/* Copyright 2012-2018 Jun Wako, Jack Humbert, Yiancar Copyright 2019 Evy Dekkers 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 . */ #include "wait.h" #include "util.h" #include "matrix.h" #include "debounce.h" #ifdef DIRECT_PINS static pin_t direct_pins[MATRIX_ROWS][MATRIX_COLS] = DIRECT_PINS; #elif (DIODE_DIRECTION == ROW2COL) || (DIODE_DIRECTION == COL2ROW) static const pin_t row_pins[MATRIX_ROWS] = MATRIX_ROW_PINS; //static const pin_t col_pins[MATRIX_COLS] = MATRIX_COL_PINS; #endif // matrix code #ifdef DIRECT_PINS static void init_pins(void) { for (int row = 0; row < MATRIX_ROWS; row++) { for (int col = 0; col < MATRIX_COLS; col++) { pin_t pin = direct_pins[row][col]; if (pin != NO_PIN) { gpio_set_pin_input_high(pin); } } } } static bool read_cols_on_row(matrix_row_t current_matrix[], uint8_t current_row) { matrix_row_t last_row_value = current_matrix[current_row]; current_matrix[current_row] = 0; for (uint8_t col_index = 0; col_index < MATRIX_COLS; col_index++) { pin_t pin = direct_pins[current_row][col_index]; if (pin != NO_PIN) { current_matrix[current_row] |= gpio_read_pin(pin) ? 0 : (MATRIX_ROW_SHIFTER << col_index); } } return (last_row_value != current_matrix[current_row]); } #elif (DIODE_DIRECTION == ROW2COL) /* Cols 0 - 14 * These columns use two 74HC138 3 to 8 bit demultiplexer. B0, F1 is the enable pin, must be set high (1) to use it. * * col / pin: PF4 PF1 PF0 PF5 PF6 * 0: 0 ── 0 ── 1 1 ── 0 * ───────────────────────────────────── * 1: 0 ── 1 ── 0 1 ── 0 * ───────────────────────────────────── * 2: 0 ── 1 ── 1 1 ── 0 * ───────────────────────────────────── * 3: 1 ── 0 ── 0 1 ── 0 * ───────────────────────────────────── * 4: 1 ── 0 ── 1 1 ── 0 * ───────────────────────────────────── * 5: 1 ── 1 ── 1 1 ── 0 * ───────────────────────────────────── * 6: 1 ── 1 ── 1 0 ── 1 * ───────────────────────────────────── * 7: 0 ── 0 ── 0 0 ── 1 * ───────────────────────────────────── * 8: 0 ── 0 ── 1 0 ── 1 * ───────────────────────────────────── * 9: 0 ── 1 ── 0 0 ── 1 * ───────────────────────────────────── *10: 0 ── 1 ── 1 0 ── 1 * ───────────────────────────────────── *11: 1 ── 0 ── 0 0 ── 1 * ───────────────────────────────────── *12: 1 ── 0 ── 1 0 ── 1 * ───────────────────────────────────── *13: 1 ── 1 ── 0 0 ── 1 * ───────────────────────────────────── *14: 0 ── 0 ── 0 1 ── 0 * */ static void select_col(uint8_t col) { switch (col) { case 0: gpio_write_pin_low(F4); gpio_write_pin_low(F1); gpio_write_pin_high(F0); gpio_write_pin_high(F5); break; case 1: gpio_write_pin_low(F4); gpio_write_pin_high(F1); gpio_write_pin_low(F0); gpio_write_pin_high(F5); break; case 2: gpio_write_pin_low(F4); gpio_write_pin_high(F1); gpio_write_pin_high(F0); gpio_write_pin_high(F5); break; case 3: gpio_write_pin_high(F4); gpio_write_pin_low(F1); gpio_write_pin_low(F0); gpio_write_pin_high(F5); break; case 4: gpio_write_pin_high(F4); gpio_write_pin_low(F1); gpio_write_pin_high(F0); gpio_write_pin_high(F5); break; case 5: gpio_write_pin_high(F4); gpio_write_pin_high(F1); gpio_write_pin_high(F0); gpio_write_pin_high(F5); break; case 6: gpio_write_pin_high(F4); gpio_write_pin_high(F1); gpio_write_pin_high(F0); gpio_write_pin_high(F6); break; case 7: gpio_write_pin_low(F4); gpio_write_pin_low(F1); gpio_write_pin_low(F0); gpio_write_pin_high(F6); break; case 8: gpio_write_pin_low(F4); gpio_write_pin_low(F1); gpio_write_pin_high(F0); gpio_write_pin_high(F6); break; case 9: gpio_write_pin_low(F4); gpio_write_pin_high(F1); gpio_write_pin_low(F0); gpio_write_pin_high(F6); break; case 10: gpio_write_pin_low(F4); gpio_write_pin_high(F1); gpio_write_pin_high(F0); gpio_write_pin_high(F6); break; case 11: gpio_write_pin_high(F4); gpio_write_pin_low(F1); gpio_write_pin_low(F0); gpio_write_pin_high(F6); break; case 12: gpio_write_pin_high(F4); gpio_write_pin_low(F1); gpio_write_pin_high(F0); gpio_write_pin_high(F6); break; case 13: gpio_write_pin_high(F4); gpio_write_pin_high(F1); gpio_write_pin_low(F0); gpio_write_pin_high(F6); break; case 14: gpio_write_pin_low(F4); gpio_write_pin_low(F1); gpio_write_pin_low(F0); gpio_write_pin_high(F5); break; } } static void unselect_col(uint8_t col) { switch (col) { case 0: gpio_write_pin_high(F4); gpio_write_pin_high(F1); gpio_write_pin_low(F0); gpio_write_pin_low(F5); break; case 1: gpio_write_pin_high(F4); gpio_write_pin_low(F1); gpio_write_pin_high(F0); gpio_write_pin_low(F5); break; case 2: gpio_write_pin_high(F4); gpio_write_pin_low(F1); gpio_write_pin_low(F0); gpio_write_pin_low(F5); break; case 3: gpio_write_pin_low(F4); gpio_write_pin_high(F1); gpio_write_pin_high(F0); gpio_write_pin_low(F5); break; case 4: gpio_write_pin_low(F4); gpio_write_pin_high(F1); gpio_write_pin_low(F0); gpio_write_pin_low(F5); break; case 5: gpio_write_pin_low(F4); gpio_write_pin_low(F1); gpio_write_pin_low(F0); gpio_write_pin_low(F5); break; case 6: gpio_write_pin_low(F4); gpio_write_pin_low(F1); gpio_write_pin_low(F0); gpio_write_pin_low(F6); break; case 7: gpio_write_pin_high(F4); gpio_write_pin_high(F1); gpio_write_pin_high(F0); gpio_write_pin_low(F6); break; case 8: gpio_write_pin_high(F4); gpio_write_pin_high(F1); gpio_write_pin_low(F0); gpio_write_pin_low(F6); break; case 9: gpio_write_pin_high(F4); gpio_write_pin_low(F1); gpio_write_pin_high(F0); gpio_write_pin_low(F6); break; case 10: gpio_write_pin_high(F4); gpio_write_pin_low(F1); gpio_write_pin_low(F0); gpio_write_pin_low(F6); break; case 11: gpio_write_pin_low(F4); gpio_write_pin_high(F1); gpio_write_pin_high(F0); gpio_write_pin_low(F6); break; case 12: gpio_write_pin_low(F4); gpio_write_pin_high(F1); gpio_write_pin_low(F0); gpio_write_pin_low(F6); break; case 13: gpio_write_pin_low(F4); gpio_write_pin_low(F1); gpio_write_pin_high(F0); gpio_write_pin_low(F6); break; case 14: gpio_write_pin_high(F4); gpio_write_pin_high(F1); gpio_write_pin_high(F0); gpio_write_pin_low(F5); break; } } static void unselect_cols(void) { //Demultiplexer gpio_write_pin_high(F0); gpio_write_pin_high(F1); gpio_write_pin_high(F4); gpio_write_pin_low(F5); gpio_write_pin_low(F6); } static void init_pins(void) { unselect_cols(); for (uint8_t x = 0; x < MATRIX_ROWS; x++) { gpio_set_pin_input_high(row_pins[x]); } gpio_set_pin_output(F0); gpio_set_pin_output(F1); gpio_set_pin_output(F4); gpio_set_pin_output(F5); gpio_set_pin_output(F6); } static bool read_rows_on_col(matrix_row_t current_matrix[], uint8_t current_col) { bool matrix_changed = false; // Select col and wait for col selecton to stabilize select_col(current_col); wait_us(30); // For each row... for (uint8_t row_index = 0; row_index < MATRIX_ROWS; row_index++) { // Store last value of row prior to reading matrix_row_t last_row_value = current_matrix[row_index]; // Check row pin state if (gpio_read_pin(row_pins[row_index]) == 0) { // Pin LO, set col bit current_matrix[row_index] |= (MATRIX_ROW_SHIFTER << current_col); } else { // Pin HI, clear col bit current_matrix[row_index] &= ~(MATRIX_ROW_SHIFTER << current_col); } // Determine if the matrix changed state if ((last_row_value != current_matrix[row_index]) && !(matrix_changed)) { matrix_changed = true; } } // Unselect col unselect_col(current_col); return matrix_changed; } #endif void matrix_init_custom(void) { // initialize key pins init_pins(); } bool matrix_scan_custom(matrix_row_t current_matrix[]) { bool changed = false; #if defined(DIRECT_PINS) || (DIODE_DIRECTION == ROW2COL) // Set col, read rows for (uint8_t current_col = 0; current_col < MATRIX_COLS; current_col++) { changed |= read_rows_on_col(current_matrix, current_col); } #endif return changed; }