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add Port_MCP23S18

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wolfv6 2016-11-16 08:46:40 -07:00
parent 45674eb9b9
commit ad1b3b2289
5 changed files with 36 additions and 7 deletions
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2
src/Port_MCP23017.h
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@ -5,7 +5,7 @@
#include <Wire.h> #include <Wire.h>
#include <PortInterface.h> #include <PortInterface.h>
/* /* Port_MCP23017
write pins are connected to matrix Row (strobe pin) or LED. write pins are connected to matrix Row (strobe pin) or LED.
readPins are connected to matrix column to read which keys are pressed. readPins are connected to matrix column to read which keys are pressed.

3
src/Port_MCP23018.h
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@ -1,7 +1,8 @@
#ifndef PORT_MCP23018_H #ifndef PORT_MCP23018_H
#define PORT_MCP23018_H #define PORT_MCP23018_H
#include "Port_MCP23017.h" #include "Port_MCP23017.h"
/*
/* Port_MCP23018
write pins are connected to matrix Row (strobe pin) or LED. write pins are connected to matrix Row (strobe pin) or LED.
readPins are connected to matrix column to read which keys are pressed. readPins are connected to matrix column to read which keys are pressed.

2
src/Port_MCP23S17.h
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@ -5,7 +5,7 @@
#include <SPI.h> #include <SPI.h>
#include <PortInterface.h> #include <PortInterface.h>
/* /* Port_MCP23S17
write pins are connected to matrix Row (strobe pin) or LED. write pins are connected to matrix Row (strobe pin) or LED.
readPins are connected to matrix column to read which keys are pressed. readPins are connected to matrix column to read which keys are pressed.

31
src/Port_MCP23S18.h Normal file
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@ -0,0 +1,31 @@
#ifndef PORT_MCP23S18_H
#define PORT_MCP23S18_H
#include "Port_MCP23S17.h"
/* Port_MCP23S18 has not been tested.
write pins are connected to matrix Row (strobe pin) or LED.
readPins are connected to matrix column to read which keys are pressed.
Port_MCP23S18 can only be active low (Scanner_IOE::activeState = LOW).
Open-drain active high would not work because pull down resistors have no effect on sink.
https://en.wikipedia.org/wiki/Open_collector
Use LED_PortOpenDrain class for indicator LEDs.
Example instantiation:
const uint8_t IOE_ADDR = 0x20; //MCP23S18 address pin grounded
Port_MCP23S18 portB(IOE_ADDR, 1, 0); //all pins are set to output for strobes and LEDs
Port_MCP23S18 portA(IOE_ADDR, 0, 1<<0 | 1<<1 ); //pin 0 and pin 1 are set to input for reading,
//remaining pins can be used for LEDs
Diode orientation
----------------
Diode orientation is explained in keybrd_library_user_guide.md > Diode orientation
*/
class Port_MCP23S18 : public Port_MCP23S17
{
public:
Port_MCP23S18(const uint8_t deviceAddr, const uint8_t portNum, const uint8_t readPins)
: Port_MCP23S17(deviceAddr, portNum, readPins) {}
};
#endif

5
src/Port_PCA9655E.h
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@ -5,7 +5,7 @@
#include <Wire.h> #include <Wire.h>
#include <PortInterface.h> #include <PortInterface.h>
/* /* Port_PCA9655E
write pins are connected to matrix Row (strobe pin) or LED. write pins are connected to matrix Row (strobe pin) or LED.
readPins are connected to matrix column to read which keys are pressed. readPins are connected to matrix column to read which keys are pressed.
@ -29,9 +29,6 @@ Diode orientation
---------------- ----------------
Diode orientation is explained in keybrd_library_user_guide.md > Diode orientation Diode orientation is explained in keybrd_library_user_guide.md > Diode orientation
PCA9655E data sheet
----------------
http://www.onsemi.com/pub_link/Collateral/PCA9655E-D.PDF
*/ */
class Port_PCA9655E : public PortInterface class Port_PCA9655E : public PortInterface