From a296c83805c051ee0f416f11ded6124fac402579 Mon Sep 17 00:00:00 2001
From: Jack Humbert <jack.humb@gmail.com>
Date: Mon, 16 Mar 2015 11:59:21 -0400
Subject: [PATCH] Create handwire-matrix.c

---
 keyboard/planck/handwire-matrix.c | 193 ++++++++++++++++++++++++++++++
 1 file changed, 193 insertions(+)
 create mode 100644 keyboard/planck/handwire-matrix.c

diff --git a/keyboard/planck/handwire-matrix.c b/keyboard/planck/handwire-matrix.c
new file mode 100644
index 000000000..2f2dbdb10
--- /dev/null
+++ b/keyboard/planck/handwire-matrix.c
@@ -0,0 +1,193 @@
+/*
+Copyright 2012 Jun Wako 
+Generated by planckkeyboard.com (2014 Jack Humbert)
+
+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 "print.h"
+#include "debug.h"
+#include "util.h"
+#include "matrix.h"
+
+
+#ifndef DEBOUNCE
+#   define DEBOUNCE 10
+#endif
+static uint8_t debouncing = DEBOUNCE;
+
+/* matrix state(1:on, 0:off) */
+static matrix_row_t matrix[MATRIX_ROWS];
+static matrix_row_t matrix_debouncing[MATRIX_ROWS];
+
+static matrix_row_t read_cols(void);
+static void init_cols(void);
+static void unselect_rows(void);
+static void select_row(uint8_t row);
+
+inline
+uint8_t matrix_rows(void)
+{
+    return MATRIX_ROWS;
+}
+
+inline
+uint8_t matrix_cols(void)
+{
+    return MATRIX_COLS;
+}
+
+void matrix_init(void)
+{
+    // initialize row and col
+    unselect_rows();
+    init_cols();
+
+    // initialize matrix state: all keys off
+    for (uint8_t i=0; i < MATRIX_ROWS; i++) {
+        matrix[i] = 0;
+        matrix_debouncing[i] = 0;
+    }
+}
+
+uint8_t matrix_scan(void)
+{
+    for (uint8_t i = 0; i < MATRIX_ROWS; i++) {
+        select_row(i);
+        _delay_us(30);  // without this wait read unstable value.
+        matrix_row_t cols = read_cols();
+        if (matrix_debouncing[i] != cols) {
+            matrix_debouncing[i] = cols;
+            if (debouncing) {
+                debug("bounce!: "); debug_hex(debouncing); debug("\n");
+            }
+            debouncing = DEBOUNCE;
+        }
+        unselect_rows();
+    }
+
+    if (debouncing) {
+        if (--debouncing) {
+            _delay_ms(1);
+        } else {
+            for (uint8_t i = 0; i < MATRIX_ROWS; i++) {
+                matrix[i] = matrix_debouncing[i];
+            }
+        }
+    }
+
+    return 1;
+}
+
+bool matrix_is_modified(void)
+{
+    if (debouncing) return false;
+    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)
+{
+    print("\nr/c 0123456789ABCDEF\n");
+    for (uint8_t row = 0; row < MATRIX_ROWS; row++) {
+        phex(row); print(": ");
+        pbin_reverse16(matrix_get_row(row));
+        print("\n");
+    }
+}
+
+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;
+}
+
+static void init_cols(void)
+{
+    DDRB &= ~(1<<6 | 1<<5 | 1<<4);
+    PORTB |= (1<<6 | 1<<5 | 1<<4);
+    DDRD &= ~(1<<7 | 1<<6 | 1<<4);
+    PORTD |= (1<<7 | 1<<6 | 1<<4);
+    DDRF &= ~(1<<0 | 1<<1 | 1<<4 | 1<<5 | 1<<6 | 1<<7);
+    PORTF |= (1<<0 | 1<<1 | 1<<4 | 1<<5 | 1<<6 | 1<<7);
+    
+}
+
+static matrix_row_t read_cols(void)
+{
+  return (PIND&(1<<4) ? 0 : (1<<0)) |
+         (PIND&(1<<6) ? 0 : (1<<1)) |
+         (PIND&(1<<7) ? 0 : (1<<2)) |
+         (PINB&(1<<4) ? 0 : (1<<3)) |
+         (PINB&(1<<5) ? 0 : (1<<4)) |
+         (PINB&(1<<6) ? 0 : (1<<5)) |
+         (PINF&(1<<7) ? 0 : (1<<6)) |
+         (PINF&(1<<6) ? 0 : (1<<7)) |
+         (PINF&(1<<5) ? 0 : (1<<8)) |
+         (PINF&(1<<4) ? 0 : (1<<9)) |
+         (PINF&(1<<1) ? 0 : (1<<10)) |
+         (PINF&(1<<0) ? 0 : (1<<11));
+         
+}
+
+static void unselect_rows(void)
+{
+    DDRB &= ~(1<<0 | 1<<1 | 1<<2 | 1<<3);
+    PORTB |= (1<<0 | 1<<1 | 1<<2 | 1<<3);
+    
+}
+
+static void select_row(uint8_t row)
+{
+    switch (row) {
+        case 0:
+            DDRB  |= (1<<0);
+            PORTB &= ~(1<<0);
+            break;
+        case 1:
+            DDRB  |= (1<<1);
+            PORTB &= ~(1<<1);
+            break;
+        case 2:
+            DDRB  |= (1<<2);
+            PORTB &= ~(1<<2);
+            break;
+        case 3:
+            DDRB  |= (1<<3);
+            PORTB &= ~(1<<3);
+            break;
+        
+    }
+}