1 files changed, 258 insertions, 0 deletions

diff --git a/keyboards/duck/eagle_viper/v2/matrix.c b/keyboards/duck/eagle_viper/v2/matrix.c
new file mode 100644
index 000000000..0964493ac
--- /dev/null
+++ b/keyboards/duck/eagle_viper/v2/matrix.c
@@ -0,0 +1,258 @@
+/*
+Copyright 2017 MechMerlin <[email protected]>
+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 <util/delay.h>
+#include <avr/io.h>
+#include <stdio.h>
+#include "matrix.h"
+#include "util.h"
+#include "print.h"
+#include "debug.h"
+
+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 uint8_t read_rows(uint8_t col);
+static void init_rows(void);
+static void unselect_cols(void);
+static void select_col(uint8_t col);
+
+
+__attribute__ ((weak))
+void matrix_init_kb(void) {
+    matrix_init_user();
+}
+
+__attribute__ ((weak))
+void matrix_scan_kb(void) {
+    matrix_scan_user();
+}
+
+__attribute__ ((weak))
+void matrix_init_user(void) {
+}
+
+__attribute__ ((weak))
+void matrix_scan_user(void) {
+}
+
+void backlight_init_ports(void)
+{
+  DDRD  |=  0b11010000;
+  PORTD &= ~0b01010000;
+  PORTD |=  0b10000000;
+  DDRB  |=  0b00011111;
+  PORTB &= ~0b00001110;
+  PORTB |=  0b00010001;
+  DDRE  |=  0b01000000;
+  PORTE &= ~0b01000000;
+}
+
+void matrix_init(void) {
+  backlight_init_ports();
+  unselect_cols();
+  init_rows();
+
+  for (uint8_t i=0; i < MATRIX_ROWS; i++)  {
+    matrix[i] = 0;
+    matrix_debouncing[i] = 0;
+  }
+
+  matrix_init_quantum();
+}
+
+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(col);
+
+    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);
+        if (debouncing) {
+            dprint("bounce!: "); dprintf("%02X", debouncing); dprintln();
+        }
+        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];
+      }
+    }
+  }
+
+  matrix_scan_quantum();
+  return 1;
+}
+
+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)));
+  }
+}
+
+/* Row pin configuration - diode connected
+ * row: 0    1    2    3    4
+ * pin: PD0  PD1  PD2  PD3  PD5
+ *
+ * Caps Lock uses its own pin PE2 on the column pin, row pin is grounded
+ */
+static void init_rows(void) {
+    DDRD  &= ~0b00101111;
+    PORTD &= ~0b00101111;
+
+    DDRE  &= ~0b00000100;
+    PORTE |=  0b00000100;
+}
+
+static uint8_t read_rows(uint8_t col) {
+
+    return (PIND&(1<<0) ? (1<<0) : 0)  |
+            (PIND&(1<<1) ? (1<<1) : 0) |
+            (PIND&(1<<2) ? (1<<2) : 0) |
+            (PIND&(1<<3) ? (1<<3) : 0) |
+            (PIND&(1<<5) ? (1<<4) : 0) |
+            (col==0 ? ((PINE&(1<<2) ? 0 : (1<<2))) : 0);
+    
+}
+
+uint8_t read_fwkey(void)
+{
+  return PINE&(1<<2) ? 0 : (1<<2);
+}
+
+/* Columns 0 - 15
+ *
+ * atmega32u4   decoder    pin
+ *    PC6       U1         E3
+ *    PB6       U2         E3    
+ *    PF0       U1, U2     A0
+ *    PF1       U1, U2     A1
+ *    PC7       U1, U2     A2
+ * 
+ * These columns uses two 74HC237D 3 to 8 bit demultiplexers.
+ * col / pin:    PC6  PB6  PF0  PF1  PC7 Decoder  Pin
+ * 0:             1    0    0    0    0    U1     Y0
+ * 1:             1    0    1    0    0    U1     Y1
+ * 2:             1    0    0    1    0    U1     Y2
+ * 3:             1    0    1    1    0    U1     Y3
+ * 4:             1    0    0    0    1    U1     Y4
+ * 5:             1    0    1    0    1    U1     Y5
+ * 6:             1    0    0    1    1    U1     Y6
+ * 7:             1    0    1    1    1    U1     Y7
+ * 8:             0    1    0    0    0    U2     Y0
+ * 9:             0    1    1    0    0    U2     Y1
+ * 10:            0    1    0    1    0    U2     Y2
+ * 11:            0    1    1    1    0    U2     Y3
+ * 12:            0    1    0    0    1    U2     Y4
+ * 13:            0    1    1    0    1    U2     Y5
+ * 14:            0    1    0    1    1    U2     Y6
+ *
+ */
+static void unselect_cols(void) {
+  DDRB  |=  0b01000000;
+  PORTB &= ~0b01000000;
+
+  DDRC  |=  0b11000000;
+  PORTC &= ~0b11000000;
+
+  DDRF  |=  0b00000011;
+  PORTF &= ~0b00000011;
+}
+
+static void select_col(uint8_t col) {
+ 
+   switch (col) {
+        case 0:
+            PORTC |= 0b01000000;
+            break;
+        case 1:
+            PORTC |= 0b01000000;
+            PORTF |= 0b00000001;
+            break;
+        case 2:
+            PORTC |= 0b01000000;
+            PORTF |= 0b00000010;
+            break;
+        case 3:
+            PORTC |= 0b01000000;
+            PORTF |= 0b00000011;
+            break;
+        case 4:
+            PORTC |= 0b11000000;
+            break;
+        case 5:
+            PORTC |= 0b11000000;
+            PORTF |= 0b00000001;
+            break;
+        case 6:
+            PORTC |= 0b11000000;
+            PORTF |= 0b00000010;
+            break;
+        case 7:
+            PORTC |= 0b11000000;
+            PORTF |= 0b00000011;
+            break;
+        case 8:
+            PORTB |= 0b01000000;
+            break;
+        case 9:
+            PORTB |= 0b01000000;
+            PORTF |= 0b00000001;
+            break;
+        case 10:
+            PORTB |= 0b01000000;
+            PORTF |= 0b00000010;
+            break;
+        case 11:
+            PORTB |= 0b01000000;
+            PORTF |= 0b00000011;
+            break;
+        case 12:
+            PORTB |= 0b01000000;
+            PORTC |= 0b10000000;
+            break;
+        case 13:
+            PORTB |= 0b01000000;
+            PORTF |= 0b00000001;
+            PORTC |= 0b10000000;
+            break;
+        case 14:
+            PORTB |= 0b01000000;
+            PORTF |= 0b00000010;
+            PORTC |= 0b10000000;
+            break;
+    }
+}