307 lines
7.4 KiB
C
307 lines
7.4 KiB
C
/*
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Copyright 2012 Jun Wako
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Copyright 2014 Jack Humbert
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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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/* Set 0 if debouncing isn't needed */
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/*
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* This constant define not debouncing time in msecs, but amount of matrix
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* scan loops which should be made to get stable debounced results.
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*
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* On Ergodox matrix scan rate is relatively low, because of slow I2C.
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* Now it's only 317 scans/second, or about 3.15 msec/scan.
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* According to Cherry specs, debouncing time is 5 msec.
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*
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* And so, there is no sense to have DEBOUNCE higher than 2.
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*/
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#ifndef DEBOUNCING_DELAY
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# define DEBOUNCING_DELAY 5
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#endif
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static uint8_t debouncing = DEBOUNCING_DELAY;
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static const uint8_t row_pins[MATRIX_ROWS] = MATRIX_ROW_PINS;
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static const uint8_t col_pins[MATRIX_COLS] = MATRIX_COL_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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#if DIODE_DIRECTION == ROW2COL
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static matrix_row_t matrix_reversed[MATRIX_COLS];
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static matrix_row_t matrix_reversed_debouncing[MATRIX_COLS];
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#endif
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#if MATRIX_COLS > 16
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#define SHIFTER 1UL
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#else
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#define SHIFTER 1
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#endif
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static matrix_row_t read_cols(void);
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static void init_cols(void);
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static void unselect_rows(void);
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static void select_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_power_up(void) {
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// #if DIODE_DIRECTION == COL2ROW
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// for (int8_t r = MATRIX_ROWS - 1; r >= 0; --r) {
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// /* DDRxn */
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// _SFR_IO8((row_pins[r] >> 4) + 1) |= _BV(row_pins[r] & 0xF);
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// toggle_row(r);
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// }
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// for (int8_t c = MATRIX_COLS - 1; c >= 0; --c) {
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// /* PORTxn */
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// _SFR_IO8((col_pins[c] >> 4) + 2) |= _BV(col_pins[c] & 0xF);
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// }
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// #else
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// for (int8_t c = MATRIX_COLS - 1; c >= 0; --c) {
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// /* DDRxn */
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// _SFR_IO8((col_pins[c] >> 4) + 1) |= _BV(col_pins[c] & 0xF);
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// toggle_col(c);
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// }
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// for (int8_t r = MATRIX_ROWS - 1; r >= 0; --r) {
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// /* PORTxn */
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// _SFR_IO8((row_pins[r] >> 4) + 2) |= _BV(row_pins[r] & 0xF);
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// }
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// #endif
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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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#ifdef __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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#if DIODE_DIRECTION == COL2ROW
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for (uint8_t i = 0; i < MATRIX_ROWS; i++) {
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select_row(i);
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wait_us(30); // without this wait read unstable value.
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matrix_row_t cols = read_cols();
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if (matrix_debouncing[i] != cols) {
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matrix_debouncing[i] = cols;
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if (debouncing) {
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debug("bounce!: "); debug_hex(debouncing); debug("\n");
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}
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debouncing = DEBOUNCING_DELAY;
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}
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unselect_rows();
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}
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if (debouncing) {
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if (--debouncing) {
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wait_us(1);
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} else {
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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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}
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}
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#else
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for (uint8_t i = 0; i < MATRIX_COLS; i++) {
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select_row(i);
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wait_us(30); // without this wait read unstable value.
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matrix_row_t rows = read_cols();
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if (matrix_reversed_debouncing[i] != rows) {
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matrix_reversed_debouncing[i] = rows;
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if (debouncing) {
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debug("bounce!: "); debug_hex(debouncing); debug("\n");
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}
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debouncing = DEBOUNCING_DELAY;
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}
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unselect_rows();
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}
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if (debouncing) {
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if (--debouncing) {
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wait_us(1);
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} else {
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for (uint8_t i = 0; i < MATRIX_COLS; i++) {
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matrix_reversed[i] = matrix_reversed_debouncing[i];
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}
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}
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}
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for (uint8_t y = 0; y < MATRIX_ROWS; y++) {
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matrix_row_t row = 0;
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for (uint8_t x = 0; x < MATRIX_COLS; x++) {
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row |= ((matrix_reversed[x] & (1<<y)) >> y) << x;
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}
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matrix[y] = row;
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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) return false;
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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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return matrix[row];
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}
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void matrix_print(void)
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{
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print("\nr/c 0123456789ABCDEF\n");
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for (uint8_t row = 0; row < MATRIX_ROWS; row++) {
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phex(row); print(": ");
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pbin_reverse16(matrix_get_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 += bitpop16(matrix[i]);
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}
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return count;
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}
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static void init_cols(void)
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{
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#if DIODE_DIRECTION == COL2ROW
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for(int x = 0; x < MATRIX_COLS; x++) {
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int pin = col_pins[x];
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#else
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for(int x = 0; x < MATRIX_ROWS; x++) {
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int pin = row_pins[x];
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#endif
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_SFR_IO8((pin >> 4) + 1) &= ~_BV(pin & 0xF);
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_SFR_IO8((pin >> 4) + 2) |= _BV(pin & 0xF);
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}
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}
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static matrix_row_t read_cols(void)
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{
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matrix_row_t result = 0;
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#if DIODE_DIRECTION == COL2ROW
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for(int x = 0; x < MATRIX_COLS; x++) {
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int pin = col_pins[x];
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#else
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for(int x = 0; x < MATRIX_ROWS; x++) {
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int pin = row_pins[x];
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#endif
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result |= (_SFR_IO8(pin >> 4) & _BV(pin & 0xF)) ? 0 : (SHIFTER << x);
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}
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return result;
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}
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static void unselect_rows(void)
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{
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#if DIODE_DIRECTION == COL2ROW
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for(int x = 0; x < MATRIX_ROWS; x++) {
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int pin = row_pins[x];
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#else
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for(int x = 0; x < MATRIX_COLS; x++) {
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int pin = col_pins[x];
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#endif
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_SFR_IO8((pin >> 4) + 1) &= ~_BV(pin & 0xF);
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_SFR_IO8((pin >> 4) + 2) |= _BV(pin & 0xF);
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}
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}
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static void select_row(uint8_t row)
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{
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#if DIODE_DIRECTION == COL2ROW
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int pin = row_pins[row];
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#else
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int pin = col_pins[row];
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#endif
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_SFR_IO8((pin >> 4) + 1) |= _BV(pin & 0xF);
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_SFR_IO8((pin >> 4) + 2) &= ~_BV(pin & 0xF);
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}
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