diff options
author | Nick Brassel <nick@tzarc.org> | 2021-08-29 08:20:25 +1000 |
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committer | Nick Brassel <nick@tzarc.org> | 2021-08-29 08:20:25 +1000 |
commit | f061ca497464fe85284906fb163a33eaee7a91ef (patch) | |
tree | 33ef1bfb529aed382e8526c607c4e18717f92571 /keyboards/xiudi/xd96/matrix.c | |
parent | ff65185dec6f97be1eb49f17cea526a0d0bbf3d6 (diff) | |
parent | 4bad375d7c09d949a9dcdd4feba147c9c7a67ec6 (diff) |
Breaking changes develop merge to master, 2021Q3 edition. (#14196)
Diffstat (limited to 'keyboards/xiudi/xd96/matrix.c')
-rw-r--r-- | keyboards/xiudi/xd96/matrix.c | 96 |
1 files changed, 96 insertions, 0 deletions
diff --git a/keyboards/xiudi/xd96/matrix.c b/keyboards/xiudi/xd96/matrix.c new file mode 100644 index 0000000000..8cecc79c26 --- /dev/null +++ b/keyboards/xiudi/xd96/matrix.c @@ -0,0 +1,96 @@ +/* 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 + pca9555_set_config(IC1, 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 +} + +static void select_row(uint8_t row) { + // For the XD96 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; + + pca9555_set_output(IC1, PCA9555_PORT0, ALL_HIGH & (~mask)); + pca9555_set_config(IC1, PCA9555_PORT0, ALL_INPUT & (~mask)); +} + +static uint32_t read_cols(void) { + uint32_t state_1 = pca9555_readPins(IC2, PCA9555_PORT0); + uint32_t state_2 = pca9555_readPins(IC2, PCA9555_PORT1); + uint32_t state_3 = pca9555_readPins(IC1, PCA9555_PORT1); + + // For the XD96 the pins are mapped to port expanders as follows: + // all 8 pins port 0 IC2, first 6 pins port 1 IC2, first 4 pins port 1 IC1 + uint32_t state = (((state_3 & 0b00001111) << 14) | ((state_2 & 0b00111111) << 8) | state_1); + return (~state) & 0b111111111111111111; +} + +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); + wait_us(30); + + 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; +}
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