cc51f89b31
This patch introduces an example application to demonstrate how to use GPIO driver APIs to manipulate output pins. The application sets the GPIO 4 pin as output pin and toggles its state at every half second.
74 lines
2.5 KiB
C
74 lines
2.5 KiB
C
/*
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* Copyright (C) 2015, Intel Corporation. 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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*
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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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#include <stdio.h>
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#include "contiki.h"
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#include "sys/ctimer.h"
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#include "gpio.h"
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#define PIN 4 /* IO1 */
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static uint32_t value;
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static struct ctimer timer;
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PROCESS(gpio_output_process, "GPIO Output Process");
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AUTOSTART_PROCESSES(&gpio_output_process);
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/*---------------------------------------------------------------------------*/
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static void
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timeout(void *data)
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{
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/* toggle pin state */
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value = !value;
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quarkX1000_gpio_write(PIN, value);
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ctimer_reset(&timer);
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}
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/*---------------------------------------------------------------------------*/
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PROCESS_THREAD(gpio_output_process, ev, data)
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{
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PROCESS_BEGIN();
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quarkX1000_gpio_init();
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quarkX1000_gpio_config(PIN, QUARKX1000_GPIO_OUT);
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quarkX1000_gpio_clock_enable();
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ctimer_set(&timer, CLOCK_SECOND / 2, timeout, NULL);
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printf("GPIO output example is running\n");
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PROCESS_YIELD();
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quarkX1000_gpio_clock_disable();
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PROCESS_END();
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}
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