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70 lines
1.3 KiB
C++
70 lines
1.3 KiB
C++
//
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// FILE: fastShiftIn.ino
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// AUTHOR: Rob Tillaart
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// VERSION: 0.1.00
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// PURPOSE: test sketch
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// URL:
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//
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// Released to the public domain
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//
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#include "FastShiftIn.h"
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FastShiftIn FSI(12, 13, LSBFIRST);
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volatile int x = 0;
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void setup()
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{
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Serial.begin(115200);
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Serial.print("example fastShiftIn: ");
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Serial.println(FASTSHIFTIN_LIB_VERSION);
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digitalWrite(12, HIGH);
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Serial.println("\n 8 bits HIGH\n");
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Serial.println("\nPerformance - time in us");
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uint32_t start = micros();
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for (int i=0; i<100; i++)
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{
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x = FSI.read();
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}
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uint32_t duration = micros() - start;
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Serial.print("FastShiftIn1: ");
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Serial.println(duration/100.0, 1);
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start = micros();
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for (int i=0; i<100; i++)
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{
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x = FSI.read();
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x = FSI.read();
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}
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duration = micros() - start;
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Serial.print("FastShiftIn2: ");
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Serial.println(duration/100.0, 1);
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start = micros();
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for (int i=0; i<10000; i++)
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{
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x = shiftIn(12, 13, LSBFIRST);
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}
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duration = micros() - start;
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Serial.print("Standard shiftIn1: ");
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Serial.println(duration/10.0, 1);
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start = micros();
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for (int i=0; i<10000; i++)
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{
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x = shiftIn(12, 13, LSBFIRST);
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x = shiftIn(12, 13, LSBFIRST);
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}
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duration = micros() - start;
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Serial.print("Standard shiftIn2: ");
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Serial.println(duration/10.0, 1);
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}
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void loop()
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{
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}
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