242 lines
6.1 KiB
C
242 lines
6.1 KiB
C
/* Copyright 2012 Jun Wako <wakojun@gmail.com>
|
|
*
|
|
* This is heavily based on phantom/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.
|
|
*/
|
|
#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
|
|
# define DEBOUNCE 0
|
|
#endif
|
|
static uint8_t debouncing = DEBOUNCE;
|
|
|
|
// bit array of key state(1:on, 0:off)
|
|
static matrix_row_t matrix[MATRIX_ROWS];
|
|
static matrix_row_t matrix_debouncing[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
|
|
uint8_t *const row_ddr[MATRIX_ROWS] = {_DDRB, _DDRB, _DDRB, _DDRB, _DDRB, _DDRB};
|
|
|
|
static
|
|
uint8_t *const row_port[MATRIX_ROWS] = {_PORTB, _PORTB, _PORTB, _PORTB, _PORTB, _PORTB};
|
|
|
|
static
|
|
uint8_t *const row_pin[MATRIX_ROWS] = {_PINB, _PINB, _PINB, _PINB, _PINB, _PINB};
|
|
|
|
static
|
|
const uint8_t row_bit[MATRIX_ROWS] = { _BIT0, _BIT1, _BIT2, _BIT3, _BIT4, _BIT5};
|
|
|
|
/* Specifies the ports and pin numbers for the columns */
|
|
static
|
|
uint8_t *const col_ddr[MATRIX_COLS] = { _DDRD, _DDRC, _DDRC, _DDRD, _DDRD, _DDRE,
|
|
_DDRF, _DDRF, _DDRF, _DDRF, _DDRF, _DDRF,
|
|
_DDRD, _DDRD, _DDRD, _DDRD, _DDRD};
|
|
|
|
static
|
|
uint8_t *const col_port[MATRIX_COLS] = {_PORTD, _PORTC, _PORTC, _PORTD, _PORTD, _PORTE,
|
|
_PORTF, _PORTF, _PORTF, _PORTF, _PORTF, _PORTF,
|
|
_PORTD, _PORTD, _PORTD, _PORTD, _PORTD};
|
|
|
|
static
|
|
const uint8_t col_bit[MATRIX_COLS] = { _BIT5, _BIT7, _BIT6, _BIT4, _BIT0, _BIT6,
|
|
_BIT0, _BIT1, _BIT4, _BIT5, _BIT6, _BIT7,
|
|
_BIT7, _BIT6, _BIT1, _BIT2, _BIT3};
|
|
|
|
static
|
|
inline void pull_column(int col) {
|
|
*col_port[col] &= ~col_bit[col];
|
|
}
|
|
|
|
static
|
|
inline void release_column(int col) {
|
|
*col_port[col] |= col_bit[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, col;
|
|
for(row = 0; row < MATRIX_ROWS; row++) {
|
|
*row_ddr[row] &= ~row_bit[row];
|
|
*row_port[row] |= row_bit[row];
|
|
}
|
|
for(col = 0; col < MATRIX_COLS; col++) {
|
|
*col_ddr[col] |= col_bit[col];
|
|
*col_port[col] |= col_bit[col];
|
|
}
|
|
}
|
|
|
|
/* LEDs are on output compare pins OC1B OC1C
|
|
This activates fast PWM mode on them.
|
|
Prescaler 256 and 8-bit counter results in
|
|
16000000/256/256 = 244 Hz blink frequency.
|
|
LED_A: Caps Lock
|
|
LED_B: Scroll Lock */
|
|
/* Output on PWM pins are turned off when the timer
|
|
reaches the value in the output compare register,
|
|
and are turned on when it reaches TOP (=256). */
|
|
static
|
|
void setup_leds(void) {
|
|
TCCR1A |= // Timer control register 1A
|
|
(1<<WGM10) | // Fast PWM 8-bit
|
|
(1<<COM1B1)| // Clear OC1B on match, set at TOP
|
|
(1<<COM1C1); // Clear OC1C on match, set at TOP
|
|
TCCR1B |= // Timer control register 1B
|
|
(1<<WGM12) | // Fast PWM 8-bit
|
|
(1<<CS12); // Prescaler 256
|
|
OCR1B = 250; // Output compare register 1B
|
|
OCR1C = 250; // Output compare register 1C
|
|
// LEDs: LED_A -> PORTB6, LED_B -> PORTB7
|
|
DDRB &= 0x3F;
|
|
PORTB &= 0x3F;
|
|
}
|
|
|
|
|
|
inline
|
|
uint8_t matrix_rows(void)
|
|
{
|
|
return MATRIX_ROWS;
|
|
}
|
|
|
|
inline
|
|
uint8_t matrix_cols(void)
|
|
{
|
|
return MATRIX_COLS;
|
|
}
|
|
|
|
void matrix_init(void)
|
|
{
|
|
// To use PORTF disable JTAG with writing JTD bit twice within four cycles.
|
|
MCUCR |= (1<<JTD);
|
|
MCUCR |= (1<<JTD);
|
|
|
|
// initialize row and col
|
|
setup_io_pins();
|
|
setup_leds();
|
|
|
|
// initialize matrix state: all keys off
|
|
for (uint8_t i=0; i < MATRIX_ROWS; i++) {
|
|
matrix[i] = 0;
|
|
matrix_debouncing[i] = 0;
|
|
}
|
|
}
|
|
|
|
uint8_t matrix_scan(void)
|
|
{
|
|
for (uint8_t col = 0; col < MATRIX_COLS; col++) { // 0-16
|
|
pull_column(col); // output hi on theline
|
|
_delay_us(3); // without this wait it won't read stable value.
|
|
for (uint8_t row = 0; row < MATRIX_ROWS; row++) { // 0-5
|
|
bool prev_bit = matrix_debouncing[row] & ((matrix_row_t)1<<col);
|
|
bool curr_bit = !(*row_pin[row] & row_bit[row]);
|
|
if (prev_bit != curr_bit) {
|
|
matrix_debouncing[row] ^= ((matrix_row_t)1<<col);
|
|
if (debouncing) {
|
|
debug("bounce!: "); debug_hex(debouncing); print("\n");
|
|
}
|
|
debouncing = DEBOUNCE;
|
|
}
|
|
}
|
|
release_column(col);
|
|
}
|
|
|
|
if (debouncing) {
|
|
if (--debouncing) {
|
|
_delay_ms(1);
|
|
} else {
|
|
for (uint8_t i = 0; i < MATRIX_ROWS; i++) {
|
|
matrix[i] = matrix_debouncing[i];
|
|
}
|
|
}
|
|
}
|
|
|
|
return 1;
|
|
}
|
|
|
|
bool matrix_is_modified(void)
|
|
{
|
|
// NOTE: no longer used
|
|
return true;
|
|
}
|
|
|
|
inline
|
|
bool matrix_is_on(uint8_t row, uint8_t col)
|
|
{
|
|
return (matrix[row] & ((matrix_row_t)1<<col));
|
|
}
|
|
|
|
inline
|
|
matrix_row_t matrix_get_row(uint8_t row)
|
|
{
|
|
return matrix[row];
|
|
}
|
|
|
|
void matrix_print(void)
|
|
{
|
|
print("\nr/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;
|
|
}
|