adding helping tips on U-boot.

en/help-uboot.md

@@ -0,0 +1,19 @@
+Help: U-boot
+------------
+
+### Environment
+
+If you get `Too many args` error while trying to set an environment variable,
+try to do that from within Linux using `fw_setenv` instead of `setenv` in U-boot.
+
+__U-boot console:__
+```
+hisilicon # setenv uk 'mw.b 0x82000000 ff 1000000; tftp 0x82000000 uImage.${soc}; sf probe 0; sf erase 0x50000 0x200000; sf write 0x82000000 0x50000 ${filesize}'
+** Too many args (max. 16) **
+```
+
+__OpenIPC Linux:__
+```
+root@openipc-hi3518ev100:~# fw_setenv uk 'mw.b 0x82000000 ff 1000000; tftp 0x82000000 uImage.${soc}; sf probe 0; sf erase 0x50000 0x200000; sf write 0x82000000 0x50000 ${filesize}'
+root@openipc-hi3518ev100:~#
+```

en/index.md

@@ -2,9 +2,9 @@
 [Table of Content](index.md)
 
 ## Introduction
-- [About project](menu-index.md)
+- [About the project](menu-index.md)
 - [Supported devices](https://openipc.org/wiki/en/guide-supported-devices)
-- [Show changelog](show-changelog.md)
+- [Changelog](show-changelog.md)
 
 ## Subprojects
 - [coupler](https://openipc.org/coupler)
@@ -20,7 +20,7 @@
 - [Installation on SigmaStar based boards](install-ssc335.md)
 - [Installation on XM510 based boards](install-xm510.md)
 - [Installation on XM530 based boards](install-xm530.md)
-- [Veryld full manual](old-manual.md)
+- [Very old full manual](old-manual.md)
 
 ## Usage
 - [System features](system-features.md)
@@ -46,6 +46,9 @@
 - [FFMPEG usage](dev-ffmpeg-usage.md)
 - [Kernel configuration for adding new platforms](integration-kernel.md)
 
+## Help, Tips, and Tricks
+- [U-boot](help-uboot.md)
+
 ## Contacts
 - [Bug reports](https://github.com/OpenIPC/firmware/issues)