From 878daae9c337e712d5ec65232851dd5e58aca0b9 Mon Sep 17 00:00:00 2001
From: tmk <nobody@nowhere>
Date: Sat, 10 Nov 2012 14:46:57 +0900
Subject: Rename to hid_liber.

---
 keyboard/hid_liber/matrix.c | 233 ++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 233 insertions(+)
 create mode 100644 keyboard/hid_liber/matrix.c

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

diff --git a/keyboard/hid_liber/matrix.c b/keyboard/hid_liber/matrix.c
new file mode 100644
index 0000000000..975ff9aaca
--- /dev/null
+++ b/keyboard/hid_liber/matrix.c
@@ -0,0 +1,233 @@
+/*
+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/>.
+*/
+#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	5
+#endif
+static uint8_t debouncing = DEBOUNCE;
+
+// bit array of key state(1:on, 0:off)
+static matrix_row_t *matrix;
+static matrix_row_t *matrix_debounced;
+static matrix_row_t _matrix0[MATRIX_ROWS];
+static matrix_row_t _matrix1[MATRIX_ROWS];
+
+
+#define NROW 18
+#define NCOL 8
+#define _DDRA (uint8_t *const)&DDRA
+#define _DDRB (uint8_t *const)&DDRB
+#define _DDRC (uint8_t *const)&DDRC
+#define _DDRD (uint8_t *const)&DDRD
+#define _DDRE (uint8_t *const)&DDRE
+#define _DDRF (uint8_t *const)&DDRF
+
+#define _PINA (uint8_t *const)&PINA
+#define _PINB (uint8_t *const)&PINB
+#define _PINC (uint8_t *const)&PINC
+#define _PIND (uint8_t *const)&PIND
+#define _PINE (uint8_t *const)&PINE
+#define _PINF (uint8_t *const)&PINF
+
+#define _PORTA (uint8_t *const)&PORTA
+#define _PORTB (uint8_t *const)&PORTB
+#define _PORTC (uint8_t *const)&PORTC
+#define _PORTD (uint8_t *const)&PORTD
+#define _PORTE (uint8_t *const)&PORTE
+#define _PORTF (uint8_t *const)&PORTF
+
+#define _BIT0 0x01
+#define _BIT1 0x02
+#define _BIT2 0x04
+#define _BIT3 0x08
+#define _BIT4 0x10
+#define _BIT5 0x20
+#define _BIT6 0x40
+#define _BIT7 0x80
+
+/* Specifies the ports and pin numbers for the rows */
+static
+uint8_t *const  row_ddr[NROW] = {                                 _DDRB,                  _DDRB,
+				                                                  _DDRC,  _DDRC,
+				  _DDRD,  _DDRD,  _DDRD,  _DDRD,  _DDRD,  _DDRD,  _DDRD,  _DDRD,
+				  _DDRF,  _DDRF,                  _DDRF,  _DDRF,  _DDRF,  _DDRF};
+
+static
+uint8_t *const row_port[NROW] = {                                _PORTB,                 _PORTB,
+				 _PORTC, _PORTC,
+				 _PORTD, _PORTD, _PORTD, _PORTD, _PORTD, _PORTD, _PORTD, _PORTD,
+				 _PORTF, _PORTF,                 _PORTF, _PORTF, _PORTF, _PORTF};
+
+static
+uint8_t *const  row_pin[NROW] = {                                 _PINB,                  _PINB,
+				  _PINC,  _PINC,
+				  _PIND,  _PIND,  _PIND,  _PIND,  _PIND,  _PIND,  _PIND,  _PIND,
+				  _PINF,  _PINF,                  _PINF,  _PINF,  _PINF,  _PINF};
+
+static
+const uint8_t   row_bit[NROW] = {                                 _BIT4,                  _BIT7,
+				                                                  _BIT6,  _BIT7,
+				  _BIT0,  _BIT1,  _BIT2,  _BIT3,  _BIT4,  _BIT5,  _BIT6,  _BIT7,
+				  _BIT0,  _BIT1,                  _BIT4,  _BIT5,  _BIT6,  _BIT7};
+
+static
+const uint8_t mask = 0x0E;
+
+/* Specifies the ports and pin numbers for the columns */
+static
+const uint8_t   col_bit[NCOL] = {  0x00,   0x02,   0x04,   0x06,   0x08,   0x0A,   0x0C,   0x0E};
+
+static
+inline void pull_column(int col) {
+  PORTB = col_bit[col] | (PORTB & ~mask);
+}
+
+static
+inline void release_column(int col) {
+}
+
+/* PORTB is set as input with pull-up resistors
+   PORTC,D,E,F are set to high output */
+static
+void setup_io_pins(void) {
+  uint8_t row;
+  DDRB  |=  0x0E;
+  PORTB &= ~0x0E;
+  for(row = 0; row < NROW; row++) {
+    *row_ddr[row]  &= ~row_bit[row];
+    *row_port[row] &= ~row_bit[row];
+  }
+}
+
+static
+void setup_leds(void) {
+  DDRB  |=  0x60;
+  PORTB |=  0x60;
+}
+
+
+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
+    setup_io_pins();
+    setup_leds();
+
+    // 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_debounced = _matrix1;
+}
+
+uint8_t matrix_scan(void)
+{
+    if (!debouncing) {
+        uint8_t *tmp = matrix_debounced;
+        matrix_debounced = matrix;
+        matrix = tmp;
+    }
+
+    for (uint8_t col = 0; col < NCOL; col++) {  // 0-7
+        pull_column(col);   // output hi on theline
+        _delay_us(1);       // without this wait it won't read stable value.
+        for (uint8_t row = 0; row < NROW; row++) {  // 0-17
+            bool prev_bit = matrix[row] & (1<<col);
+            bool curr_bit = *row_pin[row] & row_bit[row];
+            if (prev_bit != curr_bit) {
+                matrix[row] ^= (1<<col);
+                if (debouncing) {
+                    debug("bounce!: "); debug_hex(debouncing); print("\n");
+                }
+                debouncing = DEBOUNCE;
+            }
+        }
+        release_column(col);
+    }
+
+    if (debouncing) {
+        debouncing--;
+    }
+
+    return 1;
+}
+
+bool matrix_is_modified(void)
+{
+    // NOTE: no longer used
+    return true;
+}
+
+inline
+bool matrix_has_ghost(void)
+{
+    return false;
+}
+
+inline
+bool matrix_is_on(uint8_t row, uint8_t col)
+{
+    return (matrix_debounced[row] & (1<<col));
+}
+
+inline
+matrix_row_t matrix_get_row(uint8_t row)
+{
+    return matrix_debounced[row];
+}
+
+void matrix_print(void)
+{
+    print("\nr/c 01234567\n");
+    for (uint8_t row = 0; row < MATRIX_ROWS; row++) {
+        phex(row); print(": ");
+        pbin_reverse(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++) {
+        for (uint8_t j = 0; j < MATRIX_COLS; j++) {
+            if (matrix_is_on(i, j))
+                count++;
+        }
+    }
+    return count;
+}
-- 
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