aw9523_keypad_5x7.ino File Reference

#include <IoExpanderDrv.hpp>

Include dependency graph for aw9523_keypad_5x7.ino:

Go to the source code of this file.

Macros
#define	SENSOR_SDA   17
#define	SENSOR_SCL   18
#define	SENSOR_IRQ   10

Functions
void	onKeyboardInterrupt ()
void	scanKeyboard (bool state[ROW_COUNT][COLUMN_COUNT])
const char *	specialKeyName (uint8_t row, uint8_t column)
void	printKeyName (uint8_t row, uint8_t column, bool symbolLayer)
void	reportChanges (const bool current[ROW_COUNT][COLUMN_COUNT])
void	setup ()
void	loop ()

Variables
IoExpanderAW9523	expander
volatile bool	keyboardInterrupt = false
bool	keyState [ROW_COUNT][COLUMN_COUNT] = {}

Detailed Description

Author

Lewis He (lewis.nosp@m.he@o.nosp@m.utloo.nosp@m.k.co.nosp@m.m) @license MIT

Date

2026-09-23

AW9523 5x7 interrupt-driven keyboard matrix example.

Rows: P0_0-P0_4 (open-drain outputs) Columns: P0_5-P0_7 and P1_0-P1_3 (inputs with external pull-ups) INTN: Active-low open-drain output; connect it to SENSOR_IRQ.

Definition in file aw9523_keypad_5x7.ino.

Macro Definition Documentation

SENSOR_IRQ

#define SENSOR_IRQ   10

Definition at line 24 of file aw9523_keypad_5x7.ino.

SENSOR_SCL

#define SENSOR_SCL   18

Definition at line 20 of file aw9523_keypad_5x7.ino.

SENSOR_SDA

#define SENSOR_SDA   17

Definition at line 16 of file aw9523_keypad_5x7.ino.

Function Documentation

loop()

void loop

(

)

Definition at line 164 of file aw9523_keypad_5x7.ino.

References keyboardInterrupt, onKeyboardInterrupt(), reportChanges(), scanKeyboard(), and SENSOR_IRQ.

onKeyboardInterrupt()

void onKeyboardInterrupt

(

)

Definition at line 62 of file aw9523_keypad_5x7.ino.

References keyboardInterrupt.

Referenced by loop(), and setup().

printKeyName()

void printKeyName	(	uint8_t	row,
		uint8_t	column,
		bool	symbolLayer
	)

Definition at line 101 of file aw9523_keypad_5x7.ino.

References specialKeyName().

Referenced by reportChanges().

reportChanges()

void reportChanges

(

const bool

current[ROW_COUNT][COLUMN_COUNT]

)

Definition at line 121 of file aw9523_keypad_5x7.ino.

References keyState, and printKeyName().

Referenced by loop().

scanKeyboard()

void scanKeyboard

(

bool

state[ROW_COUNT][COLUMN_COUNT]

)

Definition at line 67 of file aw9523_keypad_5x7.ino.

References IoExpanderAW9523::digitalReadPort(), IoExpanderBase::digitalWrite(), IoExpanderAW9523::digitalWritePort(), and expander.

Referenced by loop(), and setup().

setup()

void setup

(

)

Definition at line 137 of file aw9523_keypad_5x7.ino.

References I2CDeviceNoHal::begin(), IoExpanderBase::configPins(), IoExpanderAW9523::digitalWritePort(), IoExpanderAW9523::enableInterrupts(), expander, keyboardInterrupt, keyState, onKeyboardInterrupt(), IoExpanderAW9523::PORT_ALL, scanKeyboard(), SENSOR_IRQ, SENSOR_SCL, SENSOR_SDA, and IoExpanderAW9523::setPort0PushPull().

specialKeyName()

const char * specialKeyName	(	uint8_t	row,
		uint8_t	column
	)

Definition at line 90 of file aw9523_keypad_5x7.ino.

Referenced by printKeyName().

Variable Documentation

expander

IoExpanderAW9523 expander

Definition at line 58 of file aw9523_keypad_5x7.ino.

Referenced by scanKeyboard(), and setup().

keyboardInterrupt

volatile bool keyboardInterrupt = false

Definition at line 59 of file aw9523_keypad_5x7.ino.

Referenced by loop(), onKeyboardInterrupt(), and setup().

keyState

bool keyState[ROW_COUNT][COLUMN_COUNT] = {}

Definition at line 60 of file aw9523_keypad_5x7.ino.

Referenced by reportChanges(), and setup().