42 lines
1.4 KiB
C
42 lines
1.4 KiB
C
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#ifndef COLPORT_AVR_H
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#define COLPORT_AVR_H
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#include <Arduino.h>
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#include <inttypes.h>
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#include <ColPort.h>
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/* One AVR microcontroller port connected to matrix columns.
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Instantiation
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------------
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The constructor configures column's DDRx and PORTx.
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The 'x' in parameters DDRx, PORTx, and PINx should all be the same letter.
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colPins is port's bitwise pin configuration
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1=configure as input (for pins connected to column)
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0=configure as output (for LED or not connected to a column)
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Example instantiation on column port B, with pins 2 and 3 connected to columns:
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ColPort_AVR colPortB(DDRB, PORTB, PINB, 1<<2 | 1<<3 );
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colPins are read from pin 0 on up.
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Diode orientation
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----------------
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Rows, columns, and diode orientation are explained in Matrix.h
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*/
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class ColPort_AVR : public ColPort
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{
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private:
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const volatile unsigned char& DDR; //Data Direction Register, Direction: 0=Input
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const volatile unsigned char& PORT; //PORT register
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const volatile unsigned char& PIN; //PIN read register
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public:
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//The constructor initialization list is in .cpp
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ColPort_AVR(volatile unsigned char& DDRx, volatile unsigned char& PORTx,
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volatile unsigned char& PINx, const uint8_t colPins);
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//read port and store result in portState
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virtual void read();
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};
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#endif
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