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67 lines
1.5 KiB
C++
67 lines
1.5 KiB
C++
//
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// FILE: PinOutGroup.cpp
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// AUTHOR: Rob Tillaart
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// VERSION: 0.1.0
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// DATE: 2017-04-26
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// PURPOSE: PinOutGroup library for Arduino
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// goal is to easily change a group of pins that logically
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// belong to each other e.g. 8 data pins of a parallel printer.
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// these pins can be in any order.
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// URL: http://forum.arduino.cc/index.php?topic=469599.0
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//
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// Released to the public domain
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//
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// 0.1.0 - initial version (based upon experimental pinGroup)
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//
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#include "PinOutGroup.h"
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PinOutGroup::PinOutGroup()
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{
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_size = 0;
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}
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bool PinOutGroup::add(uint8_t s, int* ar, uint8_t value) // value = HIGH LOW
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{
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bool b = true;
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for (uint8_t i = 0; i < s; i++)
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{
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b = b && add(ar[i], value);
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}
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return b;
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}
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bool PinOutGroup::add(uint8_t pin, uint8_t value) // value = HIGH LOW
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{
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if (_size < PINOUTGROUP_MAXSIZE)
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{
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_pins[_size] = pin; // BUG pin can be added multiple time.
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pinMode(pin, OUTPUT);
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digitalWrite(pin, value);
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_size++;
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return true;
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}
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return false;
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}
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uint8_t PinOutGroup::set(uint16_t value)
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{
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uint16_t changed = _lastValue ^ value; // detect pins that changed
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if (changed == 0) return 0;
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uint16_t bitMask = 1;
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uint8_t changeCount = 0;
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for (uint8_t i = 0; i < _size; i++)
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{
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if ((changed & bitMask) > 0)
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{
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digitalWrite(_pins[i], (value & bitMask) > 0);
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changeCount++;
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}
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bitMask <<= 1;
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}
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_lastValue = value;
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return changeCount;
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}
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// --- END OF FILE ---
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