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-rw-r--r--keyboard/IIgs_Standard/matrix.c363
1 files changed, 363 insertions, 0 deletions
diff --git a/keyboard/IIgs_Standard/matrix.c b/keyboard/IIgs_Standard/matrix.c
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+/*
+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"
+#include "led.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;
+ //DDRB &= ~0b00000100;
+ //PORTB |= 0b00000100;
+ // modifier B3/4,F4/5,E4 always input
+ // A0
+ //DDRA |= 0b00000001;
+ //PORTA &= 0b00000001;
+ //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 ( i == ( MATRIX_ROWS - 1 ) ) { // CHECK CAPS LOCK
+ if (host_keyboard_leds() & (1<<USB_LED_CAPS_LOCK)) { // CAPS LOCK is ON on HOST
+ if ( ~read_col(i) & (1<< 4) ) { // CAPS LOCK is still DOWN ( 0bXXX1_XXXX)
+ matrix[i] = ~read_col(i) & 0b11101111; // change CAPS LOCK as released
+ } else { // CAPS LOCK in UP
+ matrix[i] = ~read_col(i) | 0b00010000; // send fake caps lock down
+ }
+ } else { // CAPS LOCK is OFF on HOST
+ 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;
+ }
+ }
+ } else {
+ 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)
+{
+// if ( row == ( MATRIX_ROWS - 1 ) && col == 4) { // CHECK CAPS LOCK
+// if (host_keyboard_leds() & (1<<USB_LED_CAPS_LOCK)) { // CAPS LOCK is ON on HOST
+// if ((matrix_prev[row] & 0b00010000) && (~matrix[row] & 0b00010000)) {
+// debug("CapsLock Reverse:");debug_hex(matrix[row]);
+// matrix[row] |= 0b00010000;
+// matrix_prev[row] &= ~0b00010000;
+// debug("->");debug_hex(matrix[row]);debug("\n");
+// }
+// }
+// }
+ 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 = 0xC0;
+ 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 |= (PINA << 4 ) & 0b00010000; // CAPSLOCK
+ tmp |= (PINB << 3 ) & 0b00100000; // POWER
+ } 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
+ DDRA |= 0b00000001; // PA: 0 for CAPSLOCK
+ PORTA &= ~0b00000001;
+ DDRB |= 0b00011100; // PB: 3,4 for modifier(row10)
+ PORTB &= ~0b00011100; // PB: 2 for power
+ 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
+ DDRA &= ~0b00000001;
+ PORTA |= 0b00000001;
+ DDRB &= ~0b00011100;
+ PORTB |= 0b00011100;
+ DDRF &= ~0b00110000;
+ PORTF |= 0b00110000;
+ break;
+
+ }
+}
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