From 015aed50a36ba9582fb24023f2ecc4f14b16dcfd Mon Sep 17 00:00:00 2001
From: MechMerlin <30334081+mechmerlin@users.noreply.github.com>
Date: Fri, 30 Mar 2018 22:57:49 -0700
Subject: AMJ96 Support (#2651)

* Initial commit: Get things compiling

* port the custom matrix code

* Update readme

* make second layer fully transparent

* populate config.h identifiers with more correct information

* Add in switch backlight support

* Enable backlight LEDs, and change pin for RGB

* port TMK version over

* remove all that TMK stuff, it didn't work lol

* Updated readme

* Fix keymap

- Change KEYMAP to LAYOUT
- Adjust formatting of table

* Edit readme to reflect NOTES

* add info.json for QMK configurator support

* Replaced placeholder with MechMerlin
---
 keyboards/amj96/matrix.c | 222 +++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 222 insertions(+)
 create mode 100644 keyboards/amj96/matrix.c

(limited to 'keyboards/amj96/matrix.c')

diff --git a/keyboards/amj96/matrix.c b/keyboards/amj96/matrix.c
new file mode 100644
index 000000000..e41bbec72
--- /dev/null
+++ b/keyboards/amj96/matrix.c
@@ -0,0 +1,222 @@
+/*
+Copyright 2014 Kai Ryu <kai1103@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"
+#ifdef UART_RGB_ENABLE
+#include "uart_rgb.h"
+#endif
+
+#ifndef DEBOUNCE
+#   define DEBOUNCE 5
+#endif
+static uint8_t debouncing = DEBOUNCE;
+
+/* matrix state(1:on, 0:off) */
+static matrix_row_t matrix[MATRIX_ROWS];
+static matrix_row_t matrix_debouncing[MATRIX_ROWS];
+
+static matrix_row_t read_cols(void);
+static void init_cols(void);
+static void init_rows(void);
+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)
+{
+
+#ifdef UART_RGB_ENABLE
+    uart_rgb_init();
+#endif
+    // disable JTAG
+    MCUCR = _BV(JTD);
+    MCUCR = _BV(JTD);
+
+    // 85 REST
+    DDRD |= _BV(PD7);
+    PORTD |= _BV(PD7);
+
+    // initialize row and col
+    init_rows();
+    init_cols();
+
+    // initialize matrix state: all keys off
+    for (uint8_t i=0; i < MATRIX_ROWS; i++) {
+        matrix[i] = 0;
+        matrix_debouncing[i] = 0;
+    }
+}
+
+uint8_t matrix_scan(void)
+{
+    for (uint8_t i = 0; i < MATRIX_ROWS; i++) {
+        select_row(i);
+        _delay_us(30);  // without this wait read unstable value.
+        matrix_row_t cols = read_cols();
+        if (matrix_debouncing[i] != cols) {
+            matrix_debouncing[i] = cols;
+            if (debouncing) {
+                debug("bounce!: "); debug_hex(debouncing); debug("\n");
+            }
+            debouncing = DEBOUNCE;
+        }
+        unselect_rows();
+    }
+
+    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++) {
+        phex(row); print(": ");
+        pbin_reverse16(matrix_get_row(row));
+        print("\n");
+    }
+}
+
+uint8_t matrix_key_count(void)
+{
+    uint8_t count = 0;
+    for (uint8_t i = 0; i < MATRIX_ROWS; i++) {
+        count += bitpop16(matrix[i]);
+    }
+    return count;
+}
+
+/* Column pin configuration
+ * col: 0   1   2   3   4   5   6   7   8   9   10  11  12  13  14  15
+ * pin: F7  F6  F5  F4  F1  F0  E6  D7  D6  D5  D1  D0  B7  B6  B0  C7
+ * */
+static void  init_cols(void)
+{
+    // Input with pull-up(DDR:0, PORT:1)
+    DDRF &= 0b00001100;
+    PORTF |= 0b11110011;
+
+    DDRD &= 0b00011100;
+    PORTD |= 0b11100011;
+
+    DDRB &= ~(_BV(PB6) | _BV(PB7)| _BV(PB0));
+    PORTB |= (_BV(PB6) | _BV(PB7)| _BV(PB0));
+
+    DDRE &= ~_BV(PE6);
+    PORTE |= _BV(PE6);
+
+    DDRC &= ~_BV(PC7);
+    PORTC |= _BV(PC7);
+
+}
+
+static matrix_row_t read_cols(void)
+{
+
+    return (PINF&_BV(PF7) ? 0 : (1<<0)) |
+           (PINF&_BV(PF6) ? 0 : (1<<1)) |
+           (PINF&_BV(PF5) ? 0 : (1<<2)) |
+           (PINF&_BV(PF4) ? 0 : (1<<3)) |
+           (PINF&_BV(PF1) ? 0 : (1<<4)) |
+           (PINF&_BV(PF0) ? 0 : (1<<5)) |
+           (PINE&_BV(PE6) ? 0 : (1<<6)) |
+           (PIND&_BV(PD7) ? 0 : (1<<7)) |
+           (PIND&_BV(PD6) ? 0 : (1<<8)) |
+           (PIND&_BV(PD5) ? 0 : (1<<9)) |
+           (PIND&_BV(PD1) ? 0 : (1<<10)) |
+           (PIND&_BV(PD0) ? 0 : (1<<11)) |
+           (PINB&_BV(PB7) ? 0 : (1<<12)) |
+           (PINB&_BV(PB6) ? 0 : (1<<13)) |
+           (PINB&_BV(PB0) ? 0 : (1<<14)) |
+           (PINC&_BV(PC7) ? 0 : (1<<15));
+}
+
+/* Row pin configuration
+ * row:     0   1   2   3   4   5   x
+ * pin: B3  0   1   0   1   0   1   1
+ *      B2  0   0   1   1   0   0   1
+ *      B1  0   0   0   0   1   1   1
+ */
+
+static void init_rows(void)
+{
+     DDRB  |= (1<<PB1 | 1<<PB2 | 1<<PB3);
+}
+
+static void unselect_rows(void)
+{
+    // Hi-Z(DDR:0, PORT:0) to unselect
+    PORTB |= (1<<PB1);
+    PORTB |= (1<<PB2);
+    PORTB |= (1<<PB3);
+}
+
+static void select_row(uint8_t row)
+{
+    // Output low(DDR:1, PORT:0) to select
+    (row & (1<<0)) ? (PORTB |= (1<<PB3)) : (PORTB &= ~(1<<PB3));
+    (row & (1<<1)) ? (PORTB |= (1<<PB2)) : (PORTB &= ~(1<<PB2));
+    (row & (1<<2)) ? (PORTB |= (1<<PB1)) : (PORTB &= ~(1<<PB1));
+}
-- 
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