contiki/platform/avr-ravenusb/rng.h

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#ifndef __AVR_RNG_H__
#define __AVR_RNG_H__
#include <inttypes.h>
//! Returns a byte with eight random bits.
/*! This function is very slow, and should only
** be used when true random entropy is required.
** The time it will take to complete is non-deterministic.
*/
extern uint8_t rng_get_uint8();
#endif