66 lines
2.2 KiB
C
66 lines
2.2 KiB
C
/*
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* MIT License
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*
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* Copyright (c) 2020 Joey Castillo
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in all
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* copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*/
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#include <stdio.h>
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#include "watch_extint.h"
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#include "watch_gpio.h"
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#include "eic.h"
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watch_cb_t eic_callbacks[16] = { NULL };
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void watch_eic_callback(uint8_t channel);
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void watch_enable_external_interrupts(void) {
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eic_init();
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eic_configure_callback(watch_eic_callback);
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eic_enable();
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}
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void watch_disable_external_interrupts(void) {
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eic_disable();
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}
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void watch_register_interrupt_callback(const uint8_t pin, watch_cb_t callback, eic_interrupt_trigger trigger) {
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watch_enable_digital_input(pin);
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// check if this is a button pin
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if (pin == HAL_GPIO_BTN_LIGHT_pin() || pin == HAL_GPIO_BTN_MODE_pin() || pin == HAL_GPIO_BTN_ALARM_pin()) {
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// if so, enable the pull-down resistor
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watch_enable_pull_down(pin);
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}
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int8_t channel = eic_configure_pin(pin, trigger);
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if (channel >= 0 && channel < 16) {
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printf("Configured port %d pin %d on channel %d\n", pin >> 5, pin & 0x1F, channel);
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eic_enable_interrupt(pin);
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eic_callbacks[channel] = callback;
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}
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}
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void watch_eic_callback(uint8_t channel) {
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if (eic_callbacks[channel] != NULL) {
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eic_callbacks[channel]();
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}
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}
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