keyboards/duck/octagon/v1/matrix.c

   1 /*
   2 Copyright 2017 MechMerlin <mechmerlin@gmail.com>
   3 This program is free software: you can redistribute it and/or modify
   4 it under the terms of the GNU General Public License as published by
   5 the Free Software Foundation, either version 2 of the License, or
   6 (at your option) any later version.
   7
   8 This program is distributed in the hope that it will be useful,
   9 but WITHOUT ANY WARRANTY; without even the implied warranty of
  10 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  11 GNU General Public License for more details.
  12
  13 You should have received a copy of the GNU General Public License
  14 along with this program.  If not, see <http://www.gnu.org/licenses/>.
  15 */
  16
  17 #include <util/delay.h>
  18 #include <avr/io.h>
  19 #include <stdio.h>
  20 #include "matrix.h"
  21 #include "util.h"
  22 #include "print.h"
  23 #include "debug.h"
  24
  25 static uint8_t debouncing = DEBOUNCING_DELAY;
  26
  27 /* matrix state(1:on, 0:off) */
  28 static matrix_row_t matrix[MATRIX_ROWS];
  29 static matrix_row_t matrix_debouncing[MATRIX_ROWS];
  30
  31 static uint8_t read_rows(uint8_t col);
  32 static void init_rows(void);
  33 static void unselect_cols(void);
  34 static void select_col(uint8_t col);
  35
  36
  37 __attribute__ ((weak))
  38 void matrix_init_kb(void) {
  39     matrix_init_user();
  40 }
  41
  42 __attribute__ ((weak))
  43 void matrix_scan_kb(void) {
  44     matrix_scan_user();
  45 }
  46
  47 __attribute__ ((weak))
  48 void matrix_init_user(void) {
  49 }
  50
  51 __attribute__ ((weak))
  52 void matrix_scan_user(void) {
  53 }
  54
  55 void backlight_init_ports(void)
  56 {
  57     DDRB |= 0b00011111;  // PB0 (caps), PB1 (alpha), PB2 (extra), PB3 (modnum), PB4 (caps)
  58     DDRD |= 0b11010000;  // PD4, (rgb blue), PD6 (rgb red), PD7 (rgb green)
  59     DDRE |= 0b01000000;  // PE6 (frow)
  60 }
  61
  62 void matrix_init(void) {
  63   backlight_init_ports();
  64   unselect_cols();
  65   init_rows();
  66
  67   for (uint8_t i=0; i < MATRIX_ROWS; i++)  {
  68     matrix[i] = 0;
  69     matrix_debouncing[i] = 0;
  70   }
  71
  72   matrix_init_quantum();
  73 }
  74
  75 uint8_t matrix_scan(void) {
  76   for (uint8_t col = 0; col < MATRIX_COLS; col++) {
  77     select_col(col);
  78     _delay_us(3);
  79
  80     uint8_t rows = read_rows(col);
  81
  82     for (uint8_t row = 0; row < MATRIX_ROWS; row++) {
  83       bool prev_bit = matrix_debouncing[row] & ((matrix_row_t)1<<col);
  84       bool curr_bit = rows & (1<<row);
  85       if (prev_bit != curr_bit) {
  86         matrix_debouncing[row] ^= ((matrix_row_t)1<<col);
  87         if (debouncing) {
  88             dprint("bounce!: "); dprintf("%02X", debouncing); dprintln();
  89         }
  90         debouncing = DEBOUNCING_DELAY;
  91       }
  92     }
  93     unselect_cols();
  94   }
  95
  96   if (debouncing) {
  97     if (--debouncing) {
  98       _delay_ms(1);
  99     } else {
 100       for (uint8_t i = 0; i < MATRIX_ROWS; i++) {
 101         matrix[i] = matrix_debouncing[i];
 102       }
 103     }
 104   }
 105
 106   matrix_scan_quantum();
 107   return 1;
 108 }
 109
 110 inline matrix_row_t matrix_get_row(uint8_t row) {
 111   return matrix[row];
 112 }
 113
 114 void matrix_print(void) {
 115   print("\nr/c 0123456789ABCDEF\n");
 116   for (uint8_t row = 0; row < MATRIX_ROWS; row++) {
 117     xprintf("%02X: %032lb\n", row, bitrev32(matrix_get_row(row)));
 118   }
 119 }
 120
 121 /* Row pin configuration
 122  * row: 0    1    2    3    4    5
 123  * pin: PB7  PD0  PD1  PD2  PD3  PD5
 124  *
 125  * Esc uses its own pin PE2
 126  */
 127 static void init_rows(void) {
 128     DDRD  &= ~0b00101111; // PD0, PD1, PD2, PD3, PD5 input
 129     PORTD &= ~0b00101111; // PD0, PD1, PD2, PD3, PD5 low
 130
 131     DDRB  &= ~0b10000000; // PB7 input
 132     PORTB &= ~0b10000000; // PB7 low
 133
 134     DDRE  &= ~0b00000100; // PE2 input
 135     PORTE |=  0b00000100; // PE2 high
 136 }
 137
 138 static uint8_t read_rows(uint8_t col) {
 139   if (col == 14) {
 140     return PINE&(1<<2) ? 0 : (1<<0);        // PE2 (Row 0)
 141   } else {
 142       return (PIND&(1<<0) ? (1<<0) : 0) |   // PD0 (Row 0)
 143              (PIND&(1<<1) ? (1<<1) : 0) |   // PD1 (Row 1)
 144              (PIND&(1<<2) ? (1<<2) : 0) |   // PD2 (Row 2)
 145              (PIND&(1<<3) ? (1<<3) : 0) |   // PD3 (Row 3)
 146              (PIND&(1<<5) ? (1<<4) : 0) |   // PD5 (Row 4)
 147              (PINB&(1<<7) ? (1<<5) : 0);    // PB7 (Row 5)
 148     }
 149 }
 150
 151 uint8_t read_fwkey(void)
 152 {
 153   return PINE&(1<<2) ? 0 : (1<<0);
 154 }
 155
 156 static void unselect_cols(void) {
 157     DDRB  |=  0b01000000; // PB6 (U2) output
 158     PORTB &= ~0b01000000; // PB6 (U2) low
 159
 160     DDRC  |=  0b11000000; // PC6 (U1), PC7 (A2) output
 161     PORTC &= ~0b11000000; // PC6 (U1), PC7 (A2) low
 162
 163     DDRF  |=  0b00000011; // PF0 (A0), PF1 (A1) output
 164     PORTF &= ~0b00000011; // PF0 (A0), PF1 (A1) low
 165 }
 166
 167 static void select_col(uint8_t col) {
 168
 169    switch (col) {
 170         case 0:
 171             PORTC |= 0b01000000; // PC6 high
 172             break;
 173         case 1:
 174             PORTC |= 0b01000000; // PC6 high
 175             PORTF |= 0b00000001; // PF0 high
 176             break;
 177         case 2:
 178             PORTC |= 0b01000000; // PC6 high
 179             PORTF |= 0b00000010; // PF1 high
 180             break;
 181         case 3:
 182             PORTC |= 0b01000000; // PC6 high
 183             PORTF |= 0b00000011; // PF0, PF1 high
 184             break;
 185         case 4:
 186             PORTC |= 0b11000000; // PC6, PC7 high
 187             break;
 188         case 5:
 189             PORTC |= 0b11000000; // PC6, PC7 high
 190             PORTF |= 0b00000001; // PF0 high
 191             break;
 192         case 6:
 193             PORTC |= 0b11000000; // PC6, PC7 high
 194             PORTF |= 0b00000010; // PF1 high
 195             break;
 196         case 7:
 197             PORTC |= 0b11000000; // PC6, PC7 high
 198             PORTF |= 0b00000011; // PF0, PF1 high
 199             break;
 200         case 8:
 201             PORTB |= 0b01000000; // PB6 high
 202             break;
 203         case 9:
 204             PORTB |= 0b01000000; // PB6 high
 205             PORTF |= 0b00000001; // PF0 high
 206             break;
 207         case 10:
 208             PORTB |= 0b01000000; // PB6 high
 209             PORTF |= 0b00000010; // PF1 high
 210             break;
 211         case 11:
 212             PORTB |= 0b01000000; // PB6 high
 213             PORTF |= 0b00000011; // PF0, PF1 high
 214             break;
 215         case 12:
 216             PORTB |= 0b01000000; // PB6 high
 217             PORTC |= 0b10000000; // PC7 high
 218             break;
 219         case 13:
 220             PORTB |= 0b01000000; // PB6 high
 221             PORTF |= 0b00000001; // PF0 high
 222             PORTC |= 0b10000000; // PC7 high
 223             break;
 224         case 15:
 225             PORTB |= 0b01000000; // PB6 high
 226             PORTF |= 0b00000010; // PF1 high
 227             PORTC |= 0b10000000; // PC7 high
 228             break;
 229     }
 230 }