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project:build.sh: Added fastboot support; custom modifications to U-Boot and kernel implemented using patches.
project:cfg:BoardConfig_IPC: Added fastboot BoardConfig file and firmware post-scripts, distinguishing between the BoardConfigs for Luckfox Pico Pro and Luckfox Pico Max. project:app: Added fastboot_client and rk_smart_door for quick boot applications; updated rkipc app to adapt to the latest media library. media:samples: Added more usage examples. media:rockit: Fixed bugs; removed support for retrieving data frames from VPSS. media:isp: Updated rkaiq library and related tools to support connection to RKISP_Tuner. sysdrv:Makefile: Added support for compiling drv_ko on Luckfox Pico Ultra W using Ubuntu; added support for custom root filesystem. sysdrv:tools:board: Updated Buildroot optional mirror sources, updated some software versions, and stored device tree files and configuration files that undergo multiple modifications for U-Boot and kernel separately. sysdrv:source:mcu: Used RISC-V MCU SDK with RT-Thread system, mainly for initializing camera AE during quick boot. sysdrv:source:uboot: Added support for fastboot; added high baud rate DDR bin for serial firmware upgrades. sysdrv:source:kernel: Upgraded to version 5.10.160; increased NPU frequency for RV1106G3; added support for fastboot. Signed-off-by: luckfox-eng29 <eng29@luckfox.com>
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# NTP：网络时间协议
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## 1、介绍
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[NTP](https://baike.baidu.com/item/NTP) 是网络时间协议(Network Time Protocol)，它是用来同步网络中各个计算机时间的协议。
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在 RT-Thread 上实现了 NTP 客户端，连接上网络后，可以获取当前 UTC 时间，并更新至 RTC 中。
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## 2、使用
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首先打开 meunconfig ，配置并开启 netutils 软件包。在配置选项中，默认提供了 3 个 NTP 服务器，保证了 NTP 功能的可靠性。
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### 2.1 获取 UTC 时间
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[UTC 时间](https://baike.baidu.com/item/%E5%8D%8F%E8%B0%83%E4%B8%96%E7%95%8C%E6%97%B6/787659?fromtitle=UTC&fromid=5899996) 又称世界统一时间、世界标准时间、国际协调时间。北京时间为 UTC+8 时间，比 UTC 时间多 8 小时，或者理解为早 8 小时。
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API: `time_t ntp_get_time(void)`
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|参数 |描述|
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|:----- |:----|
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|return |`>0`: 当前 UTC 时间，`=0`：获取时间失败|
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示例代码：
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```C
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#include <ntp.h>
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void main(void)
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{
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time_t cur_time;
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cur_time = ntp_get_time();
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if (cur_time)
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{
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rt_kprintf("NTP Server Time: %s", ctime((const time_t*) &cur_time));
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}
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}
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```
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### 2.2 获取本地时间
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本地时间比 UTC 时间多了时区的概念，例如：北京时间为东八区，比 UTC 时间多 8 个小时。
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在 `menuconfig` 中可以设置当前时区，默认为 `8`
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API: `time_t ntp_get_local_time(void)`
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|参数 |描述|
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|:----- |:----|
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|return |`>0`: 当前本地时间，`=0`：获取时间失败|
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该 API 使用方法与 `ntp_get_time()` 类似
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### 2.3 同步本地时间至 RTC
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如果开启 RTC 设备，还可以使用下面的命令及 API 同步 NTP 的本地时间至 RTC 设备。
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Finsh/MSH 命令效果如下：
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```
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msh />ntp_sync
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Get local time from NTP server: Sat Feb 10 15:22:33 2018
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The system time is updated. Timezone is 8.
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msh />
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```
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API: `time_t ntp_sync_to_rtc(void)`
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|参数 |描述|
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|:----- |:----|
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|return |`>0`: 当前本地时间，`=0`：同步时间失败|
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## 3、注意事项
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- 1、NTP API 方法执行时会占用较多的线程堆栈，使用时保证堆栈空间充足（≥1.5K）；
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- 2、NTP API 方法 **不支持可重入** ，并发使用时，请注意加锁。
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