Jack Humbert
8 years ago
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/*
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Copyright 2012 Jun Wako
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Copyright 2014 Jack Humbert
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Copyright 2017 Priyadi Iman Nurcahyo
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <stdint.h>
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#include <stdbool.h>
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#if defined(__AVR__)
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#include <avr/io.h>
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#endif
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#include "wait.h"
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#include "print.h"
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#include "debug.h"
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#include "util.h"
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#include "matrix.h"
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#include "timer.h"
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/* Set 0 if debouncing isn't needed */
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#ifndef DEBOUNCING_DELAY
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# define DEBOUNCING_DELAY 5
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#endif
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#if (DEBOUNCING_DELAY > 0)
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static uint16_t debouncing_time;
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static bool debouncing = false;
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#endif
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#if (MATRIX_COLS <= 8)
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# define print_matrix_header() print("\nr/c 01234567\n")
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# define print_matrix_row(row) print_bin_reverse8(matrix_get_row(row))
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# define matrix_bitpop(i) bitpop(matrix[i])
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# define ROW_SHIFTER ((uint8_t)1)
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#elif (MATRIX_COLS <= 16)
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# define print_matrix_header() print("\nr/c 0123456789ABCDEF\n")
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# define print_matrix_row(row) print_bin_reverse16(matrix_get_row(row))
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# define matrix_bitpop(i) bitpop16(matrix[i])
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# define ROW_SHIFTER ((uint16_t)1)
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#elif (MATRIX_COLS <= 32)
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# define print_matrix_header() print("\nr/c 0123456789ABCDEF0123456789ABCDEF\n")
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# define print_matrix_row(row) print_bin_reverse32(matrix_get_row(row))
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# define matrix_bitpop(i) bitpop32(matrix[i])
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# define ROW_SHIFTER ((uint32_t)1)
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#endif
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#ifdef MATRIX_MASKED
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extern const matrix_row_t matrix_mask[];
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#endif
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static const uint8_t col_pins[MATRIX_COLS] = MATRIX_COL_PINS;
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static const uint8_t tp_pins[3] = TRACKPOINT_PINS;
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/* matrix state(1:on, 0:off) */
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static matrix_row_t matrix[MATRIX_ROWS];
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static matrix_row_t matrix_debouncing[MATRIX_ROWS];
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static void init_cols(void);
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static bool read_cols_on_row(matrix_row_t current_matrix[], uint8_t current_row);
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static void unselect_rows(void);
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static void select_row(uint8_t row);
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static void unselect_row(uint8_t row);
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__attribute__ ((weak))
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void matrix_init_quantum(void) {
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matrix_init_kb();
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}
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__attribute__ ((weak))
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void matrix_scan_quantum(void) {
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matrix_scan_kb();
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}
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__attribute__ ((weak))
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void matrix_init_kb(void) {
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matrix_init_user();
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}
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__attribute__ ((weak))
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void matrix_scan_kb(void) {
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matrix_scan_user();
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}
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__attribute__ ((weak))
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void matrix_init_user(void) {
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}
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__attribute__ ((weak))
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void matrix_scan_user(void) {
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}
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inline
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uint8_t matrix_rows(void) {
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return MATRIX_ROWS;
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}
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inline
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uint8_t matrix_cols(void) {
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return MATRIX_COLS;
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}
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void matrix_init(void) {
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// To use PORTF disable JTAG with writing JTD bit twice within four cycles.
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#if (defined(__AVR_AT90USB1286__) || defined(__AVR_AT90USB1287__) || defined(__AVR_ATmega32U4__))
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MCUCR |= _BV(JTD);
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MCUCR |= _BV(JTD);
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#endif
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// initialize row and col
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unselect_rows();
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init_cols();
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// initialize matrix state: all keys off
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for (uint8_t i=0; i < MATRIX_ROWS; i++) {
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matrix[i] = 0;
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matrix_debouncing[i] = 0;
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}
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matrix_init_quantum();
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}
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uint8_t matrix_scan(void
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){
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// Set row, read cols
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for (uint8_t current_row = 0; current_row < MATRIX_ROWS; current_row++) {
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# if (DEBOUNCING_DELAY > 0)
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bool matrix_changed = read_cols_on_row(matrix_debouncing, current_row);
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if (matrix_changed) {
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debouncing = true;
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debouncing_time = timer_read();
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}
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# else
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read_cols_on_row(matrix, current_row);
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# endif
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}
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# if (DEBOUNCING_DELAY > 0)
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if (debouncing && (timer_elapsed(debouncing_time) > DEBOUNCING_DELAY)) {
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for (uint8_t i = 0; i < MATRIX_ROWS; i++) {
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matrix[i] = matrix_debouncing[i];
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}
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debouncing = false;
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}
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# endif
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matrix_scan_quantum();
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return 1;
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}
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bool matrix_is_modified(void)
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{
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#if (DEBOUNCING_DELAY > 0)
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if (debouncing) return false;
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#endif
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return true;
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}
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inline
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bool matrix_is_on(uint8_t row, uint8_t col)
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{
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return (matrix[row] & ((matrix_row_t)1<col));
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}
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inline
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matrix_row_t matrix_get_row(uint8_t row)
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{
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// Matrix mask lets you disable switches in the returned matrix data. For example, if you have a
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// switch blocker installed and the switch is always pressed.
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#ifdef MATRIX_MASKED
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return matrix[row] & matrix_mask[row];
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#else
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return matrix[row];
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#endif
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}
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void matrix_print(void)
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{
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print_matrix_header();
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for (uint8_t row = 0; row < MATRIX_ROWS; row++) {
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phex(row); print(": ");
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print_matrix_row(row);
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print("\n");
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}
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}
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uint8_t matrix_key_count(void)
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{
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uint8_t count = 0;
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for (uint8_t i = 0; i < MATRIX_ROWS; i++) {
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count += matrix_bitpop(i);
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}
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return count;
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}
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#define ROW_MASK 0b11100000
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static const uint8_t row_bit[MATRIX_ROWS] = {
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// 76543210
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0b00000000,
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0b00100000,
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0b01000000,
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0b01100000,
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0b10000000,
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0b10100000,
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0b11000000,
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0b11100000,
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};
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static void init_cols(void)
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{
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// columns
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for(uint8_t x = 0; x < MATRIX_COLS; x++) {
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uint8_t pin = col_pins[x];
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_SFR_IO8((pin >> 4) + 1) &= ~_BV(pin & 0xF); // IN
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_SFR_IO8((pin >> 4) + 2) |= _BV(pin & 0xF); // HI
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}
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// rows
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DDRF |= ROW_MASK;
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PORTF &= ~ROW_MASK;
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// trackpoint
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for(uint8_t x = 0; x < 3; x++) {
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uint8_t pin = tp_pins[x];
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_SFR_IO8((pin >> 4) + 1) &= ~_BV(pin & 0xF); // IN
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_SFR_IO8((pin >> 4) + 2) |= _BV(pin & 0xF); // HI
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}
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}
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static bool read_cols_on_row(matrix_row_t current_matrix[], uint8_t current_row)
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{
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// Store last value of row prior to reading
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matrix_row_t last_row_value = current_matrix[current_row];
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// Clear data in matrix row
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current_matrix[current_row] = 0;
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// special case for trackpoint
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if (current_row == 8) {
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for(uint8_t tp_index = 0; tp_index < 3; tp_index++) {
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// Select the TP pin to read (active low)
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uint8_t pin = tp_pins[tp_index];
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uint8_t pin_state = (_SFR_IO8(pin >> 4) & _BV(pin & 0xF));
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// Populate the matrix row with the state of the col pin
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current_matrix[current_row] |= pin_state ? 0 : (ROW_SHIFTER << tp_index);
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}
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return (last_row_value != current_matrix[current_row]);
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}
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// Select row and wait for row selecton to stabilize
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select_row(current_row);
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_delay_us(5); // without this wait it won't read stable value.
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// wait_us(50);
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// For each col...
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for(uint8_t col_index = 0; col_index < MATRIX_COLS; col_index++) {
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// Select the col pin to read (active low)
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uint8_t pin = col_pins[col_index];
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uint8_t pin_state = (_SFR_IO8(pin >> 4) & _BV(pin & 0xF));
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// Populate the matrix row with the state of the col pin
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current_matrix[current_row] |= pin_state ? 0 : (ROW_SHIFTER << col_index);
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}
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// Unselect row
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unselect_row(current_row);
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return (last_row_value != current_matrix[current_row]);
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}
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static void select_row(uint8_t row)
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{
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PORTF = row_bit[row] | (PORTF & ~ROW_MASK);
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}
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static void unselect_row(uint8_t row)
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{
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}
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static void unselect_rows(void)
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{
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}
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