1 files changed, 527 insertions, 0 deletions

diff --git a/keyboards/handwired/pterodactyl/matrix.c b/keyboards/handwired/pterodactyl/matrix.c
new file mode 100644
index 000000000..5f13cb30b
--- /dev/null
+++ b/keyboards/handwired/pterodactyl/matrix.c
@@ -0,0 +1,527 @@
+/*
+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