/** | |
* \file | |
* | |
* \brief EIC driver for SAM | |
* | |
* Copyright (c) 2012 Atmel Corporation. All rights reserved. | |
* | |
* \asf_license_start | |
* | |
* \page License | |
* | |
* Redistribution and use in source and binary forms, with or without | |
* modification, are permitted provided that the following conditions are met: | |
* | |
* 1. Redistributions of source code must retain the above copyright notice, | |
* this list of conditions and the following disclaimer. | |
* | |
* 2. Redistributions in binary form must reproduce the above copyright notice, | |
* this list of conditions and the following disclaimer in the documentation | |
* and/or other materials provided with the distribution. | |
* | |
* 3. The name of Atmel may not be used to endorse or promote products derived | |
* from this software without specific prior written permission. | |
* | |
* 4. This software may only be redistributed and used in connection with an | |
* Atmel microcontroller product. | |
* | |
* 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 | |
* EXPRESSLY AND SPECIFICALLY 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. | |
* | |
* \asf_license_stop | |
* | |
*/ | |
#include "eic.h" | |
#include "sysclk.h" | |
#include "sleepmgr.h" | |
/// @cond 0 | |
/**INDENT-OFF**/ | |
#ifdef __cplusplus | |
extern "C" { | |
#endif | |
/**INDENT-ON**/ | |
/// @endcond | |
/** | |
* \defgroup sam_drivers_eic_group External Interrupt Controller(EIC) | |
* | |
* See \ref sam_eic_quickstart. | |
* | |
* EIC allows pins to be configured as external interrupts. | |
* | |
* @{ | |
*/ | |
/** | |
* \internal | |
* \brief EIC callback function pointer array | |
*/ | |
eic_callback_t eic_callback_pointer[EIC_NUMBER_OF_LINES]; | |
/** | |
* \brief Write the EIC hardware with specified configuration value. | |
* | |
* \param eic Base address of the EIC module | |
* \param eic_line_conf Configuration parameters of the EIC module | |
* (see \ref eic_line_config) | |
* \param line_number Number of line to config | |
*/ | |
void eic_line_set_config(Eic *eic, uint8_t line_number, | |
struct eic_line_config *eic_line_conf) | |
{ | |
/* Set up mode level */ | |
eic->EIC_MODE = (eic_line_conf->eic_mode == EIC_MODE_LEVEL_TRIGGERED) | |
? (eic->EIC_MODE | (1 << line_number)) | |
: (eic->EIC_MODE & ~(1 << line_number)); | |
/* Set up edge type */ | |
eic->EIC_EDGE = (eic_line_conf->eic_edge == EIC_EDGE_RISING_EDGE) | |
? (eic->EIC_EDGE | (1 << line_number)) | |
: (eic->EIC_EDGE & ~(1 << line_number)); | |
/* Set up level */ | |
eic->EIC_LEVEL = (eic_line_conf->eic_level == EIC_LEVEL_HIGH_LEVEL) | |
? (eic->EIC_LEVEL | (1 << line_number)) | |
: (eic->EIC_LEVEL & ~(1 << line_number)); | |
/* Set up if filter is used */ | |
eic->EIC_FILTER = (eic_line_conf->eic_filter == EIC_FILTER_ENABLED) | |
? (eic->EIC_FILTER | (1 << line_number)) | |
: (eic->EIC_FILTER & ~(1 << line_number)); | |
/* Set up which mode is used : asynchronous mode/ synchronous mode */ | |
eic->EIC_ASYNC = (eic_line_conf->eic_async == EIC_ASYNCH_MODE) | |
? (eic->EIC_ASYNC | (1 << line_number)) | |
: (eic->EIC_ASYNC & ~(1 << line_number)); | |
} | |
/** | |
* \brief Disable the EIC module | |
* | |
* \param eic Base address of the EIC module | |
*/ | |
void eic_disable(Eic *eic) | |
{ | |
sysclk_disable_peripheral_clock(eic); | |
sleepmgr_unlock_mode(SLEEPMGR_BACKUP); | |
} | |
/** | |
* \brief Enable the EIC module | |
* | |
* \param eic Base address of the EIC module | |
*/ | |
void eic_enable(Eic *eic) | |
{ | |
sysclk_enable_peripheral_clock(eic); | |
sleepmgr_lock_mode(SLEEPMGR_BACKUP); | |
} | |
/** | |
* \brief Set callback for given EIC line | |
* | |
* \param eic Base address of the EIC module | |
* \param line_number Number of line. | |
* \param callback callback function pointer. | |
* \param irq_line interrupt line. | |
* \param irq_level interrupt level. | |
*/ | |
void eic_line_set_callback(Eic *eic, uint8_t line_number, | |
eic_callback_t callback, uint8_t irq_line, uint8_t irq_level) | |
{ | |
eic_callback_pointer[line_number] = callback; | |
irq_register_handler((IRQn_Type)irq_line, irq_level); | |
eic_line_enable_interrupt(eic, line_number); | |
} | |
/** | |
* \internal | |
* \brief Common EIC line interrupt handler | |
* | |
* The optional callback used by the interrupt handler is set by the | |
* eic_line_set_callback() function. | |
* | |
* \param line_number EIC linel number to handle interrupt for | |
*/ | |
static void eic_line_interrupt(uint8_t line_number) | |
{ | |
if (eic_callback_pointer[line_number]) { | |
eic_callback_pointer[line_number](); | |
} else { | |
Assert(false); /* Catch unexpected interrupt */ | |
} | |
} | |
/** | |
* \brief Interrupt handler for EIC NMI. | |
*/ | |
void NMI_Handler(void) | |
{ | |
eic_line_interrupt(0); | |
} | |
/** | |
* \brief Interrupt handler for EIC line 1. | |
*/ | |
void EIC_1_Handler(void) | |
{ | |
eic_line_interrupt(1); | |
} | |
/** | |
* \brief Interrupt handler for EIC line 2. | |
*/ | |
void EIC_2_Handler(void) | |
{ | |
eic_line_interrupt(2); | |
} | |
/** | |
* \brief Interrupt handler for EIC line 3. | |
*/ | |
void EIC_3_Handler(void) | |
{ | |
eic_line_interrupt(3); | |
} | |
/** | |
* \brief Interrupt handler for EIC line 4. | |
*/ | |
void EIC_4_Handler(void) | |
{ | |
eic_line_interrupt(4); | |
} | |
/** | |
* \brief Interrupt handler for EIC line 5. | |
*/ | |
void EIC_5_Handler(void) | |
{ | |
eic_line_interrupt(5); | |
} | |
/** | |
* \brief Interrupt handler for EIC line 6. | |
*/ | |
void EIC_6_Handler(void) | |
{ | |
eic_line_interrupt(6); | |
} | |
/** | |
* \brief Interrupt handler for EIC line 7. | |
*/ | |
void EIC_7_Handler(void) | |
{ | |
eic_line_interrupt(7); | |
} | |
/** | |
* \brief Interrupt handler for EIC line 8. | |
*/ | |
void EIC_8_Handler(void) | |
{ | |
eic_line_interrupt(8); | |
} | |
//@} | |
/// @cond 0 | |
/**INDENT-OFF**/ | |
#ifdef __cplusplus | |
} | |
#endif | |
/**INDENT-ON**/ | |
/// @endcond |