347 lines
9.3 KiB
C
347 lines
9.3 KiB
C
/*
|
|
|
|
Copyright 2013 Oleg Kostyuk <cub.uanic@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/>.
|
|
*/
|
|
|
|
#include "matrix.h"
|
|
#include "wait.h"
|
|
#include "debug.h"
|
|
#include "util.h"
|
|
#include "georgi.h"
|
|
|
|
#ifndef DEBOUNCE
|
|
# define DEBOUNCE 5
|
|
#endif
|
|
|
|
// MCP Pin Defs
|
|
#define RROW1 (1<<3)
|
|
#define RROW2 (1<<2)
|
|
#define RROW3 (1<<1)
|
|
#define RROW4 (1<<0)
|
|
#define COL0 (1<<0)
|
|
#define COL1 (1<<1)
|
|
#define COL2 (1<<2)
|
|
#define COL3 (1<<3)
|
|
#define COL4 (1<<4)
|
|
#define COL5 (1<<5)
|
|
#define COL6 (1<<6)
|
|
|
|
// ATmega pin defs
|
|
#define ROW1 (1<<6)
|
|
#define ROW2 (1<<5)
|
|
#define ROW3 (1<<4)
|
|
#define ROW4 (1<<1)
|
|
#define COL7 (1<<0)
|
|
#define COL8 (1<<1)
|
|
#define COL9 (1<<2)
|
|
#define COL10 (1<<3)
|
|
#define COL11 (1<<2)
|
|
#define COL12 (1<<3)
|
|
#define COL13 (1<<6)
|
|
|
|
|
|
// bit masks
|
|
#define BMASK (COL7 | COL8 | COL9 | COL10)
|
|
#define CMASK (COL13)
|
|
#define DMASK (COL11 | COL12)
|
|
#define FMASK (ROW1 | ROW2 | ROW3 | ROW4)
|
|
#define RROWMASK (RROW1 | RROW2 | RROW3 | RROW4)
|
|
#define MCPMASK (COL0 | COL1 | COL2 | COL3 | COL4 | COL5 | COL6)
|
|
|
|
/* matrix state(1:on, 0:off) */
|
|
static matrix_row_t matrix[MATRIX_ROWS];
|
|
/*
|
|
* matrix state(1:on, 0:off)
|
|
* contains the raw values without debounce filtering of the last read cycle.
|
|
*/
|
|
static matrix_row_t raw_matrix[MATRIX_ROWS];
|
|
|
|
// Debouncing: store for each key the number of scans until it's eligible to
|
|
// change. When scanning the matrix, ignore any changes in keys that have
|
|
// already changed in the last DEBOUNCE scans.
|
|
static uint8_t debounce_matrix[MATRIX_ROWS * MATRIX_COLS];
|
|
|
|
static matrix_row_t read_cols(uint8_t row);
|
|
static void init_cols(void);
|
|
static void unselect_rows(void);
|
|
static void select_row(uint8_t row);
|
|
|
|
static uint8_t mcp23018_reset_loop;
|
|
// static uint16_t mcp23018_reset_loop;
|
|
|
|
__attribute__ ((weak))
|
|
void matrix_init_user(void) {}
|
|
|
|
__attribute__ ((weak))
|
|
void matrix_scan_user(void) {}
|
|
|
|
__attribute__ ((weak))
|
|
void matrix_init_kb(void) {
|
|
matrix_init_user();
|
|
}
|
|
|
|
__attribute__ ((weak))
|
|
void matrix_scan_kb(void) {
|
|
matrix_scan_user();
|
|
}
|
|
|
|
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
|
|
mcp23018_status = init_mcp23018();
|
|
unselect_rows();
|
|
init_cols();
|
|
|
|
// initialize matrix state: all keys off
|
|
for (uint8_t i=0; i < MATRIX_ROWS; i++) {
|
|
matrix[i] = 0;
|
|
raw_matrix[i] = 0;
|
|
for (uint8_t j=0; j < MATRIX_COLS; ++j) {
|
|
debounce_matrix[i * MATRIX_COLS + j] = 0;
|
|
}
|
|
}
|
|
|
|
matrix_init_kb();
|
|
}
|
|
|
|
void matrix_power_up(void) {
|
|
mcp23018_status = init_mcp23018();
|
|
|
|
unselect_rows();
|
|
init_cols();
|
|
|
|
// initialize matrix state: all keys off
|
|
for (uint8_t i=0; i < MATRIX_ROWS; i++) {
|
|
matrix[i] = 0;
|
|
}
|
|
}
|
|
|
|
// Returns a matrix_row_t whose bits are set if the corresponding key should be
|
|
// eligible to change in this scan.
|
|
matrix_row_t debounce_mask(matrix_row_t rawcols, uint8_t row) {
|
|
matrix_row_t result = 0;
|
|
matrix_row_t change = rawcols ^ raw_matrix[row];
|
|
raw_matrix[row] = rawcols;
|
|
for (uint8_t i = 0; i < MATRIX_COLS; ++i) {
|
|
if (debounce_matrix[row * MATRIX_COLS + i]) {
|
|
--debounce_matrix[row * MATRIX_COLS + i];
|
|
} else {
|
|
result |= (1 << i);
|
|
}
|
|
if (change & (1 << i)) {
|
|
debounce_matrix[row * MATRIX_COLS + i] = DEBOUNCE;
|
|
}
|
|
}
|
|
return result;
|
|
}
|
|
|
|
matrix_row_t debounce_read_cols(uint8_t row) {
|
|
// Read the row without debouncing filtering and store it for later usage.
|
|
matrix_row_t cols = read_cols(row);
|
|
// Get the Debounce mask.
|
|
matrix_row_t mask = debounce_mask(cols, row);
|
|
// debounce the row and return the result.
|
|
return (cols & mask) | (matrix[row] & ~mask);;
|
|
}
|
|
|
|
uint8_t matrix_scan(void)
|
|
{
|
|
// Then the keyboard
|
|
if (mcp23018_status) { // if there was an error
|
|
if (++mcp23018_reset_loop == 0) {
|
|
// if (++mcp23018_reset_loop >= 1300) {
|
|
// since mcp23018_reset_loop is 8 bit - we'll try to reset once in 255 matrix scans
|
|
// this will be approx bit more frequent than once per second
|
|
print("trying to reset mcp23018\n");
|
|
mcp23018_status = init_mcp23018();
|
|
if (mcp23018_status) {
|
|
print("left side not responding\n");
|
|
} else {
|
|
print("left side attached\n");
|
|
}
|
|
}
|
|
}
|
|
|
|
for (uint8_t i = 0; i < MATRIX_ROWS_PER_SIDE; i++) {
|
|
select_row(i);
|
|
// and select on left hand
|
|
select_row(i + MATRIX_ROWS_PER_SIDE);
|
|
// we don't need a 30us delay anymore, because selecting a
|
|
// left-hand row requires more than 30us for i2c.
|
|
|
|
// grab cols from left hand
|
|
matrix[i] = debounce_read_cols(i);
|
|
// grab cols from right hand
|
|
matrix[i + MATRIX_ROWS_PER_SIDE] = debounce_read_cols(i + MATRIX_ROWS_PER_SIDE);
|
|
|
|
unselect_rows();
|
|
}
|
|
|
|
matrix_scan_kb();
|
|
|
|
#ifdef DEBUG_MATRIX
|
|
for (uint8_t c = 0; c < MATRIX_COLS; c++)
|
|
for (uint8_t r = 0; r < MATRIX_ROWS; r++)
|
|
if (matrix_is_on(r, c)) xprintf("r:%d c:%d \n", r, c);
|
|
#endif
|
|
|
|
return 1;
|
|
}
|
|
|
|
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 0123456789ABCDEF\n");
|
|
for (uint8_t row = 0; row < MATRIX_ROWS; row++) {
|
|
print_hex8(row); print(": ");
|
|
print_bin_reverse16(matrix_get_row(row));
|
|
print("\n");
|
|
}
|
|
}
|
|
|
|
// Remember this means ROWS
|
|
static void init_cols(void)
|
|
{
|
|
// init on mcp23018
|
|
// not needed, already done as part of init_mcp23018()
|
|
|
|
// Input with pull-up(DDR:0, PORT:1)
|
|
DDRF &= ~FMASK;
|
|
PORTF |= FMASK;
|
|
}
|
|
|
|
static matrix_row_t read_cols(uint8_t row)
|
|
{
|
|
if (row < 7) {
|
|
if (mcp23018_status) { // if there was an error
|
|
return 0;
|
|
} else {
|
|
uint8_t data = 0;
|
|
mcp23018_status = i2c_start(I2C_ADDR_WRITE, ERGODOX_EZ_I2C_TIMEOUT); if (mcp23018_status) goto out;
|
|
mcp23018_status = i2c_write(GPIOB, ERGODOX_EZ_I2C_TIMEOUT); if (mcp23018_status) goto out;
|
|
mcp23018_status = i2c_start(I2C_ADDR_READ, ERGODOX_EZ_I2C_TIMEOUT); if (mcp23018_status) goto out;
|
|
mcp23018_status = i2c_read_nack(ERGODOX_EZ_I2C_TIMEOUT); if (mcp23018_status < 0) goto out;
|
|
data = ~((uint8_t)mcp23018_status);
|
|
mcp23018_status = I2C_STATUS_SUCCESS;
|
|
out:
|
|
i2c_stop();
|
|
|
|
#ifdef DEBUG_MATRIX
|
|
if (data != 0x00) xprintf("I2C: %d\n", data);
|
|
#endif
|
|
return data;
|
|
}
|
|
} else {
|
|
/* read from teensy
|
|
* bitmask is 0b0111001, but we want the lower four
|
|
* we'll return 1s for the top two, but that's harmless.
|
|
*/
|
|
// So I need to confuckulate all this
|
|
//return ~(((PIND & DMASK) >> 1 | ((PINC & CMASK) >> 6) | (PIN)));
|
|
//return ~((PINF & 0x03) | ((PINF & 0xF0) >> 2));
|
|
return ~(
|
|
(((PINF & ROW4) >> 1)
|
|
| ((PINF & (ROW1 | ROW2 | ROW3)) >> 3))
|
|
& 0xF);
|
|
}
|
|
}
|
|
|
|
// Row pin configuration
|
|
static void unselect_rows(void)
|
|
{
|
|
// no need to unselect on mcp23018, because the select step sets all
|
|
// the other row bits high, and it's not changing to a different
|
|
// direction
|
|
// Hi-Z(DDR:0, PORT:0) to unselect
|
|
DDRB &= ~(BMASK);
|
|
PORTB &= ~(BMASK);
|
|
DDRC &= ~CMASK;
|
|
PORTC &= ~CMASK;
|
|
DDRD &= ~DMASK;
|
|
PORTD &= ~DMASK;
|
|
}
|
|
|
|
static void select_row(uint8_t row)
|
|
{
|
|
if (row < 7) {
|
|
// select on mcp23018
|
|
if (mcp23018_status) { // do nothing on error
|
|
} else { // set active row low : 0 // set other rows hi-Z : 1
|
|
mcp23018_status = i2c_start(I2C_ADDR_WRITE, ERGODOX_EZ_I2C_TIMEOUT); if (mcp23018_status) goto out;
|
|
mcp23018_status = i2c_write(GPIOA, ERGODOX_EZ_I2C_TIMEOUT); if (mcp23018_status) goto out;
|
|
mcp23018_status = i2c_write(0xFF & ~(1<<row), ERGODOX_EZ_I2C_TIMEOUT); if (mcp23018_status) goto out;
|
|
out:
|
|
i2c_stop();
|
|
}
|
|
} else {
|
|
// Output low(DDR:1, PORT:0) to select
|
|
switch (row) {
|
|
case 7:
|
|
DDRB |= COL7;
|
|
PORTB &= ~COL7;
|
|
break;
|
|
case 8:
|
|
DDRB |= COL8;
|
|
PORTB &= ~COL8;
|
|
break;
|
|
case 9:
|
|
DDRB |= COL9;
|
|
PORTB &= ~COL9;
|
|
break;
|
|
case 10:
|
|
DDRB |= COL10;
|
|
PORTB &= ~COL10;
|
|
break;
|
|
case 11:
|
|
DDRD |= COL11;
|
|
PORTD &= ~COL11;
|
|
break;
|
|
case 12:
|
|
DDRD |= COL12;
|
|
PORTD &= ~COL12;
|
|
break;
|
|
case 13:
|
|
DDRC |= COL13;
|
|
PORTC &= ~COL13;
|
|
break;
|
|
}
|
|
}
|
|
}
|