From dd93d2915f79d0b825fc6bbc4edb556a69eac406 Mon Sep 17 00:00:00 2001
From: tmk <nobody@nowhere>
Date: Tue, 26 Jun 2012 15:55:45 +0900
Subject: initial attempt for LUFA.

Add keyboard/lufa macway keyobard with LUFA.
Add new program target to rule.mk; flip, dfu and teensy
---
 keyboard/lufa/matrix.c | 271 +++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 271 insertions(+)
 create mode 100644 keyboard/lufa/matrix.c

(limited to 'keyboard/lufa/matrix.c')

diff --git a/keyboard/lufa/matrix.c b/keyboard/lufa/matrix.c
new file mode 100644
index 0000000000..394c3d9709
--- /dev/null
+++ b/keyboard/lufa/matrix.c
@@ -0,0 +1,271 @@
+/*
+Copyright 2011 Jun Wako <wakojun@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 "print.h"
+#include "debug.h"
+#include "util.h"
+#include "matrix.h"
+
+
+#if (MATRIX_COLS > 16)
+#   error "MATRIX_COLS must not exceed 16"
+#endif
+#if (MATRIX_ROWS > 255)
+#   error "MATRIX_ROWS must not exceed 255"
+#endif
+
+
+#ifndef DEBOUNCE
+#   define DEBOUNCE	0
+#endif
+static uint8_t debouncing = DEBOUNCE;
+
+// matrix state buffer(1:on, 0:off)
+#if (MATRIX_COLS <= 8)
+static uint8_t *matrix;
+static uint8_t *matrix_prev;
+static uint8_t _matrix0[MATRIX_ROWS];
+static uint8_t _matrix1[MATRIX_ROWS];
+#else
+static uint16_t *matrix;
+static uint16_t *matrix_prev;
+static uint16_t _matrix0[MATRIX_ROWS];
+static uint16_t _matrix1[MATRIX_ROWS];
+#endif
+
+#ifdef MATRIX_HAS_GHOST
+static bool matrix_has_ghost_in_row(uint8_t row);
+#endif
+static uint8_t read_col(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();
+    // Input with pull-up(DDR:0, PORT:1)
+    DDRB = 0x00;
+    PORTB = 0xFF;
+
+    // initialize matrix state: all keys off
+    for (uint8_t i=0; i < MATRIX_ROWS; i++) _matrix0[i] = 0x00;
+    for (uint8_t i=0; i < MATRIX_ROWS; i++) _matrix1[i] = 0x00;
+    matrix = _matrix0;
+    matrix_prev = _matrix1;
+}
+
+uint8_t matrix_scan(void)
+{
+    if (!debouncing) {
+        uint8_t *tmp = matrix_prev;
+        matrix_prev = matrix;
+        matrix = tmp;
+    }
+
+    for (uint8_t i = 0; i < MATRIX_ROWS; i++) {
+        unselect_rows();
+        select_row(i);
+        _delay_us(30);  // without this wait read unstable value.
+        if (matrix[i] != (uint8_t)~read_col()) {
+            matrix[i] = (uint8_t)~read_col();
+            if (debouncing) {
+                debug("bounce!: "); debug_hex(debouncing); print("\n");
+            }
+            debouncing = DEBOUNCE;
+        }
+    }
+    unselect_rows();
+
+    if (debouncing) {
+        debouncing--;
+    }
+
+    return 1;
+}
+
+bool matrix_is_modified(void)
+{
+    if (debouncing) return false;
+    for (uint8_t i = 0; i < MATRIX_ROWS; i++) {
+        if (matrix[i] != matrix_prev[i]) {
+            return true;
+        }
+    }
+    return false;
+}
+
+inline
+bool matrix_has_ghost(void)
+{
+#ifdef MATRIX_HAS_GHOST
+    for (uint8_t i = 0; i < MATRIX_ROWS; i++) {
+        if (matrix_has_ghost_in_row(i))
+            return true;
+    }
+#endif
+    return false;
+}
+
+inline
+bool matrix_is_on(uint8_t row, uint8_t col)
+{
+    return (matrix[row] & (1<<col));
+}
+
+inline
+#if (MATRIX_COLS <= 8)
+uint8_t matrix_get_row(uint8_t row)
+#else
+uint16_t matrix_get_row(uint8_t row)
+#endif
+{
+    return matrix[row];
+}
+
+void matrix_print(void)
+{
+    print("\nr/c 01234567\n");
+    for (uint8_t row = 0; row < matrix_rows(); row++) {
+        phex(row); print(": ");
+#if (MATRIX_COLS <= 8)
+        pbin_reverse(matrix_get_row(row));
+#else
+        pbin_reverse16(matrix_get_row(row));
+#endif
+#ifdef MATRIX_HAS_GHOST
+        if (matrix_has_ghost_in_row(row)) {
+            print(" <ghost");
+        }
+#endif
+        print("\n");
+    }
+}
+
+uint8_t matrix_key_count(void)
+{
+    uint8_t count = 0;
+    for (uint8_t i = 0; i < MATRIX_ROWS; i++) {
+#if (MATRIX_COLS <= 8)
+        count += bitpop(matrix[i]);
+#else
+        count += bitpop16(matrix[i]);
+#endif
+    }
+    return count;
+}
+
+#ifdef MATRIX_HAS_GHOST
+inline
+static bool matrix_has_ghost_in_row(uint8_t row)
+{
+    // no ghost exists in case less than 2 keys on
+    if (((matrix[row] - 1) & matrix[row]) == 0)
+        return false;
+
+    // ghost exists in case same state as other row
+    for (uint8_t i=0; i < MATRIX_ROWS; i++) {
+        if (i != row && (matrix[i] & matrix[row]) == matrix[row])
+            return true;
+    }
+    return false;
+}
+#endif
+
+inline
+static uint8_t read_col(void)
+{
+    return PINB;
+}
+
+inline
+static void unselect_rows(void)
+{
+    // Hi-Z(DDR:0, PORT:0) to unselect
+    DDRC  &= ~0b01000000; // PC: 6
+    PORTC &= ~0b11000000;
+    DDRD  &= ~0b11100111; // PD: 7,6,5,2,1,0
+    PORTD &= ~0b11000111;
+    DDRF  &= ~0b11000000; // PF: 7,6
+    PORTF &= ~0b11000000;
+}
+
+inline
+static void select_row(uint8_t row)
+{
+    // Output low(DDR:1, PORT:0) to select
+    // row: 0    1    2    3    4    5    6    7    8
+    // pin: PD0, PD5, PD7, PF6, PD6, PD1, PD2, PC6, PF7
+    switch (row) {
+        case 0:
+            DDRD  |= (1<<0);
+            PORTD &= ~(1<<0);
+            break;
+        case 1:
+            DDRD  |= (1<<5);
+            PORTD &= ~(1<<5);
+            break;
+        case 2:
+            DDRD  |= (1<<7);
+            PORTD &= ~(1<<7);
+            break;
+        case 3:
+            DDRF  |= (1<<6);
+            PORTF &= ~(1<<6);
+            break;
+        case 4:
+            DDRD  |= (1<<6);
+            PORTD &= ~(1<<6);
+            break;
+        case 5:
+            DDRD  |= (1<<1);
+            PORTD &= ~(1<<1);
+            break;
+        case 6:
+            DDRD  |= (1<<2);
+            PORTD &= ~(1<<2);
+            break;
+        case 7:
+            DDRC  |= (1<<6);
+            PORTC &= ~(1<<6);
+            break;
+        case 8:
+            DDRF  |= (1<<7);
+            PORTF &= ~(1<<7);
+            break;
+    }
+}
-- 
cgit v1.2.3