【国民技术N32项目移植】RTT之RTC移植

RTC是常用外设之一，这里展示用RT-Thread Studio 定配置与基本应用：

RT-Thread Setinngs

使用RTC

保存后退出

创建示例代码

在appliecation目录下新建rtc_sample.c，并输入如下代码：

/*
 * Copyright (c) 2006-2021, RT-Thread Development Team
 *
 * SPDX-License-Identifier: Apache-2.0
 *
 * Change Logs:
 * Date           Author       Notes
 * 2023-02-13     43138       the first version
 */
#include <rtthread.h>
#include <rtdevice.h>

#define RTC_NAME "rtc"

static int rtc_sample(int argc, char *argv[])
{
    rt_err_t ret = RT_EOK;
    time_t  now;
    rt_device_t device = RT_NULL;

    device = rt_device_find(RTC_NAME);
    if(!device)
    {
        rt_kprintf("find %s failed!", RTC_NAME);
        return RT_ERROR;
    }

    if(rt_device_open(device, 0) != RT_EOK)
    {
        rt_kprintf("open %s failed!", RTC_NAME);
        return RT_ERROR;
    }

    ret = set_date(2023, 2, 13);
    if (ret != RT_EOK) {
        rt_kprintf("set RTC date failed\n");
        return ret;
    }

    ret = set_time(16, 7, 13);
    if (ret != RT_EOK) {
        rt_kprintf("set RTC time failed\n");
        return ret;
    }
    now = time(RT_NULL);
    rt_kprintf("%s\n",ctime(&now));
    rt_thread_mdelay(10000);
    now = time(RT_NULL);
    rt_kprintf("%s\n",ctime(&now));
    return ret;
}
//导出到msh命令列表中
MSH_CMD_EXPORT(rtc_sample, rtc sample);