/****************************************************************************
*
* Copyright (C) 2012 PX4 Development Team. All rights reserved.
*
* 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.
* 3. Neither the name PX4 nor the names of its contributors may be
* used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS 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
* COPYRIGHT OWNER 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.
*
****************************************************************************/
/**
* @file px4io.c
* Top-level logic for the PX4IO module.
*/
#include <nuttx/config.h>
#include <stdio.h>
#include <stdbool.h>
#include <fcntl.h>
#include <unistd.h>
#include <debug.h>
#include <stdlib.h>
#include <errno.h>
#include <nuttx/clock.h>
#include <arch/board/up_boardinitialize.h>
#include <arch/board/drv_gpio.h>
#include <arch/board/drv_ppm_input.h>
#include <arch/board/up_hrt.h>
#include "px4io.h"
__EXPORT int user_start(int argc, char *argv[]);
struct sys_state_s system_state;
int gpio_fd;
static const char cursor[] = {'|', '/', '-', '\\'};
static const char *rc_input_mq_name = "rc_input";
static struct hrt_call timer_tick_call;
volatile int timers[TIMER_NUM_TIMERS];
static void timer_tick(void *arg);
int user_start(int argc, char *argv[])
{
int cycle = 0;
bool heartbeat = false;
bool failsafe = false;
/* Do board init */
(void)up_boardinitialize();
/* print some startup info */
lib_lowprintf("\nPX4IO: starting\n");
struct mallinfo minfo = mallinfo();
lib_lowprintf("free %u largest %u\n", minfo.mxordblk, minfo.fordblks);
/* start the software timer service */
hrt_call_every(&timer_tick_call, 1000, 1000, timer_tick, NULL);
/* Open the GPIO driver so we can do LEDs and the like. */
gpio_fd = open("/dev/gpio", 0);
ASSERTCODE((gpio_fd >= 0), A_GPIO_OPEN_FAIL);
/* default all the LEDs to off while we start */
LED_AMBER(heartbeat);
LED_BLUE(failsafe);
LED_SAFETY(false);
/* turn on servo power */
POWER_SERVO(true);
/* configure the PPM input driver */
ppm_input_init(rc_input_mq_name);
/* start the mixer */
mixer_init(rc_input_mq_name);
/* start the safety switch handler */
safety_init();
/* init the FMU link */
comms_init();
/* set up some timers for the main loop */
timers[TIMER_BLINK_AMBER] = 250; /* heartbeat blink @ 2Hz */
timers[TIMER_STATUS_PRINT] = 1000; /* print status message @ 1Hz */
/*
* Main loop servicing communication with FMU
*/
while(true) {
/* check for communication from FMU, send updates */
comms_check();
/* blink the heartbeat LED */
if (timers[TIMER_BLINK_AMBER] == 0) {
timers[TIMER_BLINK_AMBER] = 250;
LED_AMBER((heartbeat = !heartbeat));
}
/* blink the failsafe LED if we don't have FMU input */
if (!system_state.mixer_use_fmu) {
if (timers[TIMER_BLINK_BLUE] == 0) {
timers[TIMER_BLINK_BLUE] = 125;
LED_BLUE((failsafe = !failsafe));
}
} else {
LED_BLUE((failsafe = false));
}
/* print some simple status */
if (timers[TIMER_STATUS_PRINT] == 0) {
timers[TIMER_STATUS_PRINT] = 1000;
lib_lowprintf("%c %s | %s | %s | C=%d \r",
cursor[cycle++ & 3],
(system_state.armed ? "ARMED" : "SAFE"),
(system_state.rc_channels ? "RC OK" : "NO RC"),
(system_state.mixer_use_fmu ? "FMU OK" : "NO FMU"),
system_state.rc_channels
);
}
}
/* Should never reach here */
return ERROR;
}
static void
timer_tick(void *arg)
{
for (unsigned i = 0; i < TIMER_NUM_TIMERS; i++)
if (timers[i] > 0)
timers[i]--;
}