Adding first release of Pico CCID. It should be the core for different types of smart cards.

src/rng/neug.h

@@ -0,0 +1,29 @@
+/* 
+ * This file is part of the Pico CCID distribution (https://github.com/polhenarejos/pico-ccid).
+ * Copyright (c) 2022 Pol Henarejos.
+ * 
+ * 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, 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 
+ * 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/>.
+ */
+
+#ifndef _NEUG_H_
+#define _NEUG_H_
+
+#define NEUG_PRE_LOOP 32
+
+void neug_init(uint32_t *buf, uint8_t size);
+uint32_t neug_get();
+void neug_flush(void);
+void neug_wait_full(void);
+void neug_fini(void);
+
+#endif