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author | peepeetee <43021794+peepeetee@users.noreply.github.com> | 2021-08-21 22:53:49 -0500 |
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committer | GitHub <noreply@github.com> | 2021-08-22 13:53:49 +1000 |
commit | 78ccd9c201199444bc06161b05ee8d7ba9c31613 (patch) | |
tree | 726d9e55d8cde510fe72bc1fb9bb2a7dabdbecc2 /keyboards/xiudi/xd84/matrix.c | |
parent | c70abc8d047319830e369ae4e14cd43bae3bd3b8 (diff) |
Organize KPrepublic, K.T.E.C, xiudi boards into directories (#12159)
* reset; redoing my steps; and recommit
* include xd002/.noci
Diffstat (limited to 'keyboards/xiudi/xd84/matrix.c')
-rw-r--r-- | keyboards/xiudi/xd84/matrix.c | 98 |
1 files changed, 98 insertions, 0 deletions
diff --git a/keyboards/xiudi/xd84/matrix.c b/keyboards/xiudi/xd84/matrix.c new file mode 100644 index 0000000000..92b8ff8546 --- /dev/null +++ b/keyboards/xiudi/xd84/matrix.c @@ -0,0 +1,98 @@ +/* Copyright 2019 + * + * 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 <avr/io.h> +#include <string.h> +#include "matrix.h" +#include "pca9555.h" +#include "quantum.h" + +#include "debug.h" + +// PCA9555 slave addresses +#define IC1 0x20 +#define IC2 0x21 + +//_____Utility funcs___________________________________________________________ + +static void init_pins(void) { + // init all cols high - IC2 all input + pca9555_set_config(IC2, PCA9555_PORT0, ALL_INPUT); // same as initial state + pca9555_set_config(IC2, PCA9555_PORT1, ALL_INPUT); // same as initial state + + // init all rows - IC1 port0 input + pca9555_set_config(IC1, PCA9555_PORT0, ALL_INPUT); // same as initial state + pca9555_set_output(IC1, PCA9555_PORT0, ALL_LOW); +} + +static void select_row(uint8_t row) { + // For the XD84 all rows are on the same IC and port + // so its safe enough to assume here row == pin + uint8_t pin = row; + uint8_t mask = 1 << pin; + + // we configure output once in init, as pca9555 remembers state when flipping between input/output + // pca9555_set_output(IC1, PCA9555_PORT0, ALL_HIGH & (~mask)); + pca9555_set_config(IC1, PCA9555_PORT0, ALL_INPUT & (~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 = pca9555_readAllPins(IC2); + + // For the XD84 all cols are on the same IC and mapped sequentially + // while this technically gives 16 column reads, + // the 16th column can never be set so is safely ignored + // return ~((state_2 << 8) | state_1); + return ~state; +} + +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 selection to stabilize + select_row(current_row); + // Skip the wait_us(30); as i2c is slow enough to debounce the io changes + + current_matrix[current_row] = read_cols(); + + // No need to Unselect row as the next `select_row` will blank everything + + return (last_row_value != current_matrix[current_row]); +} + +//_____CUSTOM MATRIX IMPLEMENTATION____________________________________________________ + +void matrix_init_custom(void) { + pca9555_init(IC1); + pca9555_init(IC2); + + init_pins(); +} + +bool matrix_scan_custom(matrix_row_t current_matrix[]) { + bool changed = false; + for (uint8_t current_row = 0; current_row < MATRIX_ROWS; current_row++) { + changed |= read_cols_on_row(current_matrix, current_row); + } + return changed; +} |