diff options
Diffstat (limited to 'keyboards/ryanskidmore/rskeys100/matrix.c')
| -rw-r--r-- | keyboards/ryanskidmore/rskeys100/matrix.c | 110 |
1 files changed, 110 insertions, 0 deletions
diff --git a/keyboards/ryanskidmore/rskeys100/matrix.c b/keyboards/ryanskidmore/rskeys100/matrix.c new file mode 100644 index 0000000000..faefb29c84 --- /dev/null +++ b/keyboards/ryanskidmore/rskeys100/matrix.c @@ -0,0 +1,110 @@ +/* +Copyright 2014 Ralf Schmitt <ralf@bunkertor.net> +Modified by Ryan Skidmore <rskeys@ryanskidmore.co.uk> (@ryanskidmore) +to support the rskeys100. + +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 <stdbool.h> +#include "matrix.h" +#include <util/delay.h> +#include "quantum.h" + +static const uint32_t col_values[24] = SHR_COLS; + +static uint8_t read_rows(void); +static void select_col(uint8_t col); + +static void shift_pulse(void); +static void shift_out_single(uint8_t value); +static void shift_out(uint32_t value); + +void matrix_init_custom(void) { + setPinInput(ROW_A); + setPinInput(ROW_B); + setPinInput(ROW_C); + setPinInput(ROW_D); + setPinInput(ROW_E); + setPinInput(ROW_F); + + setPinOutput(SHR_DATA); + setPinOutput(SHR_LATCH); + setPinOutput(SHR_CLOCK); +} + +bool matrix_scan_custom(matrix_row_t current_matrix[]) { + bool changed = false; + + for (uint8_t col = 0; col < MATRIX_COLS; col++) { + select_col(col); + _delay_us(1); + uint8_t rows = read_rows(); + for (uint8_t row = 0; row < MATRIX_ROWS; row++) { + bool prev_bit = ((uint32_t)(current_matrix[row]) & (matrix_row_t)(1UL << col)) ? 1 : 0; + bool curr_bit = ((uint32_t)rows & (uint32_t)(1UL << row)) ? 1 : 0; + if (prev_bit != curr_bit) { + current_matrix[row] = (uint32_t)(current_matrix[row]) ^ (uint32_t)(1UL << col); + changed = true; + } + } + } + + return changed; +} + +static uint8_t read_rows(void) { + return (readPin(ROW_F) << 5) + | (readPin(ROW_E) << 4) + | (readPin(ROW_D) << 3) + | (readPin(ROW_C) << 2) + | (readPin(ROW_B) << 1) + | (readPin(ROW_A) ); +} + +static void select_col(uint8_t col) { + shift_out(col_values[col]); +} + +static void shift_out(uint32_t value) { + writePinLow(SHR_LATCH); + uint8_t first_byte = (value >> 16) & 0xFF; + uint8_t second_byte = (value >> 8) & 0xFF; + uint8_t third_byte = (uint8_t)(value & 0xFF); + + shift_out_single(first_byte); + shift_out_single(second_byte); + shift_out_single(third_byte); + writePinHigh(SHR_LATCH); + /* We delay here to prevent multiple consecutive keys being triggered with a single switch press */ + _delay_us(10); +} + +static void shift_out_single(uint8_t value) { + for (uint8_t i = 0; i < 8; i++) { + if (value & 0b10000000) { + writePinHigh(SHR_DATA); + } else { + writePinLow(SHR_DATA); + } + + shift_pulse(); + value = value << 1; + } +} + +static inline void shift_pulse(void) { + writePinHigh(SHR_CLOCK); + writePinLow(SHR_CLOCK); +}
\ No newline at end of file |