--- /dev/null
+/* Copyright 2018 Maarten Dekkers <maartenwut@gmail.com>
+ *
+ * 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 DEBOUNCING_DELAY
+# define DEBOUNCING_DELAY 5
+#endif
+
+#define COL_SHIFTER ((uint32_t)1)
+
+static uint16_t debouncing_time;
+static bool debouncing = false;
+
+
+static const uint8_t row_pins[MATRIX_ROWS] = MATRIX_ROW_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 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);
+
+inline
+uint8_t matrix_rows(void) {
+ return MATRIX_ROWS;
+}
+
+inline
+uint8_t matrix_cols(void) {
+ return MATRIX_COLS;
+}
+
+void matrix_init(void) {
+ unselect_cols();
+ init_rows();
+
+ // 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++) {
+ bool matrix_changed = read_rows_on_col(matrix_debouncing, current_col);
+ if (matrix_changed) {
+ debouncing = true;
+ debouncing_time = timer_read();
+ }
+ }
+
+ if (debouncing && (timer_elapsed(debouncing_time) > DEBOUNCING_DELAY)) {
+ for (uint8_t i = 0; i < MATRIX_ROWS; i++) {
+ matrix[i] = matrix_debouncing[i];
+ }
+ debouncing = false;
+ }
+
+ 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)
+{
+ return matrix[row];
+}
+
+void matrix_print(void)
+{
+ print("\nr/c 0123456789ABCDEFGHIJKLMNOPQRSTUV \n");
+
+ for (uint8_t row = 0; row < MATRIX_ROWS; row++) {
+ phex(row); print(": ");
+ print_bin_reverse32(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 += bitpop32(matrix[i]);
+ }
+ return count;
+}
+
+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 selecton 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
+ // Use the otherwise unused row: 3, col: 0 for caps lock
+ if (row_index == 2 && current_col == 2) {
+ // Pin E2 uses active low
+ if ((_SFR_IO8(E2 >> 4) & _BV(E2 & 0xF)) == 0)
+ {
+ // Pin LO, set col bit
+ current_matrix[row_index] |= (COL_SHIFTER << current_col);
+ }
+ else
+ {
+ // Pin HI, clear col bit
+ current_matrix[row_index] &= ~(COL_SHIFTER << current_col);
+ }
+ }
+ else {
+ if ((_SFR_IO8(row_pins[row_index] >> 4) & _BV(row_pins[row_index] & 0xF)))
+ {
+ // Pin HI, set col bit
+ current_matrix[row_index] |= (COL_SHIFTER << current_col);
+ }
+ else
+ {
+ // Pin LO, clear col bit
+ current_matrix[row_index] &= ~(COL_SHIFTER << current_col);
+ }
+ }
+
+ // Determine if the matrix changed state
+ if ((last_row_value != current_matrix[row_index]) && !(matrix_changed))
+ {
+ matrix_changed = true;
+ }
+ }
+
+ // Unselect cols
+ unselect_cols();
+
+ return matrix_changed;
+}
+
+/* Row pin configuration
+ * row: 0 1 2 3 4
+ * pin: D0 D1 D2 D3 D5
+ *
+ * Caps lock uses its own pin E2
+ */
+static void init_rows(void) {
+ DDRD &= ~((1<<0)| (1<<1) | (1<<2) | (1<<3) | (1<<5)); // IN
+ PORTD &= ~((1<<0)| (1<<1) | (1<<2) | (1<<3) | (1<<5)); // LO
+
+ DDRE &= ~(1<<2); // IN
+ PORTE |= (1<<2); // HI
+}
+
+/* Columns 0 - 16
+ * col 0: B5
+ * col 1: B6
+ * These columns use a 74HC237D 3 to 8 bit demultiplexer.
+ * A B C GL1
+ * col / pin: PF0 PF1 PC7 PC6
+ * 2: 0 0 0 1
+ * 3: 1 0 0 1
+ * 4: 0 1 0 1
+ * 5: 1 1 0 1
+ * 6: 0 0 1 1
+ * 7: 1 0 1 1
+ * 8: 0 1 1 1
+ * 9: 1 1 1 1
+ * col 10: E6
+ * col 11: B0
+ * col 12: B7
+ * col 13: D4
+ * col 14: D6
+ * col 15: D7
+ * col 16: B4
+ */
+static void unselect_cols(void) {
+ DDRB |= (1<<5) | (1<<6) | (1<<0) | (1<<7) | (1<<4); // OUT
+ PORTB &= ~((1<<5) | (1<<6) | (1<<0) | (1<<7) | (1<<4)); // LO
+
+ DDRD |= (1<<4) | (1<<6) | (1<<7); // OUT
+ PORTD &= ~((1<<4) | (1<<6) | (1<<7)); // LO
+
+ DDRE |= (1<<6); // OUT
+ PORTE &= ~((1<<6)); // LO
+
+ DDRF |= (1<<0) | (1<<1); // OUT
+ PORTF &= ~((1<<0) | (1<<1)); // LO
+
+ DDRC |= (1<<7) | (1<<6); // OUT
+ PORTC &= ~((1<<7) | (1<<6)); // LO
+}
+
+static void select_col(uint8_t col)
+{
+ switch (col) {
+ case 0:
+ PORTB |= (1<<5); // HI
+ break;
+ case 1:
+ PORTB |= (1<<6); // HI
+ break;
+ case 2:
+ PORTC |= (1<<6); // HI
+ break;
+ case 3:
+ PORTC |= (1<<6); // HI
+ PORTF |= (1<<0); // HI
+ break;
+ case 4:
+ PORTC |= (1<<6); // HI
+ PORTF |= (1<<1); // HI
+ break;
+ case 5:
+ PORTC |= (1<<6); // HI
+ PORTF |= (1<<0); // HI
+ PORTF |= (1<<1); // HI
+ break;
+ case 6:
+ PORTC |= (1<<6); // HI
+ PORTC |= (1<<7); // HI
+ break;
+ case 7:
+ PORTC |= (1<<6); // HI
+ PORTF |= (1<<0); // HI
+ PORTC |= (1<<7); // HI
+ break;
+ case 8:
+ PORTC |= (1<<6); // HI
+ PORTF |= (1<<1); // HI
+ PORTC |= (1<<7); // HI
+ break;
+ case 9:
+ PORTC |= (1<<6); // HI
+ PORTF |= (1<<0); // HI
+ PORTF |= (1<<1); // HI
+ PORTC |= (1<<7); // HI
+ break;
+ case 10:
+ PORTE |= (1<<6); // HI
+ break;
+ case 11:
+ PORTB |= (1<<0); // HI
+ break;
+ case 12:
+ PORTB |= (1<<7); // HI
+ break;
+ case 13:
+ PORTD |= (1<<4); // HI
+ break;
+ case 14:
+ PORTD |= (1<<6); // HI
+ break;
+ case 15:
+ PORTD |= (1<<7); // HI
+ break;
+ case 16:
+ PORTB |= (1<<4); // HI
+ break;
+ }
+}
projects / qmk_firmware.git / blobdiff