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/****************************************************************************
*
* Copyright (C) 2012 PX4 Development Team. All rights reserved.
* Author: Lorenz Meier <lm@inf.ethz.ch>
*
* 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 param.c
*
* Parameter tool.
*/
#include <nuttx/config.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <stdbool.h>
#include <unistd.h>
#include <fcntl.h>
#include <sys/stat.h>
#include <arch/board/board.h>
#include "systemlib/systemlib.h"
#include "systemlib/param/param.h"
#include "systemlib/err.h"
__EXPORT int param_main(int argc, char *argv[]);
static void do_save(void);
static void do_load(void);
static void do_import(void);
static void do_show(void);
static void do_show_print(void *arg, param_t param);
static const char *param_file_name = "/eeprom/parameters";
int
param_main(int argc, char *argv[])
{
if (argc >= 2) {
if (!strcmp(argv[1], "save"))
do_save();
if (!strcmp(argv[1], "load"))
do_load();
if (!strcmp(argv[1], "import"))
do_import();
if (!strcmp(argv[1], "show"))
do_show();
}
errx(1, "expected a command, try 'load', 'import', 'show' or 'save'\n");
}
static void
do_save(void)
{
/* delete the parameter file in case it exists */
unlink(param_file_name);
/* create the file */
int fd = open(param_file_name, O_WRONLY | O_CREAT | O_EXCL);
if (fd < 0)
err(1, "opening '%s' failed", param_file_name);
int result = param_export(fd, false);
close(fd);
if (result < 0) {
unlink(param_file_name);
errx(1, "error exporting to '%s'", param_file_name);
}
exit(0);
}
static void
do_load(void)
{
int fd = open(param_file_name, O_RDONLY);
if (fd < 0)
err(1, "open '%s'", param_file_name);
int result = param_load(fd);
close(fd);
if (result < 0)
errx(1, "error importing from '%s'", param_file_name);
exit(0);
}
static void
do_import(void)
{
int fd = open(param_file_name, O_RDONLY);
if (fd < 0)
err(1, "open '%s'", param_file_name);
int result = param_import(fd);
close(fd);
if (result < 0)
errx(1, "error importing from '%s'", param_file_name);
exit(0);
}
static void
do_show(void)
{
printf(" + = saved, * = unsaved\n");
param_foreach(do_show_print, NULL, false);
exit(0);
}
static void
do_show_print(void *arg, param_t param)
{
int32_t i;
float f;
printf("%c %s: ",
param_value_unsaved(param) ? '*' : (param_value_is_default(param) ? ' ' : '+'),
param_name(param));
/*
* This case can be expanded to handle printing common structure types.
*/
switch (param_type(param)) {
case PARAM_TYPE_INT32:
if (!param_get(param, &i)) {
printf("%d\n", i);
return;
}
break;
case PARAM_TYPE_FLOAT:
if (!param_get(param, &f)) {
printf("%4.4f\n", (double)f);
return;
}
break;
case PARAM_TYPE_STRUCT ... PARAM_TYPE_STRUCT_MAX:
printf("<struct type %d size %u>\n", 0 + param_type(param), param_size(param));
return;
default:
printf("<unknown type %d>\n", 0 + param_type(param));
return;
}
printf("<error fetching parameter %d>\n", param);
}
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