summaryrefslogtreecommitdiff
path: root/keyboard/hhkb_rn42/matrix.c
diff options
context:
space:
mode:
Diffstat (limited to 'keyboard/hhkb_rn42/matrix.c')
-rw-r--r--keyboard/hhkb_rn42/matrix.c288
1 files changed, 288 insertions, 0 deletions
diff --git a/keyboard/hhkb_rn42/matrix.c b/keyboard/hhkb_rn42/matrix.c
new file mode 100644
index 0000000000..d0731ef1f8
--- /dev/null
+++ b/keyboard/hhkb_rn42/matrix.c
@@ -0,0 +1,288 @@
+/*
+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 <avr/interrupt.h>
+#include <util/delay.h>
+#include "print.h"
+#include "debug.h"
+#include "util.h"
+#include "timer.h"
+#include "matrix.h"
+
+
+// Timer resolution check
+#if (1000000/TIMER_RAW_FREQ > 20)
+# error "Timer resolution(>20us) is not enough for HHKB matrix scan tweak on V-USB."
+#endif
+
+
+// matrix state buffer(1:on, 0:off)
+static matrix_row_t *matrix;
+static matrix_row_t *matrix_prev;
+static matrix_row_t _matrix0[MATRIX_ROWS];
+static matrix_row_t _matrix1[MATRIX_ROWS];
+
+
+// Matrix I/O ports
+//
+// row: HC4051[A,B,C] selects scan row0-7
+// col: LS145[A,B,C,D] selects scan col0-7 and enable(D)
+// key: on: 0/off: 1
+// prev: unknown: output previous key state(negated)?
+
+#if defined(__AVR_AT90USB1286__)
+// Ports for Teensy++
+// row: PB0-2
+// col: PB3-5,6
+// key: PE6(pull-uped)
+// prev: PE7
+#define KEY_INIT() do { \
+ DDRB |= 0x7F; \
+ DDRE |= (1<<7); \
+ DDRE &= ~(1<<6); \
+ PORTE |= (1<<6); \
+} while (0)
+#define KEY_SELECT(ROW, COL) (PORTB = (PORTB & 0xC0) | \
+ (((COL) & 0x07)<<3) | \
+ ((ROW) & 0x07))
+#define KEY_ENABLE() (PORTB &= ~(1<<6))
+#define KEY_UNABLE() (PORTB |= (1<<6))
+#define KEY_STATE() (PINE & (1<<6))
+#define KEY_PREV_ON() (PORTE |= (1<<7))
+#define KEY_PREV_OFF() (PORTE &= ~(1<<7))
+#define KEY_POWER_ON()
+#define KEY_POWER_OFF()
+
+#elif defined(__AVR_ATmega32U4__)
+// Ports for my designed Alt Controller PCB
+// row: PB0-2
+// col: PB3-5,6
+// key: PD7(pull-uped)
+// prev: PB7
+// power: PD4(L:off/H:on)
+#define KEY_INIT() do { \
+ DDRB = 0xFF; \
+ PORTB = 0x00; \
+ DDRD &= ~0x80; \
+ PORTD |= 0x80; \
+ /* keyswitch board power on */ \
+ DDRD |= (1<<4); \
+ PORTD |= (1<<4); \
+ KEY_UNABLE(); \
+ KEY_PREV_OFF(); \
+} while (0)
+#define KEY_SELECT(ROW, COL) (PORTB = (PORTB & 0xC0) | \
+ (((COL) & 0x07)<<3) | \
+ ((ROW) & 0x07))
+#define KEY_ENABLE() (PORTB &= ~(1<<6))
+#define KEY_UNABLE() (PORTB |= (1<<6))
+#define KEY_STATE() (PIND & (1<<7))
+#define KEY_PREV_ON() (PORTB |= (1<<7))
+#define KEY_PREV_OFF() (PORTB &= ~(1<<7))
+#define KEY_POWER_ON()
+#define KEY_POWER_OFF()
+/*
+#define KEY_POWER_ON() do { \
+ KEY_INIT(); \
+ PORTD |= (1<<4); \
+ _delay_ms(1); \
+} while (0)
+#define KEY_POWER_OFF() do { \
+ PORTD &= ~(1<<4); \
+ DDRB &= ~0xFF; \
+ PORTB &= ~0xFF; \
+ DDRB &= ~0x80; \
+ PORTB &= ~0x80; \
+} while (0)
+*/
+
+
+#elif defined(__AVR_ATmega328P__)
+// Ports for V-USB
+// key: PB0(pull-uped)
+// prev: PB1
+// row: PB2-4
+// col: PC0-2,3
+// power: PB5(Low:on/Hi-z:off)
+#define KEY_INIT() do { \
+ DDRB |= 0x3E; \
+ DDRB &= ~(1<<0); \
+ PORTB |= 1<<0; \
+ DDRC |= 0x0F; \
+ KEY_UNABLE(); \
+ KEY_PREV_OFF(); \
+} while (0)
+#define KEY_SELECT(ROW, COL) do { \
+ PORTB = (PORTB & 0xE3) | ((ROW) & 0x07)<<2; \
+ PORTC = (PORTC & 0xF8) | ((COL) & 0x07); \
+} while (0)
+#define KEY_ENABLE() (PORTC &= ~(1<<3))
+#define KEY_UNABLE() (PORTC |= (1<<3))
+#define KEY_STATE() (PINB & (1<<0))
+#define KEY_PREV_ON() (PORTB |= (1<<1))
+#define KEY_PREV_OFF() (PORTB &= ~(1<<1))
+// Power supply switching
+#define KEY_POWER_ON() do { \
+ KEY_INIT(); \
+ PORTB &= ~(1<<5); \
+ _delay_ms(1); \
+} while (0)
+#define KEY_POWER_OFF() do { \
+ DDRB &= ~0x3F; \
+ PORTB &= ~0x3F; \
+ DDRC &= ~0x0F; \
+ PORTC &= ~0x0F; \
+} while (0)
+
+#else
+# error "define code for matrix scan"
+#endif
+
+
+inline
+uint8_t matrix_rows(void)
+{
+ return MATRIX_ROWS;
+}
+
+inline
+uint8_t matrix_cols(void)
+{
+ return MATRIX_COLS;
+}
+
+void matrix_init(void)
+{
+#ifdef DEBUG
+ debug_enable = true;
+ debug_keyboard = true;
+#endif
+
+ KEY_INIT();
+
+ // 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)
+{
+ uint8_t *tmp;
+
+ tmp = matrix_prev;
+ matrix_prev = matrix;
+ matrix = tmp;
+
+ KEY_POWER_ON();
+ for (uint8_t row = 0; row < MATRIX_ROWS; row++) {
+ for (uint8_t col = 0; col < MATRIX_COLS; col++) {
+ KEY_SELECT(row, col);
+ _delay_us(40);
+
+ // Not sure this is needed. This just emulates HHKB controller's behaviour.
+ if (matrix_prev[row] & (1<<col)) {
+ KEY_PREV_ON();
+ }
+ _delay_us(7);
+
+ // NOTE: KEY_STATE is valid only in 20us after KEY_ENABLE.
+ // If V-USB interrupts in this section we could lose 40us or so
+ // and would read invalid value from KEY_STATE.
+ uint8_t last = TIMER_RAW;
+
+ KEY_ENABLE();
+
+ // Wait for KEY_STATE outputs its value.
+ // 1us was ok on one HHKB, but not worked on another.
+ // no wait doesn't work on Teensy++ with pro(1us works)
+ // no wait does work on tmk PCB(8MHz) with pro2
+ // 1us wait does work on both of above
+ // 1us wait doesn't work on tmk(16MHz)
+ // 5us wait does work on tmk(16MHz)
+ // 5us wait does work on tmk(16MHz/2)
+ // 5us wait does work on tmk(8MHz)
+ // 10us wait does work on Teensy++ with pro
+ // 10us wait does work on 328p+iwrap with pro
+ // 10us wait doesn't work on tmk PCB(8MHz) with pro2(very lagged scan)
+ _delay_us(5);
+
+ if (KEY_STATE()) {
+ matrix[row] &= ~(1<<col);
+ } else {
+ matrix[row] |= (1<<col);
+ }
+
+ // Ignore if this code region execution time elapses more than 20us.
+ // MEMO: 20[us] * (TIMER_RAW_FREQ / 1000000)[count per us]
+ // MEMO: then change above using this rule: a/(b/c) = a*1/(b/c) = a*(c/b)
+ if (TIMER_DIFF_RAW(TIMER_RAW, last) > 20/(1000000/TIMER_RAW_FREQ)) {
+ matrix[row] = matrix_prev[row];
+ }
+
+ KEY_PREV_OFF();
+ KEY_UNABLE();
+ // NOTE: KEY_STATE keep its state in 20us after KEY_ENABLE.
+ // This takes 25us or more to make sure KEY_STATE returns to idle state.
+ _delay_us(150);
+ }
+ }
+ KEY_POWER_OFF();
+ return 1;
+}
+
+bool matrix_is_modified(void)
+{
+ 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)
+{
+ return false;
+}
+
+inline
+bool matrix_is_on(uint8_t row, uint8_t col)
+{
+ return (matrix[row] & (1<<col));
+}
+
+inline
+matrix_row_t matrix_get_row(uint8_t row)
+{
+ return matrix[row];
+}
+
+void matrix_print(void)
+{
+ print("\nr/c 01234567\n");
+ for (uint8_t row = 0; row < matrix_rows(); row++) {
+ xprintf("%02X: %08b\n", row, bitrev(matrix_get_row(row)));
+ }
+}
generated by cgit v1.2.3 (git 2.25.1) at 2024-07-05 09:59:29 +0000