From e1437c1859b088c4da7ffb517f8034723172cd82 Mon Sep 17 00:00:00 2001 From: Richard Titmuss Date: Sun, 20 Sep 2020 02:48:43 +0200 Subject: [Keyboard] Add Torn keyboard (#10207) * Add Torn keyboard * Apply suggestions from code review Co-authored-by: Nick Brassel * Remove via json file * Add mcp23081_pin_t * Apply suggestions from code review Co-authored-by: James Young <18669334+noroadsleft@users.noreply.github.com> * Apply suggestions from code review Co-authored-by: James Young <18669334+noroadsleft@users.noreply.github.com> * Apply suggestions from code review Co-authored-by: Drashna Jaelre * Apply suggestions from code review Co-authored-by: Ryan Co-authored-by: Richard Titmuss Co-authored-by: Nick Brassel Co-authored-by: James Young <18669334+noroadsleft@users.noreply.github.com> Co-authored-by: Drashna Jaelre Co-authored-by: Ryan --- keyboards/torn/matrix.c | 113 ++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 113 insertions(+) create mode 100644 keyboards/torn/matrix.c (limited to 'keyboards/torn/matrix.c') diff --git a/keyboards/torn/matrix.c b/keyboards/torn/matrix.c new file mode 100644 index 000000000..dd7fa1e2e --- /dev/null +++ b/keyboards/torn/matrix.c @@ -0,0 +1,113 @@ +/* + * Copyright 2020 Richard Titmuss (richard.titmuss@gmail.com) + * Copyright 2012-2018 Jun Wako, Jack Humbert, Yiancar + * + * 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 . + */ + +#include QMK_KEYBOARD_H +#include "mcp23018.h" + +#define SPLIT_MATRIX_COLS (MATRIX_COLS / 2) +#define SECONDARY_ROW_OFFSET (MATRIX_ROWS / 2) + +typedef uint16_t mcp23018_pin_t; + +static const pin_t row_pins[MATRIX_ROWS] = MATRIX_ROW_PINS; +static const pin_t col_pins[SPLIT_MATRIX_COLS] = MATRIX_COL_PINS; +static const mcp23018_pin_t secondary_row_pins[MATRIX_ROWS] = SECONDARY_ROW_PINS; +static const mcp23018_pin_t secondary_col_pins[SPLIT_MATRIX_COLS] = SECONDARY_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_secondary_row(uint8_t row) { + uint8_t gpioa = 0xFF & ~secondary_row_pins[row]; + mcp23018_writeReg(GPIOA, &gpioa, 1); +} + +static void init_pins(void) { + unselect_rows(); + for (uint8_t x = 0; x < SPLIT_MATRIX_COLS; x++) { + setPinInputHigh(col_pins[x]); + } +} + +static matrix_row_t read_cols(void) { + matrix_row_t state = 0; + + // For each col... + for (uint8_t col_index = 0; col_index < SPLIT_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 + state |= pin_state ? 0 : (MATRIX_ROW_SHIFTER << col_index); + } + + return state; +} + +static matrix_row_t read_secondary_cols(void) { + matrix_row_t state = 0; + + uint8_t mcp23018_pin_state[2]; + if (mcp23018_readReg(GPIOA, mcp23018_pin_state, 2)) { + return 0; + } + + uint16_t pins = mcp23018_pin_state[0] | (mcp23018_pin_state[1] << 8); + + for (uint8_t col_index = 0; col_index < SPLIT_MATRIX_COLS; col_index++) { + uint16_t pin_state = pins & (secondary_col_pins[col_index]); + state |= pin_state ? 0 : (MATRIX_ROW_SHIFTER << col_index); + } + + return state; +} + +static bool read_cols_on_row(matrix_row_t current_matrix[], uint8_t current_row) { + matrix_row_t last_row_value = current_matrix[current_row]; + + select_row(current_row); + select_secondary_row(current_row); + + current_matrix[current_row] = read_cols() | (read_secondary_cols() << 6); + + unselect_row(current_row); + + return (last_row_value != current_matrix[current_row]); +} + +void matrix_init_custom(void) { 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; +} -- cgit v1.2.3