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/* Copyright 2012 Jun Wako <wakojun@gmail.com>
*
* This is heavily based on hid_liber / board . { c | h } .
* https : //github.com/BathroomEpiphanies/AVR-Keyboard
*
* Copyright ( c ) 2012 Fredrik Atmer , Bathroom Epiphanies Inc
* http : //bathroomepiphanies.com
*
* As for liscensing consult with the original files or its author .
*/
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# include <stdint.h>
# include <stdbool.h>
# include <avr/io.h>
# include <util/delay.h>
# include "print.h"
# include "debug.h"
# include "util.h"
# include "matrix.h"
# ifndef DEBOUNCE
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# define DEBOUNCE 0
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# endif
static uint8_t debouncing = DEBOUNCE ;
// bit array of key state(1:on, 0:off)
static matrix_row_t * matrix ;
static matrix_row_t * matrix_debounced ;
static matrix_row_t _matrix0 [ MATRIX_ROWS ] ;
static matrix_row_t _matrix1 [ MATRIX_ROWS ] ;
# define _DDRA (uint8_t *const)&DDRA
# define _DDRB (uint8_t *const)&DDRB
# define _DDRC (uint8_t *const)&DDRC
# define _DDRD (uint8_t *const)&DDRD
# define _DDRE (uint8_t *const)&DDRE
# define _DDRF (uint8_t *const)&DDRF
# define _PINA (uint8_t *const)&PINA
# define _PINB (uint8_t *const)&PINB
# define _PINC (uint8_t *const)&PINC
# define _PIND (uint8_t *const)&PIND
# define _PINE (uint8_t *const)&PINE
# define _PINF (uint8_t *const)&PINF
# define _PORTA (uint8_t *const)&PORTA
# define _PORTB (uint8_t *const)&PORTB
# define _PORTC (uint8_t *const)&PORTC
# define _PORTD (uint8_t *const)&PORTD
# define _PORTE (uint8_t *const)&PORTE
# define _PORTF (uint8_t *const)&PORTF
# define _BIT0 0x01
# define _BIT1 0x02
# define _BIT2 0x04
# define _BIT3 0x08
# define _BIT4 0x10
# define _BIT5 0x20
# define _BIT6 0x40
# define _BIT7 0x80
/* Specifies the ports and pin numbers for the rows */
static
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uint8_t * const row_ddr [ MATRIX_ROWS ] = {
_DDRB , _DDRB ,
_DDRC , _DDRC ,
_DDRD , _DDRD , _DDRD , _DDRD , _DDRD , _DDRD , _DDRD , _DDRD ,
_DDRF , _DDRF , _DDRF , _DDRF , _DDRF , _DDRF } ;
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static
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uint8_t * const row_port [ MATRIX_ROWS ] = {
_PORTB , _PORTB ,
_PORTC , _PORTC ,
_PORTD , _PORTD , _PORTD , _PORTD , _PORTD , _PORTD , _PORTD , _PORTD ,
_PORTF , _PORTF , _PORTF , _PORTF , _PORTF , _PORTF } ;
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static
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uint8_t * const row_pin [ MATRIX_ROWS ] = {
_PINB , _PINB ,
_PINC , _PINC ,
_PIND , _PIND , _PIND , _PIND , _PIND , _PIND , _PIND , _PIND ,
_PINF , _PINF , _PINF , _PINF , _PINF , _PINF } ;
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static
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const uint8_t row_bit [ MATRIX_ROWS ] = {
_BIT4 , _BIT7 ,
_BIT6 , _BIT7 ,
_BIT0 , _BIT1 , _BIT2 , _BIT3 , _BIT4 , _BIT5 , _BIT6 , _BIT7 ,
_BIT0 , _BIT1 , _BIT4 , _BIT5 , _BIT6 , _BIT7 } ;
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static
const uint8_t mask = 0x0E ;
/* Specifies the ports and pin numbers for the columns */
static
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const uint8_t col_bit [ MATRIX_COLS ] = { 0x00 , 0x02 , 0x04 , 0x06 , 0x08 , 0x0A , 0x0C , 0x0E } ;
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static
inline void pull_column ( int col ) {
PORTB = col_bit [ col ] | ( PORTB & ~ mask ) ;
}
static
inline void release_column ( int col ) {
}
/* PORTB is set as input with pull-up resistors
PORTC , D , E , F are set to high output */
static
void setup_io_pins ( void ) {
uint8_t row ;
DDRB | = 0x0E ;
PORTB & = ~ 0x0E ;
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for ( row = 0 ; row < MATRIX_ROWS ; row + + ) {
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* row_ddr [ row ] & = ~ row_bit [ row ] ;
* row_port [ row ] & = ~ row_bit [ row ] ;
}
}
static
void setup_leds ( void ) {
DDRB | = 0x60 ;
PORTB | = 0x60 ;
}
inline
uint8_t matrix_rows ( void )
{
return MATRIX_ROWS ;
}
inline
uint8_t matrix_cols ( void )
{
return MATRIX_COLS ;
}
void matrix_init ( void )
{
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// To use PORTF disable JTAG with writing JTD bit twice within four cycles.
MCUCR | = ( 1 < < JTD ) ;
MCUCR | = ( 1 < < JTD ) ;
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// initialize row and col
setup_io_pins ( ) ;
setup_leds ( ) ;
// initialize matrix state: all keys off
for ( uint8_t i = 0 ; i < MATRIX_ROWS ; i + + ) _matrix0 [ i ] = 0x00 ;
for ( uint8_t i = 0 ; i < MATRIX_ROWS ; i + + ) _matrix1 [ i ] = 0x00 ;
matrix = _matrix0 ;
matrix_debounced = _matrix1 ;
}
uint8_t matrix_scan ( void )
{
if ( ! debouncing ) {
uint8_t * tmp = matrix_debounced ;
matrix_debounced = matrix ;
matrix = tmp ;
}
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for ( uint8_t col = 0 ; col < MATRIX_COLS ; col + + ) { // 0-7
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pull_column ( col ) ; // output hi on theline
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_delay_us ( 5 ) ; // without this wait it won't read stable value.
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for ( uint8_t row = 0 ; row < MATRIX_ROWS ; row + + ) { // 0-17
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bool prev_bit = matrix [ row ] & ( 1 < < col ) ;
bool curr_bit = * row_pin [ row ] & row_bit [ row ] ;
if ( prev_bit ! = curr_bit ) {
matrix [ row ] ^ = ( 1 < < col ) ;
if ( debouncing ) {
debug ( " bounce!: " ) ; debug_hex ( debouncing ) ; print ( " \n " ) ;
}
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_delay_ms ( 1 ) ; // improved affect on bouncing
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debouncing = DEBOUNCE ;
}
}
release_column ( col ) ;
}
if ( debouncing ) {
debouncing - - ;
}
return 1 ;
}
bool matrix_is_modified ( void )
{
// NOTE: no longer used
return true ;
}
inline
bool matrix_has_ghost ( void )
{
return false ;
}
inline
bool matrix_is_on ( uint8_t row , uint8_t col )
{
return ( matrix_debounced [ row ] & ( 1 < < col ) ) ;
}
inline
matrix_row_t matrix_get_row ( uint8_t row )
{
return matrix_debounced [ row ] ;
}
void matrix_print ( void )
{
print ( " \n r/c 01234567 \n " ) ;
for ( uint8_t row = 0 ; row < MATRIX_ROWS ; row + + ) {
phex ( row ) ; print ( " : " ) ;
pbin_reverse ( matrix_get_row ( row ) ) ;
print ( " \n " ) ;
}
}
uint8_t matrix_key_count ( void )
{
uint8_t count = 0 ;
for ( uint8_t i = 0 ; i < MATRIX_ROWS ; i + + ) {
for ( uint8_t j = 0 ; j < MATRIX_COLS ; j + + ) {
if ( matrix_is_on ( i , j ) )
count + + ;
}
}
return count ;
}