--- /dev/null
+/*
+ sim_avr_types.h
+
+ Copyright 2008-2012 Michel Pollet <buserror@gmail.com>
+
+ This file is part of simavr.
+
+ simavr 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.
+
+ simavr 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 simavr. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+
+#ifndef __SIM_AVR_TYPES_H___
+#define __SIM_AVR_TYPES_H___
+
+#include <stdint.h>
+#include <inttypes.h>
+
+typedef uint64_t avr_cycle_count_t;
+typedef uint16_t avr_io_addr_t;
+
+// printf() conversion specifier for avr_cycle_count_t
+#define PRI_avr_cycle_count PRIu64
+
+struct avr_t;
+
+#endif /* __SIM_AVR_TYPES_H___ */
--- /dev/null
+/*
+ sim_time.h
+
+ Copyright 2008-2012 Michel Pollet <buserror@gmail.com>
+
+ This file is part of simavr.
+
+ simavr 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.
+
+ simavr 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 simavr. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+
+#ifndef __SIM_TIME_H___
+#define __SIM_TIME_H___
+
+#include "sim_avr.h"
+
+// converts a number of usec to a number of machine cycles, at current speed
+static inline avr_cycle_count_t avr_usec_to_cycles(struct avr_t * avr, uint32_t usec)
+{
+ return avr->frequency * (avr_cycle_count_t)usec / 1000000;
+}
+
+// converts back a number of cycles to usecs (for usleep)
+static inline uint32_t avr_cycles_to_usec(struct avr_t * avr, avr_cycle_count_t cycles)
+{
+ return 1000000L * cycles / avr->frequency;
+}
+
+// converts back a number of cycles to nsecs
+static inline uint64_t avr_cycles_to_nsec(struct avr_t * avr, avr_cycle_count_t cycles)
+{
+ return (uint64_t)1E6 * (uint64_t)cycles / (avr->frequency/1000);
+}
+
+// converts a number of hz (to megahertz etc) to a number of cycle
+static inline avr_cycle_count_t avr_hz_to_cycles(avr_t * avr, uint32_t hz)
+{
+ return avr->frequency / hz;
+}
+
+#endif /* __SIM_TIME_H___ */