Port DIRECT_PINS from split_common/matrix.c to matrix.c (#5091)

* Port DIRECT_PINS from split_common/matrix.c to matrix.c

* Reorder matrix.c to remove foward declaration and match split_common/matrix.c

* Refactor nano to use DIRECT_PINS

* Reorder matrix.c to remove foward declaration and match split_common/matrix.c

* Add DIRECT_PINS documentation

* Reorder matrix.c to remove foward declaration and match split_common/matrix.c - fix logic from inherited from split_common

* Add DIRECT_PINS documentation - review comments

4 files changed, 25 insertions, 169 deletions

diff --git a/keyboards/40percentclub/nano/config.h b/keyboards/40percentclub/nano/config.h
index 36840d2f6c..5eb65c74ad 100644
--- a/keyboards/40percentclub/nano/config.h
+++ b/keyboards/40percentclub/nano/config.h
@@ -31,12 +31,29 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 #define MATRIX_ROWS 2
 #define MATRIX_COLS 4
 
+/*
+ * Keyboard Matrix Assignments
+ *
+ * Change this to how you wired your keyboard
+ * COLS: AVR pins used for columns, left to right
+ * ROWS: AVR pins used for rows, top to bottom
+ * DIODE_DIRECTION: COL2ROW = COL = Anode (+), ROW = Cathode (-, marked on diode)
+ *                  ROW2COL = ROW = Anode (+), COL = Cathode (-, marked on diode)
+ *                  NO_DIODE = switches are directly connected to AVR pins
+ *
+*/
+// #define MATRIX_ROW_PINS { D0, D5 }
+// #define MATRIX_COL_PINS { F1, F0, B0 }
+#define DIRECT_PINS {   \
+    { F4, F5, F6, F7 }, \
+    { D1, D0, D4, C6 }, \
+}
+#define UNUSED_PINS
+
+/* COL2ROW, ROW2COL, or CUSTOM_MATRIX */
+//#define DIODE_DIRECTION CUSTOM_MATRIX
+
 /* ws2812 RGB LED */
 #define RGB_DI_PIN D3
 #define RGBLIGHT_ANIMATIONS
 #define RGBLED_NUM 6    // Number of LEDs
-
-/* COL2ROW or ROW2COL */
-#define DIODE_DIRECTION COL2ROW
-
-#define TAPPING_TERM 200
diff --git a/keyboards/40percentclub/nano/matrix.c b/keyboards/40percentclub/nano/matrix.c
deleted file mode 100644
index fa2461af5f..0000000000
--- a/keyboards/40percentclub/nano/matrix.c
+++ /dev/null
@@ -1,159 +0,0 @@
-/*
-
-Note for ErgoDox EZ customizers: Here be dragons!
-This is not a file you want to be messing with.
-All of the interesting stuff for you is under keymaps/ :)
-Love, Erez
-
-Copyright 2013 Oleg Kostyuk <cub.uanic@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 <util/delay.h>
-#include "action_layer.h"
-#include "print.h"
-#include "debug.h"
-#include "util.h"
-#include "matrix.h"
-#include "nano.h"
-#include <string.h>
-
-/* matrix state(1:on, 0:off) */
-static matrix_row_t matrix[MATRIX_ROWS];
-static matrix_row_t matrix_stage[MATRIX_ROWS];
-static matrix_row_t matrix_debouncing[MATRIX_ROWS];
-
-static uint16_t debouncing_time;
-static bool debouncing = false;
-
-__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) {
-}
-
-inline
-uint8_t matrix_rows(void)
-{
-    return MATRIX_ROWS;
-}
-
-inline
-uint8_t matrix_cols(void)
-{
-    return MATRIX_COLS;
-}
-
-void matrix_init(void)
-{
-
-    DDRF  &= ~(1<<4 | 1<<5 | 1<<6 | 1<<7);
-    PORTF |=  (1<<4 | 1<<5 | 1<<6 | 1<<7);
-    DDRC  &= ~(1<<6);
-    PORTC |=  (1<<6);
-    DDRD  &= ~(1<<0 | 1<<1 | 1<<4);
-    PORTD |=  (1<<0 | 1<<1 | 1<<4);
-
-    for (uint8_t i = 0; i < MATRIX_ROWS; i++) {
-        matrix[i] = 0;
-        matrix_debouncing[i] = 0;
-        matrix_stage[i] = 0;
-    }
-
-    matrix_init_quantum();
-
-}
-
-uint8_t matrix_scan(void)
-{
-    matrix_stage[0] =
-        (PINF&(1<<4) ? 0 : (1<<0)) |
-        (PINF&(1<<5) ? 0 : (1<<1)) |
-        (PINF&(1<<6) ? 0 : (1<<2)) |
-        (PINF&(1<<7) ? 0 : (1<<3));
-    matrix_stage[1] =
-        (PIND&(1<<1) ? 0 : (1<<0)) |
-        (PIND&(1<<0) ? 0 : (1<<1)) |
-        (PIND&(1<<4) ? 0 : (1<<2)) |
-        (PINC&(1<<6) ? 0 : (1<<3));
-
-    if (memcmp(matrix_debouncing, matrix_stage, sizeof(matrix)) != 0) {
-        debouncing = true;
-        debouncing_time = timer_read();
-    }
-
-    matrix_debouncing[0] = matrix_stage[0];
-    matrix_debouncing[1] = matrix_stage[1];
-
-    if (debouncing && (timer_elapsed(debouncing_time) > 20)) {
-        for (uint8_t i = 0; i < MATRIX_ROWS; i++) {
-            matrix[i] = matrix_debouncing[i];
-        }
-        debouncing = false;
-    }
-
-    matrix_scan_quantum();
-
-    return 1;
-}
-
-bool matrix_is_modified(void)
-{
-    return true;
-}
-
-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)
-{
-}
-
-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;
-}
-
diff --git a/keyboards/40percentclub/nano/nano.h b/keyboards/40percentclub/nano/nano.h
index ae297ac12e..881309738b 100644
--- a/keyboards/40percentclub/nano/nano.h
+++ b/keyboards/40percentclub/nano/nano.h
@@ -2,10 +2,12 @@
 
 #include "quantum.h"
 
-#define LAYOUT( \
+#define LAYOUT_ortho_2x4( \
     k01, k02, k03, k04, \
     k05, k06, k07, k08  \
   ) { \
     { k01, k02, k03, k04 }, \
     { k05, k06, k07, k08 } \
 }
+
+#define LAYOUT LAYOUT_ortho_2x4 
diff --git a/keyboards/40percentclub/nano/rules.mk b/keyboards/40percentclub/nano/rules.mk
index 66ad3ffc66..e3c97e0d44 100644
--- a/keyboards/40percentclub/nano/rules.mk
+++ b/keyboards/40percentclub/nano/rules.mk
@@ -76,7 +76,3 @@ RGBLIGHT_ENABLE = yes       # Enable WS2812 RGB underlight.
 
 # Do not enable SLEEP_LED_ENABLE. it uses the same timer as BACKLIGHT_ENABLE
 SLEEP_LED_ENABLE = no    # Breathing sleep LED during USB suspend
-
-# custom matrix setup
-SRC = matrix.c
-CUSTOM_MATRIX = yes