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Diffstat (limited to 'keyboards/moon/matrix.c')
| -rw-r--r-- | keyboards/moon/matrix.c | 218 |
1 files changed, 218 insertions, 0 deletions
diff --git a/keyboards/moon/matrix.c b/keyboards/moon/matrix.c new file mode 100644 index 000000000..c74c70f89 --- /dev/null +++ b/keyboards/moon/matrix.c @@ -0,0 +1,218 @@ +/* +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 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 + +/* 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++) { + phex(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_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) { + uint16_t state_1 = pca9555_readPins(IC2, PCA9555_PORT0); + uint16_t state_2 = pca9555_readPins(IC2, PCA9555_PORT1); + + uint16_t state = ((state_1 & PORT0_COLS_MASK) << 3) | ((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; +} |