SeeedStudio Grove 101020033, Руководство пользователя

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//will change the state of LED
unsigned char counter ;
unsigned long temp [ 21 ];
unsigned long sub ;
bool data_effect = true ;
unsigned int heart_rate ; //the measurement result of heart rate
const int max_heartpluse_duty = 2000 ; //you can change it follow your
system's request.
//2000 meams 2 seconds. System return error
//if the duty overtrip 2 second.
void setup ()
{
pinMode ( LED , OUTPUT );
Serial . begin ( 9600 );
Serial . println ( "Please ready your chest belt." );
delay ( 5000 );
arrayInit ();
Serial . println ( "Heart rate test begin." );
attachInterrupt ( 0 , interrupt , RISING ); //set interrupt 0,digital port
2
}
void loop ()
{
digitalWrite ( LED , led_state ); //Update the state of the indicator
}
/*Function: calculate the heart rate*/
void sum ()
{
if ( data_effect )
{
heart_rate = 1200000 /( temp [ 20 ]- temp [ 0 ]); //60*20*1000/20_total_time
Serial . print ( "Heart_rate_is:\t" );
Serial . println ( heart_rate );
}
data_effect = 1 ; //sign bit
}
/*Function: Interrupt service routine.Get the sigal from the external
interrupt*/
void interrupt ()
{
temp [ counter ]= millis ();
Serial . println ( counter , DEC );
Serial . println ( temp [ counter ]);