From 41d5d3e6558d2b25680a66ba79e12bd9f1577328 Mon Sep 17 00:00:00 2001
From: Rasmus Schults <rasmusx@gmail.com>
Date: Thu, 30 Nov 2017 01:50:03 +0200
Subject: Add Lightsaver V3 keyboard

---
 keyboards/lightsaver/matrix.c | 284 ++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 284 insertions(+)
 create mode 100644 keyboards/lightsaver/matrix.c

(limited to 'keyboards/lightsaver/matrix.c')

diff --git a/keyboards/lightsaver/matrix.c b/keyboards/lightsaver/matrix.c
new file mode 100644
index 0000000000..cb7b38fd4b
--- /dev/null
+++ b/keyboards/lightsaver/matrix.c
@@ -0,0 +1,284 @@
+/*
+Copyright 2016-2017 Ralf Schmitt <ralf@bunkertor.net> Rasmus Schults <rasmusx@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/>.
+*/
+
+#include <util/delay.h>
+#include <avr/io.h>
+#include <stdio.h>
+#include "matrix.h"
+#include "util.h"
+#include "print.h"
+#include "debug.h"
+
+static uint8_t debouncing = DEBOUNCING_DELAY;
+
+/* matrix state(1:on, 0:off) */
+static matrix_row_t matrix[MATRIX_ROWS];
+static matrix_row_t matrix_debouncing[MATRIX_ROWS];
+
+static uint8_t read_rows(void);
+static uint8_t read_fwkey(void);
+static void init_rows(void);
+static void unselect_cols(void);
+static void select_col(uint8_t col);
+
+__attribute__ ((weak))
+void matrix_init_quantum(void) {
+    matrix_init_kb();
+}
+
+__attribute__ ((weak))
+void matrix_scan_quantum(void) {
+    matrix_scan_kb();
+}
+
+__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) {
+}
+
+void matrix_init(void) {
+  DDRD  |=  0b11010000;
+  PORTD &= ~0b01010000;
+  DDRB  |=  0b00011111;
+  PORTB &= ~0b00001110;
+  PORTB |=  0b00010001;
+  DDRE  |=  0b01000000;
+  PORTE &= ~0b01000000;
+
+  unselect_cols();
+  init_rows();
+
+  for (uint8_t i=0; i < MATRIX_ROWS; i++)  {
+    matrix[i] = 0;
+    matrix_debouncing[i] = 0;
+  }
+
+  matrix_init_quantum();
+}
+
+uint8_t matrix_scan(void) {
+  for (uint8_t col = 0; col < MATRIX_COLS; col++) {
+    select_col(col);
+    _delay_us(3);
+
+    uint8_t rows = read_rows();
+    if(col == 0) {
+      rows |= read_fwkey();
+    }
+    for (uint8_t row = 0; row < MATRIX_ROWS; row++) {
+      bool prev_bit = matrix_debouncing[row] & ((matrix_row_t)1<<col);
+      bool curr_bit = rows & (1<<row);
+      if (prev_bit != curr_bit) {
+        matrix_debouncing[row] ^= ((matrix_row_t)1<<col);
+        debouncing = DEBOUNCING_DELAY;
+      }
+    }
+    unselect_cols();
+  }
+
+  if (debouncing) {
+    if (--debouncing) {
+      _delay_ms(1);
+    } else {
+      for (uint8_t i = 0; i < MATRIX_ROWS; i++) {
+        matrix[i] = matrix_debouncing[i];
+      }
+    }
+  }
+
+  matrix_scan_quantum();
+  return 1;
+}
+
+inline matrix_row_t matrix_get_row(uint8_t row) {
+  return matrix[row];
+}
+
+void matrix_print(void) {
+  print("\nr/c 0123456789ABCDEF\n");
+  for (uint8_t row = 0; row < MATRIX_ROWS; row++) {
+    xprintf("%02X: %032lb\n", row, bitrev32(matrix_get_row(row)));
+  }
+}
+
+/* Row pin configuration
+ * row: 0    1    2    3    4    5
+ * pin: PB7  PD0  PD1  PD2  PD3  PD5
+ *
+ * Esc uses its own pin PE2
+ */
+static void init_rows(void) {
+  DDRB  &= ~0b10000000;
+  PORTB &= ~0b10000000;
+
+  DDRD  &= ~0b00101111;
+  PORTD &= ~0b00101111;
+
+  DDRE  &= ~0b00000100;
+  PORTE |=  0b00000100;
+}
+
+static uint8_t read_rows() {
+  return (PINB&(1<<7) ? (1<<0) : 0) |
+    (PIND&(1<<0) ? (1<<1) : 0) |
+    (PIND&(1<<1) ? (1<<2) : 0) |
+    (PIND&(1<<2) ? (1<<3) : 0) |
+    (PIND&(1<<3) ? (1<<4) : 0) |
+    (PIND&(1<<5) ? (1<<5) : 0);
+}
+
+static uint8_t read_fwkey(void)
+{
+  return PINE&(1<<2) ? 0 : (1<<0);
+}
+
+/* Columns 0 - 15
+ * These columns uses two 74HC237D 3 to 8 bit demultiplexers.
+ * col / pin:    PC6  PB6  PF0  PF1  PC7
+ * 0:             1    0    0    0    0
+ * 1:             1    0    1    0    0
+ * 2:             1    0    0    1    0
+ * 3:             1    0    1    1    0
+ * 4:             1    0    0    0    1
+ * 5:             1    0    1    0    1
+ * 6:             1    0    0    1    1
+ * 7:             1    0    1    1    1
+ * 8:             0    1    0    0    0
+ * 9:             0    1    1    0    0
+ * 10:            0    1    0    1    0
+ * 11:            0    1    1    1    0
+ * 12:            0    1    0    0    1
+ * 13:            0    1    1    0    1
+ * 14:            0    1    0    1    1
+ * 15:            0    1    1    1    1
+ *
+ * col: 16
+ * pin: PB5
+ *
+ * col: 17
+ * pin: PB4
+ *
+ * col: 18
+ * pin: PD7
+ */
+static void unselect_cols(void) {
+  DDRB  |=  0b01110000;
+  PORTB &= ~0b01110000;
+
+  DDRC |= (1<<6) | (1<<7);
+  PORTC &= ~((1<<6) | (1<<7));
+
+  DDRF |= (1<<0) | (1<<1);
+  PORTF &= ~((1<<0) | (1<<1));
+
+  DDRD |= (1<<7);
+  PORTD &= ~(1<<7);
+}
+
+static void select_col(uint8_t col) {
+  switch (col) {
+    case 0:
+      PORTC |= (1<<6);
+      break;
+    case 1:
+      PORTC |= (1<<6);
+      PORTF |= (1<<0);
+      break;
+    case 2:
+      PORTC |= (1<<6);
+      PORTF |= (1<<1);
+      break;
+    case 3:
+      PORTC |= (1<<6);
+      PORTF |= (1<<0) | (1<<1);
+      break;
+    case 4:
+      PORTC |= (1<<6);
+      PORTC |= (1<<7);
+      break;
+    case 5:
+      PORTC |= (1<<6);
+      PORTF |= (1<<0);
+      PORTC |= (1<<7);
+      break;
+    case 6:
+      PORTC |= (1<<6);
+      PORTF |= (1<<1);
+      PORTC |= (1<<7);
+      break;
+    case 7:
+      PORTC |= (1<<6);
+      PORTF |= (1<<0) | (1<<1);
+      PORTC |= (1<<7);
+      break;
+    case 8:
+      PORTB |= (1<<6);
+      break;
+    case 9:
+      PORTB |= (1<<6);
+      PORTF |= (1<<0);
+      break;
+    case 10:
+      PORTB |= (1<<6);
+      PORTF |= (1<<1);
+      break;
+    case 11:
+      PORTB |= (1<<6);
+      PORTF |= (1<<0) | (1<<1);
+      break;
+    case 12:
+      PORTB |= (1<<6);
+      PORTC |= (1<<7);
+      break;
+    case 13:
+      PORTB |= (1<<6);
+      PORTF |= (1<<0);
+      PORTC |= (1<<7);
+      break;
+    case 14:
+      PORTB |= (1<<6);
+      PORTF |= (1<<1);
+      PORTC |= (1<<7);
+      break;
+    case 15:
+      PORTB |= (1<<6);
+      PORTF |= (1<<0) | (1<<1);
+      PORTC |= (1<<7);
+      break;
+    case 16:
+      PORTB |= (1<<5);
+      break;
+    case 17:
+      PORTB |= (1<<4);
+      break;
+    case 18:
+      PORTD |= (1<<7);
+      break;
+  }
+}
-- 
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