Update to xealousbrown. (#8215)

* Update to xealousbrown.

5-13ms Latency decrease, 4x scan rate improvement.
(CUSTOM_MATRIX = lite) is a really great feature!

* Updated Readme.md, added an extra speedhack.

* More optimizations

* Update keyboards/handwired/xealousbrown/rules.mk

* Update keyboards/handwired/xealousbrown/rules.mk

6 files changed, 188 insertions, 16 deletions

diff --git a/keyboards/handwired/xealousbrown/README.md b/keyboards/handwired/xealousbrown/README.md
index e6092ebb05..970f9444c4 100644
--- a/keyboards/handwired/xealousbrown/README.md
+++ b/keyboards/handwired/xealousbrown/README.md
@@ -7,5 +7,11 @@ https://sites.google.com/site/xaelous/keyboards/handwired-keyboard
 
 Make example for this keyboard (after setting up your build environment):
 
-    make handwired/xealous-brown:default
+    make handwired/xealousbrown:default
 
+
+The brief list of speedhacks to make this keyboard blazing fast:
+1) bit-bash implementation of scanning rows, columns. Very short delay between pin waiting.
+2) Compiling with a few extra flags
+3) Eager-per-key Debouncing algorithm (no 5ms delay before message is sent)
+4) 1000hz polling
diff --git a/keyboards/handwired/xealousbrown/config.h b/keyboards/handwired/xealousbrown/config.h
index 17aa6c94ee..bf15637a4d 100644
--- a/keyboards/handwired/xealousbrown/config.h
+++ b/keyboards/handwired/xealousbrown/config.h
@@ -29,7 +29,10 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 /* key matrix size */
 #define MATRIX_ROWS 5
 #define MATRIX_COLS 13
-
+#define DEBOUNCE 10
+#define USB_POLLING_INTERVAL_MS 1
+/* layer optimization */
+#define LAYER_STATE_8BIT
 /*
  * Keyboard Matrix Assignments
  *
diff --git a/keyboards/handwired/xealousbrown/keymaps/default/keymap.c b/keyboards/handwired/xealousbrown/keymaps/default/keymap.c
index 6597c56673..908e54133c 100644
--- a/keyboards/handwired/xealousbrown/keymaps/default/keymap.c
+++ b/keyboards/handwired/xealousbrown/keymaps/default/keymap.c
@@ -10,8 +10,8 @@ const uint16_t PROGMEM keymaps[][MATRIX_ROWS][MATRIX_COLS] = {
   ),
   [1] = LAYOUT( /* FN_Layer */
       KC_GRV,        KC_F1,   KC_F2,   KC_F3,    KC_F4,    KC_F5,    KC_F6,    KC_F7,    KC_F8,    KC_F9,    KC_F10,    KC_F11, KC_F12, \
-      KC_CAPS,       KC_TRNS, KC_UP,   KC_TRNS,  KC_TRNS,  KC_TRNS,  KC_TRNS,  KC_PGUP,  KC_UP,    KC_PGDN,  KC_PSCR,   KC_SLCK,KC_PAUS,\
-      KC_TRNS,       KC_LEFT, KC_DOWN, KC_RGHT,  KC_TRNS,  KC_TRNS,  KC_HOME,  KC_LEFT,  KC_DOWN,  KC_RGHT,  KC_INS,    KC_DEL, KC_TRNS, \
+      KC_CAPS,       KC_PGUP, KC_UP,   KC_PGDN,  KC_TRNS,  KC_TRNS,  KC_TRNS,  KC_PGUP,  KC_UP,    KC_PGDN,  KC_PSCR,   KC_SLCK,KC_PAUS,\
+      KC_TRNS,       KC_LEFT, KC_DOWN, KC_RGHT,  KC_TRNS,  KC_HOME,  KC_HOME,  KC_LEFT,  KC_DOWN,  KC_RGHT,  KC_INS,    KC_DEL, KC_TRNS, \
       KC_TRNS,       KC_TRNS, KC_TRNS, KC_TRNS,  KC_TRNS,  KC_TRNS,  KC_END,   KC_TRNS,  KC_VOLD,  KC_VOLU,  KC_MUTE,   KC_TRNS,KC_TRNS,
       KC_TRNS,       KC_TRNS, KC_TRNS,                 KC_TRNS,      KC_TRNS,  KC_TRNS,  KC_TRNS,  KC_TRNS,                     KC_DEL    \
   )
diff --git a/keyboards/handwired/xealousbrown/matrix.c b/keyboards/handwired/xealousbrown/matrix.c
new file mode 100644
index 0000000000..cce0d06ebb
--- /dev/null
+++ b/keyboards/handwired/xealousbrown/matrix.c
@@ -0,0 +1,112 @@
+/*
+Copyright 2019 Alex Ong
+
+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 "util.h"
+#include "matrix.h"
+#include "debounce.h"
+#include "quantum.h"
+
+/* matrix state(1:on, 0:off) */
+extern matrix_row_t raw_matrix[MATRIX_ROWS];  // raw values
+extern matrix_row_t matrix[MATRIX_ROWS];      // debounced values
+
+// matrix code
+// super fast read_cols code.
+static matrix_row_t read_cols(void) {
+    return (PINC & (1 << 6) ? 0 : (1UL << 0)) |
+           (PIND & (1 << 7) ? 0 : (1UL << 1)) |
+           (PINE & (1 << 6) ? 0 : (1UL << 2)) |
+           (PINB & (1 << 4) ? 0 : (1UL << 3)) |
+           (PINB & (1 << 5) ? 0 : (1UL << 4)) |
+           (PINB & (1 << 6) ? 0 : (1UL << 5)) |
+           (PINB & (1 << 2) ? 0 : (1UL << 6)) |
+           (PINB & (1 << 3) ? 0 : (1UL << 7)) |
+           (PINB & (1 << 1) ? 0 : (1UL << 8)) |
+           (PINF & (1 << 7) ? 0 : (1UL << 9)) |
+           (PINF & (1 << 6) ? 0 : (1UL << 10)) |
+           (PINF & (1 << 5) ? 0 : (1UL << 11)) |
+           (PINF & (1 << 4) ? 0 : (1UL << 12));
+}
+
+static void unselect_rows(void) {
+    DDRD &= ~0b00011111;
+    PORTD &= ~0b00011111;
+}
+
+static void select_row(uint8_t row) {
+    switch (row) {
+        case 0:
+            DDRD |= (1 << 3);
+            PORTD &= ~(1 << 3);
+            break;
+        case 1:
+            DDRD |= (1 << 2);
+            PORTD &= ~(1 << 2);
+            break;
+        case 2:
+            DDRD |= (1 << 1);
+            PORTD &= ~(1 << 1);
+            break;
+        case 3:
+            DDRD |= (1 << 0);
+            PORTD &= ~(1 << 0);
+            break;
+        case 4:
+            DDRD |= (1 << 4);
+            PORTD &= ~(1 << 4);
+            break;
+    }
+}
+
+static void init_pins(void) {
+    DDRC &= ~(1 << 6);
+    PORTC |= (1 << 6);
+    DDRD &= ~(1 << 7);
+    PORTD |= (1 << 7);
+    DDRE &= ~(1 << 6);
+    PORTE |= (1 << 6);
+    DDRB &= ~(1 << 4 | 1 << 5 | 1 << 6 | 1 << 2 | 1 << 3 | 1 << 1);
+    PORTB |= (1 << 4 | 1 << 5 | 1 << 6 | 1 << 2 | 1 << 3 | 1 << 1);
+    DDRF &= ~(1 << 7 | 1 << 6 | 1 << 5 | 1 << 4);
+    PORTF |= (1 << 7 | 1 << 6 | 1 << 5 | 1 << 4);
+}
+
+// Only need to init the pins. Debounce / raw matrix are initialized already for us.
+void matrix_init_custom(void) {
+    // initialize key pins
+    init_pins();
+}
+
+// Only need to scan the result into current_matrix, and return changed.
+uint8_t matrix_scan_custom(matrix_row_t current_matrix[]) {
+    bool changed = false;
+
+    // Set row, read cols
+    for (uint8_t current_row = 0; current_row < MATRIX_ROWS; current_row++) {
+        select_row(current_row);
+        asm volatile("nop");
+        asm volatile("nop");
+        matrix_row_t cols = read_cols();
+        changed |= (current_matrix[current_row] != cols);
+        current_matrix[current_row] = cols;
+        unselect_rows();
+    }
+
+    return changed;
+}
diff --git a/keyboards/handwired/xealousbrown/rules.mk b/keyboards/handwired/xealousbrown/rules.mk
index c346ef6c98..8876635800 100644
--- a/keyboards/handwired/xealousbrown/rules.mk
+++ b/keyboards/handwired/xealousbrown/rules.mk
@@ -14,17 +14,27 @@ BOOTLOADER = caterina
 # Build Options
 #   change yes to no to disable
 #
-BOOTMAGIC_ENABLE = no      # Virtual DIP switch configuration(+1000)
-MOUSEKEY_ENABLE = no       # Mouse keys(+4700)
-EXTRAKEY_ENABLE = yes       # Audio control and System control(+450)
-CONSOLE_ENABLE = yes        # Console for debug(+400)
-COMMAND_ENABLE = yes        # Commands for debug and configuration
+BOOTMAGIC_ENABLE = full             # Virtual DIP switch configuration
+MOUSEKEY_ENABLE = no                # Mouse keys
+EXTRAKEY_ENABLE = yes               # Audio control and System control
+CONSOLE_ENABLE = yes                # Console for debug
+COMMAND_ENABLE = yes                 # Commands for debug and configuration
 # Do not enable SLEEP_LED_ENABLE. it uses the same timer as BACKLIGHT_ENABLE
-SLEEP_LED_ENABLE = no       # Breathing sleep LED during USB suspend
+SLEEP_LED_ENABLE = no               # Breathing sleep LED during USB suspend
 # if this doesn't work, see here: https://github.com/tmk/tmk_keyboard/wiki/FAQ#nkro-doesnt-work
-NKRO_ENABLE = yes            # USB Nkey Rollover
-BACKLIGHT_ENABLE = no       # Enable keyboard backlight functionality on B7 by default
-MIDI_ENABLE = no            # MIDI controls
-UNICODE_ENABLE = no         # Unicode
-BLUETOOTH_ENABLE = no       # Enable Bluetooth with the Adafruit EZ-Key HID
-AUDIO_ENABLE = no           # Audio output on port C6
+NKRO_ENABLE = yes                   # USB Nkey Rollover
+BACKLIGHT_ENABLE = no               # Enable keyboard backlight functionality on B7 by default
+MIDI_ENABLE = no                    # MIDI controls
+UNICODE_ENABLE = no                 # Unicode
+BLUETOOTH_ENABLE = no               # Enable Bluetooth with the Adafruit EZ-Key HID
+AUDIO_ENABLE = no                   # Audio output on port C6
+SPACE_CADET_ENABLE = no             # Unneeded feature.
+
+
+# special sauce for this keyboard
+DEBOUNCE_TYPE = eager_pk            # Debounce using eager_pk.
+CUSTOM_MATRIX = lite                # Custom matrix that polls at 7000hz instead of a measly 2000hz.
+LTO_ENABLE = yes                    # smaller binary
+SRC += matrix.c
+
+# Also remember to open tmk's rules.mk and set compilation optimization to 3
diff --git a/keyboards/handwired/xealousbrown/xealousbrown.c b/keyboards/handwired/xealousbrown/xealousbrown.c
index 5c8e2fb18a..39def8ade4 100644
--- a/keyboards/handwired/xealousbrown/xealousbrown.c
+++ b/keyboards/handwired/xealousbrown/xealousbrown.c
@@ -6,3 +6,44 @@ void matrix_init_kb(void) {
 
 	matrix_init_user();
 }
+
+
+
+#ifdef BENCHMARK_MATRIX
+#    include "timer.h"
+#    include <stdint.h>
+#    include <stdbool.h>
+#    include "wait.h"
+#    include "util.h"
+#    include "matrix.h"
+#    include "quantum.h"
+
+static int      scans          = 0;
+static uint16_t last_print_out = 0;
+static int      last_timer     = 0;
+void            matrix_scan_user(void) {
+    scans++;
+    uint16_t timer = timer_read();
+    
+    if (timer != last_timer && timer != last_timer + 1) {
+        print("MS:\n");
+        print_dec(timer);
+        print("->");
+        print_dec(last_timer);
+        print("\n");
+    }
+    
+    last_timer = timer;
+    if ((timer % 1000 == 0) && (timer != last_print_out)) {
+        print("Benchmark:");
+        print("\n");
+        print_dec(timer);
+        print("\n");
+        print_dec(scans);
+        print("\n");
+        print("-------");
+        scans          = 0;
+        last_print_out = timer;
+    }
+}
+#endif