A refactor.

Signed-off-by: Pol Henarejos <pol.henarejos@cttc.es>

src/serial.h

@@ -0,0 +1,36 @@
+/*
+ * This file is part of the Pico Keys SDK distribution (https://github.com/polhenarejos/pico-keys-sdk).
+ * Copyright (c) 2022 Pol Henarejos.
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, version 3.
+ *
+ * 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
+ * Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program. If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#ifndef _SERIAL_H_
+#define _SERIAL_H_
+
+#include <stdint.h>
+
+#if !defined (PICO_PLATFORM)
+#define PICO_UNIQUE_BOARD_ID_SIZE_BYTES 8
+typedef struct { uint8_t id[PICO_UNIQUE_BOARD_ID_SIZE_BYTES]; } picokey_serial_t;
+#else
+#include "pico/unique_id.h"
+typedef pico_unique_board_id_t picokey_serial_t;
+#endif
+
+extern picokey_serial_t pico_serial;
+extern char pico_serial_str[2 * PICO_UNIQUE_BOARD_ID_SIZE_BYTES + 1];
+extern uint8_t pico_serial_hash[32];
+extern void serial_init(void);
+
+#endif //_SERIAL_H_