summaryrefslogtreecommitdiffstats
path: root/keyboards/hhkb/hhkb_avr.h
diff options
context:
space:
mode:
Diffstat (limited to 'keyboards/hhkb/hhkb_avr.h')
-rw-r--r--keyboards/hhkb/hhkb_avr.h167
1 files changed, 167 insertions, 0 deletions
diff --git a/keyboards/hhkb/hhkb_avr.h b/keyboards/hhkb/hhkb_avr.h
new file mode 100644
index 0000000000..7ea6322c73
--- /dev/null
+++ b/keyboards/hhkb/hhkb_avr.h
@@ -0,0 +1,167 @@
+#ifndef HHKB_AVR_H
+#define HHKB_AVR_H
+
+#include <stdint.h>
+#include <stdbool.h>
+#include <avr/io.h>
+#include <avr/interrupt.h>
+#include <util/delay.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
+
+
+/*
+ * HHKB Matrix I/O
+ *
+ * row: HC4051[A,B,C] selects scan row0-7
+ * row-ext: [En0,En1] row extention for JP
+ * col: LS145[A,B,C,D] selects scan col0-7 and enable(D)
+ * key: on: 0/off: 1
+ * prev: hysteresis control: assert(1) when previous key state is on
+ */
+
+
+#if defined(__AVR_ATmega32U4__)
+/*
+ * For TMK HHKB alt controller(ATMega32U4)
+ *
+ * row: PB0-2
+ * col: PB3-5,6
+ * key: PD7(pull-uped)
+ * prev: PB7
+ * power: PD4(L:off/H:on)
+ * row-ext: PC6,7 for HHKB JP(active low)
+ */
+static inline void KEY_ENABLE(void) { (PORTB &= ~(1<<6)); }
+static inline void KEY_UNABLE(void) { (PORTB |= (1<<6)); }
+static inline bool KEY_STATE(void) { return (PIND & (1<<7)); }
+static inline void KEY_PREV_ON(void) { (PORTB |= (1<<7)); }
+static inline void KEY_PREV_OFF(void) { (PORTB &= ~(1<<7)); }
+#ifdef HHKB_POWER_SAVING
+static inline void KEY_POWER_ON(void) {
+ DDRB = 0xFF; PORTB = 0x40; // change pins output
+ DDRD |= (1<<4); PORTD |= (1<<4); // MOS FET switch on
+ /* Without this wait you will miss or get false key events. */
+ _delay_ms(5); // wait for powering up
+}
+static inline void KEY_POWER_OFF(void) {
+ /* input with pull-up consumes less than without it when pin is open. */
+ DDRB = 0x00; PORTB = 0xFF; // change pins input with pull-up
+ DDRD |= (1<<4); PORTD &= ~(1<<4); // MOS FET switch off
+}
+static inline bool KEY_POWER_STATE(void) { return PORTD & (1<<4); }
+#else
+static inline void KEY_POWER_ON(void) {}
+static inline void KEY_POWER_OFF(void) {}
+static inline bool KEY_POWER_STATE(void) { return true; }
+#endif
+static inline void KEY_INIT(void)
+{
+ /* row,col,prev: output */
+ DDRB = 0xFF;
+ PORTB = 0x40; // unable
+ /* key: input with pull-up */
+ DDRD &= ~0x80;
+ PORTD |= 0x80;
+#ifdef HHKB_JP
+ /* row extention for HHKB JP */
+ DDRC |= (1<<6|1<<7);
+ PORTC |= (1<<6|1<<7);
+#endif
+ KEY_UNABLE();
+ KEY_PREV_OFF();
+
+ KEY_POWER_OFF();
+}
+static inline void KEY_SELECT(uint8_t ROW, uint8_t COL)
+{
+ PORTB = (PORTB & 0xC0) | (((COL) & 0x07)<<3) | ((ROW) & 0x07);
+#ifdef HHKB_JP
+ if ((ROW) & 0x08) PORTC = (PORTC & ~(1<<6|1<<7)) | (1<<6);
+ else PORTC = (PORTC & ~(1<<6|1<<7)) | (1<<7);
+#endif
+}
+
+
+#elif defined(__AVR_AT90USB1286__)
+/*
+ * For Teensy++(AT90USB1286)
+ *
+ * HHKB pro HHKB pro2
+ * row: PB0-2 (6-8) (5-7)
+ * col: PB3-5,6 (9-12) (8-11)
+ * key: PE6(pull-uped) (4) (3)
+ * prev: PE7 (5) (4)
+ *
+ * TODO: convert into 'staitc inline' function
+ */
+#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()
+#define KEY_POWER_STATE() true
+
+
+#else
+# error "define code for matrix scan"
+#endif
+
+
+#if 0
+// For ATMega328P with V-USB
+//
+// #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)
+#endif
+
+#endif