/* Copyright 2012 Jun Wako Copyright 2014 Jack Humbert Copyright 2017 Priyadi Iman Nurcahyo 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> #if defined(__AVR__) #include <avr/io.h> #endif #include "wait.h" #include "print.h" #include "debug.h" #include "util.h" #include "matrix.h" #include "timer.h" /* Set 0 if debouncing isn't needed */ #ifndef DEBOUNCE # define DEBOUNCE 5 #endif #if (DEBOUNCE > 0) static uint16_t debouncing_time; static bool debouncing = false; #endif #if (MATRIX_COLS <= 8) # define print_matrix_header() print("\nr/c 01234567\n") # define print_matrix_row(row) print_bin_reverse8(matrix_get_row(row)) # define ROW_SHIFTER ((uint8_t)1) #elif (MATRIX_COLS <= 16) # define print_matrix_header() print("\nr/c 0123456789ABCDEF\n") # define print_matrix_row(row) print_bin_reverse16(matrix_get_row(row)) # define ROW_SHIFTER ((uint16_t)1) #elif (MATRIX_COLS <= 32) # define print_matrix_header() print("\nr/c 0123456789ABCDEF0123456789ABCDEF\n") # define print_matrix_row(row) print_bin_reverse32(matrix_get_row(row)) # define ROW_SHIFTER ((uint32_t)1) #endif #ifdef MATRIX_MASKED extern const matrix_row_t matrix_mask[]; #endif static const uint8_t col_pins[MATRIX_COLS] = MATRIX_COL_PINS; static const uint8_t tp_pins[3] = TRACKPOINT_PINS; /* matrix state(1:on, 0:off) */ static matrix_row_t matrix[MATRIX_ROWS]; static matrix_row_t matrix_debouncing[MATRIX_ROWS]; static void init_cols(void); static bool read_cols_on_row(matrix_row_t current_matrix[], uint8_t current_row); static void unselect_rows(void); static void select_row(uint8_t row); static void unselect_row(uint8_t row); __attribute__ ((weak)) void matrix_init_kb(void) { matrix_init_user(); } __attribute__ ((weak)) void matrix_scan_kb(void) { matrix_scan_user(); } __attribute__ ((weak)) void matrix_init_user(void) { } __attribute__ ((weak)) void matrix_scan_user(void) { } 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 unselect_rows(); init_cols(); // initialize matrix state: all keys off for (uint8_t i=0; i < MATRIX_ROWS; i++) { matrix[i] = 0; matrix_debouncing[i] = 0; } matrix_init_quantum(); } uint8_t matrix_scan(void) { // Set row, read cols for (uint8_t current_row = 0; current_row < MATRIX_ROWS; current_row++) { # if (DEBOUNCE > 0) bool matrix_changed = read_cols_on_row(matrix_debouncing, current_row); if (matrix_changed) { debouncing = true; debouncing_time = timer_read(); } # else read_cols_on_row(matrix, current_row); # endif } # if (DEBOUNCE > 0) if (debouncing && (timer_elapsed(debouncing_time) > DEBOUNCE)) { for (uint8_t i = 0; i < MATRIX_ROWS; i++) { matrix[i] = matrix_debouncing[i]; } debouncing = false; } # endif matrix_scan_quantum(); 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) { // Matrix mask lets you disable switches in the returned matrix data. For example, if you have a // switch blocker installed and the switch is always pressed. #ifdef MATRIX_MASKED return matrix[row] & matrix_mask[row]; #else return matrix[row]; #endif } void matrix_print(void) { print_matrix_header(); for (uint8_t row = 0; row < MATRIX_ROWS; row++) { print_hex8(row); print(": "); print_matrix_row(row); print("\n"); } } #define ROW_MASK 0b11100000 static const uint8_t row_bit[MATRIX_ROWS] = { // 76543210 0b00000000, 0b00100000, 0b01000000, 0b01100000, 0b10000000, 0b10100000, 0b11000000, 0b11100000, }; static void init_cols(void) { // columns for(uint8_t x = 0; x < MATRIX_COLS; x++) { uint8_t pin = col_pins[x]; _SFR_IO8((pin >> 4) + 1) &= ~_BV(pin & 0xF); // IN _SFR_IO8((pin >> 4) + 2) |= _BV(pin & 0xF); // HI } // rows DDRF |= ROW_MASK; PORTF &= ~ROW_MASK; // trackpoint for(uint8_t x = 0; x < 3; x++) { uint8_t pin = tp_pins[x]; _SFR_IO8((pin >> 4) + 1) &= ~_BV(pin & 0xF); // IN _SFR_IO8((pin >> 4) + 2) |= _BV(pin & 0xF); // HI } } 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; // special case for trackpoint if (current_row == 8) { for(uint8_t tp_index = 0; tp_index < 3; tp_index++) { // Select the TP pin to read (active low) uint8_t pin = tp_pins[tp_index]; uint8_t pin_state = (_SFR_IO8(pin >> 4) & _BV(pin & 0xF)); // Populate the matrix row with the state of the col pin current_matrix[current_row] |= pin_state ? 0 : (ROW_SHIFTER << tp_index); } return (last_row_value != current_matrix[current_row]); } // Select row and wait for row selecton to stabilize select_row(current_row); _delay_us(5); // without this wait it won't read stable value. // wait_us(50); // For each col... for(uint8_t col_index = 0; col_index < MATRIX_COLS; col_index++) { // Select the col pin to read (active low) uint8_t pin = col_pins[col_index]; uint8_t pin_state = (_SFR_IO8(pin >> 4) & _BV(pin & 0xF)); // Populate the matrix row with the state of the col pin current_matrix[current_row] |= pin_state ? 0 : (ROW_SHIFTER << col_index); } // Unselect row unselect_row(current_row); return (last_row_value != current_matrix[current_row]); } static void select_row(uint8_t row) { PORTF = row_bit[row] | (PORTF & ~ROW_MASK); } static void unselect_row(uint8_t row) { } static void unselect_rows(void) { }