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@@ -0,0 +1,527 @@
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+/*
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+Copyright 2013 Oleg Kostyuk <cub.uanic@gmail.com>
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+Copyright 2017 Erin Call <hello@erincall.com>
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+
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+This program is free software: you can redistribute it and/or modify
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+it under the terms of the GNU General Public License as published by
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+the Free Software Foundation, either version 2 of the License, or
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+(at your option) any later version.
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+
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+This program is distributed in the hope that it will be useful,
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+but WITHOUT ANY WARRANTY; without even the implied warranty of
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+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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+GNU General Public License for more details.
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+
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+You should have received a copy of the GNU General Public License
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+along with this program. If not, see <http://www.gnu.org/licenses/>.
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+*/
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+#include <stdint.h>
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+#include <stdbool.h>
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+#include <avr/io.h>
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+#include "wait.h"
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+#include "action_layer.h"
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+#include "print.h"
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+#include "debug.h"
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+#include "util.h"
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+#include "matrix.h"
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+#include "pterodactyl.h"
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+#include "i2c_master.h"
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+#include "timer.h"
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+
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+#define I2C_TIMEOUT 100
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+
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+#define I2C_ADDR 0b0100000
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+#define I2C_ADDR_WRITE ( (I2C_ADDR<<1) | I2C_WRITE )
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+#define I2C_ADDR_READ ( (I2C_ADDR<<1) | I2C_READ )
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+#define IODIRA 0x00 // i/o direction register
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+#define IODIRB 0x01
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+#define GPPUA 0x0C // GPIO pull-up resistor register
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+#define GPPUB 0x0D
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+#define GPIOA 0x12 // general purpose i/o port register (write modifies OLAT)
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+#define GPIOB 0x13
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+
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+void init_expander(void);
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+
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+/* Set 0 if debouncing isn't needed */
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+
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+#ifndef DEBOUNCE
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+# define DEBOUNCE 5
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+#endif
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+
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+#if (DEBOUNCE > 0)
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+ static uint16_t debouncing_time;
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+ static bool debouncing = false;
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+#endif
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+
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+#ifdef MATRIX_MASKED
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+ extern const matrix_row_t matrix_mask[];
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+#endif
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+
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+#if (DIODE_DIRECTION == ROW2COL) || (DIODE_DIRECTION == COL2ROW)
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+static const uint8_t onboard_row_pins[MATRIX_ROWS] = MATRIX_ONBOARD_ROW_PINS;
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+static const uint8_t onboard_col_pins[MATRIX_COLS] = MATRIX_ONBOARD_COL_PINS;
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+static const bool col_expanded[MATRIX_COLS] = COL_EXPANDED;
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+#endif
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+
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+/* matrix state(1:on, 0:off) */
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+static matrix_row_t matrix[MATRIX_ROWS];
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+
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+static matrix_row_t matrix_debouncing[MATRIX_ROWS];
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+
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+#if (DIODE_DIRECTION == COL2ROW)
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+ static const uint8_t expander_col_pins[MATRIX_COLS] = MATRIX_EXPANDER_COL_PINS;
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+ static void init_cols(void);
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+ static bool read_cols_on_row(matrix_row_t current_matrix[], uint8_t current_row);
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+ static void unselect_rows(void);
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+ static void select_row(uint8_t row);
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+ static void unselect_row(uint8_t row);
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+#elif (DIODE_DIRECTION == ROW2COL)
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+ static const uint8_t expander_row_pins[MATRIX_ROWS] = MATRIX_EXPANDER_ROW_PINS;
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+ static void init_rows(void);
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+ static bool read_rows_on_col(matrix_row_t current_matrix[], uint8_t current_col);
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+ static void unselect_cols(void);
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+ static void select_col(uint8_t col);
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+ static void unselect_col(uint8_t col);
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+#endif
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+
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+static uint8_t expander_reset_loop;
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+uint8_t expander_status;
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+uint8_t expander_input_pin_mask;
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+bool i2c_initialized = false;
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+
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+#define ROW_SHIFTER ((matrix_row_t)1)
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+
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+__attribute__ ((weak))
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+void matrix_init_user(void) {}
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+
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+__attribute__ ((weak))
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+void matrix_scan_user(void) {}
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+
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+__attribute__ ((weak))
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+void matrix_init_kb(void) {
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+ matrix_init_user();
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+}
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+
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+__attribute__ ((weak))
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+void matrix_scan_kb(void) {
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+ matrix_scan_user();
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+}
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+
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+inline
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+uint8_t matrix_rows(void)
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+{
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+ return MATRIX_ROWS;
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+}
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+
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+inline
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+uint8_t matrix_cols(void)
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+{
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+ return MATRIX_COLS;
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+}
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+
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+void matrix_init(void)
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+{
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+ init_expander();
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+
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+#if (DIODE_DIRECTION == COL2ROW)
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+ unselect_rows();
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+ init_cols();
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+#elif (DIODE_DIRECTION == ROW2COL)
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+ unselect_cols();
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+ init_rows();
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+#endif
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+
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+ // initialize matrix state: all keys off
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+ for (uint8_t i=0; i < MATRIX_ROWS; i++) {
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+ matrix[i] = 0;
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+ matrix_debouncing[i] = 0;
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+ }
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+
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+ matrix_init_quantum();
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+}
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+
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+void init_expander(void) {
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+ if (! i2c_initialized) {
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+ i2c_init();
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+ wait_us(1000000);
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+ }
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+
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+ if (! expander_input_pin_mask) {
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+#if (DIODE_DIRECTION == COL2ROW)
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+ for (int col = 0; col < MATRIX_COLS; col++) {
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+ if (col_expanded[col]) {
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+ expander_input_pin_mask |= (1 << expander_col_pins[col]);
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+ }
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+ }
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+#elif (DIODE_DIRECTION == ROW2COL)
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+ for (int row = 0; row < MATRIX_ROWS; row++) {
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+ expander_input_pin_mask |= (1 << expander_row_pins[row]);
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+ }
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+#endif
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+ }
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+
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+ expander_status = i2c_start(I2C_ADDR_WRITE, I2C_TIMEOUT); if (expander_status) goto out;
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+ expander_status = i2c_write(IODIRA, I2C_TIMEOUT); if (expander_status) goto out;
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+
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+ /*
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+ Pin direction and pull-up depends on both the diode direction
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+ and on whether the column register is GPIOA or GPIOB
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+ +-------+---------------+---------------+
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+ | | ROW2COL | COL2ROW |
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+ +-------+---------------+---------------+
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+ | GPIOA | input, output | output, input |
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+ +-------+---------------+---------------+
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+ | GPIOB | output, input | input, output |
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+ +-------+---------------+---------------+
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+ */
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+
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+#if (EXPANDER_COL_REGISTER == GPIOA)
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+# if (DIODE_DIRECTION == COL2ROW)
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+ expander_status = i2c_write(expander_input_pin_mask, I2C_TIMEOUT); if (expander_status) goto out;
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+ expander_status = i2c_write(0, I2C_TIMEOUT); if (expander_status) goto out;
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+# elif (DIODE_DIRECTION == ROW2COL)
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+ expander_status = i2c_write(0, I2C_TIMEOUT); if (expander_status) goto out;
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+ expander_status = i2c_write(expander_input_pin_mask, I2C_TIMEOUT); if (expander_status) goto out;
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+# endif
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+#elif (EXPANDER_COL_REGISTER == GPIOB)
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+# if (DIODE_DIRECTION == COL2ROW)
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+ expander_status = i2c_write(0, I2C_TIMEOUT); if (expander_status) goto out;
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+ expander_status = i2c_write(expander_input_pin_mask, I2C_TIMEOUT); if (expander_status) goto out;
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+# elif (DIODE_DIRECTION == ROW2COL)
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+ expander_status = i2c_write(expander_input_pin_mask, I2C_TIMEOUT); if (expander_status) goto out;
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+ expander_status = i2c_write(0, I2C_TIMEOUT); if (expander_status) goto out;
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+# endif
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+#endif
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+
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+ i2c_stop();
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+
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+ // set pull-up
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+ // - unused : off : 0
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+ // - input : on : 1
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+ // - driving : off : 0
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+ expander_status = i2c_start(I2C_ADDR_WRITE, I2C_TIMEOUT); if (expander_status) goto out;
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+ expander_status = i2c_write(GPPUA, I2C_TIMEOUT); if (expander_status) goto out;
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+#if (EXPANDER_COL_REGISTER == GPIOA)
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+# if (DIODE_DIRECTION == COL2ROW)
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+ expander_status = i2c_write(expander_input_pin_mask, I2C_TIMEOUT); if (expander_status) goto out;
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+ expander_status = i2c_write(0, I2C_TIMEOUT); if (expander_status) goto out;
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+# elif (DIODE_DIRECTION == ROW2COL)
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+ expander_status = i2c_write(0, I2C_TIMEOUT); if (expander_status) goto out;
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+ expander_status = i2c_write(expander_input_pin_mask, I2C_TIMEOUT); if (expander_status) goto out;
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+# endif
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+#elif (EXPANDER_COL_REGISTER == GPIOB)
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+# if (DIODE_DIRECTION == COL2ROW)
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+ expander_status = i2c_write(0, I2C_TIMEOUT); if (expander_status) goto out;
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+ expander_status = i2c_write(expander_input_pin_mask, I2C_TIMEOUT); if (expander_status) goto out;
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+# elif (DIODE_DIRECTION == ROW2COL)
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+ expander_status = i2c_write(expander_input_pin_mask, I2C_TIMEOUT); if (expander_status) goto out;
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+ expander_status = i2c_write(0, I2C_TIMEOUT); if (expander_status) goto out;
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+# endif
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+#endif
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+
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+out:
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+ i2c_stop();
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+}
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+
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+uint8_t matrix_scan(void)
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+{
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+ if (expander_status) { // if there was an error
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+ if (++expander_reset_loop == 0) {
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+ // since expander_reset_loop is 8 bit - we'll try to reset once in 255 matrix scans
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+ // this will be approx bit more frequent than once per second
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+ print("trying to reset expander\n");
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+ init_expander();
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+ if (expander_status) {
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+ print("left side not responding\n");
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+ } else {
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+ print("left side attached\n");
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+ }
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+ }
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+ }
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+
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+#if (DIODE_DIRECTION == COL2ROW)
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+ for (uint8_t current_row = 0; current_row < MATRIX_ROWS; current_row++) {
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+# if (DEBOUNCE > 0)
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+ bool matrix_changed = read_cols_on_row(matrix_debouncing, current_row);
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+
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+ if (matrix_changed) {
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+ debouncing = true;
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+ debouncing_time = timer_read();
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+ }
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+# else
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+ read_cols_on_row(matrix, current_row);
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+# endif
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+ }
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+
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+#elif (DIODE_DIRECTION == ROW2COL)
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+ for (uint8_t current_col = 0; current_col < MATRIX_COLS; current_col++) {
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+# if (DEBOUNCE > 0)
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+ bool matrix_changed = read_rows_on_col(matrix_debouncing, current_col);
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+
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+ if (matrix_changed) {
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+ debouncing = true;
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+ debouncing_time = timer_read();
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+ }
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+# else
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+ read_rows_on_col(matrix, current_col);
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+# endif
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+
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+ }
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+#endif
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+
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+# if (DEBOUNCE > 0)
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+ if (debouncing && (timer_elapsed(debouncing_time) > DEBOUNCE)) {
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+ for (uint8_t i = 0; i < MATRIX_ROWS; i++) {
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+ matrix[i] = matrix_debouncing[i];
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+ }
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+ debouncing = false;
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+ }
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+# endif
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+
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+ matrix_scan_quantum();
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+ return 1;
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+}
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+
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+bool matrix_is_modified(void) // deprecated and evidently not called.
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+{
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+#if (DEBOUNCE > 0)
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+ if (debouncing) return false;
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+#endif
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+ return true;
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+}
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+
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+inline
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+bool matrix_is_on(uint8_t row, uint8_t col)
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+{
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+ return (matrix[row] & (ROW_SHIFTER << col));
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+}
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+
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+inline
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+matrix_row_t matrix_get_row(uint8_t row)
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+{
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+#ifdef MATRIX_MASKED
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+ return matrix[row] & matrix_mask[row];
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+#else
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+ return matrix[row];
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+#endif
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+}
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+
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+void matrix_print(void)
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+{
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+ print("\nr/c 0123456789ABCDEF\n");
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+ for (uint8_t row = 0; row < MATRIX_ROWS; row++) {
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+ phex(row); print(": ");
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+ pbin_reverse16(matrix_get_row(row));
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+ print("\n");
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+ }
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+}
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+
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+uint8_t matrix_key_count(void)
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+{
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+ uint8_t count = 0;
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+ for (uint8_t i = 0; i < MATRIX_ROWS; i++) {
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+ count += bitpop16(matrix[i]);
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+ }
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+ return count;
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+}
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+
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+#if (DIODE_DIRECTION == COL2ROW)
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+
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+static void init_cols(void) {
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+ for (uint8_t x = 0; x < MATRIX_COLS; x++) {
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+ if (! col_expanded[x]) {
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+ uint8_t pin = onboard_col_pins[x];
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+ _SFR_IO8((pin >> 4) + 1) &= ~_BV(pin & 0xF); // IN
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+ _SFR_IO8((pin >> 4) + 2) |= _BV(pin & 0xF); // HI
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+ }
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+ }
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+}
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+
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+static bool read_cols_on_row(matrix_row_t current_matrix[], uint8_t current_row) {
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+ // Store last value of row prior to reading
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+ matrix_row_t last_row_value = current_matrix[current_row];
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+
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+ // Clear data in matrix row
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+ current_matrix[current_row] = 0;
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+
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+ // Select row and wait for row selection to stabilize
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+ select_row(current_row);
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+ wait_us(30);
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+
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+ // Read columns from expander, unless it's in an error state
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+ if (! expander_status) {
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+ expander_status = i2c_start(I2C_ADDR_WRITE, I2C_TIMEOUT); if (expander_status) goto out;
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+ expander_status = i2c_write(EXPANDER_COL_REGISTER, I2C_TIMEOUT); if (expander_status) goto out;
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+ expander_status = i2c_start(I2C_ADDR_READ, I2C_TIMEOUT); if (expander_status) goto out;
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+
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+ current_matrix[current_row] |= (~i2c_read_nack(I2C_TIMEOUT)) & expander_input_pin_mask;
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+
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+ out:
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+ i2c_stop();
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+ }
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+
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+ // Read columns from onboard pins
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+ for (uint8_t col_index = 0; col_index < MATRIX_COLS; col_index++) {
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+ if (! col_expanded[col_index]) {
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+ uint8_t pin = onboard_col_pins[col_index];
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+ uint8_t pin_state = (_SFR_IO8(pin >> 4) & _BV(pin & 0xF));
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+ current_matrix[current_row] |= pin_state ? 0 : (ROW_SHIFTER << col_index);
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+ }
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+ }
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+
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+ unselect_row(current_row);
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+
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+ return (last_row_value != current_matrix[current_row]);
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+}
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+
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+static void select_row(uint8_t row) {
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+ // select on expander, unless it's in an error state
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+ if (! expander_status) {
|
|
|
+ // set active row low : 0
|
|
|
+ // set other rows hi-Z : 1
|
|
|
+ expander_status = i2c_start(I2C_ADDR_WRITE, I2C_TIMEOUT); if (expander_status) goto out;
|
|
|
+ expander_status = i2c_write(EXPANDER_ROW_REGISTER, I2C_TIMEOUT); if (expander_status) goto out;
|
|
|
+ expander_status = i2c_write(0xFF & ~(1<<row), I2C_TIMEOUT); if (expander_status) goto out;
|
|
|
+ out:
|
|
|
+ i2c_stop();
|
|
|
+ }
|
|
|
+
|
|
|
+ // select on teensy
|
|
|
+ uint8_t pin = onboard_row_pins[row];
|
|
|
+ _SFR_IO8((pin >> 4) + 1) |= _BV(pin & 0xF); // OUT
|
|
|
+ _SFR_IO8((pin >> 4) + 2) &= ~_BV(pin & 0xF); // LOW
|
|
|
+}
|
|
|
+
|
|
|
+static void unselect_row(uint8_t row)
|
|
|
+{
|
|
|
+ // No need to explicitly unselect expander pins--their I/O state is
|
|
|
+ // set simultaneously, with a single bitmask sent to i2c_write. When
|
|
|
+ // select_row selects a single pin, it implicitly unselects all the
|
|
|
+ // other ones.
|
|
|
+
|
|
|
+ // unselect on teensy
|
|
|
+ uint8_t pin = onboard_row_pins[row];
|
|
|
+ _SFR_IO8((pin >> 4) + 1) &= ~_BV(pin & 0xF); // OUT
|
|
|
+ _SFR_IO8((pin >> 4) + 2) |= _BV(pin & 0xF); // LOW
|
|
|
+}
|
|
|
+
|
|
|
+static void unselect_rows(void) {
|
|
|
+ for (uint8_t x = 0; x < MATRIX_ROWS; x++) {
|
|
|
+ unselect_row(x);
|
|
|
+ }
|
|
|
+}
|
|
|
+
|
|
|
+#elif (DIODE_DIRECTION == ROW2COL)
|
|
|
+
|
|
|
+static void init_rows(void)
|
|
|
+{
|
|
|
+ for (uint8_t x = 0; x < MATRIX_ROWS; x++) {
|
|
|
+ uint8_t pin = onboard_row_pins[x];
|
|
|
+ _SFR_IO8((pin >> 4) + 1) &= ~_BV(pin & 0xF); // IN
|
|
|
+ _SFR_IO8((pin >> 4) + 2) |= _BV(pin & 0xF); // HI
|
|
|
+ }
|
|
|
+}
|
|
|
+
|
|
|
+static bool read_rows_on_col(matrix_row_t current_matrix[], uint8_t current_col)
|
|
|
+{
|
|
|
+ bool matrix_changed = false;
|
|
|
+
|
|
|
+ uint8_t column_state = 0;
|
|
|
+
|
|
|
+ //select col and wait for selection to stabilize
|
|
|
+ select_col(current_col);
|
|
|
+ wait_us(30);
|
|
|
+
|
|
|
+ if (current_col < 6) {
|
|
|
+ // read rows from expander
|
|
|
+ if (expander_status) {
|
|
|
+ // it's already in an error state; nothing we can do
|
|
|
+ return false;
|
|
|
+ }
|
|
|
+
|
|
|
+ expander_status = i2c_start(I2C_ADDR_WRITE, I2C_TIMEOUT); if (expander_status) goto out;
|
|
|
+ expander_status = i2c_write(EXPANDER_ROW_REGISTER, I2C_TIMEOUT); if (expander_status) goto out;
|
|
|
+ expander_status = i2c_start(I2C_ADDR_READ, I2C_TIMEOUT); if (expander_status) goto out;
|
|
|
+ column_state = i2c_read_nack(I2C_TIMEOUT);
|
|
|
+
|
|
|
+ out:
|
|
|
+ i2c_stop();
|
|
|
+
|
|
|
+ column_state = ~column_state;
|
|
|
+ } else {
|
|
|
+ for (uint8_t current_row = 0; current_row < MATRIX_ROWS; current_row++) {
|
|
|
+ if ((_SFR_IO8(onboard_row_pins[current_row] >> 4) & _BV(onboard_row_pins[current_row] & 0xF)) == 0) {
|
|
|
+ column_state |= (1 << current_row);
|
|
|
+ }
|
|
|
+ }
|
|
|
+ }
|
|
|
+
|
|
|
+ for (uint8_t current_row = 0; current_row < MATRIX_ROWS; current_row++) {
|
|
|
+ // Store last value of row prior to reading
|
|
|
+ matrix_row_t last_row_value = current_matrix[current_row];
|
|
|
+
|
|
|
+ if (column_state & (1 << current_row)) {
|
|
|
+ // key closed; set state bit in matrix
|
|
|
+ current_matrix[current_row] |= (ROW_SHIFTER << current_col);
|
|
|
+ } else {
|
|
|
+ // key open; clear state bit in matrix
|
|
|
+ current_matrix[current_row] &= ~(ROW_SHIFTER << current_col);
|
|
|
+ }
|
|
|
+
|
|
|
+ // Determine whether the matrix changed state
|
|
|
+ if ((last_row_value != current_matrix[current_row]) && !(matrix_changed))
|
|
|
+ {
|
|
|
+ matrix_changed = true;
|
|
|
+ }
|
|
|
+ }
|
|
|
+
|
|
|
+ unselect_col(current_col);
|
|
|
+
|
|
|
+ return matrix_changed;
|
|
|
+}
|
|
|
+
|
|
|
+static void select_col(uint8_t col)
|
|
|
+{
|
|
|
+ if (col_expanded[col]) {
|
|
|
+ // select on expander
|
|
|
+ if (expander_status) { // if there was an error
|
|
|
+ // do nothing
|
|
|
+ } else {
|
|
|
+ // set active col low : 0
|
|
|
+ // set other cols hi-Z : 1
|
|
|
+ expander_status = i2c_start(I2C_ADDR_WRITE); if (expander_status) goto out;
|
|
|
+ expander_status = i2c_write(EXPANDER_COL_REGISTER); if (expander_status) goto out;
|
|
|
+ expander_status = i2c_write(0xFF & ~(1<<col)); if (expander_status) goto out;
|
|
|
+ out:
|
|
|
+ i2c_stop();
|
|
|
+ }
|
|
|
+ } else {
|
|
|
+ // select on teensy
|
|
|
+ uint8_t pin = onboard_col_pins[col];
|
|
|
+ _SFR_IO8((pin >> 4) + 1) |= _BV(pin & 0xF); // OUT
|
|
|
+ _SFR_IO8((pin >> 4) + 2) &= ~_BV(pin & 0xF); // LOW
|
|
|
+ }
|
|
|
+}
|
|
|
+
|
|
|
+static void unselect_col(uint8_t col)
|
|
|
+{
|
|
|
+ if (col_expanded[col]) {
|
|
|
+ // No need to explicitly unselect expander pins--their I/O state is
|
|
|
+ // set simultaneously, with a single bitmask sent to i2c_write. When
|
|
|
+ // select_col selects a single pin, it implicitly unselects all the
|
|
|
+ // other ones.
|
|
|
+ } else {
|
|
|
+ // unselect on teensy
|
|
|
+ uint8_t pin = onboard_col_pins[col];
|
|
|
+ _SFR_IO8((pin >> 4) + 1) &= ~_BV(pin & 0xF); // IN
|
|
|
+ _SFR_IO8((pin >> 4) + 2) |= _BV(pin & 0xF); // HI
|
|
|
+ }
|
|
|
+}
|
|
|
+
|
|
|
+static void unselect_cols(void)
|
|
|
+{
|
|
|
+ for(uint8_t x = 0; x < MATRIX_COLS; x++) {
|
|
|
+ unselect_col(x);
|
|
|
+ }
|
|
|
+}
|
|
|
+#endif
|
myoung34