Keyboard: xealous (#3731)

* Keyboard: HandWired/XeaL60

* Updated rules.mk

* Mapping for layout was flipped

* Figured out how to re-map bad pins.

* Updated Keymap

* Enabled audio, Forced NKRO

* Added QMK_KEYS_PER_SCAN

* Removed more unnecessary files, since split_keyboards are in main QMK branch already.

* Simplified rules.mk in rev1

* Removed i2c from matrix.c

* Re-formatted to 4 spaces per tab,

* Changed note for NUMPAD

* Added I2C support back!

* Fixed keyboard mappings. Both sides work

* Moved i2c configuration from keymaps/default/config.h to config.h

* Changed SCL_CLOCK to 400000L

* Added DEBUG_MATRIX_SCAN_RATE for future optimization efforts

* Removed row2col code to clean up matrix.c

* Scan rate from 2100 -> 4200 by using Nop instead of waiting 30us between columns.

* Further optimized column reading via optimized_col_reader.

* Immediate key-recognition

* Switched back to own implementation of SPLIT_KEYBOARD. Will optimize so that slave interrupts master.

* Moved scanrate debug messages to another file.

* Made matrix_scanrate.c compile if CONSOLE_ENABLE is off. Updated to latest i2c.c

* Latest i2c uses a few bytes for lighting information

* Optimizations in i2c.h to determine buffer size.

* Disabled a whole bunch of features. TODO: Test that keyboard still works fine.

* Minimum #define NO_ACTION's with still working keyboard

* Fixed matrix not working due to offsets not being respected

* Added numlock button for keymap.

* Use I2C_KEYMAP_START offset

* Removed serial, Backlight and RGB support

* Removed need for split_flags.

* Added audio on and off for numlock.

* Renamed from xeal60 to xealous, simplified build system.

* Used more shared split_common code.

* Updated audio code.

* moved tone_qwerty and tone_numpad to config.h. Removed keymaps/default/config.h

* Added more shortcut keys in _FN layer. Increased debounce to 6ms due to fencepost error.

* DF used with incorrect argument. Custom_keycodes no longer required.

* Fixed bug in update_debounce_counters which was resulting in no debouncing!

* Removed unnecessary #include

1 files changed, 376 insertions, 0 deletions

diff --git a/keyboards/handwired/xealous/matrix.c b/keyboards/handwired/xealous/matrix.c
new file mode 100644
index 0000000000..27fad00083
--- /dev/null
+++ b/keyboards/handwired/xealous/matrix.c
@@ -0,0 +1,376 @@
+/*
+Copyright 2012 Jun Wako <wakojun@gmail.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/>.
+*/
+
+/*
+ * scan matrix
+ */
+#include <stdint.h>
+#include <stdbool.h>
+#include <avr/io.h>
+#include "wait.h"
+#include "print.h"
+#include "debug.h"
+#include "util.h"
+#include "matrix.h"
+#include "split_util.h"
+#include "pro_micro.h"
+#include "config.h"
+#include "timer.h"
+#ifdef DEBUG_MATRIX_SCAN_RATE
+    #include "matrix_scanrate.h"
+#endif
+
+
+
+#ifdef USE_I2C
+#  include "i2c.h"
+#else // USE_SERIAL
+#  error "only i2c supported"
+#endif
+
+#ifndef DEBOUNCING_DELAY
+#   define DEBOUNCING_DELAY 5
+#endif
+
+
+#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)
+#else
+#    error "Currently only supports 8 COLS"
+#endif
+
+#define ERROR_DISCONNECT_COUNT 5
+
+#define ROWS_PER_HAND (MATRIX_ROWS/2)
+
+static uint8_t error_count = 0;
+
+static const uint8_t row_pins[MATRIX_ROWS] = MATRIX_ROW_PINS;
+static const uint8_t col_pins[MATRIX_COLS] = MATRIX_COL_PINS;
+
+/* matrix state(1:on, 0:off) */
+static matrix_row_t matrix[MATRIX_ROWS];
+static matrix_row_t matrix_debouncing[MATRIX_ROWS];
+static matrix_row_t* debouncing_matrix_hand_offsetted; //pointer to matrix_debouncing for our hand
+static matrix_row_t* matrix_hand_offsetted; // pointer to matrix for our hand
+
+//Debouncing counters
+typedef uint8_t debounce_counter_t;
+#define DEBOUNCE_COUNTER_MODULO 250
+#define DEBOUNCE_COUNTER_INACTIVE 251
+static debounce_counter_t debounce_counters[MATRIX_ROWS * MATRIX_COLS];
+static debounce_counter_t *debounce_counters_hand_offsetted;
+
+
+#if (DIODE_DIRECTION == ROW2COL)
+    error "Only Col2Row supported";
+#endif
+static void init_cols(void);
+static void unselect_rows(void);
+static void select_row(uint8_t row);
+static void unselect_row(uint8_t row);
+static matrix_row_t optimized_col_reader(void);
+
+__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) {
+}
+
+__attribute__ ((weak))
+void matrix_slave_scan_user(void) {
+}
+
+inline
+uint8_t matrix_rows(void)
+{
+    return MATRIX_ROWS;
+}
+
+inline
+uint8_t matrix_cols(void)
+{
+    return MATRIX_COLS;
+}
+
+void matrix_init(void)
+{
+#ifdef DISABLE_JTAG
+  // JTAG disable for PORT F. write JTD bit twice within four cycles.
+  MCUCR |= (1<<JTD);
+  MCUCR |= (1<<JTD);
+#endif
+
+    debug_enable = true;
+    debug_matrix = false;
+    debug_mouse = false;
+    // initialize row and col
+    unselect_rows();
+    init_cols();
+
+    TX_RX_LED_INIT;
+
+    // initialize matrix state: all keys off
+    for (uint8_t i=0; i < MATRIX_ROWS; i++) {
+        matrix[i] = 0;
+        matrix_debouncing[i] = 0;
+    }
+    int my_hand_offset = isLeftHand ? 0 : (ROWS_PER_HAND);
+    debouncing_matrix_hand_offsetted = matrix_debouncing + my_hand_offset;
+    matrix_hand_offsetted = matrix + my_hand_offset;
+    debounce_counters_hand_offsetted = debounce_counters + my_hand_offset;
+
+    for (uint8_t i = 0; i < MATRIX_ROWS * MATRIX_COLS; i++) {
+        debounce_counters[i] = DEBOUNCE_COUNTER_INACTIVE;
+    }
+    
+    matrix_init_quantum();
+
+}
+
+//#define TIMER_DIFF(a, b, max)   ((a) >= (b) ?  (a) - (b) : (max) - (b) + (a))
+void update_debounce_counters(uint8_t current_time)
+{
+    debounce_counter_t *debounce_pointer = debounce_counters_hand_offsetted;
+    for (uint8_t row = 0; row < ROWS_PER_HAND; row++)
+    {
+        for (uint8_t col = 0; col < MATRIX_COLS; col++)
+        {
+            if (*debounce_pointer != DEBOUNCE_COUNTER_INACTIVE)
+            {
+                if (TIMER_DIFF(current_time, *debounce_pointer, DEBOUNCE_COUNTER_MODULO) >=
+                    DEBOUNCING_DELAY) {
+                        *debounce_pointer = DEBOUNCE_COUNTER_INACTIVE;
+                    }
+            }
+            debounce_pointer++;
+        }
+    }
+}
+
+void transfer_matrix_values(uint8_t current_time)
+{
+    //upload from debounce_matrix to final matrix;
+    debounce_counter_t *debounce_pointer = debounce_counters_hand_offsetted;
+    for (uint8_t row = 0; row < ROWS_PER_HAND; row++)
+    {
+        matrix_row_t row_value = matrix_hand_offsetted[row];
+        matrix_row_t debounce_value = debouncing_matrix_hand_offsetted[row];
+
+        for (uint8_t col = 0; col < MATRIX_COLS; col++)
+        {
+            bool final_value = debounce_value & (1 << col);
+            bool current_value = row_value & (1 << col);
+            if (*debounce_pointer == DEBOUNCE_COUNTER_INACTIVE
+                && (current_value != final_value))
+            {
+                *debounce_pointer = current_time;
+                row_value ^= (1 << col);
+            }
+            debounce_pointer++;
+        }
+        matrix_hand_offsetted[row] = row_value;
+    }
+}
+
+uint8_t _matrix_scan(void)
+{
+    uint8_t current_time = timer_read() % DEBOUNCE_COUNTER_MODULO;
+    
+    // Set row, read cols
+    for (uint8_t current_row = 0; current_row < ROWS_PER_HAND; current_row++) {
+        select_row(current_row);
+        asm volatile ("nop"); asm volatile("nop");
+
+        debouncing_matrix_hand_offsetted[current_row] = optimized_col_reader();
+        // Unselect row
+        unselect_row(current_row);
+    }
+
+    update_debounce_counters(current_time);
+    transfer_matrix_values(current_time);
+
+    return 1;
+}
+
+
+// Get rows from other half over i2c
+int i2c_transaction(void) {
+    int slaveOffset = (isLeftHand) ? (ROWS_PER_HAND) : 0;
+
+    int err = i2c_master_start(SLAVE_I2C_ADDRESS + I2C_WRITE);
+    if (err) goto i2c_error;
+
+    // start of matrix stored at 0x00
+    err = i2c_master_write(I2C_KEYMAP_START);
+    if (err) goto i2c_error;
+
+    // Start read
+    err = i2c_master_start(SLAVE_I2C_ADDRESS + I2C_READ);
+    if (err) goto i2c_error;
+
+    if (!err) {
+        int i;
+        for (i = 0; i < ROWS_PER_HAND-1; ++i) {
+            matrix[slaveOffset+i] = i2c_master_read(I2C_ACK);
+        }
+        matrix[slaveOffset+i] = i2c_master_read(I2C_NACK);
+        i2c_master_stop();
+    } else {
+i2c_error: // the cable is disconnceted, or something else went wrong
+        i2c_reset_state();
+        return err;
+    }
+
+    return 0;
+}
+
+uint8_t matrix_scan(void)
+{    
+#ifdef DEBUG_MATRIX_SCAN_RATE
+    matrix_check_scan_rate();
+    matrix_time_between_scans();
+#endif        
+    uint8_t ret = _matrix_scan();
+   
+    if( i2c_transaction() ) {
+        // turn on the indicator led when halves are disconnected
+        TXLED1;
+
+        error_count++;
+
+        if (error_count > ERROR_DISCONNECT_COUNT) {
+            // reset other half if disconnected
+            int slaveOffset = (isLeftHand) ? (ROWS_PER_HAND) : 0;
+            for (int i = 0; i < ROWS_PER_HAND; ++i) {
+                matrix[slaveOffset+i] = 0;
+            }
+        }
+    } else {
+        // turn off the indicator led on no error
+        TXLED0;
+        error_count = 0;
+    }
+    matrix_scan_quantum();
+    return ret;
+}
+
+void matrix_slave_scan(void) {
+    _matrix_scan();
+
+    int offset = (isLeftHand) ? 0 : ROWS_PER_HAND;
+
+    for (int i = 0; i < ROWS_PER_HAND; ++i) {
+        i2c_slave_buffer[I2C_KEYMAP_START+i] = matrix[offset+i];
+    }
+
+    matrix_slave_scan_user();
+}
+
+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)
+{
+    return matrix[row];
+}
+
+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;
+}
+
+static void init_cols(void)
+{
+    for(uint8_t x = 0; x < MATRIX_COLS; x++) {
+        uint8_t pin = col_pins[x];
+        _SFR_IO8((pin >> 4) + 1) &= ~_BV(pin & 0xF); // IN
+        _SFR_IO8((pin >> 4) + 2) |=  _BV(pin & 0xF); // HI
+    }
+}
+
+inline 
+static matrix_row_t optimized_col_reader(void) {
+    //MATRIX_COL_PINS { B6, B2, B3, B1, F7, F6, F5, F4 }
+    return (PINB & (1 << 6) ? 0 : (ROW_SHIFTER << 0)) |
+          (PINB & (1 << 2) ? 0 : (ROW_SHIFTER << 1)) |
+          (PINB & (1 << 3) ? 0 : (ROW_SHIFTER << 2)) |
+          (PINB & (1 << 1) ? 0 : (ROW_SHIFTER << 3)) |
+          (PINF & (1 << 7) ? 0 : (ROW_SHIFTER << 4)) |
+          (PINF & (1 << 6) ? 0 : (ROW_SHIFTER << 5)) |
+          (PINF & (1 << 5) ? 0 : (ROW_SHIFTER << 6)) |
+          (PINF & (1 << 4) ? 0 : (ROW_SHIFTER << 7));
+}
+
+
+static void select_row(uint8_t row)
+{
+    uint8_t pin = 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)
+{
+    uint8_t pin = row_pins[row];
+    _SFR_IO8((pin >> 4) + 1) &= ~_BV(pin & 0xF); // IN
+    _SFR_IO8((pin >> 4) + 2) |=  _BV(pin & 0xF); // HI
+}
+
+static void unselect_rows(void)
+{
+    for(uint8_t x = 0; x < ROWS_PER_HAND; x++) {
+        uint8_t pin = row_pins[x];
+        _SFR_IO8((pin >> 4) + 1) &= ~_BV(pin & 0xF); // IN
+        _SFR_IO8((pin >> 4) + 2) |=  _BV(pin & 0xF); // HI
+    }
+}
+