flash_cc2531/wiringPi.c

/*-
 * Copyright 2020 John-Mark Gurney.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 *
 */

#include <sys/types.h>
#include <libgpio.h>
#include <time.h>
#include <stdint.h>
#include <stdlib.h>

#include <wiringPi.h>

long
micros(void)
{
	int64_t i;
	struct timespec ts;

	clock_gettime(CLOCK_MONOTONIC_PRECISE, &ts);

	i = ts.tv_sec * 1000000000 + ts.tv_nsec;
	i /= 1000;

	return i;
}

static int opened;
static gpio_handle_t gpiohndl;

int
wiringPiSetup(void)
{

	if (opened)
		return 1;

	gpiohndl = gpio_open(0);
	opened = 1;

	return 1;
}

void
pinMode(int pinnum, enum wp_dir direction)
{

	if (direction == INPUT)
		gpio_pin_input(gpiohndl, pinnum);
	else if (direction == OUTPUT)
		gpio_pin_output(gpiohndl, pinnum);
}

enum wp_value
digitalRead(int pinnum)
{
	gpio_value_t v;

	v = gpio_pin_get(gpiohndl, pinnum);
	if (v == GPIO_VALUE_LOW)
		return LOW;
	else if (v == GPIO_VALUE_HIGH)
		return HIGH;
	else
		abort();
}

void
digitalWrite(int pinnum, enum wp_value value)
{
	gpio_value_t v;

	if (value == LOW)
		v = GPIO_VALUE_LOW;
	else if (value == HIGH)
		v = GPIO_VALUE_HIGH;
	else
		abort();

	gpio_pin_set(gpiohndl, pinnum, v);
}