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Diffstat (limited to 'keyboards/kbdmania/kmac/matrix.c')
| -rw-r--r-- | keyboards/kbdmania/kmac/matrix.c | 205 |
1 files changed, 205 insertions, 0 deletions
diff --git a/keyboards/kbdmania/kmac/matrix.c b/keyboards/kbdmania/kmac/matrix.c new file mode 100644 index 0000000000..6569867032 --- /dev/null +++ b/keyboards/kbdmania/kmac/matrix.c @@ -0,0 +1,205 @@ +/* +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 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 + +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_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"); + } +} + +/* 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_kb(); +} + +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_kb(); + + return (uint8_t)changed; +} |