- /*
- Copyright 2012-2017 Jun Wako, Jack Humbert
-
- 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"
- #include "sx60.h"
-
-
- /* Set 0 if debouncing isn't needed */
-
- #ifndef DEBOUNCE
- # define DEBOUNCE 5
- #endif
-
- #if (DEBOUNCE > 0)
- static uint16_t debouncing_time;
- static bool debouncing = false;
- #endif
-
- #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
-
- #ifdef MATRIX_MASKED
- extern const matrix_row_t matrix_mask[];
- #endif
-
- static const uint8_t col_pins[ATMEGA_COLS] = MATRIX_COL_PINS;
- 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 uint8_t mcp23018_reset_loop;
-
-
- static void init_cols(void);
- static bool read_cols_on_row(matrix_row_t current_matrix[], uint8_t current_row);
- static void unselect_rows(void);
- static void select_row(uint8_t row);
-
- __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;
- }
-
- void matrix_init(void) {
- mcp23018_status = true;
-
- /* initialize row and col */
- unselect_rows();
- init_cols();
-
- /* 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)
- {
- if (mcp23018_status) {
- /* if there was an error */
- if (++mcp23018_reset_loop == 0) {
- /* 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");
- }
- }
- }
-
- /* Set row, read cols */
- for (uint8_t current_row = 0; current_row < MATRIX_ROWS; current_row++) {
- # if (DEBOUNCE > 0)
- bool matrix_changed = read_cols_on_row(matrix_debouncing, current_row);
-
- if (matrix_changed) {
- debouncing = true;
- debouncing_time = timer_read();
- }
- # else
- read_cols_on_row(matrix, current_row);
- # endif
- }
-
- # if (DEBOUNCE > 0)
- if (debouncing && (timer_elapsed(debouncing_time) > DEBOUNCE)) {
- for (uint8_t i = 0; i < MATRIX_ROWS; i++) {
- matrix[i] = matrix_debouncing[i];
- }
- debouncing = false;
- }
- # endif
-
- matrix_scan_quantum();
- return 1;
- }
-
- bool matrix_is_modified(void)
- {
- #if (DEBOUNCE > 0)
- if (debouncing) return false;
- #endif
- return true;
- }
-
- 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)
- {
- /* Matrix mask lets you disable switches in the returned matrix data. For example, if you have a
- switch blocker installed and the switch is always pressed. */
- #ifdef MATRIX_MASKED
- return matrix[row] & matrix_mask[row];
- #else
- return matrix[row];
- #endif
- }
-
- 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;
- }
-
- static void init_cols(void)
- {
- for(uint8_t x = 0; x < ATMEGA_COLS; x++) {
- uint8_t pin = col_pins[x];
- _SFR_IO8((pin >> 4) + 1) &= ~_BV(pin & 0xF); /* IN */
- _SFR_IO8((pin >> 4) + 2) |= _BV(pin & 0xF); /* HI */
- }
- }
-
- static bool read_cols_on_row(matrix_row_t current_matrix[], uint8_t current_row)
- {
- /* Store last value of row prior to reading */
- matrix_row_t last_row_value = current_matrix[current_row];
-
- /* Clear data in matrix row */
- current_matrix[current_row] = 0;
-
- /* Select row and wait for row selecton to stabilize */
- select_row(current_row);
- wait_us(30);
-
- if (mcp23018_status) {
- /* if there was an error */
- return 0;
- } else {
- uint16_t data = 0;
- mcp23018_status = i2c_start(I2C_ADDR_WRITE); if (mcp23018_status) goto out;
- mcp23018_status = i2c_write(GPIOA); if (mcp23018_status) goto out;
- mcp23018_status = i2c_start(I2C_ADDR_READ); if (mcp23018_status) goto out;
- data = i2c_readNak();
- data = ~data;
- out:
- i2c_stop();
- current_matrix[current_row] |= (data << 8);
- }
-
- /* For each col... */
- for(uint8_t col_index = 0; col_index < ATMEGA_COLS; col_index++) {
- /* Select the col pin to read (active low) */
- uint8_t pin = col_pins[col_index];
- uint8_t pin_state = (_SFR_IO8(pin >> 4) & _BV(pin & 0xF));
-
- /* Populate the matrix row with the state of the col pin */
- current_matrix[current_row] |= pin_state ? 0 : (ROW_SHIFTER << col_index);
- }
-
- /* Unselect row */
- unselect_rows();
-
- return (last_row_value != current_matrix[current_row]);
- }
-
- static void select_row(uint8_t row)
- {
- if (mcp23018_status) {
- /* if there was an error do nothing */
- } else {
- /* set active row low : 0
- set active row output : 1
- set other rows hi-Z : 1 */
- mcp23018_status = i2c_start(I2C_ADDR_WRITE); if (mcp23018_status) goto out;
- mcp23018_status = i2c_write(GPIOB); if (mcp23018_status) goto out;
- mcp23018_status = i2c_write(0xFF & ~(1<<abs(row-4))); if (mcp23018_status) goto out;
- out:
- i2c_stop();
- }
-
- uint8_t pin = row_pins[row];
- _SFR_IO8((pin >> 4) + 1) |= _BV(pin & 0xF); /* OUT */
- _SFR_IO8((pin >> 4) + 2) &= ~_BV(pin & 0xF); /* LOW */
- }
-
- static void unselect_rows(void)
- {
- for(uint8_t x = 0; x < MATRIX_ROWS; x++) {
- uint8_t pin = row_pins[x];
- _SFR_IO8((pin >> 4) + 1) &= ~_BV(pin & 0xF); /* IN */
- _SFR_IO8((pin >> 4) + 2) |= _BV(pin & 0xF); /* HI */
- }
- }
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