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[add][examples][var_export]add sample code for the var_export component 

Signed-off-by: WillianChan <chentingwei@rt-thread.com>
This commit is contained in:
WillianChan 2021-09-02 20:18:30 +08:00
parent e53ae3ddfa
commit f7657a94b5
1 changed files with 65 additions and 0 deletions
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examples/var_export/var_export_example.c Normal file
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/*
* Copyright (c) 2006-2021, RT-Thread Development Team
*
* SPDX-License-Identifier: Apache-2.0
*
* Change Logs:
* Date Author Notes
* 2021-09-02 WillianChan add var_export example code
*/
#include <var_export.h>
/* use VAR_EXPOR() to export 10 pieces of data into sections */
VAR_EXPORT(module0, identi0, 0);
VAR_EXPORT(module1, identi1, 1);
VAR_EXPORT(module2, identi2, 2);
VAR_EXPORT(module3, identi3, 3);
VAR_EXPORT(module4, identi4, 4);
VAR_EXPORT(module5, identi5, 5);
VAR_EXPORT(module6, identi6, 6);
VAR_EXPORT(module7, identi7, 7);
VAR_EXPORT(module8, identi8, 8);
VAR_EXPORT(module9, identi9, 9);
void found_by_module(void)
{
ve_iterator_t iter;
const ve_exporter_t* exporter;
ve_module_t module;
rt_base_t value;
/* query all exporters with the same name as module1 */
if (!ve_module_init(&module, "module1"))
/* initialize the iterator */
ve_iter_init(&module, &iter);
else
return;
while (1)
{
/* start iterating */
exporter = ve_iter_next(&iter);
if (exporter == RT_NULL)
break;
else
{
/* checks whether the value exists */
if (ve_value_exist(&module, "identi1") == RT_TRUE)
{
value = ve_value_get(&module, "identi1");
rt_kprintf("[ve_example] value = %dn", value);
return;
}
else
{
rt_kprintf("[ve_example] value not exist.\n");
return;
}
}
}
}
#ifdef RT_USING_FINSH
#include <finsh.h>
MSH_CMD_EXPORT(found_by_module, found by module);
#endif /* RT_USING_FINSH */