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Diffstat (limited to 'keyboards/om60/matrix.c')
| -rw-r--r-- | keyboards/om60/matrix.c | 166 |
1 files changed, 166 insertions, 0 deletions
diff --git a/keyboards/om60/matrix.c b/keyboards/om60/matrix.c new file mode 100644 index 0000000000..3686780468 --- /dev/null +++ b/keyboards/om60/matrix.c @@ -0,0 +1,166 @@ +/* +Copyright 2012-2018 Jun Wako, Jack Humbert, Yiancar +Copyright 2022 jun10000 + +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 "quantum.h" + +#if (MATRIX_COLS <= 8) +# define ROW_SHIFTER ((uint8_t)1) +#elif (MATRIX_COLS <= 16) +# define ROW_SHIFTER ((uint16_t)1) +#elif (MATRIX_COLS <= 32) +# 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; + +static void select_row(uint8_t row) +{ + setPinOutput(row_pins[row]); + writePinLow(row_pins[row]); +} + +static void unselect_row(uint8_t row) +{ + setPinInputHigh(row_pins[row]); +} + +static void unselect_rows(void) +{ + for(uint8_t x = 0; x < MATRIX_ROWS; x++) { + setPinInputHigh(row_pins[x]); + } +} + +static void select_col(uint8_t col) +{ + setPinOutput(col_pins[col]); + writePinLow(col_pins[col]); +} + +static void unselect_col(uint8_t col) +{ + setPinInputHigh(col_pins[col]); +} + +static void unselect_cols(void) +{ + for(uint8_t x = 0; x < MATRIX_COLS; x++) { + setPinInputHigh(col_pins[x]); + } +} + +static void init_pins(void) { + unselect_rows(); + unselect_cols(); + for (uint8_t x = 0; x < MATRIX_COLS; x++) { + setPinInputHigh(col_pins[x]); + } + for (uint8_t x = 0; x < MATRIX_ROWS; x++) { + setPinInputHigh(row_pins[x]); + } +} + +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); + + // For each col... + for(uint8_t col_index = 0; col_index < MATRIX_COLS; col_index++) { + + // Select the col pin to read (active low) + uint8_t pin_state = readPin(col_pins[col_index]); + + // Populate the matrix row with the state of the col pin + current_matrix[current_row] |= pin_state ? 0 : (ROW_SHIFTER << col_index); + } + + // Unselect row + unselect_row(current_row); + + return (last_row_value != current_matrix[current_row]); +} + +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/2; row_index++) + { + uint8_t tmp = row_index + MATRIX_ROWS/2; + // Store last value of row prior to reading + matrix_row_t last_row_value = current_matrix[tmp]; + + // Check row pin state + if (readPin(row_pins[row_index]) == 0) + { + // Pin LO, set col bit + current_matrix[tmp] |= (ROW_SHIFTER << current_col); + } + else + { + // Pin HI, clear col bit + current_matrix[tmp] &= ~(ROW_SHIFTER << current_col); + } + + // Determine if the matrix changed state + if ((last_row_value != current_matrix[tmp]) && !(matrix_changed)) + { + matrix_changed = true; + } + } + + // Unselect col + unselect_col(current_col); + + return matrix_changed; +} + +void matrix_init_custom(void) { + // initialize key pins + init_pins(); +} + +bool matrix_scan_custom(matrix_row_t current_matrix[]) +{ + bool changed = false; + + // Set row, read cols + for (uint8_t current_row = 0; current_row < MATRIX_ROWS / 2; current_row++) { + changed |= read_cols_on_row(current_matrix, current_row); + } + //else + // Set col, read rows + for (uint8_t current_col = 0; current_col < MATRIX_COLS; current_col++) { + changed |= read_rows_on_col(current_matrix, current_col); + } + + return (uint8_t)changed; +} |