59 lines
1.5 KiB
C
59 lines
1.5 KiB
C
/*
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* wait.c
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*
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* Created on: 10.12.2012
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* Author: mfro
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*
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* This file is part of BaS_gcc.
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*
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* BaS_gcc is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* BaS_gcc is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with BaS_gcc. If not, see <http://www.gnu.org/licenses/>.
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*
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* Copyright 2010 - 2012 F. Aschwanden
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* Copyright 2011 - 2012 V. Riviere
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* Copyright 2012 M. Froeschle
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*
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*/
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#include <stdint.h>
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#include <MCF5475.h>
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#include <wait.h>
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/*
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* wait for the specified number of us on slice timer 0. Replaces the original routines that had
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* the number of useconds to wait for hardcoded in their name.
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*/
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inline void wait(uint32_t us)
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{
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uint32_t target = MCF_SLT_SCNT(0) - (us * 132);
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while (MCF_SLT_SCNT(0) > target);
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}
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/*
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* the same as above, with a checker function which gets called while
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* busy waiting and allows for an early return if it returns true
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*/
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inline bool waitfor(uint32_t us, int (*condition)(void))
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{
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uint32_t target = MCF_SLT_SCNT(0) - (us * 132);
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do
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{
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if ((*condition)())
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return TRUE;
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} while (MCF_SLT_SCNT(0) > target);
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return FALSE;
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}
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