50 lines
1.2 KiB
C
50 lines
1.2 KiB
C
/* Copyright 2018 Canaan Inc.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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/**
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* @file sleep.c
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* @brief add from Canaan k210 SDK
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* https://canaan-creative.com/developer
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* @version 1.0
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* @author AIIT XUOS Lab
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* @date 2021-04-25
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*/
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#include "sleep.h"
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#include "sysctl.h"
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int usleep(uint64_t usec)
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{
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uint64_t cycle = read_cycle();
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uint64_t nop_all = usec * SysctlClockGetFreq(SYSCTL_CLOCK_CPU) / 1000000UL;
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while (1)
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{
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if(read_cycle() - cycle >= nop_all)
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break;
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}
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return 0;
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}
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int msleep(uint64_t msec)
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{
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return (unsigned int)usleep(msec * 1000);
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}
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unsigned int sleep(unsigned int seconds)
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{
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return (unsigned int)msleep(seconds * 1000);
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}
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