mirror of
https://github.com/arduino/Arduino.git
synced 2024-12-13 23:48:46 +01:00
91 lines
2.5 KiB
C
91 lines
2.5 KiB
C
/*
|
|
wiring_digital.c - digital input and output functions
|
|
Part of Arduino - http://www.arduino.cc/
|
|
|
|
Copyright (c) 2005-2006 David A. Mellis
|
|
|
|
This library is free software; you can redistribute it and/or
|
|
modify it under the terms of the GNU Lesser General Public
|
|
License as published by the Free Software Foundation; either
|
|
version 2.1 of the License, or (at your option) any later version.
|
|
|
|
This library is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
Lesser General Public License for more details.
|
|
|
|
You should have received a copy of the GNU Lesser General
|
|
Public License along with this library; if not, write to the
|
|
Free Software Foundation, Inc., 59 Temple Place, Suite 330,
|
|
Boston, MA 02111-1307 USA
|
|
|
|
Modified 28 September 2010 by Mark Sproul
|
|
|
|
$Id: wiring.c 248 2007-02-03 15:36:30Z mellis $
|
|
*/
|
|
|
|
#include "wiring_private.h"
|
|
|
|
#ifdef __cplusplus
|
|
extern "C" {
|
|
#endif
|
|
|
|
extern void pinMode( uint32_t dwPin, uint32_t dwMode )
|
|
{
|
|
if ( APinDescription[dwPin].dwPinType == PIO_NOT_A_PIN )
|
|
{
|
|
return ;
|
|
}
|
|
|
|
switch ( dwMode )
|
|
{
|
|
case INPUT:
|
|
/* Enable peripheral for clocking input */
|
|
PMC_EnablePeripheral( APinDescription[dwPin].dwPeripheralId ) ;
|
|
PIO_Configure( APinDescription[dwPin].pPort, PIO_INPUT, APinDescription[dwPin].dwPin, 0 ) ;
|
|
break ;
|
|
|
|
case OUTPUT:
|
|
/* if all pins are output, disable PIO Controller clocking, reduce power consomption */
|
|
if ( APinDescription[dwPin].pPort->PIO_OSR == 0xffffffff )
|
|
{
|
|
PMC_DisablePeripheral( APinDescription[dwPin].dwPeripheralId ) ;
|
|
}
|
|
PIO_Configure( APinDescription[dwPin].pPort, PIO_OUTPUT_1, APinDescription[dwPin].dwPin, APinDescription[dwPin].dwPinAttribute ) ;
|
|
break ;
|
|
|
|
default:
|
|
break ;
|
|
}
|
|
}
|
|
|
|
extern void digitalWrite( uint32_t dwPin, uint32_t dwVal )
|
|
{
|
|
if ( APinDescription[dwPin].dwPinType == PIO_NOT_A_PIN )
|
|
{
|
|
return ;
|
|
}
|
|
|
|
PIO_SetOutput( APinDescription[dwPin].pPort, APinDescription[dwPin].dwPin, dwVal, 0, PIO_PULLUP ) ;
|
|
}
|
|
|
|
extern int digitalRead( uint32_t dwPin )
|
|
{
|
|
if ( APinDescription[dwPin].dwPinType == PIO_NOT_A_PIN )
|
|
{
|
|
return LOW ;
|
|
}
|
|
|
|
if ( PIO_Get( APinDescription[dwPin].pPort, PIO_INPUT, APinDescription[dwPin].dwPin ) == 1 )
|
|
{
|
|
return HIGH ;
|
|
}
|
|
|
|
return LOW ;
|
|
}
|
|
|
|
#ifdef __cplusplus
|
|
}
|
|
#endif
|
|
|