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-rw-r--r--tmk_core/common/matrix.h10
1 files changed, 10 insertions, 0 deletions
diff --git a/tmk_core/common/matrix.h b/tmk_core/common/matrix.h
index 2543f5abce..e5665bf40a 100644
--- a/tmk_core/common/matrix.h
+++ b/tmk_core/common/matrix.h
@@ -31,6 +31,16 @@ typedef uint32_t matrix_row_t;
#error "MATRIX_COLS: invalid value"
#endif
+#if (MATRIX_ROWS <= 8)
+typedef uint8_t matrix_col_t;
+#elif (MATRIX_ROWS <= 16)
+typedef uint16_t matrix_col_t;
+#elif (MATRIX_ROWS <= 32)
+typedef uint32_t matrix_col_t;
+#else
+#error "MATRIX_ROWS: invalid value"
+#endif
+
#define MATRIX_IS_ON(row, col) (matrix_get_row(row) && (1<<col))