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84 lines
1.7 KiB
C
84 lines
1.7 KiB
C
/*
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Copyright (c) 2011 Arduino. All right reserved.
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This library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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This library 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.
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See the GNU Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with this library; if not, write to the Free Software
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Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include "Arduino.h"
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#ifdef __cplusplus
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extern "C" {
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#endif
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uint32_t millis( void )
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{
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// todo: ensure no interrupts
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return GetTickCount() ;
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}
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uint32_t micros( void )
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{
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uint32_t dwTicks ;
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__disable_irq() ;
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dwTicks=SysTick->VAL ;
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__enable_irq() ;
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return (GetTickCount()*1000) + ((SysTick->LOAD + 1 - dwTicks)/(SystemCoreClock/1000000)) ;
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}
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void delay( uint32_t dwMs )
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{
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Wait( dwMs ) ;
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}
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void delayMicroseconds( uint32_t dwUs )
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{
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uint32_t dwStartMicros=micros() ;
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while ( (micros() - dwStartMicros) < dwUs )
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{
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// do nothing
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}
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}
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/*
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* Cortex-M3 Systick IT handler
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*/
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extern void SysTick_Handler( void )
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{
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// Increment tick count each ms
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TimeTick_Increment() ;
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}
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#if defined ( __ICCARM__ ) /* IAR Ewarm 5.41+ */
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extern signed int putchar( signed int c ) ;
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/**
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* \brief
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*
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* \param c Character to output.
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*
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* \return The character that was output.
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*/
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extern WEAK signed int putchar( signed int c )
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{
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return c ;
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}
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#endif /* __ICCARM__ */
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#ifdef __cplusplus
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}
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#endif
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