Apple IIgs/Standard Keyboard

1 files changed, 324 insertions, 0 deletions

diff --git a/keyboard/IIgs_Standard/matrix.c b/keyboard/IIgs_Standard/matrix.c
new file mode 100644
index 0000000000..c44ac641c9
--- /dev/null
+++ b/keyboard/IIgs_Standard/matrix.c
@@ -0,0 +1,324 @@
+/*
+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(uint8_t row);
+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)
+	// Column C1 ~ C7 (PortC0-6)
+	// Column C0(Port E1)
+    DDRC &= ~0b01111111;
+    PORTC |= 0b01111111;
+    DDRE &= ~0b00000010;
+    PORTE |= 0b00000010;
+	// modifier	B3/4,F4/5,E4	always input
+    DDRB |=  0b00011000;
+    PORTB &= 0b00011000;
+    DDRF |= ~0b00110000;
+    PORTF &= 0b00110000;
+    //DDRB &= ~0b00011000;
+    //PORTB |= 0b00011000;
+    //DDRF &= ~0b00110000;
+    //PORTF |= 0b00110000;
+    //DDRE &= ~0b00010000;
+    //PORTE |= 0b00010000;
+
+    // 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(i)) {
+            matrix[i] = (uint8_t)~read_col(i);
+            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(uint8_t row)
+{
+	// For normal 	: Column C1 ~ C7 (PortC0-6), C0(Port E1)
+	// For modifier	: B3(CNTRL)/4(SHIFT),F4(CMD/GUI)/5(OPTION,ALT)
+	// Modifier would be copied to report->mods except E4(CAPSLOCK)
+	uint8_t tmp;
+	if ( row == 10 ) {
+		tmp = 0xF0;
+		tmp |= (PINB >> 3 ) & 0b00000011;	// LEFT CTRL  is 0bit in modifier (HID Spec)
+											// LEFT SHIFT is 1bit in modifier (HID Spec)
+		tmp |= (PINF >> 3 ) & 0b00000100;	// LEFT ALT   is 2bit in modifier (HID Spec)
+		tmp |= (PINF >> 1 ) & 0b00001000;	// LEFT GUI   is 3bit in modifier (HID Spec)
+		//tmp |= (PINE << 1 ) & 0b00010000;	// Caps Lock(Should not be in modifier
+	} else {
+		tmp = 0x00;
+		tmp = (PINE >> 1)&0b00000001; 
+		tmp |= PINC << 1 ;
+	}
+	return tmp;
+}
+
+inline
+static void unselect_rows(void)
+{
+    // Hi-Z(DDR:0, PORT:0) to unselect
+	// DDR : 1, output	0, input
+    DDRB  &= ~0b00000011; // PB: 1,0  
+    PORTB &= ~0b00000011;
+    DDRD  &= ~0b00010000; // PD: 4
+    PORTD &= ~0b00010000;
+    DDRE  &= ~0b11000000; // PE: 7,6
+    PORTE &= ~0b11000000;
+    DDRF  &= ~0b11000111; // PF: 7,6,2,1,0 
+    PORTF &= ~0b11000111;
+	// to unselect virtual row(modifier), set port to output with low
+    DDRB  |=  0b00011000; // PB: 3,4 for modifier(row10)
+    PORTB &= ~0b00011000;
+    DDRF  |=  0b00110000; // PF: 4,5 for modifier
+    PORTF &= ~0b00110000;
+}
+
+inline
+static void select_row(uint8_t row)
+{
+    // Output low(DDR:1, PORT:0) to select
+	// with row enable, column could send low to AVR when pressed
+    // row: 0    1    2    3    4    5    6    7    8    9
+    // pin: PB1, PB0, PE7, PE6, PD4, PF2, PF0, PF1, PF6  PF7
+    switch (row) {
+        case 0:
+            DDRB  |= (1<<1);
+            PORTB &= ~(1<<1);
+            break;
+        case 1:
+            DDRB  |= (1<<0);
+            PORTB &= ~(1<<0);
+            break;
+        case 2:
+            DDRE  |= (1<<7);
+            PORTE &= ~(1<<7);
+            break;
+        case 3:
+            DDRE  |= (1<<6);
+            PORTE &= ~(1<<6);
+            break;
+        case 4:
+            DDRD  |= (1<<4);
+            PORTD &= ~(1<<4);
+            break;
+        case 5:
+            DDRF  |= (1<<2);
+            PORTF &= ~(1<<2);
+            break;
+        case 6:
+            DDRF  |= (1<<0);
+            PORTF &= ~(1<<0);
+            break;
+        case 7:
+            DDRF  |= (1<<1);
+            PORTF &= ~(1<<1);
+            break;
+        case 8:
+            DDRF  |= (1<<6);
+            PORTF &= ~(1<<6);
+            break;
+        case 9:
+            DDRF  |= (1<<7);
+            PORTF &= ~(1<<7);
+            break;
+		case 10:
+			// modifier has no row enable
+			// to select virtual row, set port as input
+		    DDRB &= ~0b00011000;
+		    PORTB |= 0b00011000;
+		    DDRF &= ~0b00110000;
+		    PORTF |= 0b00110000;
+            break;
+
+    }
+}