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simtrace2/minimal/pio.c
Christina Quast 2d18f171c2 minimal testprog (not working)
2014-11-22 19:48:48 +01:00

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/* ----------------------------------------------------------------------------
* ATMEL Microcontroller Software Support
* ----------------------------------------------------------------------------
* Copyright (c) 2010, Atmel Corporation
*
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are 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 "include/chip.h"
#include "include/pio.h"
#include "include/pmc.h"
/*----------------------------------------------------------------------------
* Local functions
*----------------------------------------------------------------------------*/
/**
* \brief Configures one or more pin(s) of a PIO controller as being controlled by
* peripheral A. Optionally, the corresponding internal pull-up(s) can be enabled.
*
* \param pio Pointer to a PIO controller.
* \param mask Bitmask of one or more pin(s) to configure.
* \param enablePullUp Indicates if the pin(s) internal pull-up shall be
* configured.
*/
static void PIO_SetPeripheralA(
Pio *pio,
unsigned int mask,
unsigned char enablePullUp)
{
unsigned int abcdsr;
/* Disable interrupts on the pin(s) */
pio->PIO_IDR = mask;
/* Enable the pull-up(s) if necessary */
if (enablePullUp) {
pio->PIO_PUER = mask;
}
else {
pio->PIO_PUDR = mask;
}
abcdsr = pio->PIO_ABCDSR[0];
pio->PIO_ABCDSR[0] &= (~mask & abcdsr);
abcdsr = pio->PIO_ABCDSR[1];
pio->PIO_ABCDSR[1] &= (~mask & abcdsr);
pio->PIO_PDR = mask;
}
/**
* \brief Configures one or more pin(s) of a PIO controller as being controlled by
* peripheral B. Optionally, the corresponding internal pull-up(s) can be enabled.
*
* \param pio Pointer to a PIO controller.
* \param mask Bitmask of one or more pin(s) to configure.
* \param enablePullUp Indicates if the pin(s) internal pull-up shall be
* configured.
*/
static void PIO_SetPeripheralB(
Pio *pio,
unsigned int mask,
unsigned char enablePullUp)
{
unsigned int abcdsr;
/* Disable interrupts on the pin(s) */
pio->PIO_IDR = mask;
/* Enable the pull-up(s) if necessary */
if (enablePullUp) {
pio->PIO_PUER = mask;
}
else {
pio->PIO_PUDR = mask;
}
abcdsr = pio->PIO_ABCDSR[0];
pio->PIO_ABCDSR[0] = (mask | abcdsr);
abcdsr = pio->PIO_ABCDSR[1];
pio->PIO_ABCDSR[1] &= (~mask & abcdsr);
pio->PIO_PDR = mask;
}
/**
* \brief Configures one or more pin(s) of a PIO controller as being controlled by
* peripheral C. Optionally, the corresponding internal pull-up(s) can be enabled.
*
* \param pio Pointer to a PIO controller.
* \param mask Bitmask of one or more pin(s) to configure.
* \param enablePullUp Indicates if the pin(s) internal pull-up shall be
* configured.
*/
static void PIO_SetPeripheralC(
Pio *pio,
unsigned int mask,
unsigned char enablePullUp)
{
unsigned int abcdsr;
/* Disable interrupts on the pin(s) */
pio->PIO_IDR = mask;
/* Enable the pull-up(s) if necessary */
if (enablePullUp) {
pio->PIO_PUER = mask;
}
else {
pio->PIO_PUDR = mask;
}
abcdsr = pio->PIO_ABCDSR[0];
pio->PIO_ABCDSR[0] &= (~mask & abcdsr);
abcdsr = pio->PIO_ABCDSR[1];
pio->PIO_ABCDSR[1] = (mask | abcdsr);
pio->PIO_PDR = mask;
}
/**
* \brief Configures one or more pin(s) of a PIO controller as being controlled by
* peripheral D. Optionally, the corresponding internal pull-up(s) can be enabled.
*
* \param pio Pointer to a PIO controller.
* \param mask Bitmask of one or more pin(s) to configure.
* \param enablePullUp Indicates if the pin(s) internal pull-up shall be
* configured.
*/
static void PIO_SetPeripheralD(
Pio *pio,
unsigned int mask,
unsigned char enablePullUp)
{
unsigned int abcdsr;
/* Disable interrupts on the pin(s) */
pio->PIO_IDR = mask;
/* Enable the pull-up(s) if necessary */
if (enablePullUp) {
pio->PIO_PUER = mask;
}
else {
pio->PIO_PUDR = mask;
}
abcdsr = pio->PIO_ABCDSR[0];
pio->PIO_ABCDSR[0] = (mask | abcdsr);
abcdsr = pio->PIO_ABCDSR[1];
pio->PIO_ABCDSR[1] = (mask | abcdsr);
pio->PIO_PDR = mask;
}
/**
* \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 pio Pointer to a PIO controller.
* \param mask Bitmask indicating which pin(s) to configure as input(s).
* \param enablePullUp Indicates if the internal pull-up(s) must be enabled.
* \param enableFilter Indicates if the glitch filter(s) must be enabled.
*/
static void PIO_SetInput(
Pio *pio,
unsigned int mask,
unsigned char attribute)
{
/* Disable interrupts */
pio->PIO_IDR = mask;
/* Enable pull-up(s) if necessary */
if (attribute & PIO_PULLUP)
pio->PIO_PUER = mask;
else
pio->PIO_PUDR = mask;
/* Enable Input Filter if necessary */
if (attribute & (PIO_DEGLITCH | PIO_DEBOUNCE))
pio->PIO_IFER = mask;
else
pio->PIO_IFDR = mask;
/* Enable de-glitch or de-bounce if necessary */
if (attribute & PIO_DEGLITCH)
{
pio->PIO_IFSCDR = mask;
}
else
{
if (attribute & PIO_DEBOUNCE)
{
pio->PIO_IFSCER = mask;
}
}
/* Configure pin as input */
pio->PIO_ODR = mask;
pio->PIO_PER = mask;
}
/**
* \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 pio Pointer to a PIO controller.
* \param mask 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.
*/
static void PIO_SetOutput(
Pio *pio,
unsigned int mask,
unsigned char defaultValue,
unsigned char enableMultiDrive,
unsigned char enablePullUp)
{
/* Disable interrupts */
pio->PIO_IDR = mask;
/* Enable pull-up(s) if necessary */
if (enablePullUp) {
pio->PIO_PUER = mask;
}
else {
pio->PIO_PUDR = mask;
}
/* Enable multi-drive if necessary */
if (enableMultiDrive) {
pio->PIO_MDER = mask;
}
else {
pio->PIO_MDDR = mask;
}
/* Set default value */
if (defaultValue) {
pio->PIO_SODR = mask;
}
else {
pio->PIO_CODR = mask;
}
/* Configure pin(s) as output(s) */
pio->PIO_OER = mask;
pio->PIO_PER = mask;
}
/*----------------------------------------------------------------------------
* Global functions
*----------------------------------------------------------------------------*/
/**
* \brief Configures a list of Pin instances, each of which can either hold a single
* pin or a group of pins, depending on the mask value; all pins are configured
* by this function. The size of the array must also be provided and is easily
* computed using PIO_LISTSIZE whenever its length is not known in advance.
*
* \param list Pointer to a list of Pin instances.
* \param size Size of the Pin list (calculated using PIO_LISTSIZE).
*
* \return 1 if the pins have been configured properly; otherwise 0.
*/
uint8_t PIO_Configure( const Pin *list, uint32_t size )
{
/* Configure pins */
while ( size > 0 )
{
switch ( list->type )
{
case PIO_PERIPH_A:
PIO_SetPeripheralA(list->pio,
list->mask,
(list->attribute & PIO_PULLUP) ? 1 : 0);
break;
case PIO_PERIPH_B:
PIO_SetPeripheralB(list->pio,
list->mask,
(list->attribute & PIO_PULLUP) ? 1 : 0);
break;
case PIO_PERIPH_C:
PIO_SetPeripheralC(list->pio,
list->mask,
(list->attribute & PIO_PULLUP) ? 1 : 0);
break;
case PIO_PERIPH_D:
PIO_SetPeripheralD(list->pio,
list->mask,
(list->attribute & PIO_PULLUP) ? 1 : 0);
break;
case PIO_INPUT:
PMC_EnablePeripheral(list->id);
PIO_SetInput(list->pio,
list->mask,
list->attribute);
break;
case PIO_OUTPUT_0:
case PIO_OUTPUT_1:
PIO_SetOutput(list->pio,
list->mask,
(list->type == PIO_OUTPUT_1),
(list->attribute & PIO_OPENDRAIN) ? 1 : 0,
(list->attribute & PIO_PULLUP) ? 1 : 0);
break;
default: return 0;
}
list++;
size--;
}
return 1;
}
/**
* \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.
*/
void PIO_Set(const Pin *pin)
{
pin->pio->PIO_SODR = pin->mask;
}
/**
* \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.
*/
void PIO_Clear(const Pin *pin)
{
pin->pio->PIO_CODR = pin->mask;
}
/**
* \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.
*/
unsigned char PIO_Get( const Pin *pin )
{
unsigned int reg ;
if ( (pin->type == PIO_OUTPUT_0) || (pin->type == PIO_OUTPUT_1) )
{
reg = pin->pio->PIO_ODSR ;
}
else
{
reg = pin->pio->PIO_PDSR ;
}
if ( (reg & pin->mask) == 0 )
{
return 0 ;
}
else
{
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 pin 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.
*/
unsigned char PIO_GetOutputDataStatus(const Pin *pin)
{
if ((pin->pio->PIO_ODSR & pin->mask) == 0) {
return 0;
}
else {
return 1;
}
}
/*
* \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.
*/
void PIO_SetDebounceFilter( const Pin *pin, uint32_t cuttoff )
{
Pio *pio = pin->pio;
pio->PIO_IFSCER = pin->mask; /* set Debouncing, 0 bit field no effect */
pio->PIO_SCDR = ((32678/(2*(cuttoff))) - 1) & 0x3FFF; /* the lowest 14 bits work */
}
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