1 files changed, 311 insertions, 0 deletions

diff --git a/keyboards/kmac/matrix.c b/keyboards/kmac/matrix.c
new file mode 100644
index 000000000..bab638bdf
--- /dev/null
+++ b/keyboards/kmac/matrix.c
@@ -0,0 +1,311 @@
+/*
+Copyright 2017 Mathias Andersson <wraul@dbox.se>
+
+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>
+#if defined(__AVR__)
+#include <avr/io.h>
+#endif
+#include "wait.h"
+#include "print.h"
+#include "debug.h"
+#include "util.h"
+#include "matrix.h"
+#include "timer.h"
+
+
+/* Set 0 if debouncing isn't needed */
+#ifndef DEBOUNCING_DELAY
+#   define DEBOUNCING_DELAY 5
+#endif
+
+#define COL_SHIFTER ((uint32_t)1)
+
+static uint16_t debouncing_time;
+static bool debouncing = false;
+
+
+static const uint8_t row_pins[MATRIX_ROWS] = MATRIX_ROW_PINS;
+
+/* matrix state(1:on, 0:off) */
+static matrix_row_t matrix[MATRIX_ROWS];
+static matrix_row_t matrix_debouncing[MATRIX_ROWS];
+
+static void init_rows(void);
+static bool read_rows_on_col(matrix_row_t current_matrix[], uint8_t current_col);
+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();
+
+    // initialize matrix state: all keys off
+    for (uint8_t i=0; i < MATRIX_ROWS; i++) {
+        matrix[i] = 0;
+        matrix_debouncing[i] = 0;
+    }
+
+    matrix_init_quantum();
+}
+
+uint8_t matrix_scan(void)
+{
+    // Set col, read rows
+    for (uint8_t current_col = 0; current_col < MATRIX_COLS; current_col++) {
+        bool matrix_changed = read_rows_on_col(matrix_debouncing, current_col);
+        if (matrix_changed) {
+            debouncing = true;
+            debouncing_time = timer_read();
+        }
+    }
+
+    if (debouncing && (timer_elapsed(debouncing_time) > DEBOUNCING_DELAY)) {
+        for (uint8_t i = 0; i < MATRIX_ROWS; i++) {
+            matrix[i] = matrix_debouncing[i];
+        }
+        debouncing = false;
+    }
+
+    matrix_scan_quantum();
+    return 1;
+}
+
+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 0123456789ABCDEFGHIJKLMNOPQRSTUV\n");
+
+    for (uint8_t row = 0; row < MATRIX_ROWS; row++) {
+        phex(row); print(": ");
+        print_bin_reverse32(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 += bitpop32(matrix[i]);
+    }
+    return count;
+}
+
+static bool read_rows_on_col(matrix_row_t current_matrix[], uint8_t current_col)
+{
+    bool matrix_changed = false;
+
+    // Select col and wait for col selecton to stabilize
+    select_col(current_col);
+    wait_us(30);
+
+    // For each row...
+    for(uint8_t row_index = 0; row_index < MATRIX_ROWS; row_index++)
+    {
+        // Store last value of row prior to reading
+        matrix_row_t last_row_value = current_matrix[row_index];
+
+        // Check row pin state
+        // Use the otherwise unused row: 3, col: 0 for caps lock
+        if (row_index == 3 && current_col == 0) {
+            // Pin E2 uses active low
+            if ((_SFR_IO8(E2 >> 4) & _BV(E2 & 0xF)) == 0)
+            {
+                // Pin LO, set col bit
+                current_matrix[row_index] |= (COL_SHIFTER << current_col);
+            }
+            else
+            {
+                // Pin HI, clear col bit
+                current_matrix[row_index] &= ~(COL_SHIFTER << current_col);
+            }
+        }
+        else {
+            if ((_SFR_IO8(row_pins[row_index] >> 4) & _BV(row_pins[row_index] & 0xF)))
+            {
+                // Pin HI, set col bit
+                current_matrix[row_index] |= (COL_SHIFTER << current_col);
+            }
+            else
+            {
+                // Pin LO, clear col bit
+                current_matrix[row_index] &= ~(COL_SHIFTER << current_col);
+            }
+        }
+
+        // Determine if the matrix changed state
+        if ((last_row_value != current_matrix[row_index]) && !(matrix_changed))
+        {
+            matrix_changed = true;
+        }
+    }
+
+    // Unselect cols
+    unselect_cols();
+
+    return matrix_changed;
+}
+
+/* Row pin configuration
+ * row: 0   1   2   3   4   5
+ * pin: D0  D1  D2  D3  D5  B7
+ *
+ * Caps lock uses its own pin E2
+ */
+static void init_rows(void)
+{
+    DDRD  &= ~((1<<0)| (1<<1) | (1<<2) | (1<<3) | (1<<5)); // IN
+    PORTD &= ~((1<<0)| (1<<1) | (1<<2) | (1<<3) | (1<<5)); // LO
+    DDRB  &= ~(1<<7); // IN
+    PORTB &= ~(1<<7); // LO
+
+    DDRE &= ~(1<<2); // IN
+    PORTE |= (1<<2); // HI
+}
+
+/* Columns 0 - 15
+ * These columns uses two 74HC237D 3 to 8 bit demultiplexers.
+ * col / pin:    PC6  PB6  PF0  PF1  PC7
+ * 0:             1    0    0    0    0
+ * 1:             1    0    1    0    0
+ * 2:             1    0    0    1    0
+ * 3:             1    0    1    1    0
+ * 4:             1    0    0    0    1
+ * 5:             1    0    1    0    1
+ * 6:             1    0    0    1    1
+ * 7:             1    0    1    1    1
+ * 8:             0    1    0    0    0
+ * 9:             0    1    1    0    0
+ * 10:            0    1    0    1    0
+ * 11:            0    1    1    1    0
+ * 12:            0    1    0    0    1
+ * 13:            0    1    1    0    1
+ * 14:            0    1    0    1    1
+ * 15:            0    1    1    1    1
+ *
+ * col: 16
+ * pin: PB5
+ */
+static void unselect_cols(void)
+{
+    DDRB  |= (1<<5) | (1<<6); // OUT
+    PORTB &= ~((1<<5) | (1<<6)); // LO
+
+    DDRC  |= (1<<6) | (1<<7); // OUT
+    PORTC &= ~((1<<6) | (1<<7)); // LO
+
+    DDRF  |= (1<<0) | (1<<1); // OUT
+    PORTF &= ~((1<<0) | (1<<1)); // LO
+}
+
+static void select_col(uint8_t col)
+{
+    switch (col) {
+        case 0:
+            PORTC |= (1<<6); // HI
+            break;
+        case 1:
+            PORTC |= (1<<6); // HI
+            PORTF |= (1<<0); // HI
+            break;
+        case 2:
+            PORTC |= (1<<6); // HI
+            PORTF |= (1<<1); // HI
+            break;
+        case 3:
+            PORTC |= (1<<6); // HI
+            PORTF |= (1<<0) | (1<<1); // HI
+            break;
+        case 4:
+            PORTC |= (1<<6); // HI
+            PORTC |= (1<<7); // HI
+            break;
+        case 5:
+            PORTC |= (1<<6); // HI
+            PORTF |= (1<<0); // HI
+            PORTC |= (1<<7); // HI
+            break;
+        case 6:
+            PORTC |= (1<<6); // HI
+            PORTF |= (1<<1); // HI
+            PORTC |= (1<<7); // HI
+            break;
+        case 7:
+            PORTC |= (1<<6); // HI
+            PORTF |= (1<<0) | (1<<1); // HI
+            PORTC |= (1<<7); // HI
+            break;
+        case 8:
+            PORTB |= (1<<6); // HI
+            break;
+        case 9:
+            PORTB |= (1<<6); // HI
+            PORTF |= (1<<0); // HI
+            break;
+        case 10:
+            PORTB |= (1<<6); // HI
+            PORTF |= (1<<1); // HI
+            break;
+        case 11:
+            PORTB |= (1<<6); // HI
+            PORTF |= (1<<0) | (1<<1); // HI
+            break;
+        case 12:
+            PORTB |= (1<<6); // HI
+            PORTC |= (1<<7); // HI
+            break;
+        case 13:
+            PORTB |= (1<<6); // HI
+            PORTF |= (1<<0); // HI
+            PORTC |= (1<<7); // HI
+            break;
+        case 14:
+            PORTB |= (1<<6); // HI
+            PORTF |= (1<<1); // HI
+            PORTC |= (1<<7); // HI
+            break;
+        case 15:
+            PORTB |= (1<<6); // HI
+            PORTF |= (1<<0) | (1<<1); // HI
+            PORTC |= (1<<7); // HI
+            break;
+        case 16:
+            PORTB |= (1<<5); // HI
+            break;
+    }
+}