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77327181e0
This patch introduces an example application to demonstrate how to use GPIO driver APIs to manipulate interrupt pins. The application uses default galileo pinmux initialization and sets the GPIO 5 (IO2) as output pin and GPIO 6 (IO3) as interrupt. It toggles the output pin stat at every half second in order to emulate an interrupt. This triggers an interrupt and the application callback is called.
95 lines
3.2 KiB
C
95 lines
3.2 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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#include "i2c.h"
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#include "galileo-pinmux.h"
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#define PIN_OUTPUT 5
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#define PIN_INTR 6
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static struct ctimer timer;
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static struct quarkX1000_i2c_config i2c_config;
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PROCESS(gpio_interrupt_process, "GPIO Interrupt Process");
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AUTOSTART_PROCESSES(&gpio_interrupt_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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/* emulate an interrupt */
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quarkX1000_gpio_write(PIN_OUTPUT, 0);
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quarkX1000_gpio_write(PIN_OUTPUT, 1);
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ctimer_reset(&timer);
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}
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/*---------------------------------------------------------------------------*/
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static void
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callback(uint32_t status)
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{
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printf("GPIO interrupt callback called, status: %d\n", status);
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}
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/*---------------------------------------------------------------------------*/
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PROCESS_THREAD(gpio_interrupt_process, ev, data)
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{
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PROCESS_BEGIN();
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i2c_config.speed = QUARKX1000_I2C_SPEED_STANDARD;
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i2c_config.addressing_mode = QUARKX1000_I2C_ADDR_MODE_7BIT;
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quarkX1000_i2c_init();
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quarkX1000_i2c_configure(&i2c_config);
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/* use default pinmux configuration */
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galileo_pinmux_initialize();
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quarkX1000_gpio_init();
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quarkX1000_gpio_config(PIN_OUTPUT, QUARKX1000_GPIO_OUT);
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quarkX1000_gpio_config(PIN_INTR, QUARKX1000_GPIO_INT | QUARKX1000_GPIO_ACTIVE_HIGH | QUARKX1000_GPIO_EDGE);
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quarkX1000_gpio_set_callback(callback);
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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 interrupt 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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