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qmk_firmware/keyboards/gboards/georgi/matrix.c
David Hoelscher e9bd7d7ad3
I2C driver cleanup (#21273) 
* remove i2c_start and i2c_stop from i2c drivers

* remove static i2c_address variable from chibios i2c driver
2024-01-17 14:05:38 +01:00

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/*
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_readReg(I2C_ADDR, GPIOB, &data, 1, ERGODOX_EZ_I2C_TIMEOUT);
#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
uint8_t data = 0xFF & ~(1<<row);
mcp23018_status = i2c_writeReg(I2C_ADDR, GPIOA, &data, 1, ERGODOX_EZ_I2C_TIMEOUT);
}
} 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;
}
}
}
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