From 8e88d55bfd7c88cb15845e0c6415e4e892532861 Mon Sep 17 00:00:00 2001 From: Jack Humbert Date: Mon, 4 Jul 2016 11:45:58 -0400 Subject: reverts #343 for the most part (#474) --- tmk_core/common/keyboard.c | 107 ++++++++++++++++++++++++++------------------- 1 file changed, 62 insertions(+), 45 deletions(-) (limited to 'tmk_core/common/keyboard.c') diff --git a/tmk_core/common/keyboard.c b/tmk_core/common/keyboard.c index 34e1ceeca..81df8eb73 100644 --- a/tmk_core/common/keyboard.c +++ b/tmk_core/common/keyboard.c @@ -51,17 +51,20 @@ along with this program. If not, see . #endif #ifdef MATRIX_HAS_GHOST -static bool is_row_ghosting(uint8_t row){ - matrix_row_t state = matrix_get_row(row); - /* no ghosting happens when only one key in the row is pressed */ - if (!(state - 1 & state)) return false; - /* ghosting occurs when two keys in the same column are pressed */ - for (int8_t r = MATRIX_ROWS - 1; r >= 0; --r) { - if (r != row && matrix_get_row(r) & state) return true; +static bool has_ghost_in_row(uint8_t row) +{ + matrix_row_t matrix_row = matrix_get_row(row); + // No ghost exists when less than 2 keys are down on the row + if (((matrix_row - 1) & matrix_row) == 0) + return false; + + // Ghost occurs when the row shares column line with other row + for (uint8_t i=0; i < MATRIX_ROWS; i++) { + if (i != row && (matrix_get_row(i) & matrix_row)) + return true; } return false; } - #endif __attribute__ ((weak)) @@ -100,72 +103,86 @@ void keyboard_init(void) { #endif } -/* does routine keyboard jobs */ -void keyboard_task(void) { - static uint8_t led_status; +/* + * Do keyboard routine jobs: scan mantrix, light LEDs, ... + * This is repeatedly called as fast as possible. + */ +void keyboard_task(void) +{ + static matrix_row_t matrix_prev[MATRIX_ROWS]; +#ifdef MATRIX_HAS_GHOST + static matrix_row_t matrix_ghost[MATRIX_ROWS]; +#endif + static uint8_t led_status = 0; + matrix_row_t matrix_row = 0; + matrix_row_t matrix_change = 0; + matrix_scan(); - for (int8_t r = MATRIX_ROWS - 1; r >= 0; --r) { - static matrix_row_t previous_matrix[MATRIX_ROWS]; - matrix_row_t state = matrix_get_row(r); - matrix_row_t changes = state ^ previous_matrix[r]; - if (changes) { + for (uint8_t r = 0; r < MATRIX_ROWS; r++) { + matrix_row = matrix_get_row(r); + matrix_change = matrix_row ^ matrix_prev[r]; + if (matrix_change) { #ifdef MATRIX_HAS_GHOST - static matrix_row_t deghosting_matrix[MATRIX_ROWS]; - if (is_row_ghosting(r)) { - /* debugs the deghosting mechanism */ - /* doesn't update previous_matrix until the ghosting has stopped - * in order to prevent the last key from being lost + if (has_ghost_in_row(r)) { + /* 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. */ - if (debug_matrix && deghosting_matrix[r] != state) { + if (debug_matrix && matrix_ghost[r] != matrix_row) { matrix_print(); } - deghosting_matrix[r] = state; + matrix_ghost[r] = matrix_row; continue; } - deghosting_matrix[r] = state; + matrix_ghost[r] = matrix_row; #endif if (debug_matrix) matrix_print(); - for (int8_t c = MATRIX_COLS - 1; c >= 0; --c) { - matrix_row_t mask = (matrix_row_t)1 << c; - if (changes & mask) { - keyevent_t event; - event.key = (keypos_t){ .row = r, .col = c }; - event.pressed = state & mask; - /* the time should not be 0 */ - event.time = timer_read() | 1; - action_exec(event); - /* records the processed key event */ - previous_matrix[r] ^= mask; - /* processes one key event per call */ - goto event_processed; + for (uint8_t c = 0; c < MATRIX_COLS; c++) { + if (matrix_change & ((matrix_row_t)1<