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delete PortIOE

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This commit is contained in:
wolfv6 2016-09-24 11:26:08 -06:00
parent fbf4eda206
commit 6c03b007c4
5 changed files with 30 additions and 70 deletions
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38
src/PortIOE.h
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@ -1,38 +0,0 @@
#ifndef PORTIOE_H
#define PORTIOE_H
#include <inttypes.h>
/* The pins of an IC's port can be split between PortWrite, PortRead, and LED.
PortIOE contains outputVal, the value of a port's output register.
outputVal is used for port manipulation by classes PortWrite and LED.
One port's outputVal can be shared by strobe pins and multiple LED pins.
PortIOE is only used by I/O expander port classes.
AVR port classes do not need a similar class because PORTx is global in the Arduino library.
Instantiation
------------
Example PortIOE::DEVICE_ADDR initilization:
const uint8_t PortIOE::DEVICE_ADDR = 0x18;
Be careful with the DEVICE_ADDR.
Table 6 in PCA9655E datasheet lists 8-bit versions of I2C addresses.
The Arduino Wire library uses 7-bit addresses throughout, so drop the low bit.
For example, I2C address with AD2=GND AD1=SCL AD0=SCL,
Table 6 lists 8-bit DEVICE_ADDR = 0x30 (b 00110000)
while Arduino uses 7-bit DEVICE_ADDR = 0x18 (b 00011000)
http://playground.arduino.cc/Main/WireLibraryDetailedReference
The PCA9655E data sheet is on http://www.onsemi.com/pub_link/Collateral/PCA9655E-D.PDF
portNumber: If the I/O expander uses port letters, use 0 inplace of A, use 1 inplace of B.
*/
struct PortIOE
{
static const uint8_t DEVICE_ADDR;
const uint8_t num; //port identification number
uint8_t outputVal; //bit value of output register for LEDs
PortIOE(const uint8_t portNumber)
: num(portNumber), outputVal(0) {}
};
#endif

2
src/PortInterface.h
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@ -9,7 +9,7 @@ Port classes are the keybrd library's interface to microcontroller ports or I/O
class PortInterface
{
public:
virtual void beginProtocol()=0; //SPI or I2C bus
virtual void beginProtocol()=0; //SPI bus or I2C bus
virtual void begin(const uint8_t strobeOn)=0; //configure GPIO pins
virtual void write(const uint8_t strobePin, const bool pinLogicLevel)=0;
virtual uint8_t read()=0;

17
src/PortMCP23S17.cpp
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@ -2,7 +2,8 @@
/* transfer() writes data to registerAddr, reads portSate from registerAddr, and returns portState.
*/
uint8_t PortMCP23S17::transfer(const uint8_t command, const uint8_t registerAddr, const uint8_t data)
uint8_t PortMCP23S17::transfer(const uint8_t command, const uint8_t registerAddr,
const uint8_t data)
{
uint8_t portState; //bit pattern
@ -27,7 +28,7 @@ void PortMCP23S17::beginProtocol()
pinMode(SS, OUTPUT); //configure controller's Slave Select pin to output
digitalWrite(SS, HIGH); //disable Slave Select
SPI.begin();
SPI.beginTransaction(SPISettings (5000000, MSBFIRST, SPI_MODE0)); //control SPI bus, 5 MHz
SPI.beginTransaction( SPISettings(5000000, MSBFIRST, SPI_MODE0) ); //control SPI bus, 5 MHz
//SPI.endTransaction() not called to release SPI bus because keyboard only has one SPI device
}
@ -48,8 +49,8 @@ void PortMCP23S17::begin(const uint8_t strobeOn)
pullUp = 0;
}
transfer(port.DEVICE_ADDR << 1, port.num, readPins); //configure IODIR
transfer(port.DEVICE_ADDR << 1, port.num + 0x0C, pullUp); //configure GPPU
transfer(DEVICE_ADDR << 1, portNum, readPins); //configure IODIR
transfer(DEVICE_ADDR << 1, portNum + 0x0C, pullUp); //configure GPPU
}
/* write() sets pin output to logicLevel (useful for strobePin, one LED pin, or multiple pins).
@ -61,19 +62,19 @@ void PortMCP23S17::write(const uint8_t pin, const bool logicLevel)
{
if (logicLevel == LOW)
{
port.outputVal &= ~pin; //set pin output to low
outputVal &= ~pin; //set pin output to low
}
else
{
port.outputVal |= pin; //set pin output to high
outputVal |= pin; //set pin output to high
}
transfer(port.DEVICE_ADDR << 1, port.num + 0x12, port.outputVal); //set GPIO port to outputVal
transfer(DEVICE_ADDR << 1, portNum + 0x12, outputVal); //set GPIO port to outputVal
}
/* read() returns portState. Only portState pins with pull resistors are valid.
*/
uint8_t PortMCP23S17::read()
{
return transfer( (port.DEVICE_ADDR << 1) | 1, port.num + 0x12, 0); //read from GPIO
return transfer( (DEVICE_ADDR << 1) | 1, portNum + 0x12, 0); //read from GPIO
}

24
src/PortMCP23S17.h
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@ -3,7 +3,6 @@
#include <Arduino.h>
#include <inttypes.h>
#include <SPI.h>
#include <PortIOE.h>
#include <PortInterface.h>
/*
@ -15,15 +14,15 @@ Arduino Pin 10 avoids the speed penalty of digitalWrite.
Instantiation
------------
readPins parameter is configures port's pins.
MCP23S17 datasheet identifies ports by letters, while class PortMCP23S17 uses portNum
for port A, use portNum=0
for port B, use portNum=1
readPins parameter configures port's pins.
Example instantiation:
const uint8_t PortIOE::DEVICE_ADDR = 0x20; //MCP23S17 address, all 3 ADDR pins are grounded
PortIOE port_B(1);
Port_MCP23S17 portWrite_B(port_B, 0); //all pins are set to output for strobes and LEDs
PortIOE port_A(0);
Port_MCP23S17 portRead_A(port_A, 1<<0 | 1<<1 ); //pins 0,1 are set to input for reading,
const uint8_t Port_MCP23S17::DEVICE_ADDR = 0x20; //MCP23S17 address, all 3 ADDR pins grounded
Port_MCP23S17 portB(1, 0); //all pins are set to output for strobes and LEDs
Port_MCP23S17 portA(0, 1<<0 | 1<<1 ); //1 pins are set to input for reading,
//remaining pins can be used for LEDs
Diode orientation
@ -37,11 +36,14 @@ MCP23S17 data sheet
class PortMCP23S17 : public PortInterface
{
private:
PortIOE& port;
static const uint8_t DEVICE_ADDR;
const uint8_t portNum; //port identification number
uint8_t outputVal; //bit pattern for strobe and LEDs
const uint8_t readPins; //bits, IODIR 0=output, 1=input
uint8_t transfer(const uint8_t command, const uint8_t registerAddr, const uint8_t data);
public:
PortMCP23S17(PortIOE& port, const uint8_t readPins) : port(port), readPins(readPins) {}
PortMCP23S17(const uint8_t portNum, const uint8_t readPins)
: portNum(portNum), outputVal(0), readPins(readPins) {}
void beginProtocol();
void begin(const uint8_t strobeOn);
virtual void write(const uint8_t pin, const bool logicLevel);

17
tutorials/keybrd_5b_LED_on_IOE/keybrd_5b_LED_on_IOE.ino
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@ -27,7 +27,6 @@ This layout table shows left and right matrices:
#include <LED_uC.h>
//right matrix
#include <PortIOE.h>
#include <PortMCP23S17.h>
#include <Scanner_IOE.h>
#include <LED_IOE.h>
@ -47,19 +46,15 @@ LED_uC LED_CapsLck(21);
// =============== RIGHT ===============
// --------------- RIGHT SCANNER ---------------
const uint8_t PortIOE::DEVICE_ADDR = 0x20; //MCP23S17 address with all 3 ADDR pins are grounded
const uint8_t PortMCP23S17::DEVICE_ADDR = 0x20; //MCP23S17 address, all 3 ADDR pins are grounded
PortMCP23S17 portA(0, 1<<0 | 1<<1 ); //for read and LED
PortMCP23S17 portB(1, 0); //for strobe and LED
PortIOE port_A(0);
PortMCP23S17 portRead(port_A, 1<<0 | 1<<1 );//read and LED
PortIOE port_B(1);
PortMCP23S17 portWrite(port_B, 0); //write to strobe and LED
Scanner_IOE scanner_R(LOW, portWrite, portRead);
Scanner_IOE scanner_R(LOW, portB, portA);
// ---------------- RIGHT LEDs -----------------
LED_IOE LED_normal(portRead, 1<<5); //port A
LED_IOE LED_fn(portWrite, 1<<4); //port B
LED_IOE LED_normal(portA, 1<<5);
LED_IOE LED_fn(portB, 1<<4);
// =================== CODES ===================
// ---------------- LAYER CODE -----------------