39 lines
1.4 KiB
C++
39 lines
1.4 KiB
C++
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#include "Row.h"
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/*
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pressRelease() calls key's press() or release() function if it was pressed or released.
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Both parameters are bitwise.
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*/
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void Row::pressRelease(const uint8_t READ_PIN_COUNT, const read_pins_t debouncedChanged)
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{
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read_pins_t isFallingEdge; //bitwise, 1 means falling edge
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read_pins_t isRisingEdge; //bitwise, 1 means rising edge
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read_pins_t readMask; //bitwise, active read bit is 1
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uint8_t i; //index for ptrsKeys[i] array
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//bit=1 if last debounced changed from 1 to 0, else bit=0
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isFallingEdge = debouncedChanged & ~debounced;
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//bit=1 if last debounced changed from 0 to 1, else bit=0
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isRisingEdge = debouncedChanged & debounced;
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for (readMask=1, i=0; i < READ_PIN_COUNT; readMask<<=1, i++) //for each key in row
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{
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//release before press avoids impossible key sequence
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if (readMask & isFallingEdge) //if key was released
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{
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ptrsKeys[i]->release();
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}
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if (readMask & isRisingEdge) //if key was pressed
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{
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ptrsKeys[i]->press();
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keyWasPressed();
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}
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}
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}
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void Row::keyWasPressed()
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{
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//empty in Row class. To unstick sticky keys, override keyWasPressed() in derived class.
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}
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