GY-63_MS5611/libraries/FastShiftIn/examples/fastShiftIn/fastShiftIn.ino

//
//    FILE: fastShiftIn.ino
//  AUTHOR: Rob Tillaart
// VERSION: 0.1.01
// PURPOSE: test sketch
//     URL:
//
// Released to the public domain
//

#include "FastShiftIn.h"

FastShiftIn FSI(12, 13, LSBFIRST);

volatile int x = 0;

void setup()
{
  Serial.begin(115200);
  Serial.print("example fastShiftIn: "); 
  Serial.println(FASTSHIFTIN_LIB_VERSION);

  digitalWrite(12, HIGH);
  Serial.println("\n 8 bits HIGH\n"); 

  Serial.println("\nPerformance - time in us"); 
  uint32_t start = micros();
  for (int i=0; i<1000; i++)
  {
    x = FSI.read();
  }
  uint32_t duration1 = micros() - start;
  Serial.print("FastShiftIn1: ");
  Serial.println(duration1 * 0.001);

  start = micros();
  for (int i=0; i<1000; i++)
  {
    x = FSI.read();
    x = FSI.read();
  }
  uint32_t duration2 = micros() - start;
  Serial.print("FastShiftIn2: ");
  Serial.println(duration2 * 0.001);
  Serial.print("       Delta: ");
  Serial.println((duration2-duration1)* 0.001);
  Serial.println();


  start = micros();
  for (int i=0; i<1000; i++)
  {
    x = shiftIn(12, 13, LSBFIRST);
  }
  duration1 = micros() - start;
  Serial.print("Standard shiftIn1: ");
  Serial.println(duration1* 0.001);

  start = micros();
  for (int i=0; i<1000; i++)
  {
    x = shiftIn(12, 13, LSBFIRST);
    x = shiftIn(12, 13, LSBFIRST);
  }
  duration2 = micros() - start;
  Serial.print("Standard shiftIn2: ");
  Serial.println(duration2 * 0.001);
  Serial.print("            Delta: ");
  Serial.println((duration2-duration1) * 0.001);
  Serial.println();

  Serial.println("done...");
}

void loop()
{
}