Issue #18: Implement CRC calculation module

stm-firmware/include/stm-periph/crc-unit.h

@@ -0,0 +1,38 @@
+/* Reflow Oven Controller
+ *
+ * Copyright (C) 2020  Mario Hüttel <mario.huettel@gmx.net>
+ *
+ * This file is part of the Reflow Oven Controller Project.
+ *
+ * The reflow oven controller is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * GDSII-Converter 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 the reflow oven controller project.
+ * If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef __CRC_UNIT_H__
+#define __CRC_UNIT_H__
+
+#include <stdint.h>
+
+void crc_unit_init(void);
+
+void crc_unit_deinit(void);
+
+void crc_unit_reset(void);
+
+uint32_t crc_unit_get_crc(void);
+
+void crc_unit_input(uint32_t data);
+
+void crc_unit_input_array(const uint32_t *data, uint32_t len);
+
+#endif /* __CRC_UNIT_H__ */