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Diffstat (limited to 'keyboards/gingham/matrix.c')
| -rw-r--r-- | keyboards/gingham/matrix.c | 247 |
1 files changed, 247 insertions, 0 deletions
diff --git a/keyboards/gingham/matrix.c b/keyboards/gingham/matrix.c new file mode 100644 index 0000000000..790ba9c287 --- /dev/null +++ b/keyboards/gingham/matrix.c @@ -0,0 +1,247 @@ +/* +Copyright 2012-2019 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 <http://www.gnu.org/licenses/>. +*/ +#include <stdint.h> +#include <stdbool.h> +#include "wait.h" +#include "print.h" +#include "debug.h" +#include "util.h" +#include "matrix.h" +#include "debounce.h" +#include "quantum.h" +#include "i2c_master.h" + +#if (MATRIX_COLS <= 8) +# define print_matrix_header() print("\nr/c 01234567\n") +# define print_matrix_row(row) print_bin_reverse8(matrix_get_row(row)) +# define matrix_bitpop(i) bitpop(matrix[i]) +# define ROW_SHIFTER ((uint8_t)1) +#elif (MATRIX_COLS <= 16) +# define print_matrix_header() print("\nr/c 0123456789ABCDEF\n") +# define print_matrix_row(row) print_bin_reverse16(matrix_get_row(row)) +# define matrix_bitpop(i) bitpop16(matrix[i]) +# define ROW_SHIFTER ((uint16_t)1) +#elif (MATRIX_COLS <= 32) +# define print_matrix_header() print("\nr/c 0123456789ABCDEF0123456789ABCDEF\n") +# define print_matrix_row(row) print_bin_reverse32(matrix_get_row(row)) +# define matrix_bitpop(i) bitpop32(matrix[i]) +# define ROW_SHIFTER ((uint32_t)1) +#endif + +#ifdef MATRIX_MASKED + extern const matrix_row_t matrix_mask[]; +#endif + +static const pin_t row_pins[MATRIX_ROWS] = MATRIX_ROW_PINS; +static const pin_t col_pins[MATRIX_COLS] = MATRIX_COL_PINS; + +/* matrix state(1:on, 0:off) */ +static matrix_row_t raw_matrix[MATRIX_ROWS]; //raw values +static matrix_row_t matrix[MATRIX_ROWS]; //debounced values + +__attribute__ ((weak)) +void matrix_init_quantum(void) { + matrix_init_kb(); +} + +__attribute__ ((weak)) +void matrix_scan_quantum(void) { + matrix_scan_kb(); +} + +__attribute__ ((weak)) +void matrix_init_kb(void) { + matrix_init_user(); +} + +__attribute__ ((weak)) +void matrix_scan_kb(void) { + matrix_scan_user(); +} + +__attribute__ ((weak)) +void matrix_init_user(void) { +} + +__attribute__ ((weak)) +void matrix_scan_user(void) { +} + +inline +uint8_t matrix_rows(void) { + return MATRIX_ROWS; +} + +inline +uint8_t matrix_cols(void) { + return MATRIX_COLS; +} + +//Deprecated. +bool matrix_is_modified(void) +{ + if (debounce_active()) return false; + 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) +{ + // Matrix mask lets you disable switches in the returned matrix data. For example, if you have a + // switch blocker installed and the switch is always pressed. +#ifdef MATRIX_MASKED + return matrix[row] & matrix_mask[row]; +#else + return matrix[row]; +#endif +} + +void matrix_print(void) +{ + print_matrix_header(); + + for (uint8_t row = 0; row < MATRIX_ROWS; row++) { + phex(row); print(": "); + print_matrix_row(row); + print("\n"); + } +} + +uint8_t matrix_key_count(void) +{ + uint8_t count = 0; + for (uint8_t i = 0; i < MATRIX_ROWS; i++) { + count += matrix_bitpop(i); + } + return count; +} + +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++) { + setPinInput(row_pins[x]); + } +} + +static void init_pins(void) { + unselect_rows(); + // Set I/O + uint8_t send_data = 0x07; + i2c_writeReg((PORT_EXPANDER_ADDRESS << 1), 0x00, &send_data, 1, 20); + // // Set Pull-up + i2c_writeReg((PORT_EXPANDER_ADDRESS << 1), 0x06, &send_data, 1, 20); + + for (uint8_t x = 0; x < MATRIX_COLS; x++) { + if ( (x > 0) && (x < 12) ) { + setPinInputHigh(col_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++) { + uint8_t pin_state; + // Select the col pin to read (active low) + switch (col_index) { + case 0 : + i2c_readReg((PORT_EXPANDER_ADDRESS << 1), 0x09, &pin_state, 1, 20); + pin_state = pin_state & 0x01; + break; + case 12 : + i2c_readReg((PORT_EXPANDER_ADDRESS << 1), 0x09, &pin_state, 1, 20); + pin_state = pin_state & (1 << 2); + break; + case 13 : + i2c_readReg((PORT_EXPANDER_ADDRESS << 1), 0x09, &pin_state, 1, 20); + pin_state = pin_state & (1 << 1); + break; + default : + 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]); +} + +void matrix_init(void) { + + // Initialize I2C + i2c_init(); + + // initialize key pins + init_pins(); + + // initialize matrix state: all keys off + for (uint8_t i=0; i < MATRIX_ROWS; i++) { + raw_matrix[i] = 0; + matrix[i] = 0; + } + + debounce_init(MATRIX_ROWS); + + matrix_init_quantum(); +} + +uint8_t matrix_scan(void) +{ + bool changed = false; + + // Set row, read cols + for (uint8_t current_row = 0; current_row < MATRIX_ROWS; current_row++) { + changed |= read_cols_on_row(raw_matrix, current_row); + } + + debounce(raw_matrix, matrix, MATRIX_ROWS, changed); + + matrix_scan_quantum(); + return (uint8_t)changed; +} |