362 lines
8.8 KiB
C
Executable File
362 lines
8.8 KiB
C
Executable File
/*
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Copyright 2012-2018 Jun Wako, Jack Humbert, Yiancar
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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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#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 "debounce.h"
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#include "quantum.h"
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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 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 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 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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#ifdef DIRECT_PINS
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static pin_t direct_pins[MATRIX_ROWS][MATRIX_COLS] = DIRECT_PINS;
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#elif (DIODE_DIRECTION == ROW2COL) || (DIODE_DIRECTION == COL2ROW)
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// static const pin_t row_pins[MATRIX_ROWS] = MATRIX_ROW_PINS;
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static const pin_t col_pins[MATRIX_COLS] = MATRIX_COL_PINS;
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#endif
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/* matrix state(1:on, 0:off) */
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static matrix_row_t raw_matrix[MATRIX_ROWS]; //raw values
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static matrix_row_t matrix[MATRIX_ROWS]; //debounced values
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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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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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print_hex8(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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#ifdef DIRECT_PINS
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static void init_pins(void) {
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for (int row = 0; row < MATRIX_ROWS; row++) {
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for (int col = 0; col < MATRIX_COLS; col++) {
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pin_t pin = direct_pins[row][col];
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if (pin != NO_PIN) {
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setPinInputHigh(pin);
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}
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}
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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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matrix_row_t last_row_value = current_matrix[current_row];
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current_matrix[current_row] = 0;
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for (uint8_t col_index = 0; col_index < MATRIX_COLS; col_index++) {
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pin_t pin = direct_pins[current_row][col_index];
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if (pin != NO_PIN) {
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current_matrix[current_row] |= readPin(pin) ? 0 : (ROW_SHIFTER << col_index);
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}
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}
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return (last_row_value != current_matrix[current_row]);
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}
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#elif (DIODE_DIRECTION == COL2ROW)
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/* Rows 0 - 5
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* These rows use a 74HC237D 3 to 8 bit demultiplexer.
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* C B A
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* row / pin: PB0 PB1 PB2
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* 0: 0 0 0
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* 1: 0 0 1
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* 2: 0 1 0
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* 3: 0 1 1
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* 4: 1 0 0
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* 5: 1 0 1
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*/
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static void select_row(uint8_t col)
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{
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switch (col) {
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case 0:
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writePinLow(B0);
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writePinLow(B1);
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writePinLow(B2);
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break;
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case 1:
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writePinLow(B0);
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writePinLow(B1);
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break;
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case 2:
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writePinLow(B0);
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writePinLow(B2);
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break;
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case 3:
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writePinLow(B0);
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break;
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case 4:
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writePinLow(B1);
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writePinLow(B2);
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break;
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case 5:
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writePinLow(B1);
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break;
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}
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}
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static void unselect_row(uint8_t col)
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{
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switch (col) {
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case 0:
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writePinHigh(B0);
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writePinHigh(B1);
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writePinHigh(B2);
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break;
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case 1:
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writePinHigh(B0);
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writePinHigh(B1);
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break;
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case 2:
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writePinHigh(B0);
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writePinHigh(B2);
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break;
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case 3:
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writePinHigh(B0);
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break;
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case 4:
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writePinHigh(B1);
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writePinHigh(B2);
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break;
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case 5:
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writePinHigh(B1);
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break;
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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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setPinOutput(B0);
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setPinOutput(B1);
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setPinOutput(B2);
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// make all pins high to select Y7, nothing is connected to that (otherwise the first row will act weird)
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writePinHigh(B0);
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writePinHigh(B1);
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writePinHigh(B2);
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}
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static void init_pins(void) {
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unselect_rows();
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for (uint8_t x = 0; x < MATRIX_COLS; x++) {
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setPinInputHigh(col_pins[x]);
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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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// Select row and wait for row selecton to stabilize
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select_row(current_row);
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wait_us(30);
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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_state = readPin(col_pins[col_index]);
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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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#elif (DIODE_DIRECTION == ROW2COL)
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static void select_col(uint8_t col)
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{
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setPinOutput(col_pins[col]);
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writePinLow(col_pins[col]);
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}
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static void unselect_col(uint8_t col)
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{
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setPinInputHigh(col_pins[col]);
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}
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static void unselect_cols(void)
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{
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for(uint8_t x = 0; x < MATRIX_COLS; x++) {
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setPinInputHigh(col_pins[x]);
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}
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}
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static void init_pins(void) {
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unselect_cols();
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for (uint8_t x = 0; x < MATRIX_ROWS; x++) {
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setPinInputHigh(row_pins[x]);
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}
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}
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static bool read_rows_on_col(matrix_row_t current_matrix[], uint8_t current_col)
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{
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bool matrix_changed = false;
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// Select col and wait for col selecton to stabilize
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select_col(current_col);
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wait_us(30);
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// For each row...
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for(uint8_t row_index = 0; row_index < MATRIX_ROWS; row_index++)
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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[row_index];
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// Check row pin state
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if (readPin(row_pins[row_index]) == 0)
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{
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// Pin LO, set col bit
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current_matrix[row_index] |= (ROW_SHIFTER << current_col);
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}
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else
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{
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// Pin HI, clear col bit
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current_matrix[row_index] &= ~(ROW_SHIFTER << current_col);
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}
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// Determine if the matrix changed state
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if ((last_row_value != current_matrix[row_index]) && !(matrix_changed))
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{
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matrix_changed = true;
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}
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}
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// Unselect col
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unselect_col(current_col);
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return matrix_changed;
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}
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#endif
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void matrix_init(void) {
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// initialize key pins
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init_pins();
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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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raw_matrix[i] = 0;
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matrix[i] = 0;
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}
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debounce_init(MATRIX_ROWS);
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matrix_init_kb();
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}
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uint8_t matrix_scan(void)
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{
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bool changed = false;
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#if defined(DIRECT_PINS) || (DIODE_DIRECTION == COL2ROW)
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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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changed |= read_cols_on_row(raw_matrix, current_row);
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}
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#elif (DIODE_DIRECTION == ROW2COL)
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// Set col, read rows
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for (uint8_t current_col = 0; current_col < MATRIX_COLS; current_col++) {
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changed |= read_rows_on_col(raw_matrix, current_col);
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}
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#endif
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debounce(raw_matrix, matrix, MATRIX_ROWS, changed);
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matrix_scan_kb();
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return 1;
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}
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