Comparing two output

Projects Programming
19

the closing bracket is missed here but in this code Tx will change correctely :


#include "tc_lib.h"

using namespace arduino_due;

#define CAPTURE_TIME_WINDOW 2500000 // usecs
#define ANALOG_PIN 7
#define ANALOG_VALUE 127 // values in the interval [0,255] 


capture_tc0_declaration();
auto& capture_pin2=capture_tc0;
volatile float Tx = 0 ;

volatile float f ;

volatile float t = 0 ;
 
volatile int m = 0 ;

void setup() {
 
  Serial.begin(19200);
   Serial3.begin(38400);

  capture_pin2.config(CAPTURE_TIME_WINDOW);
attachInterrupt(digitalPinToInterrupt(2), measure , LOW );

}

 void measure (){
  uint32_t status,duty,period;
  status=capture_pin2.get_duty_and_period(duty,period);

 t = (static_cast<double>(duty)/static_cast<double>(capture_pin2.ticks_per_usec()) );
  if ( (t > 1400) && (t < 1600))
{  Tx = t ;}


 }
void loop() {


  delay(20);
  
Serial.println(Tx);
}

but at the moment i put " f " in it to save the value of " Tx " , it stops changing
the code is here for comparing " f " and " Tx " :


#include "tc_lib.h"

using namespace arduino_due;

#define CAPTURE_TIME_WINDOW 2500000 // usecs
#define ANALOG_PIN 7
#define ANALOG_VALUE 127 // values in the interval [0,255] 


capture_tc0_declaration();
auto& capture_pin2=capture_tc0;
volatile float Tx = 0 ;

volatile float f ;

volatile float t = 0 ;
 
volatile int m = 0 ;

void setup() {
 
  Serial.begin(19200);
   Serial3.begin(38400);

  capture_pin2.config(CAPTURE_TIME_WINDOW);
attachInterrupt(digitalPinToInterrupt(2), measure , LOW );

}

 void measure (){
  uint32_t status,duty,period;
  status=capture_pin2.get_duty_and_period(duty,period);

 t = (static_cast<double>(duty)/static_cast<double>(capture_pin2.ticks_per_usec()) );
  if ( (t > 1400) && (t < 1600))
{  Tx = t ;}


 }
void loop() {
if (Tx - f > 5)
{
  
 f = Tx;
 
  m++;

}
  delay(20);  
 Serial.println(m);
}