60 lines
2.2 KiB
C
60 lines
2.2 KiB
C
/****************************************************************************
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* net/utils/net_dsec2tick.c
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*
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* SPDX-License-Identifier: Apache-2.0
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*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership. The
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* ASF licenses this file to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance with the
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* License. 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, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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* License for the specific language governing permissions and limitations
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* under the License.
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*
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****************************************************************************/
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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include <nuttx/config.h>
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#include <nuttx/clock.h>
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#include "utils/utils.h"
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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/****************************************************************************
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* Name: net_dsec2tick
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*
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* Description:
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* Convert a decisecond value to a system clock ticks. Used by IGMP logic.
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*
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* Input Parameters:
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* dsec The decisecond value to convert
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*
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* Returned Value:
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* The decisecond value expressed as system clock ticks
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*
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****************************************************************************/
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unsigned int net_dsec2tick(int dsec)
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{
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/* Convert the deci-second comparison value to clock ticks. The CLK_TCK
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* value is the number of clock ticks per second; decisecs argument is the
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* maximum delay in 100's of milliseconds. CLK_TCK/10 is then the number
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* of clock ticks in 100 milliseconds.
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*/
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return CLK_TCK * dsec / 10;
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}
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