From 98f9d442b44dbe2e3e4b3c8296be7e78d5d05450 Mon Sep 17 00:00:00 2001 From: Harald Welte Date: Sun, 24 Jul 2011 09:39:28 +0200 Subject: initial import of the usb ccid example for the sam7s --- at91lib/peripherals/aic/aic.c | 87 +++++++++++++++++++++++++++++++++++++++++++ at91lib/peripherals/aic/aic.h | 79 +++++++++++++++++++++++++++++++++++++++ 2 files changed, 166 insertions(+) create mode 100644 at91lib/peripherals/aic/aic.c create mode 100644 at91lib/peripherals/aic/aic.h (limited to 'at91lib/peripherals/aic') diff --git a/at91lib/peripherals/aic/aic.c b/at91lib/peripherals/aic/aic.c new file mode 100644 index 0000000..4ff52c2 --- /dev/null +++ b/at91lib/peripherals/aic/aic.c @@ -0,0 +1,87 @@ +/* ---------------------------------------------------------------------------- + * 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 "aic.h" +#include + +//------------------------------------------------------------------------------ +// Global functions +//------------------------------------------------------------------------------ + +//------------------------------------------------------------------------------ +/// Configures an interrupt in the AIC. The interrupt is identified by its +/// source (AT91C_ID_xxx) and is configured to use the specified mode and +/// interrupt handler function. Mode is the value that will be put in AIC_SMRx +/// and the function address will be set in AIC_SVRx. +/// The interrupt is disabled before configuration, so it is useless +/// to do it before calling this function. When AIC_ConfigureIT returns, the +/// interrupt will always be disabled and cleared; it must be enabled by a +/// call to AIC_EnableIT(). +/// \param source Interrupt source to configure. +/// \param mode Triggering mode and priority of the interrupt. +/// \param handler Interrupt handler function. +//------------------------------------------------------------------------------ +void AIC_ConfigureIT( + unsigned int source, + unsigned int mode, + void (*handler)(void)) +{ + // Disable the interrupt first + AT91C_BASE_AIC->AIC_IDCR = 1 << source; + + // Configure mode and handler + AT91C_BASE_AIC->AIC_SMR[source] = mode; + AT91C_BASE_AIC->AIC_SVR[source] = (unsigned int) handler; + + // Clear interrupt + AT91C_BASE_AIC->AIC_ICCR = 1 << source; +} + +//------------------------------------------------------------------------------ +/// Enables interrupts coming from the given (unique) source (AT91C_ID_xxx). +/// \param source Interrupt source to enable. +//------------------------------------------------------------------------------ +void AIC_EnableIT(unsigned int source) +{ + AT91C_BASE_AIC->AIC_IECR = 1 << source; +} + +//------------------------------------------------------------------------------ +/// Disables interrupts coming from the given (unique) source (AT91C_ID_xxx). +/// \param source Interrupt source to enable. +//------------------------------------------------------------------------------ +void AIC_DisableIT(unsigned int source) +{ + AT91C_BASE_AIC->AIC_IDCR = 1 << source; +} + diff --git a/at91lib/peripherals/aic/aic.h b/at91lib/peripherals/aic/aic.h new file mode 100644 index 0000000..bddf787 --- /dev/null +++ b/at91lib/peripherals/aic/aic.h @@ -0,0 +1,79 @@ +/* ---------------------------------------------------------------------------- + * 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 +/// +/// Methods and definitions for configuring interrupts using the Advanced +/// Interrupt Controller (AIC). +/// +/// !Usage +/// +/// -# Configure an interrupt source using AIC_ConfigureIT +/// -# Enable or disable interrupt generation of a particular source with +/// AIC_EnableIT and AIC_DisableIT. +/// +/// \note Most of the time, peripheral interrupts must be also configured +/// inside the peripheral itself. +//------------------------------------------------------------------------------ + +#ifndef AIC_H +#define AIC_H + +//------------------------------------------------------------------------------ +// Headers +//------------------------------------------------------------------------------ + +#include + +//------------------------------------------------------------------------------ +// Definitions +//------------------------------------------------------------------------------ + +#ifndef AT91C_AIC_SRCTYPE_INT_HIGH_LEVEL + /// Interrupt is internal and uses a logical 1 level. + #define AT91C_AIC_SRCTYPE_INT_HIGH_LEVEL AT91C_AIC_SRCTYPE_INT_LEVEL_SENSITIVE +#endif + +//------------------------------------------------------------------------------ +// Global functions +//------------------------------------------------------------------------------ + +extern void AIC_ConfigureIT(unsigned int source, + unsigned int mode, + void (*handler)( void )); + +extern void AIC_EnableIT(unsigned int source); + +extern void AIC_DisableIT(unsigned int source); + +#endif //#ifndef AIC_H + -- cgit v1.2.3