Nulo/qmk_firmware
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a bit smaller

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Jeremiah 2017-05-13 16:57:23 -07:00
parent b9895771ed
commit 99877cdff3
1 changed files with 38 additions and 21 deletions
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59
tmk_core/common/keyboard.c
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@ -63,40 +63,54 @@ along with this program. If not, see <http://www.gnu.org/licenses/>.
#ifdef MATRIX_HAS_GHOST
extern const uint16_t keymaps[][MATRIX_ROWS][MATRIX_COLS];
// bit map of true keys and empty spots in matrix, each row is reversed
static uint16_t get_row_ghost_check(uint16_t row){
for (int col = 0; col < MATRIX_COLS; col++) {
if (keymaps[0][row][col])
row &= 1<<col;
else
row &= 0<<col;
}
return row;
}
static bool has_ghost_in_row(uint8_t row)
static uint16_t matrix_ghost_check[MATRIX_ROWS];
static inline bool countones(uint16_t data)
{
matrix_row_t matrix_row = (get_row_ghost_check(matrix_get_row(row)));
int count = 0;
for (int col = 0; col < MATRIX_COLS; col++) {
if (data & (1<<col))
count++;
}
if (count > 1){
return true;
}
return false;
}
static inline bool has_ghost_in_row(uint8_t row, uint16_t rowdata)
{
rowdata &= matrix_ghost_check[row];
if (((rowdata - 1) & rowdata) == 0){
return false;
}
/* No ghost exists when less than 2 keys are down on the row.
If there are "active" blanks in the matrix, the key can't be pressed by the user,
there is no doubt as to which keys are really being pressed.
The ghosts will be ignored, they are KC_NO. */
if (((matrix_row - 1) & matrix_row) == 0){
return false;
}
// Ghost occurs when the row shares column line with other row, blanks in the matrix don't matter
// If there are two or more real keys pressed and they match another row's real keys, the row will be ignored.
// If there are more than two real keys pressed and they match another row's real keys, the row will be ignored.
for (uint8_t i=0; i < MATRIX_ROWS; i++) {
if (i != row && __builtin_popcount(
get_row_ghost_check(matrix_get_row(i)) & matrix_row
) > 1){
if (i != row && countones((matrix_get_row(i) & matrix_ghost_check[i]) & rowdata)){
return true;
}
}
return false;
}
extern const uint16_t keymaps[][MATRIX_ROWS][MATRIX_COLS];
// bit map of true keys and empty spots in matrix, each row is reversed
static inline void make_ghost_check_array(void){
for (int row = 0; row < MATRIX_ROWS; row++) {
for (int col = 0; col < MATRIX_COLS; col++) {
if (pgm_read_byte(&keymaps[0][row][col]) != 0)
matrix_ghost_check[row] |= 1<<col;
}
}
}
#endif
__attribute__ ((weak))
void matrix_setup(void) {
}
@ -134,6 +148,9 @@ void keyboard_init(void) {
#if defined(NKRO_ENABLE) && defined(FORCE_NKRO)
keymap_config.nkro = 1;
#endif
#ifdef MATRIX_HAS_GHOST
make_ghost_check_array();
#endif
}
/*
@ -156,7 +173,7 @@ void keyboard_task(void)
matrix_change = matrix_row ^ matrix_prev[r];
if (matrix_change) {
#ifdef MATRIX_HAS_GHOST
if (has_ghost_in_row(r)) {
if (has_ghost_in_row(r, matrix_row)) {
/* Keep track of whether ghosted status has changed for
* debugging. But don't update matrix_prev until un-ghosted, or
* the last key would be lost.