98 lines
3.4 KiB
C
98 lines
3.4 KiB
C
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/*
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* Copyright (c) 2014, Texas Instruments Incorporated - http://www.ti.com/
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the copyright holder nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
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* OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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/*---------------------------------------------------------------------------*/
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#include "ioc.h"
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#include "gpio-interrupt.h"
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#include "sys/energest.h"
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#include "lpm.h"
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#include "ti-lib.h"
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#include <string.h>
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/*---------------------------------------------------------------------------*/
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#define gpio_interrupt_isr GPIOIntHandler
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/*---------------------------------------------------------------------------*/
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/* Handler array */
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static gpio_interrupt_handler_t handlers[NUM_IO_MAX];
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/*---------------------------------------------------------------------------*/
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void
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gpio_interrupt_register_handler(uint8_t ioid, gpio_interrupt_handler_t f)
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{
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uint8_t interrupts_disabled = ti_lib_int_master_disable();
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/* Clear interrupts on specified pins */
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ti_lib_gpio_event_clear(1 << ioid);
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handlers[ioid] = f;
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/* Re-enable interrupts */
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if(!interrupts_disabled) {
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ti_lib_int_master_enable();
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}
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}
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/*---------------------------------------------------------------------------*/
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void
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gpio_interrupt_init()
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{
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int i;
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for(i = 0; i < NUM_IO_MAX; i++) {
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handlers[i] = NULL;
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}
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ti_lib_int_enable(INT_EDGE_DETECT);
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}
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/*---------------------------------------------------------------------------*/
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void
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gpio_interrupt_isr(void)
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{
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uint32_t pin_mask;
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uint8_t i;
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ENERGEST_ON(ENERGEST_TYPE_IRQ);
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/* Read interrupt flags */
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pin_mask = (HWREG(GPIO_BASE + GPIO_O_EVFLAGS31_0) & GPIO_PIN_MASK);
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/* Clear the interrupt flags */
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HWREG(GPIO_BASE + GPIO_O_EVFLAGS31_0) = pin_mask;
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/* Run custom ISRs */
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for(i = 0; i < NUM_GPIO_PINS; i++) {
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/* Call the handler if there is one registered for this event */
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if((pin_mask & (1 << i)) && handlers[i] != NULL) {
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handlers[i](i);
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}
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}
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ENERGEST_OFF(ENERGEST_TYPE_IRQ);
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}
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/*---------------------------------------------------------------------------*/
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