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https://github.com/RobTillaart/Arduino.git
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59 lines
982 B
C++
59 lines
982 B
C++
//
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// FILE: demo_dual1.ino
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// AUTHOR: Rob Tillaart
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// VERSION: 0.2.0
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// PURPOSE: demo 2 I2C 4x7segment displays one uint32_t unsigned long
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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 left(0x71);
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HT16K33 right(0x70);
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uint32_t counter = 0;
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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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left.begin();
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right.begin();
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Wire.setClock(100000);
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left.displayOn();
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right.displayOn();
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Serial.println("dual displayTest");
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}
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void loop()
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{
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display_ulong(counter);
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delay(1);
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counter++;
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}
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void display_ulong(uint32_t value)
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{
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uint16_t lval = value / 10000;
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uint16_t rval = value % 10000;
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// left show no digit if not needed
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left.setDigits(0);
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// right show at least 1 digit if value < 10000, otherwise leading zero's needed
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right.setDigits(lval > 0 ? 4 : 0);
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left.displayInt(lval);
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right.displayInt(rval);
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}
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// -- END OF FILE --
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