32 lines
962 B
C++
32 lines
962 B
C++
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#include "ColPort_PCA9655E.h"
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/*
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configures column port's configuration, input, and pins.
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*/
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ColPort_PCA9655E::ColPort_PCA9655E
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(IOExpanderPort& port, const uint8_t colPins)
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: ColPort(colPins), port(port), configurationByteCommand(port.num + 6), inputByteCommand(port.num)
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{}
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void ColPort_PCA9655E::begin()
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{
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Wire.beginTransmission(port.ADDR);
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Wire.write(configurationByteCommand);
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Wire.write(colPins); //0=configure as output (for LED), 1=configure as input (for read)
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Wire.endTransmission();
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}
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/*
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Saves all port-pin values to portState.
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*/
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void ColPort_PCA9655E::read()
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{
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Wire.beginTransmission(port.ADDR);
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Wire.write(inputByteCommand); //input immediately before requestFrom
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Wire.endTransmission(false); //PCA9655E needs false to send a restart
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Wire.requestFrom(port.ADDR, 1u); //request one byte from input port
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portState = Wire.read();
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}
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