From 04885a3b447c82437d919d467328800eb00af629 Mon Sep 17 00:00:00 2001
From: Jack Humbert <jack.humb@gmail.com>
Date: Fri, 21 Aug 2015 10:46:53 -0400
Subject: preonic

---
 keyboard/preonic/matrix.c | 234 ++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 234 insertions(+)
 create mode 100644 keyboard/preonic/matrix.c

(limited to 'keyboard/preonic/matrix.c')

diff --git a/keyboard/preonic/matrix.c b/keyboard/preonic/matrix.c
new file mode 100644
index 0000000000..98ef55ed68
--- /dev/null
+++ b/keyboard/preonic/matrix.c
@@ -0,0 +1,234 @@
+/*
+Copyright 2012 Jun Wako 
+Generated by planckkeyboard.com (2014 Jack Humbert)
+
+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"
+
+#ifndef DEBOUNCE
+#   define DEBOUNCE 10
+#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 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)
+{
+    // To use PORTF disable JTAG with writing JTD bit twice within four cycles.
+    MCUCR |= (1<<JTD);
+    MCUCR |= (1<<JTD);
+
+    backlight_init_ports();
+
+    // Turn status LED on
+    DDRE |= (1<<6);
+    PORTE |= (1<<6);
+
+    // initialize row and col
+    unselect_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;
+}
+
+static void init_cols(void)
+{
+    int B = 0, C = 0, D = 0, E = 0, F = 0;
+    for(int x = 0; x < MATRIX_COLS; x++) { 
+        int col = COLS[x];
+        if ((col & 0xF0) == 0x20) { 
+            B |= (1<<(col & 0x0F)); 
+        } else if ((col & 0xF0) == 0x30) { 
+            C |= (1<<(col & 0x0F)); 
+        } else if ((col & 0xF0) == 0x40) { 
+            D |= (1<<(col & 0x0F)); 
+        } else if ((col & 0xF0) == 0x50) { 
+            E |= (1<<(col & 0x0F)); 
+        } else if ((col & 0xF0) == 0x60) { 
+            F |= (1<<(col & 0x0F)); 
+        } 
+    }
+    DDRB &= ~(B); PORTB |= (B);
+    DDRC &= ~(C); PORTC |= (C); 
+    DDRD &= ~(D); PORTD |= (D);
+    DDRE &= ~(E); PORTE |= (E);
+    DDRF &= ~(F); PORTF |= (F);
+}
+
+static matrix_row_t read_cols(void)
+{
+    matrix_row_t result = 0;
+    for(int x = 0; x < MATRIX_COLS; x++) {     
+        int col = COLS[x];
+        if ((col & 0xF0) == 0x20) { 
+            result |= (PINB&(1<<(col & 0x0F)) ? 0 : (1<<x)); 
+        } else if ((col & 0xF0) == 0x30) { 
+            result |= (PINC&(1<<(col & 0x0F)) ? 0 : (1<<x)); 
+        } else if ((col & 0xF0) == 0x40) { 
+            result |= (PIND&(1<<(col & 0x0F)) ? 0 : (1<<x)); 
+        } else if ((col & 0xF0) == 0x50) { 
+            result |= (PINE&(1<<(col & 0x0F)) ? 0 : (1<<x)); 
+        } else if ((col & 0xF0) == 0x60) { 
+            result |= (PINF&(1<<(col & 0x0F)) ? 0 : (1<<x)); 
+        } 
+    }
+    return result;
+}
+
+static void unselect_rows(void)
+{
+    int B = 0, C = 0, D = 0, E = 0, F = 0;
+    for(int x = 0; x < MATRIX_ROWS; x++) { 
+        int row = ROWS[x];
+        if ((row & 0xF0) == 0x20) { 
+            B |= (1<<(row & 0x0F)); 
+        } else if ((row & 0xF0) == 0x30) { 
+            C |= (1<<(row & 0x0F)); 
+        } else if ((row & 0xF0) == 0x40) { 
+            D |= (1<<(row & 0x0F)); 
+        } else if ((row & 0xF0) == 0x50) { 
+            E |= (1<<(row & 0x0F)); 
+        } else if ((row & 0xF0) == 0x60) { 
+            F |= (1<<(row & 0x0F)); 
+        } 
+    }
+    DDRB &= ~(B); PORTB |= (B);
+    DDRC &= ~(C); PORTC |= (C); 
+    DDRD &= ~(D); PORTD |= (D);
+    DDRE &= ~(E); PORTE |= (E);
+    DDRF &= ~(F); PORTF |= (F);
+}
+
+static void select_row(uint8_t row)
+{
+    int row_pin = ROWS[row];
+    if ((row_pin & 0xF0) == 0x20) { 
+        DDRB  |= (1<<(row_pin & 0x0F));
+        PORTB &= ~(1<<(row_pin & 0x0F));
+    } else if ((row_pin & 0xF0) == 0x30) { 
+        DDRC  |= (1<<(row_pin & 0x0F));
+        PORTC &= ~(1<<(row_pin & 0x0F));
+    } else if ((row_pin & 0xF0) == 0x40) { 
+        DDRD  |= (1<<(row_pin & 0x0F));
+        PORTD &= ~(1<<(row_pin & 0x0F));
+    } else if ((row_pin & 0xF0) == 0x50) { 
+        DDRE  |= (1<<(row_pin & 0x0F));
+        PORTE &= ~(1<<(row_pin & 0x0F));
+    } else if ((row_pin & 0xF0) == 0x60) { 
+        DDRF  |= (1<<(row_pin & 0x0F));
+        PORTF &= ~(1<<(row_pin & 0x0F));
+    }  
+}
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