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- /*
- Copyright 2012-2019 Jun Wako, Jack Humbert, Yiancar, 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"
- #include "pca9555.h"
-
- /*
- * IC1 (PCA9555) IC2 (PCA9555)
- * ,----------. ,----------.
- * SDA --| SDA P00 |-- P1 SDA --| SDA P00 |-- P17
- * SCL --| SCL P01 |-- P2 SCL --| SCL P01 |-- P18
- * INT --| INT P02 |-- P3 INT --| INT P02 |-- P19
- * | P03 |-- P4 | P03 |-- P20
- * GND --| A0 P04 |-- P5 VCC --| A0 P04 |-- P21
- * SJ1 --| A1 P05 |-- P6 SJ1 --| A1 P05 |-- P22
- * GND --| A2 P06 |-- P7 GND --| A2 P06 |-- P23
- * | P07 |-- P8 | P07 |-- P24
- * | | | |
- * | P10 |-- P9 | P10 |-- P25
- * | P11 |-- P10 | P11 |-- P26
- * | P12 |-- P11 | P12 |-- P27
- * | P13 |-- P12 | P13 |-- P28
- * | P14 |-- P13 | P14 |-- P29
- * | P15 |-- P14 | P15 |-- P30
- * | P16 |-- P15 | P16 |-- P31
- * | P17 |-- P16 | P17 |-- P32
- * `----------' `----------'
- */
-
- /*
- * | Row | Pin | | Col | Pin |
- * | --- | --- | | --- | --- |
- * | 0 | P1 | | 0 | P25 |
- * | 1 | P2 | | 1 | P26 |
- * | 2 | P3 | | 2 | P27 |
- * | 3 | P4 | | 3 | P28 |
- * | 4 | P5 | | 4 | P29 |
- * | 5 | P6 | | 5 | P30 |
- * | 6 | P7 | | 6 | P20 |
- * | 7 | P8 | | 7 | P21 |
- * | 8 | P22 |
- * | 9 | P23 |
- * | A | P24 |
- */
-
- // PCA9555 slave addresses
- #define IC1 0x20
- #define IC2 0x21
-
- // PCA9555 column pin masks
- #define PORT0_COLS_MASK 0b11111000
- #define PORT1_COLS_MASK 0b00111111
- #define COLS_MASK 0b0000011111111111
-
- #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 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 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 ROW_SHIFTER ((uint32_t)1)
- #endif
-
- /* 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");
- }
- }
-
- static void init_i2c(void) {
- pca9555_init(IC1);
- pca9555_init(IC2);
- }
-
- static void init_pins(void) {
- // init cols - IC2 port0 & IC2 port1 input
- pca9555_set_config(IC2, PCA9555_PORT0, ALL_INPUT);
- pca9555_set_config(IC2, PCA9555_PORT1, ALL_INPUT);
-
- // init rows - IC1 port0 output
- pca9555_set_config(IC1, PCA9555_PORT0, ALL_OUTPUT);
- pca9555_set_output(IC1, PCA9555_PORT0, ALL_HIGH);
- }
-
- static void select_row(uint8_t row) {
- // All rows are on the same IC and port
- uint8_t mask = 1 << row;
-
- // set active row low : 0
- // set other rows hi-Z : 1
- pca9555_set_output(IC1, PCA9555_PORT0, ALL_HIGH & (~mask));
- }
-
- static uint16_t read_cols(void) {
- uint8_t state_1 = 0;
- uint8_t state_2 = 0;
- pca9555_readPins(IC2, PCA9555_PORT0, &state_1);
- pca9555_readPins(IC2, PCA9555_PORT1, &state_2);
-
- uint16_t state = (((uint16_t)state_1 & PORT0_COLS_MASK) << 3) | (((uint16_t)state_2 & PORT1_COLS_MASK));
-
- // A low pin indicates an active column
- return (~state) & COLS_MASK;
- }
-
- 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);
-
- current_matrix[current_row] |= read_cols();
-
- // No need to unselect as `select_row` sets all the pins.
-
- return (last_row_value != current_matrix[current_row]);
- }
-
- void matrix_init(void) {
- // initialize i2c
- init_i2c();
-
- // 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_row = 0; current_row < MATRIX_ROWS; current_row++) {
- changed |= read_cols_on_row(raw_matrix, current_row);
- }
-
- debounce(raw_matrix, matrix, MATRIX_ROWS, changed);
-
- matrix_scan_quantum();
-
- return (uint8_t)changed;
- }
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