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/*
Copyright 2011 Jun Wako <wakojun@gmail.com>
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
/*
* scan matrix
*/
#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"
#include "led.h"
#if (MATRIX_COLS > 16)
# error "MATRIX_COLS must not exceed 16"
#endif
#if (MATRIX_ROWS > 255)
# error "MATRIX_ROWS must not exceed 255"
#endif
#ifndef DEBOUNCE
# define DEBOUNCE 0
#endif
static uint8_t debouncing = DEBOUNCE;
// matrix state buffer(1:on, 0:off)
#if (MATRIX_COLS <= 8)
static uint8_t *matrix;
static uint8_t *matrix_prev;
static uint8_t _matrix0[MATRIX_ROWS];
static uint8_t _matrix1[MATRIX_ROWS];
#else
static uint16_t *matrix;
static uint16_t *matrix_prev;
static uint16_t _matrix0[MATRIX_ROWS];
static uint16_t _matrix1[MATRIX_ROWS];
#endif
#ifdef MATRIX_HAS_GHOST
static bool matrix_has_ghost_in_row(uint8_t row);
#endif
static uint8_t read_col(uint8_t row);
static void unselect_rows(void);
static void select_row(uint8_t row);
inline
uint8_t matrix_rows(void)
{
return MATRIX_ROWS;
}
inline
uint8_t matrix_cols(void)
{
return MATRIX_COLS;
}
void matrix_init(void)
{
// initialize row and col
unselect_rows();
// Input with pull-up(DDR:0, PORT:1)
// Column C1 ~ C7 (PortC0-6)
// Column C0(Port E1)
DDRC &= ~0b01111111;
PORTC |= 0b01111111;
DDRE &= ~0b00000010;
PORTE |= 0b00000010;
//DDRB &= ~0b00000100;
//PORTB |= 0b00000100;
// modifier B3/4,F4/5,E4 always input
// A0
//DDRA |= 0b00000001;
//PORTA &= 0b00000001;
//DDRB |= 0b00011000;
//PORTB &= 0b00011000;
//DDRF |= ~0b00110000;
//PORTF &= 0b00110000;
//DDRB &= ~0b00011000;
//PORTB |= 0b00011000;
//DDRF &= ~0b00110000;
//PORTF |= 0b00110000;
//DDRE &= ~0b00010000;
//PORTE |= 0b00010000;
// 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_prev = _matrix1;
}
uint8_t matrix_scan(void)
{
if (!debouncing) {
uint8_t *tmp = matrix_prev;
matrix_prev = matrix;
matrix = tmp;
}
for (uint8_t i = 0; i < MATRIX_ROWS; i++) {
unselect_rows();
select_row(i);
_delay_us(30); // without this wait read unstable value.
if ( i == ( MATRIX_ROWS - 1 ) ) { // CHECK CAPS LOCK
if (host_keyboard_leds() & (1<<USB_LED_CAPS_LOCK)) { // CAPS LOCK is ON on HOST
if ( ~read_col(i) & (1<< 4) ) { // CAPS LOCK is still DOWN ( 0bXXX1_XXXX)
matrix[i] = ~read_col(i) & 0b11101111; // change CAPS LOCK as released
} else { // CAPS LOCK in UP
matrix[i] = ~read_col(i) | 0b00010000; // send fake caps lock down
}
} else { // CAPS LOCK is OFF on HOST
if (matrix[i] != (uint8_t)~read_col(i)) {
matrix[i] = (uint8_t)~read_col(i);
if (debouncing) {
debug("bounce!: "); debug_hex(debouncing); print("\n");
}
debouncing = DEBOUNCE;
}
}
} else {
if (matrix[i] != (uint8_t)~read_col(i)) {
matrix[i] = (uint8_t)~read_col(i);
if (debouncing) {
debug("bounce!: "); debug_hex(debouncing); print("\n");
}
debouncing = DEBOUNCE;
}
}
}
unselect_rows();
if (debouncing) {
debouncing--;
}
return 1;
}
bool matrix_is_modified(void)
{
if (debouncing) return false;
for (uint8_t i = 0; i < MATRIX_ROWS; i++) {
if (matrix[i] != matrix_prev[i]) {
return true;
}
}
return false;
}
inline
bool matrix_has_ghost(void)
{
#ifdef MATRIX_HAS_GHOST
for (uint8_t i = 0; i < MATRIX_ROWS; i++) {
if (matrix_has_ghost_in_row(i))
return true;
}
#endif
return false;
}
inline
bool matrix_is_on(uint8_t row, uint8_t col)
{
// if ( row == ( MATRIX_ROWS - 1 ) && col == 4) { // CHECK CAPS LOCK
// if (host_keyboard_leds() & (1<<USB_LED_CAPS_LOCK)) { // CAPS LOCK is ON on HOST
// if ((matrix_prev[row] & 0b00010000) && (~matrix[row] & 0b00010000)) {
// debug("CapsLock Reverse:");debug_hex(matrix[row]);
// matrix[row] |= 0b00010000;
// matrix_prev[row] &= ~0b00010000;
// debug("->");debug_hex(matrix[row]);debug("\n");
// }
// }
// }
return (matrix[row] & (1<<col));
}
inline
#if (MATRIX_COLS <= 8)
uint8_t matrix_get_row(uint8_t row)
#else
uint16_t matrix_get_row(uint8_t row)
#endif
{
return matrix[row];
}
void matrix_print(void)
{
print("\nr/c 01234567\n");
for (uint8_t row = 0; row < matrix_rows(); row++) {
phex(row); print(": ");
#if (MATRIX_COLS <= 8)
pbin_reverse(matrix_get_row(row));
#else
pbin_reverse16(matrix_get_row(row));
#endif
#ifdef MATRIX_HAS_GHOST
if (matrix_has_ghost_in_row(row)) {
print(" <ghost");
}
#endif
print("\n");
}
}
uint8_t matrix_key_count(void)
{
uint8_t count = 0;
for (uint8_t i = 0; i < MATRIX_ROWS; i++) {
#if (MATRIX_COLS <= 8)
count += bitpop(matrix[i]);
#else
count += bitpop16(matrix[i]);
#endif
}
return count;
}
#ifdef MATRIX_HAS_GHOST
inline
static bool matrix_has_ghost_in_row(uint8_t row)
{
// no ghost exists in case less than 2 keys on
if (((matrix[row] - 1) & matrix[row]) == 0)
return false;
// ghost exists in case same state as other row
for (uint8_t i=0; i < MATRIX_ROWS; i++) {
if (i != row && (matrix[i] & matrix[row]) == matrix[row])
return true;
}
return false;
}
#endif
inline
static uint8_t read_col(uint8_t row)
{
// For normal : Column C1 ~ C7 (PortC0-6), C0(Port E1)
// For modifier : B3(CNTRL)/4(SHIFT),F4(CMD/GUI)/5(OPTION,ALT)
// Modifier would be copied to report->mods except E4(CAPSLOCK)
uint8_t tmp;
if ( row == 10 ) {
tmp = 0xC0;
tmp |= (PINB >> 3 ) & 0b00000011; // LEFT CTRL is 0bit in modifier (HID Spec)
// LEFT SHIFT is 1bit in modifier (HID Spec)
tmp |= (PINF >> 3 ) & 0b00000100; // LEFT ALT is 2bit in modifier (HID Spec)
tmp |= (PINF >> 1 ) & 0b00001000; // LEFT GUI is 3bit in modifier (HID Spec)
tmp |= (PINA << 4 ) & 0b00010000; // CAPSLOCK
tmp |= (PINB << 3 ) & 0b00100000; // POWER
} else {
tmp = 0x00;
tmp = (PINE >> 1)&0b00000001;
tmp |= PINC << 1 ;
}
return tmp;
}
inline
static void unselect_rows(void)
{
// Hi-Z(DDR:0, PORT:0) to unselect
// DDR : 1, output 0, input
DDRB &= ~0b00000011; // PB: 1,0
PORTB &= ~0b00000011;
DDRD &= ~0b00010000; // PD: 4
PORTD &= ~0b00010000;
DDRE &= ~0b11000000; // PE: 7,6
PORTE &= ~0b11000000;
DDRF &= ~0b11000111; // PF: 7,6,2,1,0
PORTF &= ~0b11000111;
// to unselect virtual row(modifier), set port to output with low
DDRA |= 0b00000001; // PA: 0 for CAPSLOCK
PORTA &= ~0b00000001;
DDRB |= 0b00011100; // PB: 3,4 for modifier(row10)
PORTB &= ~0b00011100; // PB: 2 for power
DDRF |= 0b00110000; // PF: 4,5 for modifier
PORTF &= ~0b00110000;
}
inline
static void select_row(uint8_t row)
{
// Output low(DDR:1, PORT:0) to select
// with row enable, column could send low to AVR when pressed
// row: 0 1 2 3 4 5 6 7 8 9
// pin: PB1, PB0, PE7, PE6, PD4, PF2, PF0, PF1, PF6 PF7
switch (row) {
case 0:
DDRB |= (1<<1);
PORTB &= ~(1<<1);
break;
case 1:
DDRB |= (1<<0);
PORTB &= ~(1<<0);
break;
case 2:
DDRE |= (1<<7);
PORTE &= ~(1<<7);
break;
case 3:
DDRE |= (1<<6);
PORTE &= ~(1<<6);
break;
case 4:
DDRD |= (1<<4);
PORTD &= ~(1<<4);
break;
case 5:
DDRF |= (1<<2);
PORTF &= ~(1<<2);
break;
case 6:
DDRF |= (1<<0);
PORTF &= ~(1<<0);
break;
case 7:
DDRF |= (1<<1);
PORTF &= ~(1<<1);
break;
case 8:
DDRF |= (1<<6);
PORTF &= ~(1<<6);
break;
case 9:
DDRF |= (1<<7);
PORTF &= ~(1<<7);
break;
case 10:
// modifier has no row enable
// to select virtual row, set port as input
DDRA &= ~0b00000001;
PORTA |= 0b00000001;
DDRB &= ~0b00011100;
PORTB |= 0b00011100;
DDRF &= ~0b00110000;
PORTF |= 0b00110000;
break;
}
}
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