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/**
* \file
*
* \brief SAM TCC - Timer Counter for Control Applications Callback Driver
*
* Copyright (C) 2013-2016 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
*
*/
/*
* Support and FAQ: visit <a href="http://www.atmel.com/design-support/">Atmel Support</a>
*/
#include "tcc_callback.h"
void *_tcc_instances[TCC_INST_NUM];
void _tcc_interrupt_handler(uint8_t module_index);
const uint32_t _tcc_intflag[TCC_CALLBACK_N] = {
TCC_INTFLAG_OVF,
TCC_INTFLAG_TRG,
TCC_INTFLAG_CNT,
TCC_INTFLAG_ERR,
TCC_INTFLAG_FAULTA,
TCC_INTFLAG_FAULTB,
TCC_INTFLAG_FAULT0,
TCC_INTFLAG_FAULT1,
#define _TCC_INTFLAG_MC(n,dummy) TCC_INTFLAG_MC##n,
/* TCC_INTFLAG_MC0 ~ ... */
MREPEAT(TCC_NUM_CHANNELS, _TCC_INTFLAG_MC, 0)
#undef _TCC_INTFLAG_MC
};
# define _TCC_INTERRUPT_VECT_NUM(n, unused) \
SYSTEM_INTERRUPT_MODULE_TCC##n,
/**
* \internal Get the interrupt vector for the given device instance
*
* \param[in] The TCC module instance number
*
* \return Interrupt vector for of the given TCC module instance.
*/
static enum system_interrupt_vector _tcc_interrupt_get_interrupt_vector(
uint32_t inst_num)
{
static uint8_t tcc_interrupt_vectors[TCC_INST_NUM] = {
MREPEAT(TCC_INST_NUM, _TCC_INTERRUPT_VECT_NUM, 0)
};
return (enum system_interrupt_vector)tcc_interrupt_vectors[inst_num];
}
/**
* \brief Registers a callback
*
* Registers a callback function which is implemented by the user.
*
* \note The callback must be enabled by \ref tcc_enable_callback,
* in order for the interrupt handler to call it when the conditions for the
* callback type is met.
*
* \param[in] module Pointer to TCC software instance struct
* \param[in] callback_func Pointer to callback function
* \param[in] callback_type Callback type given by an enum
*/
enum status_code tcc_register_callback(
struct tcc_module *const module,
tcc_callback_t callback_func,
const enum tcc_callback callback_type)
{
/* Sanity check arguments */
Assert(module);
Assert(callback_func);
/* Register callback function */
module->callback[callback_type] = callback_func;
/* Set the bit corresponding to the callback_type */
module->register_callback_mask |= _tcc_intflag[callback_type];
return STATUS_OK;
}
/**
* \brief Unregisters a callback
*
* Unregisters a callback function implemented by the user. The callback should
* be disabled before it is unregistered.
*
* \param[in] module Pointer to TCC software instance struct
* \param[in] callback_type Callback type given by an enum
*/
enum status_code tcc_unregister_callback(
struct tcc_module *const module,
const enum tcc_callback callback_type)
{
/* Sanity check arguments */
Assert(module);
/* Unregister callback function */
module->callback[callback_type] = NULL;
/* Clear the bit corresponding to the callback_type */
module->register_callback_mask &= ~_tcc_intflag[callback_type];
return STATUS_OK;
}
/**
* \brief Enables callback
*
* Enables the callback function registered by the \ref
* tcc_register_callback. The callback function will be called from the
* interrupt handler when the conditions for the callback type are
* met. This function will also enable the appropriate interrupts.
*
* \param[in] module Pointer to TCC software instance struct
* \param[in] callback_type Callback type given by an enum
*/
void tcc_enable_callback(
struct tcc_module *const module,
const enum tcc_callback callback_type)
{
/* Sanity check arguments */
Assert(module);
Assert(module->hw);
/* Enable interrupts for this TCC module */
system_interrupt_enable(_tcc_interrupt_get_interrupt_vector(
_tcc_get_inst_index(module->hw)));
/* Enable channel or other callbacks */
module->enable_callback_mask |= _tcc_intflag[callback_type];
module->hw->INTENSET.reg = _tcc_intflag[callback_type];
}
/**
* \brief Disables callback
*
* Disables the callback function registered by the \ref
* tcc_register_callback, and the callback will not be called from the
* interrupt routine. The function will also disable the appropriate
* interrupts.
*
* \param[in] module Pointer to TCC software instance struct
* \param[in] callback_type Callback type given by an enum
*/
void tcc_disable_callback(
struct tcc_module *const module,
const enum tcc_callback callback_type)
{
/* Sanity check arguments */
Assert(module);
Assert(module->hw);
/* Disable interrupts for this TCC module */
system_interrupt_disable(_tcc_interrupt_get_interrupt_vector(
_tcc_get_inst_index(module->hw)));
/* Disable channel or other callbacks */
module->enable_callback_mask &= ~_tcc_intflag[callback_type];
module->hw->INTENCLR.reg = _tcc_intflag[callback_type];
}
/**
* \internal ISR handler for TCC
*
* Auto-generate a set of interrupt handlers for each TCC in the device.
*/
#define _TCC_INTERRUPT_HANDLER(n, m) \
void TCC##n##_Handler(void) \
{ \
_tcc_interrupt_handler(n); \
}
MREPEAT(TCC_INST_NUM, _TCC_INTERRUPT_HANDLER, 0)
/**
* \internal Interrupt handler for the TCC module
*
* Handles interrupts as they occur, it will run the callback functions
* that are registered and enabled.
*
* \param[in] module_index ID of the TCC instance calling the interrupt
* handler
*/
void _tcc_interrupt_handler(
uint8_t module_index)
{
int i;
uint32_t interrupt_and_callback_status_mask;
struct tcc_module *module =
(struct tcc_module *)_tcc_instances[module_index];
interrupt_and_callback_status_mask = (module->hw->INTFLAG.reg &
module->register_callback_mask &
module->enable_callback_mask);
/* Check if callback interrupt has occured */
for (i = 0; i < TCC_CALLBACK_N; i ++) {
if (interrupt_and_callback_status_mask & _tcc_intflag[i]) {
/* Invoke the registered and enabled callback function */
(module->callback[i])(module);
/* Clear interrupt flag */
module->hw->INTFLAG.reg = _tcc_intflag[i];
}
}
}
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