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@ -28,29 +28,19 @@ along with this program. If not, see <http://www.gnu.org/licenses/>.
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#include "matrix.h"
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#if (MATRIX_COLS > 16)
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# error "MATRIX_COLS must not exceed 16"
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#endif
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#if (MATRIX_ROWS > 255)
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# error "MATRIX_ROWS must not exceed 255"
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#endif
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#ifndef DEBOUNCE
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# define DEBOUNCE 5
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#endif
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static uint8_t debouncing = DEBOUNCE;
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// matrix state buffer(1:on, 0:off)
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static matrix_row_t *matrix;
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static matrix_row_t *matrix_debouncing;
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static matrix_row_t matrix0[MATRIX_ROWS];
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static matrix_row_t matrix1[MATRIX_ROWS];
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/* matrix state(1:on, 0:off) */
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static matrix_row_t matrix[MATRIX_ROWS];
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static matrix_row_t matrix_debouncing[MATRIX_ROWS];
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#ifdef MATRIX_HAS_GHOST
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static bool matrix_has_ghost_in_row(uint8_t row);
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#endif
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static matrix_row_t read_col(void);
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static matrix_row_t read_cols(void);
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static void unselect_rows(void);
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static void select_row(uint8_t row);
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@ -77,36 +67,34 @@ void matrix_init(void)
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// initialize matrix state: all keys off
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for (uint8_t i=0; i < MATRIX_ROWS; i++) {
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matrix0[i] = 0;
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matrix1[i] = 0;
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matrix[i] = 0;
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matrix_debouncing[i] = 0;
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}
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matrix = matrix0;
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matrix_debouncing = matrix1;
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}
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uint8_t matrix_scan(void)
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{
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for (uint8_t i = 0; i < MATRIX_ROWS; i++) {
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unselect_rows();
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select_row(i);
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_delay_us(30); // without this wait read unstable value.
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if (matrix[i] != read_col()) {
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matrix[i] = read_col();
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matrix_row_t cols = read_cols();
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if (matrix_debouncing[i] != cols) {
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matrix_debouncing[i] = cols;
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if (debouncing) {
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debug("bounce!: "); debug_hex(debouncing); print("\n");
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debug("bounce!: "); debug_hex(debouncing); debug("\n");
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}
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debouncing = DEBOUNCE;
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}
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unselect_rows();
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}
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unselect_rows();
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if (debouncing) {
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if (--debouncing) {
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_delay_ms(1);
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} else {
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matrix_row_t *tmp = matrix;
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matrix = matrix_debouncing;
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matrix_debouncing = tmp;
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for (uint8_t i = 0; i < MATRIX_ROWS; i++) {
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matrix[i] = matrix_debouncing[i];
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}
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}
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}
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@ -123,7 +111,7 @@ bool matrix_is_modified(void)
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inline
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bool matrix_is_on(uint8_t row, uint8_t col)
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{
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return (matrix[row] & (1<<col));
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return (matrix[row] & ((matrix_row_t)1<<col));
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}
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inline
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@ -137,11 +125,7 @@ void matrix_print(void)
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print("\nr/c 01234567\n");
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for (uint8_t row = 0; row < matrix_rows(); row++) {
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phex(row); print(": ");
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#if (MATRIX_COLS <= 8)
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pbin_reverse(matrix_get_row(row));
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#else
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pbin_reverse16(matrix_get_row(row));
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#endif
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#ifdef MATRIX_HAS_GHOST
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if (matrix_has_ghost_in_row(row)) {
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print(" <ghost");
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@ -151,19 +135,6 @@ void matrix_print(void)
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}
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}
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uint8_t matrix_key_count(void)
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{
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uint8_t count = 0;
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for (uint8_t i = 0; i < MATRIX_ROWS; i++) {
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#if (MATRIX_COLS <= 8)
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count += bitpop(matrix[i]);
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#else
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count += bitpop16(matrix[i]);
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#endif
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}
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return count;
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}
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#ifdef MATRIX_HAS_GHOST
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inline
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static bool matrix_has_ghost_in_row(uint8_t row)
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@ -174,7 +145,7 @@ static bool matrix_has_ghost_in_row(uint8_t row)
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// ghost exists in case same state as other row
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for (uint8_t i=0; i < MATRIX_ROWS; i++) {
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if (i != row && (matrix[i] & matrix[row]) == matrix[row])
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if (i != row && (matrix[i] & matrix[row]))
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return true;
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}
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return false;
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@ -182,7 +153,7 @@ static bool matrix_has_ghost_in_row(uint8_t row)
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#endif
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inline
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static matrix_row_t read_col(void)
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static matrix_row_t read_cols(void)
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{
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return ~PINB;
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}
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