#ifndef MATRIX_H
#define MATRIX_H
+#include <stdint.h>
#include <stdbool.h>
+
+#if (MATRIX_COLS <= 8)
+typedef uint8_t matrix_row_t;
+#elif (MATRIX_COLS <= 16)
+typedef uint16_t matrix_row_t;
+#elif (MATRIX_COLS <= 32)
+typedef uint32_t matrix_row_t;
+#else
+#error "MATRIX_COLS: invalid value"
+#endif
+
+#define MATRIX_IS_ON(row, col) (matrix_get_row(row) && (1<<col))
+
+
/* number of matrix rows */
uint8_t matrix_rows(void);
/* number of matrix columns */
uint8_t matrix_scan(void);
/* whether modified from previous scan. used after matrix_scan. */
bool matrix_is_modified(void);
-/* whether ghosting occur on matrix. */
-bool matrix_has_ghost(void);
/* whether a swtich is on */
bool matrix_is_on(uint8_t row, uint8_t col);
/* matrix state on row */
-#if (MATRIX_COLS <= 8)
-uint8_t matrix_get_row(uint8_t row);
-#else
-uint16_t matrix_get_row(uint8_t row);
-#endif
-/* count keys pressed */
-uint8_t matrix_key_count(void);
+matrix_row_t matrix_get_row(uint8_t row);
/* print matrix for debug */
void matrix_print(void);