h"
00002 
00003 #define INTERRUPT_MODE
00004 //#define DIGITAL_IN_MODE
00005 
00006 DigitalOut led(D10);
00007 
00008 #ifdef DIGITAL_IN_MODE
00009 //DigitalOut myled(LED1);
00010 DigitalIn  mypin(D9);
00011 #endif
00012 
00013 #ifdef INTERRUPT_MODE
00014 InterruptIn hr(D6);
00015 Ticker  flipper;
00016 #endif
00017 
00018 int hr_cnt = 0; 
00019 
00020 void flip()
00021 {
00022     printf("Beat - int\n");
00023     led = !led;
00024     hr_cnt++;
00025 }
00026 
00027 void calculate(){
00028     hr_cnt = hr_cnt * 6;
00029     printf("Heartrate %d \n", hr_cnt);
00030     hr_cnt = 0;
00031 }
00032 
00033 int read, old_read;
00034 
00035 int main()
00036 {
00037 #ifdef INTERRUPT_MODE
00038     hr.rise(&flip);
00039     flipper.attach(callback(calculate),10); // setup flipper to call flip after 2 seconds
00040 #endif
00041 
00042 
00043 #ifdef DIGITAL_IN_MODE
00044     if(mypin.is_connected()) {
00045         printf("mypin is connected and initialized! \n\r");
00046     }
00047 
00048     // Optional: set mode as PullUp/PullDown/PullNone/OpenDrain
00049     mypin.mode(PullDown);
00050 
00051     read = mypin.read();
00052 
00053     //printf("beat %d \n", read);
00054 
00055     printf("Waiting for heart beat...\n\n");
00056 
00057     while (!mypin.read()) {};
00058     printf("Heart beat detected!\n");
00059 #endif
00060 
00061     while(1) {
00062 
00063 
00064 #ifdef DIGITAL_IN_MODE
00065 
00066         read = mypin.read();
00067         if (read && (old_read != read)) {
00068             printf("Beat\n");
00069         }
00070 
00071         old_read = read;
00072 #endif
00073         //printf("beat %d \n", read);
00074         //printf("hello \n\n");
00075 
00076         //led.write(0);
00077         //wait(1.0);
00078         //led.write(1);
00079         //wait(1.0);
00080 //
00081 //        myled = 1; // LED is ON
00082 //        wait(0.2); // 200 ms
00083 //        myled = 0; // LED is OFF
00084 //        wait(1.0); // 1 sec
00085     }
00086 }