4668adcf1f
this follows the license change of the master branches in [43561de]. all files whose copyright is not my own are originally based on files whose license has been changed in master. the expression used for the conversion was: sed -i -e 's/This program is free software: you can redistribute/This library is free software: you can redistribute/g' -e 's/under the terms of the GNU General Public License as published/under the terms of the GNU Lesser General Public License as published/' -e 's/This program is distributed in the hope that/This library is distributed in the hope that/g' -e 's/You should have received a copy of the GNU General/You should have received a copy of the GNU Lesser General/' -e 's/along with this program. If not/along with this library. If not/' -e 's/GNU General Public License for more details/GNU Lesser General Public License for more details/' */**/efm32/**/*(.) [43561de] 43561de3297b88d68753cb4625d6dc48bfb43d71
72 lines
2.0 KiB
C
72 lines
2.0 KiB
C
/*
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* This file is part of the libopencm3 project.
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*
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* Copyright (C) 2012 chrysn <chrysn@fsfe.org>
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*
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* This library is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Lesser General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public License
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* along with this library. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <libopencm3/efm32/tinygecko/irq.h>
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#include <libopencm3/efm32/tinygecko/emu.h>
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#define ISER0 MMIO32(0xE000E100)
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void interrupt_setup()
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{
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// These are the ports the pin interrupts for 8 and 11 are to be
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// configured to, and they should trigger on falling edge.
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GPIO_EXTIPSELH = (BUTTON0_PORT_EXTIPSEL << ((BUTTON0_PIN_NUMBER-8)*4)) |
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(BUTTON1_PORT_EXTIPSEL << ((BUTTON1_PIN_NUMBER-8)*4));
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GPIO_EXTIFALL = BUTTON0_PIN | BUTTON1_PIN;
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// Enable interrupts on the GPIO side
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GPIO_INSENSE = GPIO_INSENSE_INT;
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GPIO_IEN = BUTTON0_PIN | BUTTON1_PIN;
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// Enable GPIO interrupts in NVIC
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ISER0 = (1<<IRQ_GPIO_EVEN) | (1<<IRQ_GPIO_ODD);
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}
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int main(void)
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{
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gpio_setup();
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interrupt_setup();
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while(1) {
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emu_sleep_em1();
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};
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}
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void gpio_even_isr()
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{
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// Clearing the GPIO interrupt pending register. While the NVIC
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// interrupt pending register gets cleared automatically once it jumps
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// here, the pin's pending state has to be cleared explicitly.
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// (Dispatch to different subroutines for different even pins that
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// trigger an interrupt would happen here.)
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GPIO_IFC = BUTTON0_PIN;
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led_on();
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}
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void gpio_odd_isr()
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{
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// See gpio_even_isr.
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GPIO_IFC = BUTTON1_PIN;
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led_off();
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}
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