/*
* scan matrix
*/
+#include <stdint.h>
+#include <stdbool.h>
#include <avr/io.h>
#include <util/delay.h>
-#include "keymap.h"
-#include "matrix.h"
-
-// matrix is active low. (key on: 0/key off: 1)
-// row: Hi-Z(unselected)/low output(selected)
-// PD0, PC7, PD7, PF6, PD6, PD1, PD2, PC6, PF7
-// col: input w/pullup
-// PB0-PB7
-
-// matrix state buffer
-uint8_t *matrix;
-uint8_t *matrix_prev;
+#include "print.h"
+#include "util.h"
+#include "matrix_skel.h"
+
+
+#if (MATRIX_COLS > 16)
+# error "MATRIX_COLS must not exceed 16"
+#endif
+#if (MATRIX_ROWS > 255)
+# error "MATRIX_ROWS must not exceed 255"
+#endif
+
+
+// matrix state buffer(1:on, 0:off)
+#if (MATRIX_COLS <= 8)
+static uint8_t *matrix;
+static uint8_t *matrix_prev;
static uint8_t _matrix0[MATRIX_ROWS];
static uint8_t _matrix1[MATRIX_ROWS];
-
+#else
+static uint16_t *matrix;
+static uint16_t *matrix_prev;
+static uint16_t _matrix0[MATRIX_ROWS];
+static uint16_t _matrix1[MATRIX_ROWS];
+#endif
+
+#ifdef MATRIX_HAS_GHOST
+static bool matrix_has_ghost_in_row(uint8_t row);
+#endif
static uint8_t read_col(void);
static void unselect_rows(void);
static void select_row(uint8_t row);
-// this must be called once before matrix_scan.
+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
unselect_rows();
+ // Input with pull-up(DDR:0, PORT:1)
DDRB = 0x00;
PORTB = 0xFF;
// initialize matrix state: all keys off
- for (int i=0; i < MATRIX_ROWS; i++) _matrix0[i] = 0xFF;
- for (int i=0; i < MATRIX_ROWS; i++) _matrix1[i] = 0xFF;
+ for (uint8_t i=0; i < MATRIX_ROWS; i++) _matrix0[i] = 0x00;
+ for (uint8_t i=0; i < MATRIX_ROWS; i++) _matrix1[i] = 0x00;
matrix = _matrix0;
matrix_prev = _matrix1;
}
uint8_t matrix_scan(void)
{
- uint8_t row, state;
uint8_t *tmp;
tmp = matrix_prev;
matrix_prev = matrix;
matrix = tmp;
- for (row = 0; row < MATRIX_ROWS; row++) {
- select_row(row);
- _delay_us(30); // without this wait read unstable value.
- state = read_col();
+ for (uint8_t i = 0; i < MATRIX_ROWS; i++) {
unselect_rows();
-
- matrix[row] = state;
+ select_row(i);
+ _delay_us(30); // without this wait read unstable value.
+ matrix[i] = ~read_col();
}
+ unselect_rows();
return 1;
}
-bool matrix_is_modified(void) {
- for (int i=0; i <MATRIX_ROWS; i++) {
+bool matrix_is_modified(void)
+{
+ for (uint8_t i = 0; i < MATRIX_ROWS; i++) {
if (matrix[i] != matrix_prev[i])
return true;
}
return false;
}
-bool matrix_has_ghost(void) {
- for (int i=0; i <MATRIX_ROWS; i++) {
+inline
+bool matrix_has_ghost(void)
+{
+#ifdef MATRIX_HAS_GHOST
+ for (uint8_t i = 0; i < MATRIX_ROWS; i++) {
if (matrix_has_ghost_in_row(i))
return true;
}
+#endif
return false;
}
-bool matrix_has_ghost_in_row(uint8_t row) {
- uint8_t state = ~matrix[row];
+inline
+bool matrix_is_on(uint8_t row, uint8_t col)
+{
+ return (matrix[row] & (1<<col));
+}
+
+inline
+#if (MATRIX_COLS <= 8)
+uint8_t matrix_get_row(uint8_t row)
+#else
+uint16_t matrix_get_row(uint8_t row)
+#endif
+{
+ return matrix[row];
+}
+
+void matrix_print(void)
+{
+ print("\nr/c 01234567\n");
+ for (uint8_t row = 0; row < matrix_rows(); row++) {
+ phex(row); print(": ");
+#if (MATRIX_COLS <= 8)
+ pbin_reverse(matrix_get_row(row));
+#else
+ pbin_reverse16(matrix_get_row(row));
+#endif
+#ifdef MATRIX_HAS_GHOST
+ if (matrix_has_ghost_in_row(row)) {
+ print(" <ghost");
+ }
+#endif
+ print("\n");
+ }
+}
+
+uint8_t matrix_key_count(void)
+{
+ uint8_t count = 0;
+ for (uint8_t i = 0; i < MATRIX_ROWS; i++) {
+#if (MATRIX_COLS <= 8)
+ count += bitpop(matrix[i]);
+#else
+ count += bitpop16(matrix[i]);
+#endif
+ }
+ return count;
+}
+
+#ifdef MATRIX_HAS_GHOST
+inline
+static bool matrix_has_ghost_in_row(uint8_t row)
+{
// no ghost exists in case less than 2 keys on
- if (((state - 1) & state) == 0)
+ if (((matrix[row] - 1) & matrix[row]) == 0)
return false;
// ghost exists in case same state as other row
- for (int i=0; i < MATRIX_ROWS; i++) {
- if (i == row) continue;
- if ((~matrix[i] & state) == state) return true;
+ for (uint8_t i=0; i < MATRIX_ROWS; i++) {
+ if (i != row && (matrix[i] & matrix[row]) == matrix[row])
+ return true;
}
return false;
}
+#endif
+inline
static uint8_t read_col(void)
{
return PINB;
}
-static void unselect_rows(void) {
- DDRD = 0x00;
- PORTD = 0x00;
- DDRC = 0x00;
- PORTC = 0x00;
- DDRF = 0x00;
- PORTF = 0x00;
+inline
+static void unselect_rows(void)
+{
+ // Hi-Z(DDR:0, PORT:0) to unselect
+ DDRC &= ~0b11000000; // PC: 7,6
+ PORTC &= ~0b11000000;
+ DDRD &= ~0b11000111; // PD: 7,6,2,1,0
+ PORTD &= ~0b11000111;
+ DDRF &= ~0b11000000; // PF: 7,6
+ PORTF &= ~0b11000000;
}
+inline
static void select_row(uint8_t row)
{
+ // Output low(DDR:1, PORT:0) to select
+ // row: 0 1 2 3 4 5 6 7 8
+ // pin: PD0, PC7, PD7, PF6, PD6, PD1, PD2, PC6, PF7
switch (row) {
case 0:
- DDRD = (1<<0);
- PORTD = 0x00;
- DDRC = 0x00;
- PORTC = 0x00;
- DDRF = 0x00;
- PORTF = 0x00;
+ DDRD |= (1<<0);
+ PORTD &= ~(1<<0);
break;
case 1:
- DDRD = 0x00;
- PORTD = 0x00;
- DDRC = (1<<7);
- PORTC = 0x00;
- DDRF = 0x00;
- PORTF = 0x00;
+ DDRC |= (1<<7);
+ PORTC &= ~(1<<7);
break;
case 2:
- DDRD = (1<<7);
- PORTD = 0x00;
- DDRC = 0x00;
- PORTC = 0x00;
- DDRF = 0x00;
- PORTF = 0x00;
+ DDRD |= (1<<7);
+ PORTD &= ~(1<<7);
break;
case 3:
- DDRD = 0x00;
- PORTD = 0x00;
- DDRC = 0x00;
- PORTC = 0x00;
- DDRF = (1<<6);
- PORTF = 0x00;
+ DDRF |= (1<<6);
+ PORTF &= ~(1<<6);
break;
case 4:
- DDRD = (1<<6);
- PORTD = 0x00;
- DDRC = 0x00;
- PORTC = 0x00;
- DDRF = 0x00;
- PORTF = 0x00;
+ DDRD |= (1<<6);
+ PORTD &= ~(1<<6);
break;
case 5:
- DDRD = (1<<1);
- PORTD = 0x00;
- DDRC = 0x00;
- PORTC = 0x00;
- DDRF = 0x00;
- PORTF = 0x00;
+ DDRD |= (1<<1);
+ PORTD &= ~(1<<1);
break;
case 6:
- DDRD = (1<<2);
- PORTD = 0x00;
- DDRC = 0x00;
- PORTC = 0x00;
- DDRF = 0x00;
- PORTF = 0x00;
+ DDRD |= (1<<2);
+ PORTD &= ~(1<<2);
break;
case 7:
- DDRD = 0x00;
- PORTD = 0x00;
- DDRC = (1<<6);
- PORTC = 0x00;
- DDRF = 0x00;
- PORTF = 0x00;
+ DDRC |= (1<<6);
+ PORTC &= ~(1<<6);
break;
case 8:
- DDRD = 0x00;
- PORTD = 0x00;
- DDRC = 0x00;
- PORTC = 0x00;
- DDRF = (1<<7);
- PORTF = 0x00;
+ DDRF |= (1<<7);
+ PORTF &= ~(1<<7);
break;
}
}