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-rw-r--r--keyboards/handwired/pterodactyl/matrix.c527
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diff --git a/keyboards/handwired/pterodactyl/matrix.c b/keyboards/handwired/pterodactyl/matrix.c
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+++ b/keyboards/handwired/pterodactyl/matrix.c
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+/*
+Copyright 2013 Oleg Kostyuk <cub.uanic@gmail.com>
+Copyright 2017 Erin Call <hello@erincall.com>
+
+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 <avr/io.h>
+#include "wait.h"
+#include "action_layer.h"
+#include "print.h"
+#include "debug.h"
+#include "util.h"
+#include "matrix.h"
+#include "pterodactyl.h"
+#include "i2c_master.h"
+#include "timer.h"
+
+#define I2C_TIMEOUT 100
+
+#define I2C_ADDR 0b0100000
+#define I2C_ADDR_WRITE ( (I2C_ADDR<<1) | I2C_WRITE )
+#define I2C_ADDR_READ ( (I2C_ADDR<<1) | I2C_READ )
+#define IODIRA 0x00 // i/o direction register
+#define IODIRB 0x01
+#define GPPUA 0x0C // GPIO pull-up resistor register
+#define GPPUB 0x0D
+#define GPIOA 0x12 // general purpose i/o port register (write modifies OLAT)
+#define GPIOB 0x13
+
+void init_expander(void);
+
+/* Set 0 if debouncing isn't needed */
+
+#ifndef DEBOUNCE
+# define DEBOUNCE 5
+#endif
+
+#if (DEBOUNCE > 0)
+ static uint16_t debouncing_time;
+ static bool debouncing = false;
+#endif
+
+#ifdef MATRIX_MASKED
+ extern const matrix_row_t matrix_mask[];
+#endif
+
+#if (DIODE_DIRECTION == ROW2COL) || (DIODE_DIRECTION == COL2ROW)
+static const uint8_t onboard_row_pins[MATRIX_ROWS] = MATRIX_ONBOARD_ROW_PINS;
+static const uint8_t onboard_col_pins[MATRIX_COLS] = MATRIX_ONBOARD_COL_PINS;
+static const bool col_expanded[MATRIX_COLS] = COL_EXPANDED;
+#endif
+
+/* matrix state(1:on, 0:off) */
+static matrix_row_t matrix[MATRIX_ROWS];
+
+static matrix_row_t matrix_debouncing[MATRIX_ROWS];
+
+#if (DIODE_DIRECTION == COL2ROW)
+ static const uint8_t expander_col_pins[MATRIX_COLS] = MATRIX_EXPANDER_COL_PINS;
+ static void init_cols(void);
+ static bool read_cols_on_row(matrix_row_t current_matrix[], uint8_t current_row);
+ static void unselect_rows(void);
+ static void select_row(uint8_t row);
+ static void unselect_row(uint8_t row);
+#elif (DIODE_DIRECTION == ROW2COL)
+ static const uint8_t expander_row_pins[MATRIX_ROWS] = MATRIX_EXPANDER_ROW_PINS;
+ static void init_rows(void);
+ static bool read_rows_on_col(matrix_row_t current_matrix[], uint8_t current_col);
+ static void unselect_cols(void);
+ static void select_col(uint8_t col);
+ static void unselect_col(uint8_t col);
+#endif
+
+static uint8_t expander_reset_loop;
+uint8_t expander_status;
+uint8_t expander_input_pin_mask;
+bool i2c_initialized = false;
+
+#define ROW_SHIFTER ((matrix_row_t)1)
+
+__attribute__ ((weak))
+void matrix_init_user(void) {}
+
+__attribute__ ((weak))
+void matrix_scan_user(void) {}
+
+__attribute__ ((weak))
+void matrix_init_kb(void) {
+ matrix_init_user();
+}
+
+__attribute__ ((weak))
+void matrix_scan_kb(void) {
+ matrix_scan_user();
+}
+
+inline
+uint8_t matrix_rows(void)
+{
+ return MATRIX_ROWS;
+}
+
+inline
+uint8_t matrix_cols(void)
+{
+ return MATRIX_COLS;
+}
+
+void matrix_init(void)
+{
+ init_expander();
+
+#if (DIODE_DIRECTION == COL2ROW)
+ unselect_rows();
+ init_cols();
+#elif (DIODE_DIRECTION == ROW2COL)
+ unselect_cols();
+ init_rows();
+#endif
+
+ // initialize matrix state: all keys off
+ for (uint8_t i=0; i < MATRIX_ROWS; i++) {
+ matrix[i] = 0;
+ matrix_debouncing[i] = 0;
+ }
+
+ matrix_init_quantum();
+}
+
+void init_expander(void) {
+ if (! i2c_initialized) {
+ i2c_init();
+ wait_us(1000000);
+ }
+
+ if (! expander_input_pin_mask) {
+#if (DIODE_DIRECTION == COL2ROW)
+ for (int col = 0; col < MATRIX_COLS; col++) {
+ if (col_expanded[col]) {
+ expander_input_pin_mask |= (1 << expander_col_pins[col]);
+ }
+ }
+#elif (DIODE_DIRECTION == ROW2COL)
+ for (int row = 0; row < MATRIX_ROWS; row++) {
+ expander_input_pin_mask |= (1 << expander_row_pins[row]);
+ }
+#endif
+ }
+
+ expander_status = i2c_start(I2C_ADDR_WRITE, I2C_TIMEOUT); if (expander_status) goto out;
+ expander_status = i2c_write(IODIRA, I2C_TIMEOUT); if (expander_status) goto out;
+
+ /*
+ Pin direction and pull-up depends on both the diode direction
+ and on whether the column register is GPIOA or GPIOB
+ +-------+---------------+---------------+
+ | | ROW2COL | COL2ROW |
+ +-------+---------------+---------------+
+ | GPIOA | input, output | output, input |
+ +-------+---------------+---------------+
+ | GPIOB | output, input | input, output |
+ +-------+---------------+---------------+
+ */
+
+#if (EXPANDER_COL_REGISTER == GPIOA)
+# if (DIODE_DIRECTION == COL2ROW)
+ expander_status = i2c_write(expander_input_pin_mask, I2C_TIMEOUT); if (expander_status) goto out;
+ expander_status = i2c_write(0, I2C_TIMEOUT); if (expander_status) goto out;
+# elif (DIODE_DIRECTION == ROW2COL)
+ expander_status = i2c_write(0, I2C_TIMEOUT); if (expander_status) goto out;
+ expander_status = i2c_write(expander_input_pin_mask, I2C_TIMEOUT); if (expander_status) goto out;
+# endif
+#elif (EXPANDER_COL_REGISTER == GPIOB)
+# if (DIODE_DIRECTION == COL2ROW)
+ expander_status = i2c_write(0, I2C_TIMEOUT); if (expander_status) goto out;
+ expander_status = i2c_write(expander_input_pin_mask, I2C_TIMEOUT); if (expander_status) goto out;
+# elif (DIODE_DIRECTION == ROW2COL)
+ expander_status = i2c_write(expander_input_pin_mask, I2C_TIMEOUT); if (expander_status) goto out;
+ expander_status = i2c_write(0, I2C_TIMEOUT); if (expander_status) goto out;
+# endif
+#endif
+
+ i2c_stop();
+
+ // set pull-up
+ // - unused : off : 0
+ // - input : on : 1
+ // - driving : off : 0
+ expander_status = i2c_start(I2C_ADDR_WRITE, I2C_TIMEOUT); if (expander_status) goto out;
+ expander_status = i2c_write(GPPUA, I2C_TIMEOUT); if (expander_status) goto out;
+#if (EXPANDER_COL_REGISTER == GPIOA)
+# if (DIODE_DIRECTION == COL2ROW)
+ expander_status = i2c_write(expander_input_pin_mask, I2C_TIMEOUT); if (expander_status) goto out;
+ expander_status = i2c_write(0, I2C_TIMEOUT); if (expander_status) goto out;
+# elif (DIODE_DIRECTION == ROW2COL)
+ expander_status = i2c_write(0, I2C_TIMEOUT); if (expander_status) goto out;
+ expander_status = i2c_write(expander_input_pin_mask, I2C_TIMEOUT); if (expander_status) goto out;
+# endif
+#elif (EXPANDER_COL_REGISTER == GPIOB)
+# if (DIODE_DIRECTION == COL2ROW)
+ expander_status = i2c_write(0, I2C_TIMEOUT); if (expander_status) goto out;
+ expander_status = i2c_write(expander_input_pin_mask, I2C_TIMEOUT); if (expander_status) goto out;
+# elif (DIODE_DIRECTION == ROW2COL)
+ expander_status = i2c_write(expander_input_pin_mask, I2C_TIMEOUT); if (expander_status) goto out;
+ expander_status = i2c_write(0, I2C_TIMEOUT); if (expander_status) goto out;
+# endif
+#endif
+
+out:
+ i2c_stop();
+}
+
+uint8_t matrix_scan(void)
+{
+ if (expander_status) { // if there was an error
+ if (++expander_reset_loop == 0) {
+ // since expander_reset_loop is 8 bit - we'll try to reset once in 255 matrix scans
+ // this will be approx bit more frequent than once per second
+ print("trying to reset expander\n");
+ init_expander();
+ if (expander_status) {
+ print("left side not responding\n");
+ } else {
+ print("left side attached\n");
+ }
+ }
+ }
+
+#if (DIODE_DIRECTION == COL2ROW)
+ for (uint8_t current_row = 0; current_row < MATRIX_ROWS; current_row++) {
+# if (DEBOUNCE > 0)
+ bool matrix_changed = read_cols_on_row(matrix_debouncing, current_row);
+
+ if (matrix_changed) {
+ debouncing = true;
+ debouncing_time = timer_read();
+ }
+# else
+ read_cols_on_row(matrix, current_row);
+# endif
+ }
+
+#elif (DIODE_DIRECTION == ROW2COL)
+ for (uint8_t current_col = 0; current_col < MATRIX_COLS; current_col++) {
+# if (DEBOUNCE > 0)
+ bool matrix_changed = read_rows_on_col(matrix_debouncing, current_col);
+
+ if (matrix_changed) {
+ debouncing = true;
+ debouncing_time = timer_read();
+ }
+# else
+ read_rows_on_col(matrix, current_col);
+# endif
+
+ }
+#endif
+
+# if (DEBOUNCE > 0)
+ if (debouncing && (timer_elapsed(debouncing_time) > DEBOUNCE)) {
+ for (uint8_t i = 0; i < MATRIX_ROWS; i++) {
+ matrix[i] = matrix_debouncing[i];
+ }
+ debouncing = false;
+ }
+# endif
+
+ matrix_scan_quantum();
+ return 1;
+}
+
+bool matrix_is_modified(void) // deprecated and evidently not called.
+{
+#if (DEBOUNCE > 0)
+ if (debouncing) return false;
+#endif
+ return true;
+}
+
+inline
+bool matrix_is_on(uint8_t row, uint8_t col)
+{
+ return (matrix[row] & (ROW_SHIFTER << col));
+}
+
+inline
+matrix_row_t matrix_get_row(uint8_t row)
+{
+#ifdef MATRIX_MASKED
+ return matrix[row] & matrix_mask[row];
+#else
+ return matrix[row];
+#endif
+}
+
+void matrix_print(void)
+{
+ print("\nr/c 0123456789ABCDEF\n");
+ for (uint8_t row = 0; row < MATRIX_ROWS; row++) {
+ phex(row); print(": ");
+ pbin_reverse16(matrix_get_row(row));
+ print("\n");
+ }
+}
+
+uint8_t matrix_key_count(void)
+{
+ uint8_t count = 0;
+ for (uint8_t i = 0; i < MATRIX_ROWS; i++) {
+ count += bitpop16(matrix[i]);
+ }
+ return count;
+}
+
+#if (DIODE_DIRECTION == COL2ROW)
+
+static void init_cols(void) {
+ for (uint8_t x = 0; x < MATRIX_COLS; x++) {
+ if (! col_expanded[x]) {
+ uint8_t pin = onboard_col_pins[x];
+ _SFR_IO8((pin >> 4) + 1) &= ~_BV(pin & 0xF); // IN
+ _SFR_IO8((pin >> 4) + 2) |= _BV(pin & 0xF); // HI
+ }
+ }
+}
+
+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 selection to stabilize
+ select_row(current_row);
+ wait_us(30);
+
+ // Read columns from expander, unless it's in an error state
+ if (! expander_status) {
+ expander_status = i2c_start(I2C_ADDR_WRITE, I2C_TIMEOUT); if (expander_status) goto out;
+ expander_status = i2c_write(EXPANDER_COL_REGISTER, I2C_TIMEOUT); if (expander_status) goto out;
+ expander_status = i2c_start(I2C_ADDR_READ, I2C_TIMEOUT); if (expander_status) goto out;
+
+ current_matrix[current_row] |= (~i2c_read_nack(I2C_TIMEOUT)) & expander_input_pin_mask;
+
+ out:
+ i2c_stop();
+ }
+
+ // Read columns from onboard pins
+ for (uint8_t col_index = 0; col_index < MATRIX_COLS; col_index++) {
+ if (! col_expanded[col_index]) {
+ uint8_t pin = onboard_col_pins[col_index];
+ uint8_t pin_state = (_SFR_IO8(pin >> 4) & _BV(pin & 0xF));
+ current_matrix[current_row] |= pin_state ? 0 : (ROW_SHIFTER << col_index);
+ }
+ }
+
+ unselect_row(current_row);
+
+ return (last_row_value != current_matrix[current_row]);
+}
+
+static void select_row(uint8_t row) {
+ // select on expander, unless it's in an error state
+ 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