1 files changed, 86 insertions, 0 deletions

diff --git a/keyboards/bpiphany/frosty_flake/20130602/matrix.c b/keyboards/bpiphany/frosty_flake/20130602/matrix.c
new file mode 100644
index 000000000..e0337f9ec
--- /dev/null
+++ b/keyboards/bpiphany/frosty_flake/20130602/matrix.c
@@ -0,0 +1,86 @@
+/*
+  Copyright 2017 Gabriel Young <[email protected]>
+
+  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<<2) ? 0 : ((matrix_row_t)1<<0)) |
+        (PIND&(1<<0) ? 0 : ((matrix_row_t)1<<1)) |
+        (PIND&(1<<1) ? 0 : ((matrix_row_t)1<<2)) |
+        (PINC&(1<<7) ? 0 : ((matrix_row_t)1<<3)) |
+        (PIND&(1<<5) ? 0 : ((matrix_row_t)1<<4)) |
+        (PIND&(1<<4) ? 0 : ((matrix_row_t)1<<5)) |
+        (PIND&(1<<2) ? 0 : ((matrix_row_t)1<<6)) |
+        (PIND&(1<<6) ? 0 : ((matrix_row_t)1<<7))
+    );
+}
+
+static void select_row(uint8_t row) {
+    switch (row) {
+        case  0: PORTB = (PORTB & ~0b01111110) | 0b00111010; break;
+        case  1: PORTB = (PORTB & ~0b01111110) | 0b01011000; break;
+        case  2: PORTB = (PORTB & ~0b01111110) | 0b01110000; break;
+        case  3: PORTB = (PORTB & ~0b01111110) | 0b01101110; break;
+        case  4: PORTB = (PORTB & ~0b01111110) | 0b01101100; break;
+        case  5: PORTB = (PORTB & ~0b01111110) | 0b01101010; break;
+        case  6: PORTB = (PORTB & ~0b01111110) | 0b01101000; break;
+        case  7: PORTB = (PORTB & ~0b01111110) | 0b01100100; break;
+        case  8: PORTB = (PORTB & ~0b01111110) | 0b01100000; break;
+        case  9: PORTB = (PORTB & ~0b01111110) | 0b01100010; break;
+        case 10: PORTB = (PORTB & ~0b01111110) | 0b00011010; break;
+        case 11: PORTB = (PORTB & ~0b01111110) | 0b00011000; break;
+        case 12: PORTB = (PORTB & ~0b01111110) | 0b00111100; break;
+        case 13: PORTB = (PORTB & ~0b01111110) | 0b01100110; break;
+        case 14: PORTB = (PORTB & ~0b01111110) | 0b00111000; break;
+        case 15: PORTB = (PORTB & ~0b01111110) | 0b01110010; break;
+        case 16: PORTB = (PORTB & ~0b01111110) | 0b00011110; break;
+        case 17: PORTB = (PORTB & ~0b01111110) | 0b00111110; break;
+    }
+}
+
+void matrix_init_custom(void) {
+    /* Column output pins */
+    DDRB  |=  0b01111110;
+    /* Row input pins */
+    DDRC  &= ~0b10000100;
+    DDRD  &= ~0b01110111;
+    PORTC |=  0b10000100;
+    PORTD |=  0b01110111;
+}
+
+// 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;
+}