124 lines
3.8 KiB
C
124 lines
3.8 KiB
C
/* Copyright 2021 Jay Greco
|
|
*
|
|
* 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 <string.h>
|
|
#include "split_util.h"
|
|
#include "wait.h"
|
|
|
|
#define VIRT_COLS_PER_HAND 1
|
|
#define PHYS_COLS_PER_HAND (MATRIX_COLS - VIRT_COLS_PER_HAND)
|
|
#define ROWS_PER_HAND (MATRIX_ROWS / 2)
|
|
#define COL_SHIFTER ((uint32_t)1)
|
|
#define EXT_PIN_ROW 2
|
|
#define EXT_PIN_COL 8
|
|
|
|
// Row & column pins
|
|
static uint8_t row_pins_left[MATRIX_ROWS] = MATRIX_ROW_PINS;
|
|
static uint8_t col_pins_left[MATRIX_MUX_COLS] = MATRIX_COL_MUX_PINS;
|
|
static uint8_t row_pins_right[MATRIX_ROWS] = MATRIX_ROW_PINS_RIGHT;
|
|
static uint8_t col_pins_right[MATRIX_MUX_COLS] = MATRIX_COL_MUX_PINS_RIGHT;
|
|
static uint8_t* row_pins = row_pins_left;
|
|
static uint8_t* col_pins = col_pins_left;
|
|
|
|
// Internal functions
|
|
static void init_pins(void) {
|
|
// Set cols to outputs, low
|
|
for (uint8_t pin = 0; pin < MATRIX_MUX_COLS; pin++) {
|
|
setPinOutput(col_pins[pin]);
|
|
}
|
|
|
|
// Unselect cols
|
|
for (uint8_t bit = 0; bit < MATRIX_MUX_COLS; bit++) {
|
|
writePinLow(col_pins[bit]);
|
|
}
|
|
|
|
// Set rows to input, pullup
|
|
for (uint8_t pin = 0; pin < ROWS_PER_HAND; pin++) {
|
|
setPinInputHigh(row_pins[pin]);
|
|
}
|
|
|
|
// Set extended pin (only on right side)
|
|
if (!isLeftHand) {
|
|
// Set extended pin to input, pullup
|
|
setPinInputHigh(MATRIX_EXT_PIN_RIGHT);
|
|
}
|
|
}
|
|
|
|
static void select_col(uint8_t col) {
|
|
// Drive demux with correct column address
|
|
for (uint8_t bit = 0; bit < MATRIX_MUX_COLS; bit++) {
|
|
uint8_t state = (col & (0b1 << bit)) >> bit;
|
|
writePin(col_pins[bit], !state);
|
|
}
|
|
}
|
|
|
|
static void read_rows_on_col(matrix_row_t current_matrix[], uint8_t current_col) {
|
|
select_col(current_col % PHYS_COLS_PER_HAND);
|
|
wait_us(5);
|
|
|
|
// Read each row sequentially
|
|
for (uint8_t row_index = 0; row_index < ROWS_PER_HAND; row_index++) {
|
|
if (readPin(row_pins[row_index]) == 0) {
|
|
current_matrix[row_index] |= (COL_SHIFTER << current_col);
|
|
} else {
|
|
current_matrix[row_index] &= ~(COL_SHIFTER << current_col);
|
|
}
|
|
}
|
|
}
|
|
|
|
static void read_ext_pin(matrix_row_t current_matrix[]) {
|
|
// Read the state of the extended matrix pin
|
|
if (!isLeftHand) {
|
|
if (readPin(MATRIX_EXT_PIN_RIGHT) == 0) {
|
|
current_matrix[EXT_PIN_ROW] |= (COL_SHIFTER << EXT_PIN_COL);
|
|
} else {
|
|
current_matrix[EXT_PIN_ROW] &= ~(COL_SHIFTER << EXT_PIN_COL);
|
|
}
|
|
}
|
|
}
|
|
|
|
void matrix_init_custom(void) {
|
|
if (!isLeftHand) {
|
|
row_pins = row_pins_right;
|
|
col_pins = col_pins_right;
|
|
}
|
|
|
|
init_pins();
|
|
}
|
|
|
|
bool matrix_scan_custom(matrix_row_t current_matrix[]) {
|
|
matrix_row_t last_matrix[MATRIX_ROWS];
|
|
memcpy(last_matrix, current_matrix, sizeof(last_matrix));
|
|
|
|
#ifdef DEBUG_SLOW_MATRIX
|
|
// Slow for debugging
|
|
wait_ms(1000);
|
|
#endif
|
|
|
|
// Set col, read rows
|
|
for (uint8_t current_col = 0; current_col < PHYS_COLS_PER_HAND; current_col++) {
|
|
read_rows_on_col(current_matrix, current_col);
|
|
}
|
|
|
|
// Read extended pin and store in matrix
|
|
read_ext_pin(current_matrix);
|
|
|
|
// Check if the matrix changed
|
|
bool changed = memcmp(last_matrix, current_matrix, sizeof(last_matrix)) != 0;
|
|
|
|
return changed;
|
|
}
|