/* * Copyright 2020 Michael Schwingen * 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 "util.h" #include "matrix.h" #include "debounce.h" #include "quantum.h" #include "spi_master.h" #include "print.h" #include "modelm.h" #define DEBUG 0 #define SPI_TIMEOUT 100 /* Keyboard Matrix Assignments */ static uint16_t row_bits[MATRIX_ROWS] = { 0x4000, 0x8000, 0x2000, 0x1000, 0x0800, 0x0400, 0x0100, 0x0200, 0x0040, 0x0080, 0x0020, 0x0010, 0x0008, 0x0004, 0x0001, 0x0002}; static const pin_t col_pins[MATRIX_COLS] = {D1, D4, D7, B4, F7, F6, F5, F4}; static void select_col(uint8_t col) { setPinOutput(col_pins[col]); writePinLow(col_pins[col]); } static void unselect_col(uint8_t col) { setPinInputHigh(col_pins[col]); } static void unselect_cols(void) { for (uint8_t x = 0; x < MATRIX_COLS; x++) { setPinInputHigh(col_pins[x]); } } static bool read_rows_on_col(matrix_row_t current_matrix[], uint8_t current_col) { uint16_t row_data; bool matrix_changed = false; // Select col and wait for col selecton to stabilize select_col(current_col); matrix_io_delay(); writePinLow(SR_LOAD_PIN); writePinHigh(SR_LOAD_PIN); row_data = spi_read() << 8; row_data |= spi_read(); #if DEBUG print_hex8(~row_data); uprint(" "); #endif // 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]; matrix_row_t current_row_value = last_row_value; // Check row pin state if ((row_data & row_bits[row_index]) == 0) { // Pin LO, set col bit current_row_value |= (MATRIX_ROW_SHIFTER << current_col); } else { // Pin HI, clear col bit current_row_value &= ~(MATRIX_ROW_SHIFTER << current_col); } // Determine if the matrix changed state if ((last_row_value != current_row_value)) { matrix_changed = true; current_matrix[row_index] = current_row_value; } } // Unselect col unselect_col(current_col); return matrix_changed; } void matrix_init_custom(void) { unselect_cols(); // set 4MHz SPI clock SPSR = 0; SPCR = _BV(SPE) | _BV(MSTR) | _BV(CPOL); } bool matrix_scan_custom(matrix_row_t current_matrix[]) { bool changed = false; #if DEBUG uprint("\r\nScan: "); #endif // 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); } update_layer_leds(); return changed; }