77 lines
1.6 KiB
C
77 lines
1.6 KiB
C
/* clock.c - System specific clock routines */
|
|
|
|
/*
|
|
* Copyright (c) 2015 Intel Corporation
|
|
*
|
|
* Licensed under the Apache License, Version 2.0 (the "License");
|
|
* you may not use this file except in compliance with the License.
|
|
* You may obtain a copy of the License at
|
|
*
|
|
* http://www.apache.org/licenses/LICENSE-2.0
|
|
*
|
|
* Unless required by applicable law or agreed to in writing, software
|
|
* distributed under the License is distributed on an "AS IS" BASIS,
|
|
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
* See the License for the specific language governing permissions and
|
|
* limitations under the License.
|
|
*/
|
|
|
|
#include "sys/clock.h"
|
|
#include <stdlib.h>
|
|
|
|
#define DEBUG 0
|
|
#include "contiki/ip/uip-debug.h"
|
|
|
|
#if UIP_LOGGING
|
|
#include <stdio.h>
|
|
void uip_log(char *msg);
|
|
#define UIP_LOG(m) uip_log(m)
|
|
#else
|
|
#define UIP_LOG(m)
|
|
#endif
|
|
|
|
static int64_t start_time;
|
|
|
|
void clock_init(void)
|
|
{
|
|
sys_tick_delta(&start_time);
|
|
}
|
|
|
|
clock_time_t clock_time(void)
|
|
{
|
|
return sys_tick_get_32();
|
|
}
|
|
|
|
unsigned long clock_seconds(void)
|
|
{
|
|
return clock_time() / sys_clock_ticks_per_sec;
|
|
}
|
|
|
|
void clock_delay(unsigned int d)
|
|
{
|
|
switch (sys_execution_context_type_get()) {
|
|
case NANO_CTX_FIBER:
|
|
fiber_sleep(d);
|
|
break;
|
|
#ifdef CONFIG_MICROKERNEL
|
|
case NANO_CTX_TASK:
|
|
task_sleep(d);
|
|
break;
|
|
#endif
|
|
default:
|
|
return;
|
|
}
|
|
}
|
|
|
|
/* Note that this function busy waits until the delay has passed. */
|
|
void clock_delay_usec_busywait(uint32_t dt)
|
|
{
|
|
#define USEC_TO_CYCLES(usec) ((usec) * sys_clock_hw_cycles_per_sec / USEC_PER_SEC)
|
|
|
|
uint32_t usec = USEC_TO_CYCLES(dt);
|
|
uint32_t start = sys_cycle_get_32();
|
|
|
|
while ((start + usec) > sys_cycle_get_32()) {
|
|
}
|
|
}
|