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336
Demo/Common/drivers/Atmel/at91lib/peripherals/pio/pio.c Normal file
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/* ----------------------------------------------------------------------------
* ATMEL Microcontroller Software Support
* ----------------------------------------------------------------------------
* Copyright (c) 2008, 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.
* ----------------------------------------------------------------------------
*/
//------------------------------------------------------------------------------
// Headers
//------------------------------------------------------------------------------
#include "pio.h"
#include <board.h>
//------------------------------------------------------------------------------
// Internal definitions
//------------------------------------------------------------------------------
/// \internal Returns the current value of a register.
#define READ(peripheral, register) (peripheral->register)
/// \internal Modifies the current value of a register.
#define WRITE(peripheral, register, value) (peripheral->register = value)
//------------------------------------------------------------------------------
// Internal functions
//------------------------------------------------------------------------------
//------------------------------------------------------------------------------
/// 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(AT91S_PIO *pio,
unsigned int mask,
unsigned char enablePullUp)
{
// Disable interrupts on the pin(s)
WRITE(pio, PIO_IDR, mask);
// Enable the pull-up(s) if necessary
if (enablePullUp) {
WRITE(pio, PIO_PPUER, mask);
}
else {
WRITE(pio, PIO_PPUDR, mask);
}
// Configure pin
WRITE(pio, PIO_ASR, mask);
WRITE(pio, PIO_PDR, mask);
}
//------------------------------------------------------------------------------
/// 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_SetPeripheralB(AT91S_PIO *pio,
unsigned int mask,
unsigned char enablePullUp)
{
// Disable interrupts on the pin(s)
WRITE(pio, PIO_IDR, mask);
// Enable the pull-up(s) if necessary
if (enablePullUp) {
WRITE(pio, PIO_PPUER, mask);
}
else {
WRITE(pio, PIO_PPUDR, mask);
}
// Configure pin
WRITE(pio, PIO_BSR, mask);
WRITE(pio, PIO_PDR, mask);
}
//------------------------------------------------------------------------------
/// 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(AT91S_PIO *pio,
unsigned int mask,
unsigned char enablePullUp,
unsigned char enableFilter)
{
// Disable interrupts
WRITE(pio, PIO_IDR, mask);
// Enable pull-up(s) if necessary
if (enablePullUp) {
WRITE(pio, PIO_PPUER, mask);
}
else {
WRITE(pio, PIO_PPUDR, mask);
}
// Enable filter(s) if necessary
if (enableFilter) {
WRITE(pio, PIO_IFER, mask);
}
else {
WRITE(pio, PIO_IFDR, mask);
}
// Configure pin as input
WRITE(pio, PIO_ODR, mask);
WRITE(pio, PIO_PER, mask);
}
//------------------------------------------------------------------------------
/// 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(AT91S_PIO *pio,
unsigned int mask,
unsigned char defaultValue,
unsigned char enableMultiDrive,
unsigned char enablePullUp)
{
// Disable interrupts
WRITE(pio, PIO_IDR, mask);
// Enable pull-up(s) if necessary
if (enablePullUp) {
WRITE(pio, PIO_PPUER, mask);
}
else {
WRITE(pio, PIO_PPUDR, mask);
}
// Enable multi-drive if necessary
if (enableMultiDrive) {
WRITE(pio, PIO_MDER, mask);
}
else {
WRITE(pio, PIO_MDDR, mask);
}
// Set default value
if (defaultValue) {
WRITE(pio, PIO_SODR, mask);
}
else {
WRITE(pio, PIO_CODR, mask);
}
// Configure pin(s) as output(s)
WRITE(pio, PIO_OER, mask);
WRITE(pio, PIO_PER, mask);
}
//------------------------------------------------------------------------------
// Exported functions
//------------------------------------------------------------------------------
//------------------------------------------------------------------------------
/// Configures a list of Pin instances, which can either hold a single pin or a
/// group of pins, depending on the mask value; all pins are configured by this
/// function.
/// Returns 1 if the configuration has been performed successfully; otherwise 0.
/// \param list Pointer to a list of Pin instances.
/// \param size Size of the Pin list (see <PIO_LISTSIZE>).
//------------------------------------------------------------------------------
unsigned char PIO_Configure(const Pin *list, unsigned int 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_INPUT:
AT91C_BASE_PMC->PMC_PCER = 1 << list->id;
PIO_SetInput(list->pio,
list->mask,
(list->attribute & PIO_PULLUP) ? 1 : 0,
(list->attribute & PIO_DEGLITCH)? 1 : 0);
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;
}
//------------------------------------------------------------------------------
/// Sets a high output level on one or more pin(s) (if configured as output(s)).
/// \param pin Pointer to a Pin instance describing one or more pins.
//------------------------------------------------------------------------------
void PIO_Set(const Pin *pin)
{
WRITE(pin->pio, PIO_SODR, pin->mask);
}
//------------------------------------------------------------------------------
/// Sets a low output level on one or more pin(s) (if configured as output(s)).
/// \param pin Pointer to a Pin instance describing one or more pins.
//------------------------------------------------------------------------------
void PIO_Clear(const Pin *pin)
{
WRITE(pin->pio, PIO_CODR, pin->mask);
}
//------------------------------------------------------------------------------
/// Returns 1 if one or more PIO of the given Pin instance currently have a high
/// level; otherwise returns 0.
/// \param pin Pointer to a Pin instance describing one or more pins.
//------------------------------------------------------------------------------
unsigned char PIO_Get(const Pin *pin)
{
unsigned int reg;
if ((pin->type == PIO_OUTPUT_0) || (pin->type == PIO_OUTPUT_1)) {
reg = READ(pin->pio, PIO_ODSR);
}
else {
reg = READ(pin->pio, PIO_PDSR);
}
if ((reg & pin->mask) == 0) {
return 0;
}
else {
return 1;
}
}
//------------------------------------------------------------------------------
/// Returns 1 if one or more PIO of the given Pin data to be driven on the I/O line
/// level; otherwise returns 0.
/// \param pin Pointer to a Pin instance describing one or more pins.
//------------------------------------------------------------------------------
unsigned char PIO_GetOutputDataStatus(const Pin *pin)
{
if ((READ(pin->pio, PIO_ODSR) & pin->mask) == 0) {
return 0;
}
else {
return 1;
}
}
//------------------------------------------------------------------------------
/// Returns the value of ISR for the PIO controller of the pin.
/// Reading this register acknoledges all the ITs.
/// \param pin Pointer to a Pin instance describing one or more pins.
//------------------------------------------------------------------------------
unsigned int PIO_GetISR(const Pin *pin)
{
return (READ(pin->pio, PIO_ISR));
}

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Demo/Common/drivers/Atmel/at91lib/peripherals/pio/pio.h Normal file
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/* ----------------------------------------------------------------------------
* ATMEL Microcontroller Software Support
* ----------------------------------------------------------------------------
* Copyright (c) 2008, 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.
* ----------------------------------------------------------------------------
*/
//------------------------------------------------------------------------------
/// \dir
/// !Purpose
///
/// Definition of methods and structures for using PIOs in a transparent
/// way. The main purpose is to allow portability between several boards.
///
/// !Usage
///
/// -# To configure and use pins, see pio.h.
/// -# To enable and use interrupt generation on PIO status change, see
/// pio_it.h.
//------------------------------------------------------------------------------
//------------------------------------------------------------------------------
/// \unit
/// !Purpose
///
/// Simple & portable usage of PIO pins.
///
/// !Usage
///
/// -# Define a constant pin description array such as the following one:
/// \code
/// const Pin at91board_dbgu[] = {
/// {AT91C_BASE_PIOA, (1 << 30), PIO_PERIPH_A, PIO_DEFAULT},
/// {AT91C_BASE_PIOA, (1 << 31), PIO_PERIPH_A, PIO_DEFAULT},
/// };
/// \endcode
/// Alternatively, constants defined in the piodefs.h header file of the
/// board module can be used:
/// \code
/// const Pin at91board_dbgu[] = {PINS_DBGU};
/// const Pin at91board_usart[] = {PIN_USART0_RXD, PIN_USART0_TXD};
/// \endcode
/// It is possible to group multiple pins if they share the same
/// attributes, to save memory. Here is the previous DBGU example
/// rewritten in such a way:
/// \code
/// const Pin at91board_dbgu[] = {
/// {AT91C_BASE_PIOA, 0xC0000000, PIO_PERIPH_A, PIO_DEFAULT}
/// };
/// \endcode
/// -# For pins configured as inputs, the PIO controller must be enabled
/// in the PMC (*enabled by PIO_Configure at the moment*).
/// -# Configure a pin array by calling PIO_Configure, using
/// the PIO_LISTSIZE macro to calculate the array size if needed. Do not
/// forget to check the return value for any error.
/// -# Set and get the value of a pin using the PIO_Set, PIO_Clear and
/// PIO_Get methods.
//------------------------------------------------------------------------------
#ifndef PIO_H
#define PIO_H
//------------------------------------------------------------------------------
// Headers
//------------------------------------------------------------------------------
#include <board.h>
//------------------------------------------------------------------------------
// Definitions
//------------------------------------------------------------------------------
//------------------------------------------------------------------------------
/// \page "Pin types"
/// This page lists the available types for a Pin instance (in its type field).
/// !Types
/// - PIO_PERIPH_A
/// - PIO_PERIPH_B
/// - PIO_INPUT
/// - PIO_OUTPUT_0
/// - PIO_OUTPUT_1
/// The pin is controlled by the associated signal of peripheral A.
#define PIO_PERIPH_A 0
/// The pin is controlled by the associated signal of peripheral B.
#define PIO_PERIPH_B 1
/// The pin is an input.
#define PIO_INPUT 2
/// The pin is an output and has a default level of 0.
#define PIO_OUTPUT_0 3
/// The pin is an output and has a default level of 1.
#define PIO_OUTPUT_1 4
//------------------------------------------------------------------------------
//------------------------------------------------------------------------------
/// \page "Pin attributes"
/// This page lists the valid values for the attribute field of a Pin instance.
/// !Attributes
/// - PIO_DEFAULT
/// - PIO_PULLUP
/// - PIO_DEGLITCH
/// - PIO_OPENDRAIN
/// Default pin configuration (no attribute).
#define PIO_DEFAULT (0 << 0)
/// The internal pin pull-up is active.
#define PIO_PULLUP (1 << 0)
/// The internal glitch filter is active.
#define PIO_DEGLITCH (1 << 1)
/// The pin is open-drain.
#define PIO_OPENDRAIN (1 << 2)
//------------------------------------------------------------------------------
/// Calculates the size of a Pin instances array. The array must be local (i.e.
/// not a pointer), otherwise the computation will not be correct.
#define PIO_LISTSIZE(list) (sizeof(list) / sizeof(Pin))
//------------------------------------------------------------------------------
// Types
//------------------------------------------------------------------------------
//------------------------------------------------------------------------------
/// Describes the type and attribute of one PIO pin or a group of similar pins.
typedef struct {
/// Bitmask indicating which pin(s) to configure.
unsigned int mask;
/// Pointer to the PIO controller which has the pin(s).
AT91S_PIO *pio;
/// Peripheral ID of the PIO controller which has the pin(s).
unsigned char id;
/// Pin type (see "Pin types").
unsigned char type;
/// Pin attribute (see "Pin attributes").
unsigned char attribute;
} Pin;
//------------------------------------------------------------------------------
//------------------------------------------------------------------------------
// Exported functions
//------------------------------------------------------------------------------
extern unsigned char PIO_Configure(const Pin *list, unsigned int size);
extern void PIO_Set(const Pin *pin );
extern void PIO_Clear(const Pin *pin);
extern unsigned char PIO_Get(const Pin *pin);
extern unsigned int PIO_GetISR(const Pin *pin);
extern unsigned char PIO_GetOutputDataStatus(const Pin *pin);
#endif //#ifndef PIO_H

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Demo/Common/drivers/Atmel/at91lib/peripherals/pio/pio_it.c Normal file
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/* ----------------------------------------------------------------------------
* ATMEL Microcontroller Software Support
* ----------------------------------------------------------------------------
* Copyright (c) 2008, 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.
* ----------------------------------------------------------------------------
*/
/// Disable traces for this file
#ifndef NOTRACE
#define NOTRACE
#endif
//------------------------------------------------------------------------------
// Headers
//------------------------------------------------------------------------------
#include "pio_it.h"
#include "pio.h"
#include <aic/aic.h>
#include <board.h>
#include <utility/assert.h>
#include <utility/trace.h>
//------------------------------------------------------------------------------
// Local definitions
//------------------------------------------------------------------------------
/// Returns the current value of a register.
#define READ(peripheral, register) (peripheral->register)
/// Modifies the current value of a register.
#define WRITE(peripheral, register, value) (peripheral->register = value)
/// Maximum number of interrupt sources that can be defined.
#define MAX_INTERRUPT_SOURCES 7
//------------------------------------------------------------------------------
// Local types
//------------------------------------------------------------------------------
/// Describes a PIO interrupt source, including the PIO instance triggering the
/// interrupt and the associated interrupt handler.
typedef struct _InterruptSource {
/// Interrupt source pin.
const Pin *pPin;
/// Interrupt handler.
void (*handler)(const Pin *);
} InterruptSource;
//------------------------------------------------------------------------------
// Local variables
//------------------------------------------------------------------------------
/// List of interrupt sources.
static InterruptSource pSources[MAX_INTERRUPT_SOURCES];
/// Number of currently defined interrupt sources.
static unsigned int numSources;
//------------------------------------------------------------------------------
// Local functions
//------------------------------------------------------------------------------
//------------------------------------------------------------------------------
/// Handles all interrupts on the given PIO controller.
/// \param id PIO controller ID.
/// \param pBase PIO controller base address.
//------------------------------------------------------------------------------
void PioInterruptHandler(unsigned int id, AT91S_PIO *pBase)
{
unsigned int status;
unsigned int i;
// Check PIO controller status
status = pBase->PIO_ISR;
status &= pBase->PIO_IMR;
if (status != 0) {
trace_LOG(trace_DEBUG, "-D- PIO interrupt on PIO controller #%d\n\r", id);
// Check all sources
i = 0;
while (status != 0) {
// There cannot be an unconfigured source enabled.
SANITY_CHECK(i < numSources);
// Source if configured on PIOA
if (pSources[i].pPin->id == id) {
// Source has PIOs which have changed
if ((status & pSources[i].pPin->mask) != 0) {
trace_LOG(trace_DEBUG, "-D- Interrupt source #%d triggered\n\r", i);
pSources[i].handler(pSources[i].pPin);
status &= ~(pSources[i].pPin->mask);
}
}
i++;
}
}
}
//------------------------------------------------------------------------------
/// Generic PIO interrupt handler. Single entry point for interrupts coming
/// from any PIO controller (PIO A, B, C ...). Dispatches the interrupt to
/// the user-configured handlers.
//------------------------------------------------------------------------------
void InterruptHandler()
{
#if defined(AT91C_ID_PIOA)
// Treat PIOA interrupts
PioInterruptHandler(AT91C_ID_PIOA, AT91C_BASE_PIOA);
#endif
#if defined(AT91C_ID_PIOB)
// Treat PIOB interrupts
PioInterruptHandler(AT91C_ID_PIOB, AT91C_BASE_PIOB);
#endif
#if defined(AT91C_ID_PIOC)
// Treat PIOC interrupts
PioInterruptHandler(AT91C_ID_PIOC, AT91C_BASE_PIOC);
#endif
#if defined(AT91C_ID_PIOD)
// Treat PIOD interrupts
PioInterruptHandler(AT91C_ID_PIOD, AT91C_BASE_PIOD);
#endif
#if defined(AT91C_ID_PIOE)
// Treat PIOE interrupts
PioInterruptHandler(AT91C_ID_PIOE, AT91C_BASE_PIOE);
#endif
#if defined(AT91C_ID_PIOABCD)
// Treat PIOABCD interrupts
#if !defined(AT91C_ID_PIOA)
PioInterruptHandler(AT91C_ID_PIOABCD, AT91C_BASE_PIOA);
#endif
#if !defined(AT91C_ID_PIOB)
PioInterruptHandler(AT91C_ID_PIOABCD, AT91C_BASE_PIOB);
#endif
#if !defined(AT91C_ID_PIOC)
PioInterruptHandler(AT91C_ID_PIOABCD, AT91C_BASE_PIOC);
#endif
#if !defined(AT91C_ID_PIOD)
PioInterruptHandler(AT91C_ID_PIOABCD, AT91C_BASE_PIOD);
#endif
#endif
#if defined(AT91C_ID_PIOABCDE)
// Treat PIOABCDE interrupts
#if !defined(AT91C_ID_PIOA)
PioInterruptHandler(AT91C_ID_PIOABCDE, AT91C_BASE_PIOA);
#endif
#if !defined(AT91C_ID_PIOB)
PioInterruptHandler(AT91C_ID_PIOABCDE, AT91C_BASE_PIOB);
#endif
#if !defined(AT91C_ID_PIOC)
PioInterruptHandler(AT91C_ID_PIOABCDE, AT91C_BASE_PIOC);
#endif
#if !defined(AT91C_ID_PIOD)
PioInterruptHandler(AT91C_ID_PIOABCDE, AT91C_BASE_PIOD);
#endif
#if !defined(AT91C_ID_PIOE)
PioInterruptHandler(AT91C_ID_PIOABCDE, AT91C_BASE_PIOE);
#endif
#endif
#if defined(AT91C_ID_PIOCDE)
// Treat PIOCDE interrupts
#if !defined(AT91C_ID_PIOC)
PioInterruptHandler(AT91C_ID_PIOCDE, AT91C_BASE_PIOC);
#endif
#if !defined(AT91C_ID_PIOD)
PioInterruptHandler(AT91C_ID_PIOCDE, AT91C_BASE_PIOD);
#endif
#if !defined(AT91C_ID_PIOE)
PioInterruptHandler(AT91C_ID_PIOCDE, AT91C_BASE_PIOE);
#endif
#endif
}
//------------------------------------------------------------------------------
// Global functions
//------------------------------------------------------------------------------
//------------------------------------------------------------------------------
/// Initializes the PIO interrupt management logic.
/// \param priority PIO controller interrupts priority.
//------------------------------------------------------------------------------
void PIO_InitializeInterrupts(unsigned int priority)
{
trace_LOG(trace_DEBUG, "-D- PIO_Initialize()\n\r");
SANITY_CHECK((priority & ~AT91C_AIC_PRIOR) == 0);
// Reset sources
numSources = 0;
#ifdef AT91C_ID_PIOA
// Configure PIO interrupt sources
trace_LOG(trace_DEBUG, "-D- PIO_Initialize: Configuring PIOA\n\r");
AT91C_BASE_PMC->PMC_PCER = 1 << AT91C_ID_PIOA;
AT91C_BASE_PIOA->PIO_ISR;
AT91C_BASE_PIOA->PIO_IDR = 0xFFFFFFFF;
AIC_ConfigureIT(AT91C_ID_PIOA, priority, InterruptHandler);
AIC_EnableIT(AT91C_ID_PIOA);
#endif
#ifdef AT91C_ID_PIOB
trace_LOG(trace_DEBUG, "-D- PIO_Initialize: Configuring PIOB\n\r");
AT91C_BASE_PMC->PMC_PCER = 1 << AT91C_ID_PIOB;
AT91C_BASE_PIOB->PIO_ISR;
AT91C_BASE_PIOB->PIO_IDR = 0xFFFFFFFF;
AIC_ConfigureIT(AT91C_ID_PIOB, priority, InterruptHandler);
AIC_EnableIT(AT91C_ID_PIOB);
#endif
#ifdef AT91C_ID_PIOC
trace_LOG(trace_DEBUG, "-D- PIO_Initialize: Configuring PIOC\n\r");
AT91C_BASE_PMC->PMC_PCER = 1 << AT91C_ID_PIOC;
AT91C_BASE_PIOC->PIO_ISR;
AT91C_BASE_PIOC->PIO_IDR = 0xFFFFFFFF;
AIC_ConfigureIT(AT91C_ID_PIOC, priority, InterruptHandler);
AIC_EnableIT(AT91C_ID_PIOC);
#endif
#ifdef AT91C_ID_PIOD
trace_LOG(trace_DEBUG, "-D- PIO_Initialize: Configuring PIOD\n\r");
AT91C_BASE_PMC->PMC_PCER = 1 << AT91C_ID_PIOD;
AT91C_BASE_PIOC->PIO_ISR;
AT91C_BASE_PIOC->PIO_IDR = 0xFFFFFFFF;
AIC_ConfigureIT(AT91C_ID_PIOD, priority, InterruptHandler);
AIC_EnableIT(AT91C_ID_PIOD);
#endif
#ifdef AT91C_ID_PIOE
trace_LOG(trace_DEBUG, "-D- PIO_Initialize: Configuring PIOE\n\r");
AT91C_BASE_PMC->PMC_PCER = 1 << AT91C_ID_PIOE;
AT91C_BASE_PIOC->PIO_ISR;
AT91C_BASE_PIOC->PIO_IDR = 0xFFFFFFFF;
AIC_ConfigureIT(AT91C_ID_PIOE, priority, InterruptHandler);
AIC_EnableIT(AT91C_ID_PIOE);
#endif
#if defined(AT91C_ID_PIOABCD)
// Treat PIOABCD interrupts
#if !defined(AT91C_ID_PIOA) \
&& !defined(AT91C_ID_PIOB) \
&& !defined(AT91C_ID_PIOC) \
&& !defined(AT91C_ID_PIOD)
trace_LOG(trace_DEBUG, "-D- PIO_Initialize: Configuring PIOABCD\n\r");
AT91C_BASE_PMC->PMC_PCER = 1 << AT91C_ID_PIOABCD;
AT91C_BASE_PIOA->PIO_ISR;
AT91C_BASE_PIOA->PIO_IDR = 0xFFFFFFFF;
AIC_ConfigureIT(AT91C_ID_PIOABCD, priority, InterruptHandler);
AIC_EnableIT(AT91C_ID_PIOABCD);
#endif
#endif
#if defined(AT91C_ID_PIOABCDE)
// Treat PIOABCDE interrupts
#if !defined(AT91C_ID_PIOA) \
&& !defined(AT91C_ID_PIOB) \
&& !defined(AT91C_ID_PIOC) \
&& !defined(AT91C_ID_PIOD) \
&& !defined(AT91C_ID_PIOE)
trace_LOG(trace_DEBUG, "-D- PIO_Initialize: Configuring PIOABCDE\n\r");
AT91C_BASE_PMC->PMC_PCER = 1 << AT91C_ID_PIOABCDE;
AT91C_BASE_PIOA->PIO_ISR;
AT91C_BASE_PIOA->PIO_IDR = 0xFFFFFFFF;
AIC_ConfigureIT(AT91C_ID_PIOABCDE, priority, InterruptHandler);
AIC_EnableIT(AT91C_ID_PIOABCDE);
#endif
#endif
#if defined(AT91C_ID_PIOCDE)
// Treat PIOCDE interrupts
#if !defined(AT91C_ID_PIOC) \
&& !defined(AT91C_ID_PIOD) \
&& !defined(AT91C_ID_PIOE)
trace_LOG(trace_DEBUG, "-D- PIO_Initialize: Configuring PIOC\n\r");
AT91C_BASE_PMC->PMC_PCER = 1 << AT91C_ID_PIOCDE;
AT91C_BASE_PIOC->PIO_ISR;
AT91C_BASE_PIOC->PIO_IDR = 0xFFFFFFFF;
AIC_ConfigureIT(AT91C_ID_PIOCDE, priority, InterruptHandler);
AIC_EnableIT(AT91C_ID_PIOCDE);
#endif
#endif
}
//------------------------------------------------------------------------------
/// Configures an interrupt source.
/// \param pPin Interrupt source.
/// \param handler Desired interrupt handler for the source.
//------------------------------------------------------------------------------
void PIO_ConfigureIt(const Pin *pPin, void (*handler)(const Pin *))
{
InterruptSource *pSource;
trace_LOG(trace_DEBUG, "-D- PIO_ConfigureIt()\n\r");
SANITY_CHECK(pPin);
ASSERT(numSources < MAX_INTERRUPT_SOURCES,
"-F- PIO_ConfigureIt: Increase MAX_INTERRUPT_SOURCES\n\r");
// Define new source
trace_LOG(trace_DEBUG, "-D- PIO_ConfigureIt: Defining new source #%d.\n\r", numSources);
pSource = &(pSources[numSources]);
pSource->pPin = pPin;
pSource->handler = handler;
numSources++;
}
//------------------------------------------------------------------------------
/// Enables the given interrupt source if it has been configured.
/// \param pPin Interrupt source to enable.
//------------------------------------------------------------------------------
void PIO_EnableIt(const Pin *pPin)
{
trace_LOG(trace_DEBUG, "-D- PIO_EnableIt()\n\r");
SANITY_CHECK(pPin);
#ifndef NOASSERT
unsigned int i = 0;
unsigned char found = 0;
while ((i < numSources) && !found) {
if (pSources[i].pPin == pPin) {
found = 1;
}
i++;
}
ASSERT(found, "-F- PIO_EnableIt: Interrupt source has not been configured\n\r");
#endif
pPin->pio->PIO_ISR;
pPin->pio->PIO_IER = pPin->mask;
}
//------------------------------------------------------------------------------
/// Disables a given interrupt source.
/// \param pPin Interrupt source to disable.
//------------------------------------------------------------------------------
void PIO_DisableIt(const Pin *pPin)
{
SANITY_CHECK(pPin);
trace_LOG(trace_DEBUG, "-D- PIO_DisableIt()\n\r");
pPin->pio->PIO_IDR = pPin->mask;
}

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Demo/Common/drivers/Atmel/at91lib/peripherals/pio/pio_it.h Normal file
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/* ----------------------------------------------------------------------------
* ATMEL Microcontroller Software Support
* ----------------------------------------------------------------------------
* Copyright (c) 2008, 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.
* ----------------------------------------------------------------------------
*/
//------------------------------------------------------------------------------
/// \unit
/// !Purpose
///
/// Configuration and handling of interrupts on PIO status changes.
///
/// !Usage
///
/// -# Configure an status change interrupt on one or more pin(s) with
/// PIO_ConfigureIt.
/// -# Enable & disable interrupts on pins using PIO_EnableIt and
/// PIO_DisableIt.
//------------------------------------------------------------------------------
//------------------------------------------------------------------------------
// Headers
//------------------------------------------------------------------------------
#include "pio.h"
//------------------------------------------------------------------------------
// Global functions
//------------------------------------------------------------------------------
extern void PIO_InitializeInterrupts(unsigned int priority);
extern void PIO_ConfigureIt(const Pin *pPin, void (*handler)(const Pin *));
extern void PIO_EnableIt(const Pin *pPin);
extern void PIO_DisableIt(const Pin *pPin);