[Keyboard] Bathroom Epiphanies Frosty Flake rev 20130602 (#15365)

* add optional support for Frosty Flake rev 20130602

* update documentation with instructions on building for rev 20130602

* support revisions using subfolders instead of preprocessor directives

* rules.mk cleanup

1 files changed, 0 insertions, 85 deletions

diff --git a/keyboards/bpiphany/frosty_flake/matrix.c b/keyboards/bpiphany/frosty_flake/matrix.c
deleted file mode 100644
index 4517c7af5b..0000000000
--- a/keyboards/bpiphany/frosty_flake/matrix.c
+++ /dev/null
@@ -1,85 +0,0 @@
-/*
-  Copyright 2017 Gabriel Young <gabeplaysdrums@live.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 <util/delay.h>
-#include "matrix.h"
-
-static matrix_row_t scan_col(void) {
-    // Each of the 8 columns is read off pins as below
-    //   7  6  5  4  3  2  1  0
-    // ,--,--,--,--,--,--,--,--,
-    // |B0|B3|B2|B1|B6|B4|B5|C7|
-    // `--`--`--`--`--`--`--`--`
-    return (
-        (PINC&(1<<7) ? 0 : ((matrix_row_t)1<<0)) |
-        (PINB&(1<<5) ? 0 : ((matrix_row_t)1<<1)) |
-        (PINB&(1<<4) ? 0 : ((matrix_row_t)1<<2)) |
-        (PINB&(1<<6) ? 0 : ((matrix_row_t)1<<3)) |
-        (PINB&(1<<1) ? 0 : ((matrix_row_t)1<<4)) |
-        (PINB&(1<<2) ? 0 : ((matrix_row_t)1<<5)) |
-        (PINB&(1<<3) ? 0 : ((matrix_row_t)1<<6)) |
-        (PINB&(1<<0) ? 0 : ((matrix_row_t)1<<7))
-    );
-}
-
-static void select_row(uint8_t row) {
-    switch (row) {
-        case  0: PORTD = (PORTD & ~0b01111011) | 0b00011011; break;
-        case  1: PORTD = (PORTD & ~0b01111011) | 0b01000011; break;
-        case  2: PORTD = (PORTD & ~0b01111011) | 0b01101010; break;
-        case  3: PORTD = (PORTD & ~0b01111011) | 0b01111001; break;
-        case  4: PORTD = (PORTD & ~0b01111011) | 0b01100010; break;
-        case  5: PORTD = (PORTD & ~0b01111011) | 0b01110001; break;
-        case  6: PORTD = (PORTD & ~0b01111011) | 0b01100001; break;
-        case  7: PORTD = (PORTD & ~0b01111011) | 0b01110000; break;
-        case  8: PORTD = (PORTD & ~0b01111011) | 0b01100000; break;
-        case  9: PORTD = (PORTD & ~0b01111011) | 0b01101000; break;
-        case 10: PORTD = (PORTD & ~0b01111011) | 0b00101011; break;
-        case 11: PORTD = (PORTD & ~0b01111011) | 0b00110011; break;
-        case 12: PORTD = (PORTD & ~0b01111011) | 0b00100011; break;
-        case 13: PORTD = (PORTD & ~0b01111011) | 0b01111000; break;
-        case 14: PORTD = (PORTD & ~0b01111011) | 0b00010011; break;
-        case 15: PORTD = (PORTD & ~0b01111011) | 0b01101001; break;
-        case 16: PORTD = (PORTD & ~0b01111011) | 0b00001011; break;
-        case 17: PORTD = (PORTD & ~0b01111011) | 0b00111011; break;
-    }
-}
-
-void matrix_init_custom(void) {
-    /* Row output pins */
-    DDRD  |=  0b01111011;
-    /* Column input pins */
-    DDRC  &= ~0b10000000;
-    DDRB  &= ~0b01111111;
-    PORTC |=  0b10000000;
-    PORTB |=  0b01111111;
-}
-
-// matrix is 18 uint8_t.
-// we select the row (one of 18), then read the column
-bool matrix_scan_custom(matrix_row_t current_matrix[]) {
-	bool has_changed = false;
-    for (uint8_t row = 0; row < MATRIX_ROWS; row++) {
-        matrix_row_t orig = current_matrix[row];
-        select_row(row);
-        _delay_us(3);
-        current_matrix[row] = scan_col();
-        has_changed |= (orig != current_matrix[row]);
-    }
-
-    return has_changed;
-}