qmk_firmware

matrix.c (7819B)

---

 /*
 
 Copyright 2013 Oleg Kostyuk <cub.uanic@gmail.com>
 
 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 "matrix.h"
 #include "wait.h"
 #include "debug.h"
 #include "util.h"
 #include "ergotaco.h"
 
 #ifndef DEBOUNCE
 #   define DEBOUNCE	5
 #endif
 
 // ATmega pin defs
 #define ROW1  (1<<5)
 #define COL6  (1<<0)
 #define COL7  (1<<1)
 #define COL8  (1<<2)
 #define COL9  (1<<3)
 #define COL10 (1<<2)
 #define COL11 (1<<3)
 
 
 // bit masks
 #define BMASK     (COL7 | COL8 | COL9 | COL6)
 #define DMASK     (COL10 | COL11)
 #define FMASK     (ROW1)
 
 /* matrix state(1:on, 0:off) */
 static matrix_row_t matrix[MATRIX_ROWS];
 /*
  * matrix state(1:on, 0:off)
  * contains the raw values without debounce filtering of the last read cycle.
  */
 static matrix_row_t raw_matrix[MATRIX_ROWS];
 
 // Debouncing: store for each key the number of scans until it's eligible to
 // change.  When scanning the matrix, ignore any changes in keys that have
 // already changed in the last DEBOUNCE scans.
 static uint8_t debounce_matrix[MATRIX_ROWS * MATRIX_COLS];
 
 static matrix_row_t read_cols(uint8_t row);
 static void init_cols(void);
 static void unselect_rows(void);
 static void select_row(uint8_t row);
 
 static uint8_t mcp23018_reset_loop;
 // static uint16_t mcp23018_reset_loop;
 
 __attribute__ ((weak))
 void matrix_init_user(void) {}
 
 __attribute__ ((weak))
 void matrix_scan_user(void) {}
 
 __attribute__ ((weak))
 void matrix_init_kb(void) {
   matrix_init_user();
 }
 
 __attribute__ ((weak))
 void matrix_scan_kb(void) {
   matrix_scan_user();
 }
 
 inline
 uint8_t matrix_rows(void)
 {
     return MATRIX_ROWS;
 }
 
 inline
 uint8_t matrix_cols(void)
 {
     return MATRIX_COLS;
 }
 
 
 void matrix_init(void)
 {
     // initialize row and col
     mcp23018_status = init_mcp23018();
     unselect_rows();
     init_cols();
 
     // initialize matrix state: all keys off
     for (uint8_t i=0; i < MATRIX_ROWS; i++) {
         matrix[i] = 0;
         raw_matrix[i] = 0;
         for (uint8_t j=0; j < MATRIX_COLS; ++j) {
             debounce_matrix[i * MATRIX_COLS + j] = 0;
         }
     }
 
     matrix_init_kb();
 }
 
 void matrix_power_up(void) {
     mcp23018_status = init_mcp23018();
 
     unselect_rows();
     init_cols();
 
     // initialize matrix state: all keys off
     for (uint8_t i=0; i < MATRIX_ROWS; i++) {
         matrix[i] = 0;
     }
 }
 
 // Returns a matrix_row_t whose bits are set if the corresponding key should be
 // eligible to change in this scan.
 matrix_row_t debounce_mask(matrix_row_t rawcols, uint8_t row) {
   matrix_row_t result = 0;
   matrix_row_t change = rawcols ^ raw_matrix[row];
   raw_matrix[row] = rawcols;
   for (uint8_t i = 0; i < MATRIX_COLS; ++i) {
     if (debounce_matrix[row * MATRIX_COLS + i]) {
       --debounce_matrix[row * MATRIX_COLS + i];
     } else {
       result |= (1 << i);
     }
     if (change & (1 << i)) {
       debounce_matrix[row * MATRIX_COLS + i] = DEBOUNCE;
     }
   }
   return result;
 }
 
 matrix_row_t debounce_read_cols(uint8_t row) {
   // Read the row without debouncing filtering and store it for later usage.
   matrix_row_t cols = read_cols(row);
   // Get the Debounce mask.
   matrix_row_t mask = debounce_mask(cols, row);
   // debounce the row and return the result.
   return (cols & mask) | (matrix[row] & ~mask);;
 }
 
 uint8_t matrix_scan(void)
 {
   // Then the keyboard
   if (mcp23018_status) { // if there was an error
       if (++mcp23018_reset_loop == 0) {
       // if (++mcp23018_reset_loop >= 1300) {
           // since mcp23018_reset_loop is 8 bit - we'll try to reset once in 255 matrix scans
           // this will be approx bit more frequent than once per second
           print("trying to reset mcp23018\n");
           mcp23018_status = init_mcp23018();
           if (mcp23018_status) {
               print("left side not responding\n");
           } else {
               print("left side attached\n");
           }
       }
   }
 
     for (uint8_t i = 0; i < MATRIX_ROWS_PER_SIDE; i++) {
         select_row(i);
         // and select on left hand
         select_row(i + MATRIX_ROWS_PER_SIDE);
         // we don't need a 30us delay anymore, because selecting a
         // left-hand row requires more than 30us for i2c.
 
         // grab cols from left hand
         matrix[i] = debounce_read_cols(i);
         // grab cols from right hand
         matrix[i + MATRIX_ROWS_PER_SIDE] = debounce_read_cols(i + MATRIX_ROWS_PER_SIDE);
 
         unselect_rows();
     }
 
     matrix_scan_kb();
 
 #ifdef DEBUG_MATRIX
     for (uint8_t c = 0; c < MATRIX_COLS; c++)
 		for (uint8_t r = 0; r < MATRIX_ROWS; r++)
 		  if (matrix_is_on(r, c)) xprintf("r:%d c:%d \n", r, c);
 #endif
 
     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 0123456789ABCDEF\n");
     for (uint8_t row = 0; row < MATRIX_ROWS; row++) {
         print_hex8(row); print(": ");
         print_bin_reverse16(matrix_get_row(row));
         print("\n");
     }
 }
 
 // Remember this means ROWS
 static void  init_cols(void)
 {
     // init on mcp23018
     // not needed, already done as part of init_mcp23018()
 
     // Input with pull-up(DDR:0, PORT:1)
     DDRF  &= ~FMASK;
     PORTF |=  FMASK;
 }
 
 static matrix_row_t read_cols(uint8_t row)
 {
     if (row < 6) {
         if (mcp23018_status) { // if there was an error
             return 0;
         } else {
             uint8_t data = 0;
             mcp23018_status = i2c_read_register(I2C_ADDR, GPIOB, &data, 1, ERGODOX_EZ_I2C_TIMEOUT);
             data = (~((uint8_t)data) >> 2) & 0x01 ;
 #ifdef DEBUG_MATRIX
             if (data != 0x00) xprintf("I2C: %d\n", data);
 #endif
             return data;
         }
     } else {
 		// Read using bitmask
         return ~((((PINF & ROW1) >> 5)) & 0x1);
     }
 }
 
 // Row pin configuration
 static void unselect_rows(void)
 {
     // no need to unselect on mcp23018, because the select step sets all
     // the other row bits high, and it's not changing to a different
     // direction
     // Hi-Z(DDR:0, PORT:0) to unselect
     DDRB  &= ~BMASK;
     PORTB &= ~BMASK;
     DDRD  &= ~DMASK;
     PORTD &= ~DMASK;
 }
 
 static void select_row(uint8_t row)
 {
     if (row < 6) {
         // select on mcp23018
         if (mcp23018_status) { // do nothing on error
 			// Read using bitmask
         } else { // set active row low  : 0 // set other rows hi-Z : 1
             uint8_t data = ~(1<<row);
             mcp23018_status = i2c_write_register(I2C_ADDR, GPIOA, &data, 1, ERGODOX_EZ_I2C_TIMEOUT);
         }
     } else {
         // Output low(DDR:1, PORT:0) to select
         switch (row) {
             case 6:
                 DDRB  |= COL6;
                 PORTB &= ~COL6;
                 break;
             case 7:
                 DDRB  |= COL7;
                 PORTB &= ~COL7;
                 break;
             case 8:
                 DDRB  |= COL8;
                 PORTB &= ~COL8;
                 break;
             case 9:
                 DDRB  |= COL9;
                 PORTB &= ~COL9;
                 break;
             case 10:
                 DDRD  |= COL10;
                 PORTD &= ~COL10;
                 break;
             case 11:
                 DDRD  |= COL11;
                 PORTD &= ~COL11;
                 break;
         }
     }
 }