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moved PCA9655E port commands from initialization list to Wire.write()

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This commit is contained in:
wolfv6 2016-09-03 17:22:55 -06:00
parent 5c8890312d
commit 1f6b052a21
5 changed files with 10 additions and 28 deletions
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14
src/PortRead_PCA9655E.cpp
View File

@ -1,17 +1,9 @@
#include "PortRead_PCA9655E.h"
/*
configures column port's configuration, input, and pins.
*/
PortRead_PCA9655E::PortRead_PCA9655E (PortIOE& port, const uint8_t readPins)
: port(port), readPins(readPins),
configurationByteCommand(port.num + 6), inputByteCommand(port.num)
{}
void PortRead_PCA9655E::begin()
{
Wire.beginTransmission(port.DEVICE_ADDR);
Wire.write(configurationByteCommand);
Wire.write(port.num + 6); //configuration byte command
Wire.write(readPins); //0=configure as output (for LED), 1=configure as input (for read)
Wire.endTransmission();
}
@ -22,10 +14,10 @@ returns port value
uint8_t PortRead_PCA9655E::read()
{
Wire.beginTransmission(port.DEVICE_ADDR);
Wire.write(inputByteCommand); //input immediately before requestFrom
Wire.write(port.num); //input byte command
Wire.endTransmission(false); //PCA9655E needs false to send a restart
Wire.requestFrom(port.DEVICE_ADDR, 1u); //request one byte from input port
Wire.requestFrom(port.DEVICE_ADDR, 1u); //request one byte from input port
return Wire.read();
}

6
src/PortRead_PCA9655E.h
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@ -30,11 +30,9 @@ class PortRead_PCA9655E : public PortReadInterface
private:
PortIOE& port;
const uint8_t readPins; //bitwise pin configuration, 1 means read pin
const uint8_t configurationByteCommand;
const uint8_t inputByteCommand;
public:
//The constructor initialization list is in .cpp
PortRead_PCA9655E(PortIOE& port, const uint8_t readPins);
PortRead_PCA9655E (PortIOE& port, const uint8_t readPins)
: port(port), readPins(readPins) {}
void begin();
virtual uint8_t read();
};

2
src/PortWrite_MCP23S17.h
View File

@ -31,6 +31,8 @@ Diode orientation is explained in keybrd_library_user_guide.md > Diode orientati
MCP23S17 data sheet
----------------
http://www.onsemi.com/pub_link/Collateral/MCP23S17-D.PDF
WARNING: This class hardcodes Slave Select to Arduino Pin 10 to avoid the speed penalty of digitalWrite
*/
class PortWrite_MCP23S17 : public PortWriteInterface

10
src/PortWrite_PCA9655E.cpp
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@ -1,11 +1,5 @@
#include "PortWrite_PCA9655E.h"
/*
configures column port's configuration and output.
*/
PortWrite_PCA9655E::PortWrite_PCA9655E(PortIOE& port)
: port(port), configurationByteCommand(port.num + 6), outputByteCommand(port.num + 2) {}
/*
If PortRead_PCA9655E is instantiated on the same port, do NOT use PortWrite_PCA9655E::begin().
Otherwise readPins could be overwritten.
@ -13,7 +7,7 @@ Otherwise readPins could be overwritten.
void PortWrite_PCA9655E::begin()
{
Wire.beginTransmission(port.DEVICE_ADDR);
Wire.write(configurationByteCommand);
Wire.write(port.num + 6); //configuration byte command
Wire.write(0); //0=configure as output (for strobe pins and LED)
Wire.endTransmission();
}
@ -36,7 +30,7 @@ void PortWrite_PCA9655E::write(const uint8_t pin, const bool value)
}
Wire.beginTransmission(port.DEVICE_ADDR);
Wire.write(outputByteCommand);
Wire.write(port.num + 2); //output Byte command
Wire.write(port.outputVal);
Wire.endTransmission();
}

6
src/PortWrite_PCA9655E.h
View File

@ -37,12 +37,8 @@ class PortWrite_PCA9655E : public PortWriteInterface
{
private:
PortIOE& port;
const uint8_t configurationByteCommand;
const uint8_t outputByteCommand;
public:
//The constructor initialization list is in .cpp
PortWrite_PCA9655E(PortIOE& port);
PortWrite_PCA9655E(PortIOE& port) : port(port) {}
void begin();
virtual void write(const uint8_t pin, const bool level);