File content as of revision 1:0624feb5a279:

#include "mbed.h"


/*  for the button press device should start reading, then it should stop the loop for button press  */

AnalogIn analog_value(A0);
InterruptIn  button(PA_0);
DigitalOut myled(LED1);
bool workState= false;
 

I2C i2c(PB_11,PB_10);   //sda,scl


const int dev_add_W                  = 0xB6 ; // address with write(0) bit at last////Address must be bit shifted left, 
const int  reg_To_address             = 0x27 ;//temperature of the object pointed 




void read_ecg(bool work)
{
    float meas_r;
    float meas_v;
    int temp;
    float tempC;
    int ack=1;
    
    if(work){
           meas_r = analog_value.read(); // Read the analog input value (value from 0.0 to 1.0 = full ADC conversion range)
           meas_v = meas_r * 3300; // Converts value in the 0V-3.3V range
           
            char cmd[2];
            char reg[1];
            reg[0] = 0x27;
      //     i2c.write(dev_add_W, 1, true);
        //   i2c.read(ack);
           
           i2c.write(dev_add_W);
           i2c.read(ack);
           i2c.write(reg_To_address);
           i2c.read(ack);
           
         //  write (int address, const char *data, int length, bool repeated=false)
           i2c.write(dev_add_W,reg,1,true );
            i2c.read(ack);
            
         //   read (int address, char *data, int length, bool repeated=false)
           i2c.read(dev_add_W, cmd,2,false);
           temp = (cmd[1]<<8)|cmd[0];
           tempC = (0.02*temp) -273.15;
         
           
        
          // Display values
           printf("measure = %f = %.0f mV\n", meas_r, meas_v);
           
           //temp =15143;   
          printf("Temperature : %f \r\n",tempC);
                
        }
    
  
    
    
}
 
void toggle()
{
       myled = !myled; 
       workState = !workState;
       
        
    
        
}
        


int main() {
    
    button.rise(&toggle) ;
    while(1)
    {
        
      button.rise(&toggle) ;
      read_ecg(workState);
      
      wait(1);
        }
   
    
    
}