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/*
Copyright 2011 Jun Wako < wakojun @ 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/>.
*/
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# ifndef MATRIX_H
# define MATRIX_H
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# include <stdbool.h>
/* number of matrix rows */
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uint8_t matrix_rows ( void ) ;
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/* number of matrix columns */
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uint8_t matrix_cols ( void ) ;
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/* intialize matrix for scaning. should be called once. */
void matrix_init ( void ) ;
/* scan all key states on matrix */
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uint8_t matrix_scan ( void ) ;
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/* whether modified from previous scan. used after matrix_scan. */
bool matrix_is_modified ( void ) ;
/* whether ghosting occur on matrix. */
bool matrix_has_ghost ( void ) ;
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/* whether a swtich is on */
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bool matrix_is_on ( uint8_t row , uint8_t col ) ;
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/* matrix state on row */
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# if (MATRIX_COLS <= 8)
uint8_t matrix_get_row ( uint8_t row ) ;
# else
uint16_t matrix_get_row ( uint8_t row ) ;
# endif
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/* count keys pressed */
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uint8_t matrix_key_count ( void ) ;
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/* print matrix for debug */
void matrix_print ( void ) ;
# endif