- /*
- Copyright 2017-2019 Mathias Andersson <wraul@dbox.se>
-
- 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>
- #include "wait.h"
- #include "print.h"
- #include "debug.h"
- #include "util.h"
- #include "matrix.h"
- #include "debounce.h"
- #include "quantum.h"
-
- #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 const pin_t row_pins[MATRIX_ROWS] = MATRIX_ROW_PINS;
- static const pin_t col_pins[MATRIX_COLS] = MATRIX_COL_PINS;
-
- /* matrix state(1:on, 0:off) */
- static matrix_row_t raw_matrix[MATRIX_ROWS]; // raw values
- static matrix_row_t matrix[MATRIX_ROWS]; // debounced values
-
- __attribute__((weak)) void matrix_init_quantum(void) { matrix_init_kb(); }
-
- __attribute__((weak)) void matrix_scan_quantum(void) { matrix_scan_kb(); }
-
- __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; }
-
- 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_matrix_header();
-
- for (uint8_t row = 0; row < MATRIX_ROWS; row++) {
- print_hex8(row);
- print(": ");
- print_matrix_row(row);
- print("\n");
- }
- }
-
- uint8_t matrix_key_count(void) {
- uint8_t count = 0;
- for (uint8_t i = 0; i < MATRIX_ROWS; i++) {
- count += matrix_bitpop(i);
- }
- return count;
- }
-
- /* Columns 0 - 15
- * These columns uses two 74HC237D 3 to 8 bit demultiplexers.
- * col / pin: PB6 PC6 PC7 PF1 PF0
- * 0: 0 1 0 0 0
- * 1: 0 1 0 0 1
- * 2: 0 1 0 1 0
- * 3: 0 1 0 1 1
- * 4: 0 1 1 0 0
- * 5: 0 1 1 0 1
- * 6: 0 1 1 1 0
- * 7: 0 1 1 1 1
- * 8: 1 0 0 0 0
- * 9: 1 0 0 0 1
- * 10: 1 0 0 1 0
- * 11: 1 0 0 1 1
- * 12: 1 0 1 0 0
- * 13: 1 0 1 0 1
- * 14: 1 0 1 1 0
- * 15: 1 0 1 1 1
- *
- * col: 16
- * pin: PB5
- */
- static void unselect_cols(void) {
- for (uint8_t x = 0; x < 6; x++) {
- setPinOutput(col_pins[x]);
- writePinLow(col_pins[x]);
- }
- }
-
- static void select_col(uint8_t col) {
- if (col < 16) {
- uint8_t c = col + 8;
-
- writePin(B6, c & 0b10000);
- writePin(C6, c & 0b01000);
- writePin(C7, c & 0b00100);
- writePin(F1, c & 0b00010);
- writePin(F0, c & 0b00001);
- } else {
- writePinHigh(B5);
- }
- }
-
- /* Row pin configuration
- * row: 0 1 2 3 4 5
- * pin: D0 D1 D2 D3 D5 B7
- *
- * Caps lock uses its own pin E2
- */
- static void init_pins(void) {
- unselect_cols();
- for (uint8_t x = 0; x < MATRIX_ROWS; x++) {
- setPinInputHigh(row_pins[x]);
- }
-
- setPinInputHigh(E2);
- }
-
- 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 == 3 && current_col == 0) {
- if (readPin(E2) == 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);
- }
- } else {
- if (readPin(row_pins[row_index]) == 0) {
- // Pin HI, clear col bit
- current_matrix[row_index] &= ~(ROW_SHIFTER << current_col);
- } else {
- // Pin LO, set 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 cols
- unselect_cols();
-
- return matrix_changed;
- }
-
- void matrix_init(void) {
- // initialize key pins
- init_pins();
-
- // initialize matrix state: all keys off
- for (uint8_t i = 0; i < MATRIX_ROWS; i++) {
- raw_matrix[i] = 0;
- matrix[i] = 0;
- }
-
- debounce_init(MATRIX_ROWS);
-
- matrix_init_quantum();
- }
-
- uint8_t matrix_scan(void) {
- bool changed = false;
-
- for (uint8_t current_col = 0; current_col < MATRIX_COLS; current_col++) {
- changed |= read_rows_on_col(raw_matrix, current_col);
- }
-
- debounce(raw_matrix, matrix, MATRIX_ROWS, changed);
-
- matrix_scan_quantum();
-
- return (uint8_t)changed;
- }
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