46 lines
1.4 KiB
C++
46 lines
1.4 KiB
C++
#ifndef COLPORT_PCA9655E_H
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#define COLPORT_PCA9655E_H
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#include <Arduino.h>
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#include <inttypes.h>
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#include <Wire.h>
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#include <ColPort.h>
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#include "IOExpanderPort.h"
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/* One PCA9655E I/O expander port connected to matrix columns.
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PCA9655E does not have internal pull-up resistors (PCA9535E does).
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Instantiation
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------------
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colPins parameter 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 for column port 0, with pins 2 and 3 connected to columns:
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IOExpanderPort port0(0, 0);
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ColPort_PCA9655E colPort0(port0, 2<<0 | 1<<3 );
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Example instantiation for column port 1, with pins 2 and 3 connected to columns:
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IOExpanderPort port1(1, 0);
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ColPort_PCA9655E colPort1(port1, 2<<0 | 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_PCA9655E : public ColPort
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{
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private:
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IOExpanderPort& port;
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const uint8_t configurationByteCommand;
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const uint8_t inputByteCommand;
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public:
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//The constructor initialization list is in .cpp
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ColPort_PCA9655E(IOExpanderPort& port, const uint8_t colPins);
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void begin();
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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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