- /*
-
- Copyright 2013 Oleg Kostyuk <cub.uanic@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 "matrix.h"
- #include <stdint.h>
- #include <stdbool.h>
- #include <avr/io.h>
- #include "wait.h"
- #include "action_layer.h"
- #include "print.h"
- #include "debug.h"
- #include "util.h"
- #include "debounce.h"
- #include "gergoplex.h"
-
- #ifdef BALLER
- # include <avr/interrupt.h>
- # include "pointing_device.h"
- #endif
-
- #ifndef DEBOUNCE
- # define DEBOUNCE 5
- #endif
-
- // ATmega pin defs
- #define COL1 (1 << 6)
- #define COL2 (1 << 5)
- #define COL3 (1 << 4)
- #define COL4 (1 << 1)
-
- /* matrix state(1:on, 0:off) */
- static matrix_row_t matrix[MATRIX_ROWS];
- /*
- * matrix state(1:on, 0:off)
- * contains the raw values without debounce filtering of the last read cycle.
- */
- static matrix_row_t raw_matrix[MATRIX_ROWS];
-
- static const pin_t col_pins[MATRIX_COLS] = MATRIX_COL_PINS;
- // Right-hand side only pins, the left side is controlled my MCP
- static const pin_t row_pins[MATRIX_ROWS_PER_SIDE] = MATRIX_ROW_PINS;
-
- // Debouncing: store for each key the number of scans until it's eligible to
- // change. When scanning the matrix, ignore any changes in keys that have
- // already changed in the last DEBOUNCE scans.
-
- static matrix_row_t read_cols(uint8_t row);
- static void init_cols(void);
- static void unselect_rows(void);
- static void select_row(uint8_t row);
-
- static uint8_t mcp23018_reset_loop;
-
- __attribute__((weak)) void matrix_init_user(void) {}
- __attribute__((weak)) void matrix_scan_user(void) {}
- __attribute__((weak)) void matrix_scan_kb(void) { matrix_scan_user(); }
-
- void matrix_init(void) {
- // initialize row and col
- mcp23018_status = init_mcp23018();
- unselect_rows();
- init_cols();
-
- // initialize matrix state: all keys off
- for (uint8_t i = 0; i < MATRIX_ROWS; i++) {
- matrix[i] = 0;
- raw_matrix[i] = 0;
- }
-
- debounce_init(MATRIX_ROWS);
- matrix_init_kb();
- }
- void matrix_power_up(void) {
- mcp23018_status = init_mcp23018();
-
- unselect_rows();
- init_cols();
-
- // initialize matrix state: all keys off
- for (uint8_t i = 0; i < MATRIX_ROWS; i++) {
- matrix[i] = 0;
- }
- }
-
- // Reads and stores a row, returning
- // whether a change occurred.
- static inline bool store_raw_matrix_row(uint8_t index) {
- matrix_row_t temp = read_cols(index);
- if (raw_matrix[index] != temp) {
- raw_matrix[index] = temp;
- return true;
- }
- return false;
- }
- uint8_t matrix_scan(void) {
- if (mcp23018_status) { // if there was an error
- if (++mcp23018_reset_loop == 0) {
- // if (++mcp23018_reset_loop >= 1300) {
- // since mcp23018_reset_loop is 8 bit - we'll try to reset once in 255 matrix scans
- // this will be approx bit more frequent than once per second
- print("trying to reset mcp23018\n");
- mcp23018_status = init_mcp23018();
- if (mcp23018_status) {
- print("left side not responding\n");
- } else {
- print("left side attached\n");
- }
- }
- }
-
- bool changed = false;
- for (uint8_t i = 0; i < MATRIX_ROWS_PER_SIDE; i++) {
- // select rows from left and right hands
- uint8_t left_index = i;
- uint8_t right_index = i + MATRIX_ROWS_PER_SIDE;
- select_row(left_index);
- select_row(right_index);
-
- // we don't need a 30us delay anymore, because selecting a
- // left-hand row requires more than 30us for i2c.
-
- changed |= store_raw_matrix_row(left_index);
- changed |= store_raw_matrix_row(right_index);
-
- unselect_rows();
- }
-
- debounce(raw_matrix, matrix, MATRIX_ROWS, changed);
- matrix_scan_kb();
-
- #ifdef DEBUG_MATRIX
- for (uint8_t c = 0; c < MATRIX_COLS; c++)
- for (uint8_t r = 0; r < MATRIX_ROWS; r++)
- if (matrix_is_on(r, c)) xprintf("r:%d c:%d \n", r, c);
- #endif
-
- 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 0123456789ABCDEF\n");
- for (uint8_t row = 0; row < MATRIX_ROWS; row++) {
- print_hex8(row);
- print(": ");
- print_bin_reverse16(matrix_get_row(row));
- print("\n");
- }
- }
-
- // Remember this means ROWS
- static void init_cols(void) {
- for (uint8_t col = 0; col < MATRIX_COLS; col++) {
- gpio_set_pin_input_high(col_pins[col]);
- }
- }
-
- static matrix_row_t read_cols(uint8_t row) {
- if (row < 5) {
- if (mcp23018_status) { // if there was an error
- return 0;
- } else {
- uint8_t data = 0;
- mcp23018_status = i2c_receive(I2C_ADDR, &data, 1, I2C_TIMEOUT);
- #ifdef DEBUG_MATRIX
- if (~data != 0x00) xprintf("I2C: %d\n", ~data);
- #endif
- return ~data;
- }
- } else {
- return ~((((PINF & COL4) >> 1) | ((PINF & (COL1 | COL2 | COL3)) >> 3)) & 0xF);
- }
- }
-
- // Row pin configuration
- static void unselect_rows(void) {
- // no need to unselect on mcp23018, because the select step sets all
- // the other row bits high, and it's not changing to a different direction
-
- for (uint8_t row = 0; row < MATRIX_ROWS_PER_SIDE; row++) {
- setPinInput(row_pins[row]);
- gpio_write_pin_low(row_pins[row]);
- }
- }
-
- static void select_row(uint8_t row) {
- if (row < 5) {
- // select on mcp23018
- if (mcp23018_status) { // do nothing on error
- } else { // set active row low : 0 // set other rows hi-Z : 1
- uint8_t data;
- data = 0xFF & ~(1 << (row + 1));
- mcp23018_status = i2c_writeReg(I2C_ADDR, GPIOA, &data, 1, I2C_TIMEOUT);
-
- }
- } else {
- gpio_set_pin_output(row_pins[row - MATRIX_ROWS_PER_SIDE]);
- gpio_write_pin_low(row_pins[row - MATRIX_ROWS_PER_SIDE]);
- }
- }
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