d9fb4f7401
Add an example using the RTC to help with a lower power design. This is a sister example to the existing "button-irq-printf", which is functionally identical, but uses far less power. There's more tricks that can be done to lower the power even further, but this shows a few of the early steps that can be done, using the RTC wakeup instead of a timer.
59 lines
1.5 KiB
C
59 lines
1.5 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 Karl Palsson <karlp@tweak.net.au>
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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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#ifndef SYSCFG_H
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#define SYSCFG_H
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#ifdef __cplusplus
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extern "C" {
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#endif
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#include <libopencm3/cm3/nvic.h>
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#include <libopencm3/stm32/gpio.h>
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#include <libopencm3/stm32/exti.h>
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#include <libopencm3/stm32/usart.h>
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#define USART_CONSOLE USART2
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#define USE_NASTYLOG 1
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#define LED_DISCO_GREEN_PORT GPIOB
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#define LED_DISCO_GREEN_PIN GPIO7
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#define LED_DISCO_BLUE_PORT GPIOB
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#define LED_DISCO_BLUE_PIN GPIO6
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#define BUTTON_DISCO_USER_PORT GPIOA
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#define BUTTON_DISCO_USER_PIN GPIO0
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#define BUTTON_DISCO_USER_EXTI EXTI0
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#define BUTTON_DISCO_USER_isr exti0_isr
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#define BUTTON_DISCO_USER_NVIC NVIC_EXTI0_IRQ
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struct state_t {
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bool falling;
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int tickcount;
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};
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#ifdef __cplusplus
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}
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#endif
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#endif /* SYSCFG_H */
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