keyboards/georgi/matrix.c

   1 /*
   2 Note for ErgoDox EZ customizers: Here be dragons!
   3 This is not a file you want to be messing with.
   4 All of the interesting stuff for you is under keymaps/ :)
   5 Love, Erez
   6
   7 Copyright 2013 Oleg Kostyuk <cub.uanic@gmail.com>
   8
   9 This program is free software: you can redistribute it and/or modify
  10 it under the terms of the GNU General Public License as published by
  11 the Free Software Foundation, either version 2 of the License, or
  12 (at your option) any later version.
  13
  14 This program is distributed in the hope that it will be useful,
  15 but WITHOUT ANY WARRANTY; without even the implied warranty of
  16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17 GNU General Public License for more details.
  18
  19 You should have received a copy of the GNU General Public License
  20 along with this program.  If not, see <http://www.gnu.org/licenses/>.
  21 */
  22
  23 #include "matrix.h"
  24 #include <stdint.h>
  25 #include <stdbool.h>
  26 #include <avr/io.h>
  27 #include "wait.h"
  28 #include "action_layer.h"
  29 #include "print.h"
  30 #include "debug.h"
  31 #include "util.h"
  32 #include "keymap_steno.h"
  33 #include QMK_KEYBOARD_H
  34 #ifdef DEBUG_MATRIX_SCAN_RATE
  35 #include  "timer.h"
  36 #endif
  37
  38
  39 #ifndef DEBOUNCE
  40 #   define DEBOUNCE     5
  41 #endif
  42
  43 // MCP Pin Defs
  44 #define RROW1 (1<<3)
  45 #define RROW2 (1<<2)
  46 #define RROW3 (1<<1)
  47 #define RROW4 (1<<0)
  48 #define COL0 (1<<0)
  49 #define COL1 (1<<1)
  50 #define COL2 (1<<2)
  51 #define COL3 (1<<3)
  52 #define COL4 (1<<4)
  53 #define COL5 (1<<5)
  54 #define COL6 (1<<6)
  55
  56 // ATmega pin defs
  57 #define ROW1  (1<<6)
  58 #define ROW2  (1<<5)
  59 #define ROW3  (1<<4)
  60 #define ROW4  (1<<1)
  61 #define COL7 (1<<0)
  62 #define COL8 (1<<1)
  63 #define COL9 (1<<2)
  64 #define COL10 (1<<3)
  65 #define COL11 (1<<2)
  66 #define COL12 (1<<3)
  67 #define COL13 (1<<6)
  68
  69
  70 // bit masks
  71 #define BMASK     (COL7 | COL8 | COL9 | COL10)
  72 #define CMASK     (COL13)
  73 #define DMASK     (COL11 | COL12)
  74 #define FMASK     (ROW1 | ROW2 | ROW3 | ROW4)
  75 #define RROWMASK  (RROW1 | RROW2 | RROW3 | RROW4)
  76 #define MCPMASK   (COL0 | COL1 | COL2 | COL3 | COL4 | COL5 | COL6)
  77
  78 /* matrix state(1:on, 0:off) */
  79 static matrix_row_t matrix[MATRIX_ROWS];
  80 /*
  81  * matrix state(1:on, 0:off)
  82  * contains the raw values without debounce filtering of the last read cycle.
  83  */
  84 static matrix_row_t raw_matrix[MATRIX_ROWS];
  85
  86 // Debouncing: store for each key the number of scans until it's eligible to
  87 // change.  When scanning the matrix, ignore any changes in keys that have
  88 // already changed in the last DEBOUNCE scans.
  89 static uint8_t debounce_matrix[MATRIX_ROWS * MATRIX_COLS];
  90
  91 static matrix_row_t read_cols(uint8_t row);
  92 static void init_cols(void);
  93 static void unselect_rows(void);
  94 static void select_row(uint8_t row);
  95
  96 static uint8_t mcp23018_reset_loop;
  97 // static uint16_t mcp23018_reset_loop;
  98
  99 #ifdef DEBUG_MATRIX_SCAN_RATE
 100 uint32_t matrix_timer;
 101 uint32_t matrix_scan_count;
 102 #endif
 103
 104
 105 __attribute__ ((weak))
 106 void matrix_init_user(void) {}
 107
 108 __attribute__ ((weak))
 109 void matrix_scan_user(void) {}
 110
 111 __attribute__ ((weak))
 112 void matrix_init_kb(void) {
 113   matrix_init_user();
 114 }
 115
 116 __attribute__ ((weak))
 117 void matrix_scan_kb(void) {
 118   matrix_scan_user();
 119 }
 120
 121 inline
 122 uint8_t matrix_rows(void)
 123 {
 124     return MATRIX_ROWS;
 125 }
 126
 127 inline
 128 uint8_t matrix_cols(void)
 129 {
 130     return MATRIX_COLS;
 131 }
 132
 133
 134 void matrix_init(void)
 135 {
 136     // initialize row and col
 137     mcp23018_status = init_mcp23018();
 138     unselect_rows();
 139     init_cols();
 140
 141     // initialize matrix state: all keys off
 142     for (uint8_t i=0; i < MATRIX_ROWS; i++) {
 143         matrix[i] = 0;
 144         raw_matrix[i] = 0;
 145         for (uint8_t j=0; j < MATRIX_COLS; ++j) {
 146             debounce_matrix[i * MATRIX_COLS + j] = 0;
 147         }
 148     }
 149
 150 #ifdef DEBUG_MATRIX_SCAN_RATE
 151     matrix_timer = timer_read32();
 152     matrix_scan_count = 0;
 153 #endif
 154     matrix_init_quantum();
 155 }
 156
 157 void matrix_power_up(void) {
 158     mcp23018_status = init_mcp23018();
 159
 160     unselect_rows();
 161     init_cols();
 162
 163     // initialize matrix state: all keys off
 164     for (uint8_t i=0; i < MATRIX_ROWS; i++) {
 165         matrix[i] = 0;
 166     }
 167
 168 #ifdef DEBUG_MATRIX_SCAN_RATE
 169     matrix_timer = timer_read32();
 170     matrix_scan_count = 0;
 171 #endif
 172
 173 }
 174
 175 // Returns a matrix_row_t whose bits are set if the corresponding key should be
 176 // eligible to change in this scan.
 177 matrix_row_t debounce_mask(matrix_row_t rawcols, uint8_t row) {
 178   matrix_row_t result = 0;
 179   matrix_row_t change = rawcols ^ raw_matrix[row];
 180   raw_matrix[row] = rawcols;
 181   for (uint8_t i = 0; i < MATRIX_COLS; ++i) {
 182     if (debounce_matrix[row * MATRIX_COLS + i]) {
 183       --debounce_matrix[row * MATRIX_COLS + i];
 184     } else {
 185       result |= (1 << i);
 186     }
 187     if (change & (1 << i)) {
 188       debounce_matrix[row * MATRIX_COLS + i] = DEBOUNCE;
 189     }
 190   }
 191   return result;
 192 }
 193
 194 matrix_row_t debounce_read_cols(uint8_t row) {
 195   // Read the row without debouncing filtering and store it for later usage.
 196   matrix_row_t cols = read_cols(row);
 197   // Get the Debounce mask.
 198   matrix_row_t mask = debounce_mask(cols, row);
 199   // debounce the row and return the result.
 200   return (cols & mask) | (matrix[row] & ~mask);;
 201 }
 202
 203 uint8_t matrix_scan(void)
 204 {
 205   // Then the keyboard
 206   if (mcp23018_status) { // if there was an error
 207       if (++mcp23018_reset_loop == 0) {
 208       // if (++mcp23018_reset_loop >= 1300) {
 209           // since mcp23018_reset_loop is 8 bit - we'll try to reset once in 255 matrix scans
 210           // this will be approx bit more frequent than once per second
 211           print("trying to reset mcp23018\n");
 212           mcp23018_status = init_mcp23018();
 213           if (mcp23018_status) {
 214               print("left side not responding\n");
 215           } else {
 216               print("left side attached\n");
 217           }
 218       }
 219   }
 220
 221 #ifdef DEBUG_MATRIX_SCAN_RATE
 222     matrix_scan_count++;
 223     uint32_t timer_now = timer_read32();
 224     if (TIMER_DIFF_32(timer_now, matrix_timer)>1000) {
 225         print("matrix scan frequency: ");
 226         pdec(matrix_scan_count);
 227         print("\n");
 228
 229         matrix_timer = timer_now;
 230         matrix_scan_count = 0;
 231     }
 232 #endif
 233     for (uint8_t i = 0; i < MATRIX_ROWS_PER_SIDE; i++) {
 234         select_row(i);
 235         // and select on left hand
 236         select_row(i + MATRIX_ROWS_PER_SIDE);
 237         // we don't need a 30us delay anymore, because selecting a
 238         // left-hand row requires more than 30us for i2c.
 239
 240         // grab cols from left hand
 241         matrix[i] = debounce_read_cols(i);
 242         // grab cols from right hand
 243         matrix[i + MATRIX_ROWS_PER_SIDE] = debounce_read_cols(i + MATRIX_ROWS_PER_SIDE);
 244
 245         unselect_rows();
 246     }
 247
 248     matrix_scan_quantum();
 249
 250 #ifdef DEBUG_MATRIX
 251     for (uint8_t c = 0; c < MATRIX_COLS; c++)
 252                 for (uint8_t r = 0; r < MATRIX_ROWS; r++)
 253                   if (matrix_is_on(r, c)) xprintf("r:%d c:%d \n", r, c);
 254 #endif
 255
 256     return 1;
 257 }
 258
 259 bool matrix_is_modified(void) // deprecated and evidently not called.
 260 {
 261     return true;
 262 }
 263
 264 inline
 265 bool matrix_is_on(uint8_t row, uint8_t col)
 266 {
 267     return (matrix[row] & ((matrix_row_t)1<<col));
 268 }
 269
 270 inline
 271 matrix_row_t matrix_get_row(uint8_t row)
 272 {
 273     return matrix[row];
 274 }
 275
 276 void matrix_print(void)
 277 {
 278     print("\nr/c 0123456789ABCDEF\n");
 279     for (uint8_t row = 0; row < MATRIX_ROWS; row++) {
 280         phex(row); print(": ");
 281         pbin_reverse16(matrix_get_row(row));
 282         print("\n");
 283     }
 284 }
 285
 286 uint8_t matrix_key_count(void)
 287 {
 288     uint8_t count = 0;
 289     for (uint8_t i = 0; i < MATRIX_ROWS; i++) {
 290         count += bitpop16(matrix[i]);
 291     }
 292     return count;
 293 }
 294
 295 // Remember this means ROWS
 296 static void  init_cols(void)
 297 {
 298     // init on mcp23018
 299     // not needed, already done as part of init_mcp23018()
 300
 301     // Input with pull-up(DDR:0, PORT:1)
 302     DDRF  &= ~FMASK;
 303     PORTF |=  FMASK;
 304 }
 305
 306 static matrix_row_t read_cols(uint8_t row)
 307 {
 308     if (row < 7) {
 309         if (mcp23018_status) { // if there was an error
 310             return 0;
 311         } else {
 312             uint8_t data = 0;
 313             mcp23018_status = i2c_start(I2C_ADDR_WRITE, ERGODOX_EZ_I2C_TIMEOUT);    if (mcp23018_status) goto out;
 314             mcp23018_status = i2c_write(GPIOB, ERGODOX_EZ_I2C_TIMEOUT);             if (mcp23018_status) goto out;
 315             mcp23018_status = i2c_start(I2C_ADDR_READ, ERGODOX_EZ_I2C_TIMEOUT);     if (mcp23018_status) goto out;
 316             mcp23018_status = i2c_read_nack(ERGODOX_EZ_I2C_TIMEOUT);                if (mcp23018_status < 0) goto out;
 317             data = ~((uint8_t)mcp23018_status);
 318             mcp23018_status = I2C_STATUS_SUCCESS;
 319         out:
 320             i2c_stop();
 321
 322 #ifdef DEBUG_MATRIX
 323             if (data != 0x00) xprintf("I2C: %d\n", data);
 324 #endif
 325             return data;
 326         }
 327     } else {
 328          /* read from teensy
 329                 * bitmask is 0b0111001, but we want the lower four
 330                 * we'll return 1s for the top two, but that's harmless.
 331                 */
 332         // So I need to confuckulate all this
 333         //return ~(((PIND & DMASK) >> 1  | ((PINC & CMASK) >> 6) | (PIN)));
 334         //return ~((PINF & 0x03) | ((PINF & 0xF0) >> 2));
 335         return ~(
 336            (((PINF & ROW4) >> 1)
 337           | ((PINF & (ROW1 | ROW2 | ROW3)) >> 3))
 338         & 0xF);
 339     }
 340 }
 341
 342 // Row pin configuration
 343 static void unselect_rows(void)
 344 {
 345     // no need to unselect on mcp23018, because the select step sets all
 346     // the other row bits high, and it's not changing to a different
 347     // direction
 348     // Hi-Z(DDR:0, PORT:0) to unselect
 349     DDRB  &= ~(BMASK);
 350     PORTB &= ~(BMASK);
 351     DDRC  &= ~CMASK;
 352     PORTC &= ~CMASK;
 353     DDRD  &= ~DMASK;
 354     PORTD &= ~DMASK;
 355 }
 356
 357 static void select_row(uint8_t row)
 358 {
 359     if (row < 7) {
 360         // select on mcp23018
 361         if (mcp23018_status) { // do nothing on error
 362         } else { // set active row low  : 0 // set other rows hi-Z : 1
 363             mcp23018_status = i2c_start(I2C_ADDR_WRITE, ERGODOX_EZ_I2C_TIMEOUT);        if (mcp23018_status) goto out;
 364             mcp23018_status = i2c_write(GPIOA, ERGODOX_EZ_I2C_TIMEOUT);                 if (mcp23018_status) goto out;
 365             mcp23018_status = i2c_write(0xFF & ~(1<<row), ERGODOX_EZ_I2C_TIMEOUT);      if (mcp23018_status) goto out;
 366         out:
 367             i2c_stop();
 368         }
 369     } else {
 370         // Output low(DDR:1, PORT:0) to select
 371         switch (row) {
 372             case 7:
 373                 DDRB  |= COL7;
 374                 PORTB &= ~COL7;
 375                 break;
 376             case 8:
 377                 DDRB  |= COL8;
 378                 PORTB &= ~COL8;
 379                 break;
 380             case 9:
 381                 DDRB  |= COL9;
 382                 PORTB &= ~COL9;
 383                 break;
 384             case 10:
 385                 DDRB  |= COL10;
 386                 PORTB &= ~COL10;
 387                 break;
 388             case 11:
 389                 DDRD  |= COL11;
 390                 PORTD &= ~COL11;
 391                 break;
 392             case 12:
 393                 DDRD  |= COL12;
 394                 PORTD &= ~COL12;
 395                 break;
 396             case 13:
 397                 DDRC  |= COL13;
 398                 PORTC &= ~COL13;
 399                 break;
 400         }
 401     }
 402 }