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/**
*
* \file
*
* \brief SAM Segment Liquid Crystal Display(SLCD) Controller.
*
* Copyright (c) 2015 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 "slcd.h"
#include "slcd_callback.h"
/**
* \internal
* \brief slcd callback function pointer
*/
slcd_callback_t slcd_callback_pointer[SLCD_CALLBACK_TYPE_NUM];
/**
* \brief Registers a callback
*
* Registers a callback function which is implemented by the user.
*
* \note The callback must be enabled by \ref slcd_enable_callback,
* in order for the interrupt handler to call it when the conditions for the
* callback type is met.
*
* \param[in] callback_func Pointer to callback function
* \param[in] callback_type Callback type given by an enum
*
* \retval STATUS_OK The function exited successfully
* \retval STATUS_ERR_INVALID_ARG If an invalid callback type was supplied
*/
enum status_code slcd_register_callback(
const slcd_callback_t callback,
const enum slcd_callback_type type)
{
if (type >= SLCD_CALLBACK_TYPE_NUM){
return STATUS_ERR_INVALID_ARG;
}
slcd_callback_pointer[type] = callback;
return STATUS_OK;
}
/**
* \brief Unregisters a callback
*
* Unregisters a callback function implemented by the user.
*
* \param[in] callback_type Callback type given by an enum
*
* \retval STATUS_OK The function exited successfully
* \retval STATUS_ERR_INVALID_ARG If an invalid callback type was supplied
*/
enum status_code slcd_unregister_callback(
const slcd_callback_t callback,
const enum slcd_callback_type type)
{
if (type >= SLCD_CALLBACK_TYPE_NUM){
return STATUS_ERR_INVALID_ARG;
}
slcd_callback_pointer[type] = NULL;
return STATUS_OK;
}
/**
* \internal The SLCD interrupt handler.
*/
void SLCD_Handler(void)
{
uint32_t status = SLCD->INTFLAG.reg;
for (uint8_t i = 0; i < SLCD_CALLBACK_TYPE_NUM; i++) {
if (status & (1 << i)) {
/* Clear the INTFLAG anyway */
SLCD->INTFLAG.reg = 1 << i;
if (slcd_callback_pointer[i]) {
slcd_callback_pointer[i]((enum slcd_callback_type)i);
}
}
}
}
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