mirror of
https://github.com/RobTillaart/Arduino.git
synced 2024-10-03 18:09:02 -04:00
79 lines
1.4 KiB
C++
79 lines
1.4 KiB
C++
//
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// FILE: demo_cache.ino
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// AUTHOR: Rob Tillaart
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// PURPOSE: demo
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// URL: http://www.adafruit.com/products/1002
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// URL: https://github.com/RobTillaart/HT16K33
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#include "HT16K33.h"
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HT16K33 seg(0x70);
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uint32_t start, stop, d1, d2;
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void setup()
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{
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Serial.begin(115200);
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Serial.println(__FILE__);
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seg.begin();
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Wire.setClock(100000);
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seg.displayOn();
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seg.brightness(2);
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seg.displayClear();
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seg.blink(0);
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}
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void loop()
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{
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// Note: UNO fails for speed above 850K
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// UNO 750K and 800K are using same clock divider
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Serial.println("\nSPEED \tNOCACHE \tms/call \tCACHE\t\tms/call \tRATIO");
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for (uint32_t sp = 100000; sp < 900000; sp += 50000)
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{
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test_cache(sp);
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}
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Serial.println();
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}
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void test_cache(uint32_t speed)
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{
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Wire.setClock(speed);
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Serial.print(speed);
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Serial.print("\t");
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seg.cacheOff();
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start = millis();
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for (int16_t counter = -999; counter < 10000; counter+=10)
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{
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seg.displayInt(counter);
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}
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d1 = millis() - start;
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Serial.print(d1);
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Serial.print("\t\t");
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Serial.print(d1 / 1100.0, 3);
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Serial.print("\t\t");
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delay(100);
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seg.cacheOn();
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start = millis();
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for (int16_t counter = -999; counter < 10000; counter+=10)
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{
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seg.displayInt(counter);
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}
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d2 = millis() - start;
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Serial.print(d2);
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Serial.print("\t\t");
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Serial.print(d2 / 1100.0, 3);
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Serial.print("\t\t");
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Serial.println(1.0 * d1 / d2, 3);
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delay(1000);
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}
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// -- END OF FILE --
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