/* Copyright 2012 Jun Wako <wakojun@gmail.com> Copyright 2017 Cole Markham <cole@ccmcomputing.net> 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/>. */ /* * scan matrix */ #include <stdint.h> #include <stdbool.h> #if defined(__AVR__) #include <avr/io.h> #endif #include "meira.h" #include "wait.h" #include "print.h" #include "debug.h" #include "util.h" #include "matrix.h" #include "config.h" #include "timer.h" #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 matrix_bitpop(i) bitpop(matrix[i]) # 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 matrix_bitpop(i) bitpop16(matrix[i]) # 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 matrix_bitpop(i) bitpop32(matrix[i]) # define ROW_SHIFTER ((uint32_t)1) #endif static matrix_row_t matrix_debouncing[MATRIX_ROWS]; static const uint8_t row_pins[MATRIX_ROWS] = MATRIX_ROW_PINS; static const uint8_t col_pins[4] = MATRIX_COL_PINS_SCANNED; //static const uint8_t lrow_pins[MATRIX_ROWS] = LED_ROW_PINS; //static const uint8_t lcol_pins[4] = LED_COL_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_rows(void); //static void init_lcols(void); static bool read_rows_on_col(matrix_row_t current_matrix[], uint8_t current_col); static void unselect_cols(void); static void select_col(uint8_t col); __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) { debug_enable = true; debug_matrix = true; debug_mouse = true; // initialize row and col unselect_cols(); init_rows(); // init_lcols(); // 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 col, read rows for (uint8_t current_col = 0; current_col < MATRIX_COLS; current_col++) { # if (DEBOUNCE > 0) bool matrix_changed = read_rows_on_col(matrix_debouncing, current_col); if (matrix_changed) { debouncing = true; debouncing_time = timer_read(); } # else read_rows_on_col(matrix, current_col); # 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 return 1; } uint8_t matrix_scan(void) { uint8_t ret = _matrix_scan(); matrix_scan_quantum(); return ret; } bool matrix_is_modified(void) { if (debouncing) return false; return true; } 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) { return matrix[row]; } void matrix_print(void) { print("\nr/c 0123456789ABCDEF\n"); for (uint8_t row = 0; row < MATRIX_ROWS; row++) { print_hex8(row); print(": "); print_bin_reverse16(matrix_get_row(row)); print("\n"); } } uint8_t matrix_key_count(void) { uint8_t count = 0; for (uint8_t i = 0; i < MATRIX_ROWS; i++) { count += bitpop16(matrix[i]); } return count; } static void init_rows(void) { for(uint8_t x = 0; x < MATRIX_ROWS; x++) { uint8_t pin = row_pins[x]; _SFR_IO8((pin >> 4) + 1) &= ~_BV(pin & 0xF); // IN _SFR_IO8((pin >> 4) + 2) |= _BV(pin & 0xF); // HI } } 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 selection 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 ((_SFR_IO8(row_pins[row_index] >> 4) & _BV(row_pins[row_index] & 0xF)) == 0) { // Pin LO, set col bit current_matrix[row_index] |= (ROW_SHIFTER << current_col); } else { // Pin HI, clear col bit current_matrix[row_index] &= ~(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_cols(); return matrix_changed; } static void select_col(uint8_t col) { #ifdef FLIPPED_BOARD col = MATRIX_COLS - col - 1; #endif for(uint8_t x = 0; x < 4; x++) { uint8_t pin = col_pins[x]; _SFR_IO8((pin >> 4) + 1) |= _BV(pin & 0xF); // OUT if (((col >> x) & 0x1) == 1){ _SFR_IO8((pin >> 4) + 2) |= _BV(pin & 0xF); // HIGH } else { _SFR_IO8((pin >> 4) + 2) &= ~_BV(pin & 0xF); // LOW } } } static void unselect_cols(void) { // FIXME This really needs to use the global enable on the decoder, because currently this sets the value to col1 for(uint8_t x = 0; x < 4; x++) { uint8_t pin = col_pins[x]; _SFR_IO8((pin >> 4) + 1) |= _BV(pin & 0xF); // OUT _SFR_IO8((pin >> 4) + 2) &= ~_BV(pin & 0xF); // LOW } }