USBrelay: add device autodetection

Tetris/displaybuf.h

@@ -0,0 +1,48 @@
+/*
+ * This file is part of the tetris project.
+ * Copyright 2020 Edward V. Emelianov <edward.emelianoff@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 3 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/>.
+ */
+#pragma once
+#ifndef DISPLAYBUF_H__
+#define DISPLAYBUF_H__
+
+#include <stdint.h>
+
+#define ROWS    30
+#define COLS    15
+#define xmax (COLS-1)
+#define ymax (ROWS-1)
+
+// get coordinates by figure member
+#define GETX(u) (((u) >> 4) - 2)
+#define GETY(u) (((u) & 0xf) - 2)
+
+typedef struct{
+    uint8_t f[4];
+    uint8_t color;
+} figure;
+
+#define FIGURESNUM  (4)
+extern const figure L, J, O, I;
+extern uint8_t cup[ROWS][COLS];
+
+int chkfigure(int x, int y, const figure *F);
+void clearfigure(int x, int y, const figure *F);
+void putfigure(int x, int y, const figure *F);
+void rotatefigure(int dir, figure *F);
+int checkandroll();
+
+#endif // DISPLAYBUF_H__