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author | QMK Bot <hello@qmk.fm> | 2021-09-21 21:08:27 +0000 |
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committer | QMK Bot <hello@qmk.fm> | 2021-09-21 21:08:27 +0000 |
commit | e5e66b6b777941f8fb636106a282f7e659585355 (patch) | |
tree | f168dd91afe23d862e5a518b4b971f240f96234b /keyboards/gboards/gergoplex/matrix.c | |
parent | cbdaf686ffd989ec1d6c9a720ee0772c002ad181 (diff) | |
parent | 8d32ddd8e948136a992ab3c10d13c7dbf9e1e119 (diff) |
Merge remote-tracking branch 'origin/master' into develop
Diffstat (limited to 'keyboards/gboards/gergoplex/matrix.c')
-rw-r--r-- | keyboards/gboards/gergoplex/matrix.c | 241 |
1 files changed, 241 insertions, 0 deletions
diff --git a/keyboards/gboards/gergoplex/matrix.c b/keyboards/gboards/gergoplex/matrix.c new file mode 100644 index 0000000000..716390241a --- /dev/null +++ b/keyboards/gboards/gergoplex/matrix.c @@ -0,0 +1,241 @@ +/* + +Copyright 2013 Oleg Kostyuk <cub.uanic@gmail.com> + +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 "matrix.h" +#include <stdint.h> +#include <stdbool.h> +#include <avr/io.h> +#include "wait.h" +#include "action_layer.h" +#include "print.h" +#include "debug.h" +#include "util.h" +#include "debounce.h" +#include "gergoplex.h" + +#ifdef BALLER +# include <avr/interrupt.h> +# include "pointing_device.h" +#endif + +#ifndef DEBOUNCE +# define DEBOUNCE 5 +#endif + +// ATmega pin defs +#define ROW1 (1 << 6) +#define ROW2 (1 << 5) +#define ROW3 (1 << 4) +#define ROW4 (1 << 1) + +/* matrix state(1:on, 0:off) */ +static matrix_row_t matrix[MATRIX_ROWS]; +/* + * matrix state(1:on, 0:off) + * contains the raw values without debounce filtering of the last read cycle. + */ +static matrix_row_t raw_matrix[MATRIX_ROWS]; + +static const pin_t row_pins[MATRIX_COLS] = MATRIX_ROW_PINS; +// Right-hand side only pins, the left side is controlled my MCP +static const pin_t col_pins[MATRIX_ROWS_PER_SIDE] = MATRIX_COL_PINS; + +// Debouncing: store for each key the number of scans until it's eligible to +// change. When scanning the matrix, ignore any changes in keys that have +// already changed in the last DEBOUNCE scans. + +static matrix_row_t read_cols(uint8_t row); +static void init_cols(void); +static void unselect_rows(void); +static void select_row(uint8_t row); + +static uint8_t mcp23018_reset_loop; + +__attribute__((weak)) void matrix_init_user(void) {} +__attribute__((weak)) void matrix_scan_user(void) {} +__attribute__((weak)) void matrix_scan_kb(void) { matrix_scan_user(); } + +void matrix_init(void) { + // initialize row and col + mcp23018_status = init_mcp23018(); + unselect_rows(); + init_cols(); + + // initialize matrix state: all keys off + for (uint8_t i = 0; i < MATRIX_ROWS; i++) { + matrix[i] = 0; + raw_matrix[i] = 0; + } + + debounce_init(MATRIX_ROWS); + matrix_init_quantum(); +} +void matrix_power_up(void) { + mcp23018_status = init_mcp23018(); + + unselect_rows(); + init_cols(); + + // initialize matrix state: all keys off + for (uint8_t i = 0; i < MATRIX_ROWS; i++) { + matrix[i] = 0; + } +} + +// Reads and stores a row, returning +// whether a change occurred. +static inline bool store_raw_matrix_row(uint8_t index) { + matrix_row_t temp = read_cols(index); + if (raw_matrix[index] != temp) { + raw_matrix[index] = temp; + return true; + } + return false; +} +uint8_t matrix_scan(void) { + if (mcp23018_status) { // if there was an error + if (++mcp23018_reset_loop == 0) { + // if (++mcp23018_reset_loop >= 1300) { + // since mcp23018_reset_loop is 8 bit - we'll try to reset once in 255 matrix scans + // this will be approx bit more frequent than once per second + print("trying to reset mcp23018\n"); + mcp23018_status = init_mcp23018(); + if (mcp23018_status) { + print("left side not responding\n"); + } else { + print("left side attached\n"); + } + } + } + + bool changed = false; + for (uint8_t i = 0; i < MATRIX_ROWS_PER_SIDE; i++) { + // select rows from left and right hands + uint8_t left_index = i; + uint8_t right_index = i + MATRIX_ROWS_PER_SIDE; + select_row(left_index); + select_row(right_index); + + // we don't need a 30us delay anymore, because selecting a + // left-hand row requires more than 30us for i2c. + + changed |= store_raw_matrix_row(left_index); + changed |= store_raw_matrix_row(right_index); + + unselect_rows(); + } + + debounce(raw_matrix, matrix, MATRIX_ROWS, changed); + matrix_scan_quantum(); + +#ifdef DEBUG_MATRIX + for (uint8_t c = 0; c < MATRIX_COLS; c++) + for (uint8_t r = 0; r < MATRIX_ROWS; r++) + if (matrix_is_on(r, c)) xprintf("r:%d c:%d \n", r, c); +#endif + + return 1; +} + +bool matrix_is_modified(void) // deprecated and evidently not called. +{ + return true; +} + +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("\nr/c 0123456789ABCDEF\n"); + for (uint8_t row = 0; row < MATRIX_ROWS; row++) { + print_hex8(row); + print(": "); + print_bin_reverse16(matrix_get_row(row)); + print("\n"); + } +} +uint8_t matrix_key_count(void) { + uint8_t count = 0; + for (uint8_t i = 0; i < MATRIX_ROWS; i++) { + count += bitpop16(matrix[i]); + } + return count; +} + +// Remember this means ROWS +static void init_cols(void) { + for (uint8_t row = 0; row < MATRIX_COLS; row++) { + setPinInputHigh(row_pins[row]); + } +} + +static matrix_row_t read_cols(uint8_t row) { + if (row < 5) { + if (mcp23018_status) { // if there was an error + return 0; + } else { + uint8_t data = 0; + mcp23018_status = i2c_start(I2C_ADDR_READ, I2C_TIMEOUT); + if (mcp23018_status) goto out; + mcp23018_status = i2c_read_nack(I2C_TIMEOUT); + if (mcp23018_status < 0) goto out; + data = ~((uint8_t)mcp23018_status); + mcp23018_status = I2C_STATUS_SUCCESS; + out: + i2c_stop(); + +#ifdef DEBUG_MATRIX + if (data != 0x00) xprintf("I2C: %d\n", data); +#endif + return data; + } + } else { + return ~((((PINF & ROW4) >> 1) | ((PINF & (ROW1 | ROW2 | ROW3)) >> 3)) & 0xF); + } +} + +// Row pin configuration +static void unselect_rows(void) { + // no need to unselect on mcp23018, because the select step sets all + // the other row bits high, and it's not changing to a different direction + + for (uint8_t col = 0; col < MATRIX_ROWS_PER_SIDE; col++) { + setPinInput(col_pins[col]); + writePinLow(col_pins[col]); + } +} + +static void select_row(uint8_t row) { + if (row < 5) { + // select on mcp23018 + if (mcp23018_status) { // do nothing on error + } else { // set active row low : 0 // set other rows hi-Z : 1 + mcp23018_status = i2c_start(I2C_ADDR_WRITE, I2C_TIMEOUT); + if (mcp23018_status) goto out; + mcp23018_status = i2c_write(GPIOA, I2C_TIMEOUT); + if (mcp23018_status) goto out; + mcp23018_status = i2c_write(0xFF & ~(1 << (row + 1)), I2C_TIMEOUT); + if (mcp23018_status) goto out; + out: + i2c_stop(); + } + } else { + setPinOutput(col_pins[row - MATRIX_ROWS_PER_SIDE]); + writePinLow(col_pins[row - MATRIX_ROWS_PER_SIDE]); + } +} |