   //fram_init() ;
   
   attachInterrupt(1, isr_tracking, HIGH);
+  attachInterrupt(0, isr_pps, RISING) ;
   GPS.sendCommand(PMTK_STANDBY) ;
 }
 

Adafruit_GPS GPS(&GPSSerial);

uint8_t tracking_en = 0 ;

void setup(void)
{

    interrupts() ;
  }
 }
 
 void isr_pps(void)
 {
   new_data = 1 ;
 }
