di0ib/keybrd
Archived
1
0
Fork 0
Code Releases Activity

move scanner instantiation from Row_uC to sketch, update keybrd_1_breadboard.ino

Browse Source
This commit is contained in:
wolfv6 2016-09-05 14:09:59 -06:00
parent ae6b21b712
commit 874ba7ac11
16 changed files with 108 additions and 220 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
src/DebouncerInterface.h
View File

@ -3,7 +3,7 @@
#include <config_keybrd.h>
/* DebouncerInterface is an interface class.
/*
debounce() takes rawSignal and returns debounced signal. Signals are bitwise.
*/
class DebouncerInterface

24
src/Row.cpp
View File

@ -1,4 +1,28 @@
#include "Row.h"
/* constructor
*/
Row::Row(ScannerInterface& refScanner, const uint8_t strobePin,
Key* const ptrsKeys[], const uint8_t readPinCount)
: refScanner(refScanner), strobePin(strobePin),
ptrsKeys(ptrsKeys), readPinCount(readPinCount), debounced(0)
{
refScanner.begin(strobePin);
}
/* process() scans the row and calls any newly pressed or released keys.
Bitwise variables are 1 bit per key.
*/
void Row::process()
{
read_pins_t readState; //bitwise, 1 means key is pressed, 0 means released
read_pins_t debouncedChanged; //bitwise, 1 means debounced changed
readState = refScanner.scan(strobePin);
debouncedChanged = debouncer.debounce(readState, debounced);
send(readPinCount, debouncedChanged);
}
/*
send() calls key's press() or release() function if key was pressed or released.
Both parameters are bitwise.

18
src/Row.h
View File

@ -5,19 +5,29 @@
#include <inttypes.h>
#include <config_keybrd.h>
#include <Key.h>
#include <ScannerInterface.h>
#include <Debouncer_Samples.h>
/* Row is an abstract base class.
/*
strobePin has one of two formats:
* if refScanner a Scanner_uC, then strobePin is an Arduino pin number connected to this row
* if refScanner a Scanner_IOE, then strobePin is bitwise, 1 indicating IC pin connected to this row
*/
class Row
{
private:
ScannerInterface& refScanner;
const uint8_t strobePin; //pin connected to this row (details above)
Key *const *const ptrsKeys; //array of Key pointers
const uint8_t readPinCount; //number of read pins
Debouncer_Samples debouncer;
virtual void keyWasPressed();
protected:
protected://todo is protected needed?
read_pins_t debounced; //bitwise state of keys after debouncing, 1=pressed, 0=released
void send(const uint8_t readPinCount, const read_pins_t debouncedChanged);
public:
Row(Key* const ptrsKeys[]) : ptrsKeys(ptrsKeys), debounced(0) { }
virtual void process()=0;
Row(ScannerInterface& refScanner, const uint8_t strobePin,
Key* const ptrsKeys[], const uint8_t readPinCount);
void process();
};
#endif

12
src/Row_IOE.cpp
View File

@ -1,12 +0,0 @@
#include "Row_IOE.h"
void Row_IOE::process()
{
//these variables are all bitwise, one bit per key
uint8_t readState; //1 means pressed, 0 means released
uint8_t debouncedChanged; //1 means debounced changed
readState = scanner.scan();
debouncedChanged = debouncer.debounce(readState, debounced);
send(readPinCount, debouncedChanged);
}

26
src/Row_IOE.h
View File

@ -1,26 +0,0 @@
#ifndef ROW_IOE_H
#define ROW_IOE_H
#include <Row.h>
#include <Scanner_Port.h>
#include <Debouncer_Samples.h>
class PortWriteInterface;
class PortReadInterface;
/* Row_IOE is a row connected to an I/O Expander.
Configuration and Instantiation instructions are in keybrd/src/Row_uC.h
*/
class Row_IOE : public Row
{
private:
Scanner_Port scanner;
Debouncer_Samples debouncer;
const uint8_t readPinCount;
public:
Row_IOE(PortWriteInterface& refPortWrite, const uint8_t strobePin,
PortReadInterface& refPortRead, const uint8_t readPinCount, Key *const ptrsKeys[])
: Row(ptrsKeys), scanner(refPortWrite, strobePin, refPortRead),
readPinCount(readPinCount) { }
void process();
};
#endif

21
src/Row_ShiftRegisters.cpp
View File

@ -1,21 +0,0 @@
#include "Row_ShiftRegisters.h"
/* Call begin() once in sketch setup()
*/
void Row_ShiftRegisters::begin()
{
scanner.begin();
}
/* process() scans the row and calls any newly pressed or released keys.
Bitwise variables are 1 bit per key.
*/
void Row_ShiftRegisters::process()
{
read_pins_t readState; //bitwise, 1 means key is pressed, 0 means released
read_pins_t debouncedChanged; //bitwise, 1 means debounced changed
readState = scanner.scan();
debouncedChanged = debouncer.debounce(readState, debounced);
send(readPinCount, debouncedChanged);
}

48
src/Row_ShiftRegisters.h
View File

@ -1,48 +0,0 @@
#ifndef ROW_SHIFTREGISTERS_H
#define ROW_SHIFTREGISTERS_H
#include <Row.h>
#include <Scanner_ShiftRegs74HC165.h>
#include <Debouncer_Samples.h>
/* Row_ShiftRegisters is a row connected to shift registers.
Instantiation
-------------
Scanner_ShiftRegs74HC165.h has instructions for hardware and setting active state.
Example instantiation of a Row_ShiftRegisters:
const uint8_t Scanner_ShiftRegs74HC165::SHIFT_LOAD = 10;
const bool Scanner_ShiftRegs74HC165::STROBE_ON = LOW; //active low
const bool Scanner_ShiftRegs74HC165::STROBE_OFF = HIGH;
Key* const ptrsKeys_0[] = { &k_00, &k_01, &k_02, &k_03, &k_04, &k_05 };
uint8_t readPinCount_0 = sizeof(ptrsKeys_0)/sizeof(*ptrsKeys_0);
Row_ShiftRegisters row_0(1, readPinCount_0, ptrsKeys_0);
call begin() from sketch setup():
void setup()
{
Keyboard.begin();
SPI.begin();
row_0.begin();
}
readPinCount should equal number of keys in ptrsKeys_0[] array.
if readPinCount is too small, a key will be unresponsive
if readPinCount is too large, the keyboard will fail in an unpredictable way
*/
class Row_ShiftRegisters : public Row
{
private:
Scanner_ShiftRegs74HC165 scanner;
Debouncer_Samples debouncer;
const uint8_t readPinCount; //number of read pins
public:
Row_ShiftRegisters(const uint8_t strobePin, const uint8_t readPinCount,
Key* const ptrsKeys[])
: Row(ptrsKeys), scanner(strobePin, readPinCount), readPinCount(readPinCount) { }
void begin();
void process();
};
#endif

14
src/Row_uC.cpp
View File

@ -1,14 +0,0 @@
#include "Row_uC.h"
/* process() scans the row and calls any newly pressed or released keys.
Bitwise variables are 1 bit per key.
*/
void Row_uC::process()
{
read_pins_t readState; //bitwise, 1 means key is pressed, 0 means released
read_pins_t debouncedChanged; //bitwise, 1 means debounced changed
readState = scanner.scan();
debouncedChanged = debouncer.debounce(readState, debounced);
send(readPinCount, debouncedChanged);
}

41
src/Row_uC.h
View File

@ -1,41 +0,0 @@
#ifndef ROW_UC_H
#define ROW_UC_H
#include <Row.h>
#include <Scanner_uC.h>
#include <Debouncer_Samples.h>
/* Row_uC is a row connected to a microcontroller.
Instantiation
-------------
keybrd_library_developer_guide.md has instructions for ## Active state and diode orientation
Example instantiation of a Row_uC:
const bool Scanner_uC::STROBE_ON = LOW; //logic level of strobe on, active low
const bool Scanner_uC::STROBE_OFF = HIGH; //logic level of strobe off
const uint8_t readPins[] = {0,1,2,3,7,8};
const uint8_t readPinCount = sizeof(readPins)/sizeof(*readPins);
Key* const ptrsKeys_0[] = { &k_00, &k_01, &k_02, &k_03, &k_04, &k_05 };
Row_uC row_0(21, readPins, readPinCount, ptrsKeys_0);
Number of readPins should equal number of keys in ptrsKeys_0[] array.
if a readPins is missing, a key will be unresposive
if a Key pointer is missing, the keyboard will fail in an unpredictable way
*/
class Row_uC : public Row
{
private:
Scanner_uC scanner;
Debouncer_Samples debouncer;
const uint8_t readPinCount;
public:
Row_uC(const uint8_t strobePin, const uint8_t readPins[], const uint8_t readPinCount,
Key* const ptrsKeys[])
: Row(ptrsKeys), scanner(strobePin, readPins, readPinCount),
readPinCount(readPinCount) { }
void process();
};
#endif

14
src/ScannerInterface.h Normal file
View File

@ -0,0 +1,14 @@
#ifndef SCANNERINTERFACE_H
#define SCANNERINTERFACE_H
#include <config_keybrd.h>
/* scan() retuns state of readPins.
*/
class ScannerInterface
{
public:
virtual void begin(const uint8_t strobePin)=0;
virtual read_pins_t scan(const uint8_t strobePin)=0;
};
#endif

2
src/Scanner_Port.cpp
View File

@ -3,7 +3,7 @@
/* scan() strobes the row's strobePin and retuns state of port's input pins.
Bitwise variables are 1 bit per key.
*/
uint8_t Scanner_Port::scan()
uint8_t Scanner_Port::scan(const uint8_t strobePin)
{
uint8_t readState; //bitwise, 1 means key is pressed, 0 means released

9
src/Scanner_Port.h
View File

@ -18,13 +18,10 @@ class Scanner_Port
static const bool STROBE_ON; //HIGH or LOW logic level of strobe on, active state
static const bool STROBE_OFF; //logic level of strobe off, complement of STROBE_ON
PortWriteInterface& refPortWrite; //the IC port containing the strobePin
const uint8_t strobePin; //bitwise, 1 indicates IC pin connected to this row
PortReadInterface& refPortRead; //the IC's read port
public:
Scanner_Port(PortWriteInterface &refPortWrite, const uint8_t strobePin,
PortReadInterface& refPortRead)
: refPortWrite(refPortWrite), strobePin(strobePin),
refPortRead(refPortRead) {}
uint8_t scan();
Scanner_Port(PortWriteInterface &refPortWrite, PortReadInterface& refPortRead)
: refPortWrite(refPortWrite), refPortRead(refPortRead) {}
uint8_t scan(const uint8_t strobePin);
};
#endif

42
src/Scanner_uC.cpp
View File

@ -10,47 +10,51 @@ https://www.arduino.cc/en/Reference/Constants > Digital Pins modes: INPUT, INPUT
/* constructor
*/
Scanner_uC::Scanner_uC(const uint8_t strobePin,
const uint8_t readPins[], const uint8_t readPinCount)
: strobePin(strobePin), readPins(readPins), readPinCount(readPinCount)
Scanner_uC::Scanner_uC(const bool strobeOn, const uint8_t readPins[], const uint8_t readPinCount)
: strobeOn(strobeOn), strobeOff(!strobeOn), readPins(readPins), readPinCount(readPinCount)
{
uint8_t mode;
//configure row
pinMode(strobePin, OUTPUT);
if (STROBE_ON == LOW) //if active low
{
mode = INPUT_PULLUP; //use internal pull-up resistor
}
else //if active high
{
mode = INPUT; //requires external pull-down resistor
}
//configure read pins
if (strobeOn == LOW) //if active low
{
mode = INPUT_PULLUP; //use internal pull-up resistor
}
else //if active high
{
mode = INPUT; //requires external pull-down resistor
}
for (uint8_t i=0; i < readPinCount; i++)
{
pinMode(readPins[i], mode);
}
}
/*
Configure row-strobe pin to output.
*/
void Scanner_uC::begin(const uint8_t strobePin)
{
pinMode(strobePin, OUTPUT);
}
/* scan() strobes the row's strobePin and retuns state of readPins.
Bitwise variables are 1 bit per key.
*/
read_pins_t Scanner_uC::scan()
read_pins_t Scanner_uC::scan(const uint8_t strobePin)
{
read_pins_t readState = 0; //bitwise, 1 means key is pressed, 0 means released
read_pins_t readMask = 1; //bitwise, active bit is 1
//strobe row on
digitalWrite(strobePin, STROBE_ON);
digitalWrite(strobePin, strobeOn);
delayMicroseconds(3); //time to stablize voltage
//read all the read pins
for (uint8_t i=0; i < readPinCount; i++)
{
if ( digitalRead(readPins[i]) == STROBE_ON )
if ( digitalRead(readPins[i]) == strobeOn )
{
readState |= readMask;
}
@ -58,7 +62,7 @@ read_pins_t Scanner_uC::scan()
}
//strobe row off
digitalWrite(strobePin, STROBE_OFF);
digitalWrite(strobePin, strobeOff);
return readState;
}

23
src/Scanner_uC.h
View File

@ -4,24 +4,23 @@
#include <Arduino.h>
#include <inttypes.h>
#include <config_keybrd.h>
#include <PortWriteInterface.h>
#include <PortReadInterface.h>
#include <ScannerInterface.h>
//#include <PortWriteInterface.h>todo not needed?
//#include <PortReadInterface.h>
/* Scanner_uC class uses Arduino pin numbers (not port pin numbers).
Constructor is in Scanner_uC.cpp
Limit number of readPins to size of read_pins_t, which is defined in config_keybrd.h
*/
class Scanner_uC
class Scanner_uC : public ScannerInterface
{
private:
static const bool STROBE_ON; //logic level of strobe on, HIGH or LOW
static const bool STROBE_OFF; //logic level of strobe off, complement of STROBE_ON
const uint8_t strobePin; //Arduino pin number connected to this row
const bool strobeOn; //logic level of strobe on, HIGH or LOW
const bool strobeOff; //logic level of strobe off, complement of strobeOn
const uint8_t* const readPins; //array of read pin numbers
const uint8_t readPinCount; //number of read pins
const uint8_t readPinCount; //number of readPins
public:
Scanner_uC(const uint8_t strobePin,
const uint8_t readPins[], const uint8_t readPinCount);
virtual read_pins_t scan();
Scanner_uC(const bool strobeOn, const uint8_t readPins[], const uint8_t readPinCount);
void begin(const uint8_t strobePin);
virtual read_pins_t scan(const uint8_t strobePin);
};
#endif

30
tutorials/keybrd_1_breadboard/keybrd_1_breadboard.ino
View File

@ -2,38 +2,40 @@
| Layout | **0** | **1** |
|:------:|-------|-------|
| **0** | 1 | a |
| **1** | b | c |
| **0** | 1 | a |
| **1** | 2 | b |
*/
// ################## GLOBAL ###################
// ================= INCLUDES ==================
#include <Scanner_uC.h>
#include <ScanDelay.h>
#include <Code_Sc.h>
#include <Row_uC.h>
#include <Row.h>
// ============ SPEED CONFIGURATION ============
ScanDelay scanDelay(9000);
// ================ ACTIVE STATE ===============
const bool Scanner_uC::STROBE_ON = LOW;
const bool Scanner_uC::STROBE_OFF = HIGH;
// =================== PINS ====================
// ================== SCANNER ==================
uint8_t readPins[] = {14, 15};
uint8_t READ_PIN_COUNT = sizeof(readPins)/sizeof(*readPins);
uint8_t readPinCount = sizeof(readPins)/sizeof(*readPins);
Scanner_uC scanner(LOW, readPins, readPinCount);
// =================== CODES ===================
Code_Sc s_1(KEY_1);
Code_Sc s_a(KEY_A);
Code_Sc s_b(KEY_B);
Code_Sc s_c(KEY_C);
Code_Sc s_1(KEY_1);
Code_Sc s_2(KEY_2);
// =================== ROWS ====================
Key* ptrsKeys_0[] = { &s_1, &s_a };
Row_uC row_0(0, readPins, READ_PIN_COUNT, ptrsKeys_0);
uint8_t keyCount_0 = sizeof(ptrsKeys_0)/sizeof(*ptrsKeys_0);
Row row_0(scanner, 0, ptrsKeys_0, keyCount_0);
Key* ptrsKeys_1[] = { &s_b, &s_c };
Row_uC row_1(1, readPins, READ_PIN_COUNT, ptrsKeys_1);
Key* ptrsKeys_1[] = { &s_2, &s_b };
uint8_t keyCount_1 = sizeof(ptrsKeys_1)/sizeof(*ptrsKeys_1);
Row row_1(scanner, 1, ptrsKeys_1, keyCount_1);
// ################### MAIN ####################
void setup()

2
tutorials/tutorial_1_breadboard_keyboard.md
View File

@ -99,7 +99,7 @@ Breadboard keyboard assembly instructions:
* Teensy LC is on the left
* switch leads are oriented to connect diodes to columns (pictured below)
* diode cut offs connect terminal strips into columns
* diodes connect switches to blue buses; orient diodes with cathode (banded end) towards the row (bus strip)
* diodes connect switches to rows; orient diodes with cathode (banded end) towards the row (blue bus strip)
![switch orientation](keybrd_1_breadboard/switch_orientation.JPG "switch orientation")