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-rw-r--r--keyboards/xd84/matrix.c98
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diff --git a/keyboards/xd84/matrix.c b/keyboards/xd84/matrix.c
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-/* Copyright 2019
- *
- * 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 <stdint.h>
-#include <stdbool.h>
-#include <avr/io.h>
-#include <string.h>
-#include "matrix.h"
-#include "pca9555.h"
-#include "quantum.h"
-
-#include "debug.h"
-
-// PCA9555 slave addresses
-#define IC1 0x20
-#define IC2 0x21
-
-//_____Utility funcs___________________________________________________________
-
-static void init_pins(void) {
- // init all cols high - IC2 all input
- pca9555_set_config(IC2, PCA9555_PORT0, ALL_INPUT); // same as initial state
- pca9555_set_config(IC2, PCA9555_PORT1, ALL_INPUT); // same as initial state
-
- // init all rows - IC1 port0 input
- pca9555_set_config(IC1, PCA9555_PORT0, ALL_INPUT); // same as initial state
- pca9555_set_output(IC1, PCA9555_PORT0, ALL_LOW);
-}
-
-static void select_row(uint8_t row) {
- // For the XD84 all rows are on the same IC and port
- // so its safe enough to assume here row == pin
- uint8_t pin = row;
- uint8_t mask = 1 << pin;
-
- // we configure output once in init, as pca9555 remembers state when flipping between input/output
- // pca9555_set_output(IC1, PCA9555_PORT0, ALL_HIGH & (~mask));
- pca9555_set_config(IC1, PCA9555_PORT0, ALL_INPUT & (~mask));
-}
-
-static uint16_t read_cols(void) {
- // uint16_t state_1 = pca9555_readPins(IC2, PCA9555_PORT0);
- // uint16_t state_2 = pca9555_readPins(IC2, PCA9555_PORT1);
- uint16_t state = pca9555_readAllPins(IC2);
-
- // For the XD84 all cols are on the same IC and mapped sequentially
- // while this technically gives 16 column reads,
- // the 16th column can never be set so is safely ignored
- // return ~((state_2 << 8) | state_1);
- return ~state;
-}
-
-static bool read_cols_on_row(matrix_row_t current_matrix[], uint8_t current_row) {
- // Store last value of row prior to reading
- matrix_row_t last_row_value = current_matrix[current_row];
-
- // Clear data in matrix row
- current_matrix[current_row] = 0;
-
- // Select row and wait for row selection to stabilize
- select_row(current_row);
- // Skip the wait_us(30); as i2c is slow enough to debounce the io changes
-
- current_matrix[current_row] = read_cols();
-
- // No need to Unselect row as the next `select_row` will blank everything
-
- return (last_row_value != current_matrix[current_row]);
-}
-
-//_____CUSTOM MATRIX IMPLEMENTATION____________________________________________________
-
-void matrix_init_custom(void) {
- pca9555_init(IC1);
- pca9555_init(IC2);
-
- init_pins();
-}
-
-bool matrix_scan_custom(matrix_row_t current_matrix[]) {
- bool changed = false;
- for (uint8_t current_row = 0; current_row < MATRIX_ROWS; current_row++) {
- changed |= read_cols_on_row(current_matrix, current_row);
- }
- return changed;
-}