/* * This file is part of the libopencm3 project. * * Copyright (C) 2012 chrysn * * This program is free software: you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation, either version 3 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program. If not, see . */ /** @file Common definitions used by all lightswitch implementations */ #include #include /** The User LED is connected to PD7 to the plus side of the LED according to * t0011_efm32_tiny_gecko_stk_user_manual.pdf figures 16.2 and 16.3 (called * UIF_LED0) */ #define LED_PORT GPIO_PD #define LED_PIN GPIO7 #define BUTTON0_PORT GPIO_PD #define BUTTON0_PORT_EXTIPSEL GPIO_EXTIPSEL_PORTD #define BUTTON0_PIN_NUMBER 8 #define BUTTON0_PIN GPIO8 #define BUTTON1_PORT GPIO_PB #define BUTTON1_PORT_EXTIPSEL GPIO_EXTIPSEL_PORTB #define BUTTON1_PIN_NUMBER 11 #define BUTTON1_PIN GPIO11 void gpio_setup(void); void led_on(void); void led_off(void); bool pb0_get(void); bool pb1_get(void); /** * Enable GPIO, and set up port D7 as an output pin and D8 and B11 as input. */ void gpio_setup(void) { // Before GPIO works, according to d0034_efm32tg_reference_manual.pdf // note in section 28.3.7, we'll have to enable GPIO in CMU_HFPERCLKEN0 CMU_HFPERCLKEN0 |= CMU_HFPERCLKEN0_GPIO; gpio_set_mode(LED_PORT, GPIO_MODE_PUSHPULL, LED_PIN); // Button PB0 is connected to pin PD8 and pulled low when pushed, // Botton PB1 to pin PB11 (sources as for LED). Pullups and debouncing // are alreay in place in hardware, so no filtering or pullup is // needed. gpio_set_mode(BUTTON0_PORT, GPIO_MODE_INPUT, BUTTON0_PIN); gpio_set_mode(BUTTON1_PORT, GPIO_MODE_INPUT, BUTTON1_PIN); } void led_on(void) { gpio_set(LED_PORT, LED_PIN); } void led_off(void) { gpio_clear(LED_PORT, LED_PIN); } bool pb0_get(void) { return !gpio_get(GPIO_PD, GPIO8); } bool pb1_get(void) { return !gpio_get(GPIO_PB, GPIO11); }