From a6d33e2c98b16fdd3c7eaccb9e8c941d4315d528 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Vlastimil=20Ov=C4=8D=C3=A1=C4=8D=C3=ADk?=
<vovcacik@github.ovcacik.org>
Date: Sun, 28 Dec 2014 09:49:57 +0100
Subject: Added support for The Ghost Squid controller used for CM XT keyboard.
- initial commit
- created as clone of the kitten_paw subproject with pins adjusted for CM
XT
---
keyboard/ghost_squid/matrix.c | 237 ++++++++++++++++++++++++++++++++++++++++++
1 file changed, 237 insertions(+)
create mode 100644 keyboard/ghost_squid/matrix.c
(limited to 'keyboard/ghost_squid/matrix.c')
diff --git a/keyboard/ghost_squid/matrix.c b/keyboard/ghost_squid/matrix.c
new file mode 100644
index 000000000..d6a82ef75
--- /dev/null
+++ b/keyboard/ghost_squid/matrix.c
@@ -0,0 +1,237 @@
+/*
+Copyright 2014 Ralf Schmitt <ralf@bunkertor.net>
+
+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 0
+#endif
+static uint8_t debouncing = DEBOUNCE;
+
+static matrix_row_t matrix[MATRIX_ROWS];
+static matrix_row_t matrix_debouncing[MATRIX_ROWS];
+
+static uint8_t read_rows(void);
+static void init_rows(void);
+static void unselect_cols(void);
+static void select_col(uint8_t col);
+
+inline uint8_t matrix_rows(void)
+{
+ return MATRIX_ROWS;
+}
+
+inline uint8_t matrix_cols(void)
+{
+ return MATRIX_COLS;
+}
+
+void matrix_init(void)
+{
+ unselect_cols();
+ init_rows();
+ for (uint8_t i=0; i < MATRIX_ROWS; i++) {
+ matrix[i] = 0;
+ matrix_debouncing[i] = 0;
+ }
+}
+
+uint8_t matrix_scan(void)
+{
+ for (uint8_t col = 0; col < MATRIX_COLS; col++) {
+ select_col(col);
+ _delay_us(3);
+ uint8_t rows = read_rows();
+ for (uint8_t row = 0; row < MATRIX_ROWS; row++) {
+ bool prev_bit = matrix_debouncing[row] & ((matrix_row_t)1<<col);
+ bool curr_bit = rows & (1<<row);
+ if (prev_bit != curr_bit) {
+ matrix_debouncing[row] ^= ((matrix_row_t)1<<col);
+ debouncing = DEBOUNCE;
+ }
+ }
+ unselect_cols();
+ }
+
+ if (debouncing) {
+ if (--debouncing) {
+ _delay_ms(1);
+ } else {
+ for (uint8_t i = 0; i < MATRIX_ROWS; i++) {
+ matrix[i] = matrix_debouncing[i];
+ }
+ }
+ }
+
+ return 1;
+}
+
+bool matrix_is_modified(void)
+{
+ if (debouncing) return false;
+ return true;
+}
+
+inline bool matrix_is_on(uint8_t row, uint8_t col)
+{
+ return (matrix[row] & ((matrix_row_t)1<<col));
+}
+
+inline matrix_row_t matrix_get_row(uint8_t row)
+{
+ return matrix[row];
+}
+
+void matrix_print(void)
+{
+ print("\nr/c 0123456789ABCDEF\n");
+ for (uint8_t row = 0; row < MATRIX_ROWS; row++) {
+ xprintf("%02X: %032lb\n", row, bitrev32(matrix_get_row(row)));
+ }
+}
+
+uint8_t matrix_key_count(void)
+{
+ uint8_t count = 0;
+ for (uint8_t i = 0; i < MATRIX_ROWS; i++) {
+ count += bitpop32(matrix[i]);
+ }
+ return count;
+}
+
+/* Row pin configuration
+ *
+ * row: 0 1 2 3 4 5 6 7
+ * pin: PB1 PC2 PB6 PB4 PB3 PB5 PB0 PB2
+ *
+ */
+static void init_rows(void)
+{
+ DDRC &= ~0b00000100;
+ DDRB &= ~0b01111111;
+ PORTC |= 0b00000100;
+ PORTB |= 0b01111111;
+}
+
+static uint8_t read_rows(void)
+{
+ return (PINB&(1<<1) ? 0 : (1<<0)) |
+ (PINC&(1<<2) ? 0 : (1<<1)) |
+ (PINB&(1<<6) ? 0 : (1<<2)) |
+ (PINB&(1<<4) ? 0 : (1<<3)) |
+ (PINB&(1<<3) ? 0 : (1<<4)) |
+ (PINB&(1<<5) ? 0 : (1<<5)) |
+ (PINB&(1<<0) ? 0 : (1<<6)) |
+ (PINB&(1<<2) ? 0 : (1<<7));
+}
+
+/* These columns uses two 74HC42 4 to 10 bit demultiplexers (low active).
+ *
+ * COL PD6 PD5 PD4 PD3 PD2 PD1
+ * 10 1 1 0 0 0 0
+ * 15 1 1 0 0 0 1
+ * 8 1 1 0 0 1 0
+ * 14 1 1 0 1 0 0
+ * 6 1 1 0 1 0 1
+ * 13 1 1 0 1 1 0
+ * 12 1 1 1 0 0 0
+ * 9 1 1 1 0 1 0
+ * 11 1 1 1 1 0 0
+ * 7 1 1 1 1 1 0
+ *
+ * COL PD1 PD2 PD3 PD4 PD5 PD6
+ * 3 1 1 0 0 0 1
+ * 4 1 1 0 0 1 0
+ * 17 1 1 0 1 0 0
+ * 16 1 1 0 1 1 0
+ * 0 1 1 1 0 0 1
+ * 5 1 1 1 0 1 0
+ * 2 1 1 1 1 0 0
+ * 1 1 1 1 1 1 0
+ */
+static void unselect_cols(void)
+{
+ DDRD |= 0b01111111;
+ PORTD &= ~0b01111111;
+}
+
+static void select_col(uint8_t col)
+{
+ switch (col) {
+ case 0:
+ PORTD |= (1<<6) | (1<<3) | (1<<2) | (1<<1);
+ break;
+ case 1:
+ PORTD |= (1<<5) | (1<<4) | (1<<3) | (1<<2) | (1<<1);
+ break;
+ case 2:
+ PORTD |= (1<<4) | (1<<3) | (1<<2) | (1<<1);
+ break;
+ case 3:
+ PORTD |= (1<<6) | (1<<2) | (1<<1);
+ break;
+ case 4:
+ PORTD |= (1<<5) | (1<<2) | (1<<1);
+ break;
+ case 5:
+ PORTD |= (1<<5) | (1<<3) | (1<<2) | (1<<1);
+ break;
+ case 6:
+ PORTD |= (1<<6) | (1<<5) | (1<<3) | (1<<1);
+ break;
+ case 7:
+ PORTD |= (1<<6) | (1<<5) | (1<<4) | (1<<3) | (1<<2);
+ break;
+ case 8:
+ PORTD |= (1<<6) | (1<<5) | (1<<2);
+ break;
+ case 9:
+ PORTD |= (1<<6) | (1<<5) | (1<<4) | (1<<2);
+ break;
+ case 10:
+ PORTD |= (1<<6) | (1<<5);
+ break;
+ case 11:
+ PORTD |= (1<<6) | (1<<5) | (1<<4) | (1<<3);
+ break;
+ case 12:
+ PORTD |= (1<<6) | (1<<5) | (1<<4);
+ break;
+ case 13:
+ PORTD |= (1<<6) | (1<<5) | (1<<3) | (1<<2);
+ break;
+ case 14:
+ PORTD |= (1<<6) | (1<<5) | (1<<3);
+ break;
+ case 15:
+ PORTD |= (1<<6) | (1<<5) | (1<<1);
+ break;
+ case 16:
+ PORTD |= (1<<5) | (1<<4) | (1<<2) | (1<<1);
+ break;
+ case 17:
+ PORTD |= (1<<4) | (1<<2) | (1<<1);
+ break;
+ }
+}
--
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