relocate 40percent.club boards to new parent folder (#4380)

* Initial move of 40percent.club boards to common parent folder.

* Refactor readme files to be consistent

* Refactor readme files to be consistent - fix make command examples.

* Refactor readme files to be consistent - align readme filenames.

* Refactor readme files to be consistent - fix repo url.

* Disable Community keymap builds as they are currently failing due to missing functionality

* Move more of 40percent.club boards to common parent folder.

* Refactor readme files to be consistent - align readme filenames.

* Refactor readme files to be consistent - fix make command examples.

1 files changed, 159 insertions, 0 deletions

diff --git a/keyboards/40percentclub/nano/matrix.c b/keyboards/40percentclub/nano/matrix.c
new file mode 100644
index 0000000000..fa2461af5f
--- /dev/null
+++ b/keyboards/40percentclub/nano/matrix.c
@@ -0,0 +1,159 @@
+/*
+
+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;
+}
+