Update fpv-sigmastar.md (#212)

en/fpv-sigmastar.md

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 [Table of Content](../README.md)
 
 Instructions for installing OpenIPC firmware on SigmaStar devices
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 <p align="center">
   <img src="https://github.com/OpenIPC/wiki/blob/master/images/fpv-logo.jpg?raw=true" alt="Logo"/>
 </p>
 
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 ### SSC338Q + IMX415 + NAND flash, board from CamHi vendor
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 #### Quick note on experiments, will be revised and updated
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 * [The files for this experiment are temporarily available here](https://github.com/OpenIPC/sandbox-fpv/tree/master/sigmastar)
 
 #### Explanations
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 The Sigmastar IPL (pre-bootloader) allows to boot a custom U-Boot from the sdcard.
 The provided UBOOT + uImage.ssc338q is a fully working openipc firmware, that you can connect to via SSH / WEB over the ethernet connection.
 
 With this temporary openipc firmware you can create a backup of the internal NAND and flash the permanent openipc firmware to the NAND.
 
 #### Prepare
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 Here is the sdcard firmware to install openipc to the nand flash.
 
 - Connect your SD card to your computer, create a 1 GB partition on it, format it as FAT32 / VFAT.
 - In Linux you just need to use the commands fdisk and mkfs.vfat
 - Mount disk and unpack ssc338q_initramfs.zip and copy both files to the root directory.
-- The UBOOT and uImage.ssc338q is used for the temporary sdcard system and to gain access to the NANAD flash.
+- The UBOOT and uImage.ssc338q is used for the temporary sdcard system and to gain access to the NAND flash.
 - Reboot the device and let it start from the SD card
 - $\color{red}{\texttt{Do not stop the bootloader under any circumstances!}}$
 
 #### Backup 
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 - The /dev/mtd0 uses the complete partition size of the nand flash, so this can also be used for a backup.
 - But this might take some time, the backup to the sdcard is very slow.
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 ```
 nanddump -f /mnt/mmcblk0p1/backup-nand.bin /dev/mtd0
 ```
 
 #### Install
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 The ssc338q-nand.bin includes the current distributor bootloader and nand ultimate firmware.
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 ```
 flash_eraseall /dev/mtd0
 nandwrite /dev/mtd0 /mnt/mmcblk0p1/ssc338q-nand.bin
 ```
 
 #### Buying a device (CamHi vendor)
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 - https://aliexpress.com/item/1005002879158570.html
 
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 ### SSC338Q + IMX415 + NOR flash, board from Anjoy vendor
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 #### Information collection continues
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 Information collection continues
 
 #### Buying a device (Anjoy vendor)
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 - https://aliexpress.com/item/1005003738087454.html
 
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 ### Other notes
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 For testing please use the [MPV](https://mpv.io/) player, in which the Shift+I key combination can be used to get debugging information.
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