components: drivers: rtc: add the alarm using local time for calculation #10361
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- add the alarm using local time for calculation Signed-off-by: Runcheng Lu <runcheng.lu@hpmicro.com>
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Hi，作者您好。我在使用 STM32F407-RT-Spark 验证当前 PR 时，遇到了一个关于闹钟中断的问题。 我按照文档中的 Demo 进行了测试，并将设置闹钟时间的函数修改为了 localtime_r。运行发现无法触发闹钟中断。 检查后发现，当 RT_LIBC_TZ_DEFAULT_HOUR 默认设置为 8 (即 UTC+8) 时，闹钟中断无法触发。但当将其设置为 0 (即 UTC+0) 时，闹钟中断就能正常触发。看起来目前闹钟功能似乎只能在 UTC+0 时区下正常工作。 您那边能帮忙看看这个问题吗 |
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Hi，感谢测试，不过我是基于先楫BSP来的。默认alarm确实是UTC+0，你在master上应该也是这样的现象。RT_LIBC_TZ_DEFAULT_HOUR你并不需要改动，只需要使能下alarm驱动的RT_ALARM_USING_LOCAL_TIME，本Pr的alarm内部就会以local_time作为时间判断，应该就可以了。另外建议你测试的bsp，drv_rtc那里的闹钟设置和获取也可以进行判断下，比如： |
…t stamp - include the year, month, and day for rtc_alarm_time_set API - add local time conversion for get timeval and set stamp Signed-off-by: Runcheng Lu <runcheng.lu@hpmicro.com>
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Rbb666
approved these changes
Jun 9, 2025
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为什么提交这份PR (why to submit this PR)
rtc的alarm驱动不支持带时区（local time)的时间比较闹钟事件触发
你的解决方案是什么 (what is your solution)
在kconfig中加入使用本地时间的alarm的配置，RT_ALARM_USING_LOCAL_TIME，默认不使能，也就是默认还是UTC时区闹钟。
另外rt_alarm_dump命令加入支持timezone显示，这样比较直观些。