/* ----------------------------------------------------------------------------
* SAM Software Package License
* ----------------------------------------------------------------------------
* Copyright (c) 2011-2012, Atmel Corporation
*
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following condition is met:
*
* - Redistributions of source code must retain the above copyright notice,
* this list of conditions and the disclaimer below.
*
* Atmel's name may not be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* DISCLAIMER: THIS SOFTWARE IS PROVIDED BY ATMEL "AS IS" AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT ARE
* DISCLAIMED. IN NO EVENT SHALL ATMEL BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA,
* OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
* EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
* ----------------------------------------------------------------------------
*/
/** \file */
/*----------------------------------------------------------------------------
* Headers
*----------------------------------------------------------------------------*/
#include "chip.h"
/**
* \brief Configures Pio pin internal pull-up.
*
* \param pPio Pointer to a PIO controller.
* \param dwMask Bitmask of one or more pin(s) to configure.
* \param dwPullUpEnable Indicates if the pin(s) internal pull-up shall be configured.
*/
extern void PIO_DisableInterrupt( Pio *pPio, const uint32_t dwMask )
{
/* Disable interrupts on the pin */
pPio->PIO_IDR = dwMask ;
}
/**
* \brief Configures Pio pin internal pull-up.
*
* \param pPio Pointer to a PIO controller.
* \param dwMask Bitmask of one or more pin(s) to configure.
* \param dwPullUpEnable Indicates if the pin(s) internal pull-up shall be configured.
*/
extern void PIO_PullUp( Pio *pPio, const uint32_t dwMask, const uint32_t dwPullUpEnable )
{
/* Enable the pull-up(s) if necessary */
if ( dwPullUpEnable )
{
pPio->PIO_PUER = dwMask ;
}
else
{
pPio->PIO_PUDR = dwMask ;
}
}
/**
* \brief Configures Glitch or Debouncing filter for input.
*
* \param pin Pointer to a Pin instance describing one or more pins.
* \param cuttoff Cutt off frequency for debounce filter.
*/
extern void PIO_SetDebounceFilter( Pio* pPio, const uint32_t dwMask, const uint32_t dwCuttOff )
{
#if (defined _SAM3S_) || (defined _SAM3S8_) || (defined _SAM3N_)
pPio->PIO_IFSCER = dwMask ; /* set Debouncing, 0 bit field no effect */
#elif (defined _SAM3XA_) || (defined _SAM3U_)
pPio->PIO_DIFSR = dwMask ; /* set Debouncing, 0 bit field no effect */
#else
#error "The specified chip is not supported."
#endif
pPio->PIO_SCDR = ((32678/(2*(dwCuttOff))) - 1) & 0x3FFF; /* the lowest 14 bits work */
}
/**
* \brief Sets a high output level on all the PIOs defined in the given Pin instance.
* This has no immediate effects on PIOs that are not output, but the PIO
* controller will memorize the value they are changed to outputs.
*
* \param pin Pointer to a Pin instance describing one or more pins.
*/
extern void PIO_Set( Pio* pPio, const uint32_t dwMask )
{
pPio->PIO_SODR = dwMask ;
}
/**
* \brief Returns 1 if one or more PIO of the given Pin instance currently have
* a high level; otherwise returns 0. This method returns the actual value that
* is being read on the pin. To return the supposed output value of a pin, use
* PIO_GetOutputDataStatus() instead.
*
* \param pin Pointer to a Pin instance describing one or more pins.
*
* \return 1 if the Pin instance contains at least one PIO that currently has
* a high level; otherwise 0.
*/
extern uint32_t PIO_Get( Pio* pPio, const EPioType dwType, const uint32_t dwMask )
{
uint32_t dwReg ;
if ( (dwType == PIO_OUTPUT_0) || (dwType == PIO_OUTPUT_1) )
{
dwReg = pPio->PIO_ODSR ;
}
else
{
dwReg = pPio->PIO_PDSR ;
}
if ( (dwReg & dwMask) == 0 )
{
return 0 ;
}
else
{
return 1 ;
}
}
/**
* \brief Sets a low output level on all the PIOs defined in the given Pin instance.
* This has no immediate effects on PIOs that are not output, but the PIO
* controller will memorize the value they are changed to outputs.
*
* \param pin Pointer to a Pin instance describing one or more pins.
*/
extern void PIO_Clear( Pio* pPio, const uint32_t dwMask )
{
pPio->PIO_CODR = dwMask ;
}
/**
* \brief Configures one pin of a PIO controller as being controlled by specific peripheral.
*
* \param pPio Pointer to a PIO controller.
* \param dwType PIO type.
* \param dwMask Bitmask of one or more pin(s) to configure.
*/
extern void PIO_SetPeripheral( Pio* pPio, EPioType dwType, uint32_t dwMask )
{
uint32_t dwSR ;
/* Disable interrupts on the pin(s) */
pPio->PIO_IDR = dwMask ;
switch ( dwType )
{
case PIO_PERIPH_A :
#if (defined _SAM3S_) || (defined _SAM3S8_) || (defined _SAM3N_)
dwSR = pPio->PIO_ABCDSR[0] ;
pPio->PIO_ABCDSR[0] &= (~dwMask & dwSR) ;
dwSR = pPio->PIO_ABCDSR[1];
pPio->PIO_ABCDSR[1] &= (~dwMask & dwSR) ;
#endif /* (defined _SAM3S_) || (defined _SAM3S8_) || (defined _SAM3N_) */
#if (defined _SAM3U_) || (defined _SAM3XA_)
dwSR = pPio->PIO_ABSR ;
pPio->PIO_ABSR &= (~dwMask & dwSR) ;
#endif /* (defined _SAM3U_) || (defined _SAM3XA_) */
break ;
case PIO_PERIPH_B :
#if (defined _SAM3S_) || (defined _SAM3S8_) || (defined _SAM3N_)
dwSR = pPio->PIO_ABCDSR[0] ;
pPio->PIO_ABCDSR[0] = (dwMask | dwSR) ;
dwSR = pPio->PIO_ABCDSR[1] ;
pPio->PIO_ABCDSR[1] &= (~dwMask & dwSR) ;
#endif /* (defined _SAM3S_) || (defined _SAM3S8_) || (defined _SAM3N_) */
#if (defined _SAM3U_) || (defined _SAM3XA_)
dwSR = pPio->PIO_ABSR ;
pPio->PIO_ABSR = (dwMask | dwSR) ;
#endif /* (defined _SAM3U_) || (defined _SAM3XA_) */
break ;
#if (defined _SAM3S_) || (defined _SAM3S8_) || (defined _SAM3N_)
case PIO_PERIPH_C :
dwSR = pPio->PIO_ABCDSR[0] ;
pPio->PIO_ABCDSR[0] &= (~dwMask & dwSR) ;
dwSR = pPio->PIO_ABCDSR[1] ;
pPio->PIO_ABCDSR[1] = (dwMask | dwSR) ;
break ;
case PIO_PERIPH_D :
dwSR = pPio->PIO_ABCDSR[0] ;
pPio->PIO_ABCDSR[0] = (dwMask | dwSR) ;
dwSR = pPio->PIO_ABCDSR[1] ;
pPio->PIO_ABCDSR[1] = (dwMask | dwSR) ;
break ;
#endif /* (defined _SAM3S_) || (defined _SAM3S8_) || (defined _SAM3N_) */
// other types are invalid in this function
case PIO_INPUT :
case PIO_OUTPUT_0 :
case PIO_OUTPUT_1 :
case PIO_NOT_A_PIN :
return ;
}
// Remove the pins from under the control of PIO
pPio->PIO_PDR = dwMask ;
}
/**
* \brief Configures one or more pin(s) or a PIO controller as inputs. Optionally,
* the corresponding internal pull-up(s) and glitch filter(s) can be enabled.
*
* \param pPio Pointer to a PIO controller.
* \param dwMask Bitmask indicating which pin(s) to configure as input(s).
* \param dwAttribute .
*/
extern void PIO_SetInput( Pio* pPio, uint32_t dwMask, uint32_t dwAttribute )
{
PIO_DisableInterrupt( pPio, dwMask ) ;
PIO_PullUp( pPio, dwMask, dwAttribute & PIO_PULLUP ) ;
/* Enable Input Filter if necessary */
if ( dwAttribute & (PIO_DEGLITCH | PIO_DEBOUNCE) )
{
pPio->PIO_IFER = dwMask ;
}
else
{
pPio->PIO_IFDR = dwMask ;
}
/* Enable de-glitch or de-bounce if necessary */
#if (defined _SAM3S_) || (defined _SAM3S8_) || (defined _SAM3N_)
if ( dwAttribute & PIO_DEGLITCH )
{
pPio->PIO_IFSCDR = dwMask ;
}
else
{
if ( dwAttribute & PIO_DEBOUNCE )
{
pPio->PIO_IFSCER = dwMask ;
}
}
#elif (defined _SAM3U_) || (defined _SAM3XA_)
if ( dwAttribute & PIO_DEGLITCH )
{
pPio->PIO_SCIFSR = dwMask ;
}
else
{
if ( dwAttribute & PIO_DEBOUNCE )
{
pPio->PIO_SCIFSR = dwMask ;
}
}
#else
#error "The specified chip is not supported."
#endif
/* Configure pin as input */
pPio->PIO_ODR = dwMask ;
pPio->PIO_PER = dwMask ;
}
/**
* \brief Configures one or more pin(s) of a PIO controller as outputs, with the
* given default value. Optionally, the multi-drive feature can be enabled
* on the pin(s).
*
* \param pPio Pointer to a PIO controller.
* \param dwMask Bitmask indicating which pin(s) to configure.
* \param defaultValue Default level on the pin(s).
* \param enableMultiDrive Indicates if the pin(s) shall be configured as open-drain.
* \param enablePullUp Indicates if the pin shall have its pull-up activated.
*/
extern void PIO_SetOutput( Pio* pPio, uint32_t dwMask, uint32_t dwDefaultValue,
uint32_t dwMultiDriveEnable, uint32_t dwPullUpEnable )
{
PIO_DisableInterrupt( pPio, dwMask ) ;
PIO_PullUp( pPio, dwMask, dwPullUpEnable ) ;
/* Enable multi-drive if necessary */
if ( dwMultiDriveEnable )
{
pPio->PIO_MDER = dwMask ;
}
else
{
pPio->PIO_MDDR = dwMask ;
}
/* Set default value */
if ( dwDefaultValue )
{
pPio->PIO_SODR = dwMask ;
}
else
{
pPio->PIO_CODR = dwMask ;
}
/* Configure pin(s) as output(s) */
pPio->PIO_OER = dwMask ;
pPio->PIO_PER = dwMask ;
}
/**
*
* \return 1 if the pins have been configured properly; otherwise 0.
*/
extern uint32_t PIO_Configure( Pio* pPio, const EPioType dwType, const uint32_t dwMask, const uint32_t dwAttribute )
{
/* Configure pins */
switch ( dwType )
{
case PIO_PERIPH_A :
case PIO_PERIPH_B :
#if (defined _SAM3S_) || (defined _SAM3S8_) || (defined _SAM3N_)
case PIO_PERIPH_C :
case PIO_PERIPH_D :
#endif /* (defined _SAM3S_) || (defined _SAM3S8_) || (defined _SAM3N_) */
/* Put the pin under control of peripheral */
PIO_SetPeripheral( pPio, dwType, dwMask ) ;
/* Disable interrupts on the pin(s) */
PIO_DisableInterrupt( pPio, dwMask ) ;
/* Enable Pullup */
PIO_PullUp( pPio, dwMask, (dwAttribute & PIO_PULLUP) ) ;
break;
case PIO_INPUT :
PIO_SetInput( pPio, dwMask, dwAttribute ) ;
break;
case PIO_OUTPUT_0 :
case PIO_OUTPUT_1 :
PIO_SetOutput( pPio, dwMask, (dwType == PIO_OUTPUT_1),
(dwAttribute & PIO_OPENDRAIN) ? 1 : 0,
(dwAttribute & PIO_PULLUP) ? 1 : 0);
break ;
default :
return 0 ;
}
return 1 ;
}
/**
* \brief Returns 1 if one or more PIO of the given Pin are configured to output a
* high level (even if they are not output).
* To get the actual value of the pin, use PIO_Get() instead.
*
* \param pPio Pointer to a Pin instance describing one or more pins.
*
* \return 1 if the Pin instance contains at least one PIO that is configured
* to output a high level; otherwise 0.
*/
extern uint32_t PIO_GetOutputDataStatus( const Pio* pPio, const uint32_t dwMask )
{
/* Test if pin is under control of PIO */
if ( (pPio->PIO_PSR & dwMask) != 0 )
{
/* Test if pin is configured as output */
if ( (pPio->PIO_OSR & dwMask) != 0 )
{
return 1 ;
}
}
return 0 ;
}